Make WordPress Core

Changeset 23466


Ignore:
Timestamp:
02/21/2013 09:24:34 PM (14 years ago)
Author:
nacin
Message:

Move revisions/autosave and post format functions from wp-includes/post.php into revision.php and post-formats.php.

Location:
trunk
Files:
3 edited
2 copied

Legend:

Unmodified
Added
Removed
  • trunk/wp-includes/formatting.php

    r23450 r23466  
    17961796                $output = $text;
    17971797        }
    1798         return $output;
    1799 }
    1800 
    1801 /**
    1802  * Return the class for a post format content wrapper
    1803  *
    1804  * @since 3.6.0
    1805  *
    1806  * @param string $format
    1807  */
    1808 function get_post_format_content_class( $format ) {
    1809         return apply_filters( 'post_format_content_class', 'post-format-content', $format );
    1810 }
    1811 
    1812 /**
    1813  * Ouput the class for a post format content wrapper
    1814  *
    1815  * @since 3.6.0
    1816  *
    1817  * @param string $format
    1818  */
    1819 function post_format_content_class( $format ) {
    1820         echo get_post_format_content_class( $format );
    1821 }
    1822 
    1823 /**
    1824  * Provide fallback behavior for Posts that have associated post format
    1825  *
    1826  * @since 3.6.0
    1827  *
    1828  * @param string $content
    1829  */
    1830 function post_formats_compat( $content, $id = 0 ) {
    1831         $post = empty( $id ) ? get_post() : get_post( $id );
    1832         if ( empty( $post ) )
    1833                 return $content;
    1834 
    1835         $format = get_post_format( $post );
    1836         if ( empty( $format ) || in_array( $format, array( 'status', 'aside', 'chat' ) ) )
    1837                 return $content;
    1838 
    1839         if ( current_theme_supports( 'post-formats', $format ) )
    1840                 return $content;
    1841 
    1842         $defaults = array(
    1843                 'position' => 'after',
    1844                 'tag' => 'div',
    1845                 'class' => get_post_format_content_class( $format ),
    1846                 'link_class' => '',
    1847                 'image_class' => '',
    1848                 'gallery' => '[gallery]',
    1849                 'audio' => '',
    1850                 'video' => ''
    1851         );
    1852 
    1853         $args = apply_filters( 'post_format_compat', array() );
    1854         $compat = wp_parse_args( $args, $defaults );
    1855 
    1856         $show_content = true;
    1857         $format_output = '';
    1858         $meta = get_post_format_meta( $post->ID );
    1859 
    1860         switch ( $format ) {
    1861                 case 'link':
    1862                         $compat['tag'] = '';
    1863 
    1864                         if ( ! empty( $meta['url'] ) ) {
    1865                                 $esc_url = preg_quote( $meta['url'], '#' );
    1866                                 // Make sure the same URL isn't in the post (modified/extended versions allowed)
    1867                                 if ( ! preg_match( '#' . $esc_url . '[^/&\?]#', $content ) ) {
    1868                                         $format_output .= sprintf(
    1869                                                 '<a %shref="%s">%s</a>',
    1870                                                 empty( $compat['link_class'] ) ? '' : sprintf( 'class="%s" ', esc_attr( $compat['link_class'] ) ),
    1871                                                 esc_url( $meta['url'] ),
    1872                                                 empty( $post->post_title ) ? esc_url( $meta['url'] ) : apply_filters( 'the_title', $post->post_title )
    1873                                         );
    1874                                 }
    1875                         }
    1876                         break;
    1877 
    1878                 case 'quote':
    1879                         if ( ! empty( $meta['quote'] ) && ! stristr( $content, $meta['quote'] ) ) {
    1880                                 $format_output .= sprintf( '<blockquote>%s</blockquote>', $meta['quote'] );
    1881                                 if ( ! empty( $meta['quote_source'] ) ) {
    1882                                         $format_output .= sprintf(
    1883                                                 '<cite>%s</cite>',
    1884                                                 ! empty( $meta['url'] ) ?
    1885                                                         sprintf( '<a href="%s">%s</a>', esc_url( $meta['url'] ), $meta['quote_source'] ) :
    1886                                                         $meta['quote_source']
    1887                                         );
    1888                                 }
    1889                         }
    1890                         break;
    1891 
    1892                 case 'image':
    1893                         if ( ! empty( $meta['image'] ) ) {
    1894                                 $image = is_numeric( $meta['image'] ) ? wp_get_attachment_url( $meta['image'] ) : $meta['image'];
    1895 
    1896                                 if ( ! empty( $image ) && ! stristr( $content, $image ) ) {
    1897                                         $image_html = sprintf(
    1898                                                 '<img %ssrc="%s" alt="" />',
    1899                                                 empty( $compat['image_class'] ) ? '' : sprintf( 'class="%s" ', esc_attr( $compat['image_class'] ) ),
    1900                                                 $image
    1901                                         );
    1902                                         if ( empty( $meta['url'] ) ) {
    1903                                                 $format_output .= $image_html;
    1904                                         } else {
    1905                                                 $format_output .= sprintf(
    1906                                                         '<a href="%s">%s</a>',
    1907                                                         esc_url( $meta['url'] ),
    1908                                                         $image_html
    1909                                                 );
    1910                                         }
    1911                                 }
    1912                         }
    1913                         break;
    1914 
    1915                 case 'gallery':
    1916                         preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches );
    1917                         if ( ! empty( $matches ) && isset( $matches[2] ) ) {
    1918                                 foreach ( (array) $matches[2] as $match ) {
    1919                                         if ( 'gallery' === $match )
    1920                                                 break 2; // foreach + case
    1921                                 }
    1922                         }
    1923 
    1924                         if ( empty( $meta['gallery'] ) && ! empty( $compat['gallery'] ) ) {
    1925                                 $format_output .= $compat['gallery'];
    1926                         } elseif ( ! empty( $meta['gallery'] ) ) {
    1927                                 $format_output .= $meta['gallery'];
    1928                         }
    1929                         break;
    1930 
    1931                 case 'video':
    1932                 case 'audio':
    1933                         $shortcode_regex = '/' . get_shortcode_regex() . '/s';
    1934                         $matches = preg_match( $shortcode_regex, $content );
    1935                         if ( ! $matches || $format !== $matches[2] ) {
    1936                                 if ( empty( $meta['media'] ) && ! empty( $compat[$format] ) ) {
    1937                                         $format_output .= $compat[$format];
    1938                                 } elseif ( ! empty( $meta['media'] ) ) {
    1939                                         // the metadata is a shortcode or an embed code
    1940                                         if ( preg_match( $shortcode_regex, $meta['media'] ) || preg_match( '#<[^>]+>#', $meta['media'] ) ) {
    1941                                                 $format_output .= $meta['media'];
    1942                                         } elseif ( ! stristr( $content, $meta['media'] ) ) {
    1943                                                 // attempt to embed the URL
    1944                                                 $format_output .= sprintf( '[embed]%s[/embed]', $meta['media'] );
    1945                                         }
    1946                                 }
    1947                         }
    1948                         break;
    1949                 default:
    1950                         return $content;
    1951                         break;
    1952         }
    1953 
    1954         if ( empty( $format_output ) )
    1955                 return $content;
    1956 
    1957         $output = '';
    1958 
    1959         if ( ! empty( $content ) && $show_content && 'before' !== $compat['position'] )
    1960                 $output .= $content . PHP_EOL . PHP_EOL;
    1961 
    1962         if ( ! empty( $compat['tag'] ) )
    1963                 $output .= sprintf( '<%s class="%s">', tag_escape( $compat['tag'] ), esc_attr( $compat['class'] ) );
    1964 
    1965         $output .= $format_output;
    1966 
    1967         if ( ! empty( $compat['tag'] ) )
    1968                 $output .= sprintf( '</%s>', tag_escape( $compat['tag'] ) );
    1969 
    1970         if ( ! empty( $content ) && $show_content && 'before' === $compat['position'] )
    1971                 $output .= PHP_EOL . PHP_EOL . $content;
    1972 
    19731798        return $output;
    19741799}
     
    35323357 */
    35333358function wp_slash( $value ) {
    3534         if ( is_array( $value ) ) { 
     3359        if ( is_array( $value ) ) {
    35353360                foreach ( $value as $k => $v ) {
    35363361                        if ( is_array( $v ) ) {
     
    35413366                }
    35423367        } else {
    3543                 $value = addslashes( $value ); 
    3544         } 
    3545 
    3546         return $value; 
     3368                $value = addslashes( $value );
     3369        }
     3370
     3371        return $value;
    35473372}
    35483373
     
    35633388 */
    35643389function wp_unslash( $value ) {
    3565         return stripslashes_deep( $value ); 
    3566 }
     3390        return stripslashes_deep( $value );
     3391}
  • trunk/wp-includes/post-formats.php

    r23465 r23466  
    11<?php
    22/**
    3  * Post functions and post utility function.
     3 * Post format functions.
    44 *
    55 * @package WordPress
    66 * @subpackage Post
    7  * @since 1.5.0
    8  */
    9 
    10 //
    11 // Post Type Registration
    12 //
    13 
    14 /**
    15  * Creates the initial post types when 'init' action is fired.
    16  *
    17  * @since 2.9.0
    18  */
    19 function create_initial_post_types() {
    20         register_post_type( 'post', array(
    21                 'labels' => array(
    22                         'name_admin_bar' => _x( 'Post', 'add new on admin bar' ),
    23                 ),
    24                 'public'  => true,
    25                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    26                 '_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
    27                 'capability_type' => 'post',
    28                 'map_meta_cap' => true,
    29                 'hierarchical' => false,
    30                 'rewrite' => false,
    31                 'query_var' => false,
    32                 'delete_with_user' => true,
    33                 'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'post-formats' ),
    34         ) );
    35 
    36         register_post_type( 'page', array(
    37                 'labels' => array(
    38                         'name_admin_bar' => _x( 'Page', 'add new on admin bar' ),
    39                 ),
    40                 'public' => true,
    41                 'publicly_queryable' => false,
    42                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    43                 '_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
    44                 'capability_type' => 'page',
    45                 'map_meta_cap' => true,
    46                 'hierarchical' => true,
    47                 'rewrite' => false,
    48                 'query_var' => false,
    49                 'delete_with_user' => true,
    50                 'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'page-attributes', 'custom-fields', 'comments', 'revisions' ),
    51         ) );
    52 
    53         register_post_type( 'attachment', array(
    54                 'labels' => array(
    55                         'name' => _x('Media', 'post type general name'),
    56                         'name_admin_bar' => _x( 'Media', 'add new from admin bar' ),
    57                         'add_new' => _x( 'Add New', 'add new media' ),
    58                         'edit_item' => __( 'Edit Media' ),
    59                         'view_item' => __( 'View Attachment Page' ),
    60                 ),
    61                 'public' => true,
    62                 'show_ui' => true,
    63                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    64                 '_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
    65                 'capability_type' => 'post',
    66                 'capabilities' => array(
    67                         'create_posts' => 'upload_files',
    68                 ),
    69                 'map_meta_cap' => true,
    70                 'hierarchical' => false,
    71                 'rewrite' => false,
    72                 'query_var' => false,
    73                 'show_in_nav_menus' => false,
    74                 'delete_with_user' => true,
    75                 'supports' => array( 'title', 'author', 'comments' ),
    76         ) );
    77 
    78         register_post_type( 'revision', array(
    79                 'labels' => array(
    80                         'name' => __( 'Revisions' ),
    81                         'singular_name' => __( 'Revision' ),
    82                 ),
    83                 'public' => false,
    84                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    85                 '_edit_link' => 'revision.php?revision=%d', /* internal use only. don't use this when registering your own post type. */
    86                 'capability_type' => 'post',
    87                 'map_meta_cap' => true,
    88                 'hierarchical' => false,
    89                 'rewrite' => false,
    90                 'query_var' => false,
    91                 'can_export' => false,
    92                 'delete_with_user' => true,
    93                 'supports' => array( 'author' ),
    94         ) );
    95 
    96         register_post_type( 'nav_menu_item', array(
    97                 'labels' => array(
    98                         'name' => __( 'Navigation Menu Items' ),
    99                         'singular_name' => __( 'Navigation Menu Item' ),
    100                 ),
    101                 'public' => false,
    102                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    103                 'hierarchical' => false,
    104                 'rewrite' => false,
    105                 'delete_with_user' => false,
    106                 'query_var' => false,
    107         ) );
    108 
    109         register_post_status( 'publish', array(
    110                 'label'       => _x( 'Published', 'post' ),
    111                 'public'      => true,
    112                 '_builtin'    => true, /* internal use only. */
    113                 'label_count' => _n_noop( 'Published <span class="count">(%s)</span>', 'Published <span class="count">(%s)</span>' ),
    114         ) );
    115 
    116         register_post_status( 'future', array(
    117                 'label'       => _x( 'Scheduled', 'post' ),
    118                 'protected'   => true,
    119                 '_builtin'    => true, /* internal use only. */
    120                 'label_count' => _n_noop('Scheduled <span class="count">(%s)</span>', 'Scheduled <span class="count">(%s)</span>' ),
    121         ) );
    122 
    123         register_post_status( 'draft', array(
    124                 'label'       => _x( 'Draft', 'post' ),
    125                 'protected'   => true,
    126                 '_builtin'    => true, /* internal use only. */
    127                 'label_count' => _n_noop( 'Draft <span class="count">(%s)</span>', 'Drafts <span class="count">(%s)</span>' ),
    128         ) );
    129 
    130         register_post_status( 'pending', array(
    131                 'label'       => _x( 'Pending', 'post' ),
    132                 'protected'   => true,
    133                 '_builtin'    => true, /* internal use only. */
    134                 'label_count' => _n_noop( 'Pending <span class="count">(%s)</span>', 'Pending <span class="count">(%s)</span>' ),
    135         ) );
    136 
    137         register_post_status( 'private', array(
    138                 'label'       => _x( 'Private', 'post' ),
    139                 'private'     => true,
    140                 '_builtin'    => true, /* internal use only. */
    141                 'label_count' => _n_noop( 'Private <span class="count">(%s)</span>', 'Private <span class="count">(%s)</span>' ),
    142         ) );
    143 
    144         register_post_status( 'trash', array(
    145                 'label'       => _x( 'Trash', 'post' ),
    146                 'internal'    => true,
    147                 '_builtin'    => true, /* internal use only. */
    148                 'label_count' => _n_noop( 'Trash <span class="count">(%s)</span>', 'Trash <span class="count">(%s)</span>' ),
    149                 'show_in_admin_status_list' => true,
    150         ) );
    151 
    152         register_post_status( 'auto-draft', array(
    153                 'label'    => 'auto-draft',
    154                 'internal' => true,
    155                 '_builtin' => true, /* internal use only. */
    156         ) );
    157 
    158         register_post_status( 'inherit', array(
    159                 'label'    => 'inherit',
    160                 'internal' => true,
    161                 '_builtin' => true, /* internal use only. */
    162                 'exclude_from_search' => false,
    163         ) );
    164 }
    165 add_action( 'init', 'create_initial_post_types', 0 ); // highest priority
    166 
    167 /**
    168  * Retrieve attached file path based on attachment ID.
    169  *
    170  * You can optionally send it through the 'get_attached_file' filter, but by
    171  * default it will just return the file path unfiltered.
    172  *
    173  * The function works by getting the single post meta name, named
    174  * '_wp_attached_file' and returning it. This is a convenience function to
    175  * prevent looking up the meta name and provide a mechanism for sending the
    176  * attached filename through a filter.
    177  *
    178  * @since 2.0.0
    179  * @uses apply_filters() Calls 'get_attached_file' on file path and attachment ID.
    180  *
    181  * @param int $attachment_id Attachment ID.
    182  * @param bool $unfiltered Whether to apply filters.
    183  * @return string|bool The file path to the attached file, or false if the attachment does not exist.
    184  */
    185 function get_attached_file( $attachment_id, $unfiltered = false ) {
    186         $file = get_post_meta( $attachment_id, '_wp_attached_file', true );
    187         // If the file is relative, prepend upload dir
    188         if ( $file && 0 !== strpos($file, '/') && !preg_match('|^.:\\\|', $file) && ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) )
    189                 $file = $uploads['basedir'] . "/$file";
    190         if ( $unfiltered )
    191                 return $file;
    192         return apply_filters( 'get_attached_file', $file, $attachment_id );
    193 }
    194 
    195 /**
    196  * Update attachment file path based on attachment ID.
    197  *
    198  * Used to update the file path of the attachment, which uses post meta name
    199  * '_wp_attached_file' to store the path of the attachment.
    200  *
    201  * @since 2.1.0
    202  * @uses apply_filters() Calls 'update_attached_file' on file path and attachment ID.
    203  *
    204  * @param int $attachment_id Attachment ID
    205  * @param string $file File path for the attachment
    206  * @return bool False on failure, true on success.
    207  */
    208 function update_attached_file( $attachment_id, $file ) {
    209         if ( !get_post( $attachment_id ) )
    210                 return false;
    211 
    212         $file = apply_filters( 'update_attached_file', $file, $attachment_id );
    213         if ( $file = _wp_relative_upload_path( $file ) )
    214                 return update_post_meta( $attachment_id, '_wp_attached_file', $file );
    215         else
    216                 return delete_post_meta( $attachment_id, '_wp_attached_file' );
    217 }
    218 
    219 /**
    220  * Return relative path to an uploaded file.
    221  *
    222  * The path is relative to the current upload dir.
    223  *
    224  * @since 2.9.0
    225  * @uses apply_filters() Calls '_wp_relative_upload_path' on file path.
    226  *
    227  * @param string $path Full path to the file
    228  * @return string relative path on success, unchanged path on failure.
    229  */
    230 function _wp_relative_upload_path( $path ) {
    231         $new_path = $path;
    232 
    233         $uploads = wp_upload_dir();
    234         if ( 0 === strpos( $new_path, $uploads['basedir'] ) ) {
    235                         $new_path = str_replace( $uploads['basedir'], '', $new_path );
    236                         $new_path = ltrim( $new_path, '/' );
    237         }
    238 
    239         return apply_filters( '_wp_relative_upload_path', $new_path, $path );
    240 }
    241 
    242 /**
    243  * Retrieve all children of the post parent ID.
    244  *
    245  * Normally, without any enhancements, the children would apply to pages. In the
    246  * context of the inner workings of WordPress, pages, posts, and attachments
    247  * share the same table, so therefore the functionality could apply to any one
    248  * of them. It is then noted that while this function does not work on posts, it
    249  * does not mean that it won't work on posts. It is recommended that you know
    250  * what context you wish to retrieve the children of.
    251  *
    252  * Attachments may also be made the child of a post, so if that is an accurate
    253  * statement (which needs to be verified), it would then be possible to get
    254  * all of the attachments for a post. Attachments have since changed since
    255  * version 2.5, so this is most likely unaccurate, but serves generally as an
    256  * example of what is possible.
    257  *
    258  * The arguments listed as defaults are for this function and also of the
    259  * {@link get_posts()} function. The arguments are combined with the
    260  * get_children defaults and are then passed to the {@link get_posts()}
    261  * function, which accepts additional arguments. You can replace the defaults in
    262  * this function, listed below and the additional arguments listed in the
    263  * {@link get_posts()} function.
    264  *
    265  * The 'post_parent' is the most important argument and important attention
    266  * needs to be paid to the $args parameter. If you pass either an object or an
    267  * integer (number), then just the 'post_parent' is grabbed and everything else
    268  * is lost. If you don't specify any arguments, then it is assumed that you are
    269  * in The Loop and the post parent will be grabbed for from the current post.
    270  *
    271  * The 'post_parent' argument is the ID to get the children. The 'numberposts'
    272  * is the amount of posts to retrieve that has a default of '-1', which is
    273  * used to get all of the posts. Giving a number higher than 0 will only
    274  * retrieve that amount of posts.
    275  *
    276  * The 'post_type' and 'post_status' arguments can be used to choose what
    277  * criteria of posts to retrieve. The 'post_type' can be anything, but WordPress
    278  * post types are 'post', 'pages', and 'attachments'. The 'post_status'
    279  * argument will accept any post status within the write administration panels.
    280  *
    281  * @see get_posts() Has additional arguments that can be replaced.
    282  * @internal Claims made in the long description might be inaccurate.
    283  *
    284  * @since 2.0.0
    285  *
    286  * @param mixed $args Optional. User defined arguments for replacing the defaults.
    287  * @param string $output Optional. Constant for return type, either OBJECT (default), ARRAY_A, ARRAY_N.
    288  * @return array|bool False on failure and the type will be determined by $output parameter.
    289  */
    290 function get_children($args = '', $output = OBJECT) {
    291         $kids = array();
    292         if ( empty( $args ) ) {
    293                 if ( isset( $GLOBALS['post'] ) ) {
    294                         $args = array('post_parent' => (int) $GLOBALS['post']->post_parent );
    295                 } else {
    296                         return $kids;
    297                 }
    298         } elseif ( is_object( $args ) ) {
    299                 $args = array('post_parent' => (int) $args->post_parent );
    300         } elseif ( is_numeric( $args ) ) {
    301                 $args = array('post_parent' => (int) $args);
    302         }
    303 
    304         $defaults = array(
    305                 'numberposts' => -1, 'post_type' => 'any',
    306                 'post_status' => 'any', 'post_parent' => 0,
    307         );
    308 
    309         $r = wp_parse_args( $args, $defaults );
    310 
    311         $children = get_posts( $r );
    312 
    313         if ( !$children )
    314                 return $kids;
    315 
    316         update_post_cache($children);
    317 
    318         foreach ( $children as $key => $child )
    319                 $kids[$child->ID] = $children[$key];
    320 
    321         if ( $output == OBJECT ) {
    322                 return $kids;
    323         } elseif ( $output == ARRAY_A ) {
    324                 foreach ( (array) $kids as $kid )
    325                         $weeuns[$kid->ID] = get_object_vars($kids[$kid->ID]);
    326                 return $weeuns;
    327         } elseif ( $output == ARRAY_N ) {
    328                 foreach ( (array) $kids as $kid )
    329                         $babes[$kid->ID] = array_values(get_object_vars($kids[$kid->ID]));
    330                 return $babes;
    331         } else {
    332                 return $kids;
    333         }
    334 }
    335 
    336 /**
    337  * Get extended entry info (<!--more-->).
    338  *
    339  * There should not be any space after the second dash and before the word
    340  * 'more'. There can be text or space(s) after the word 'more', but won't be
    341  * referenced.
    342  *
    343  * The returned array has 'main', 'extended', and 'more_text' keys. Main has the text before
    344  * the <code><!--more--></code>. The 'extended' key has the content after the
    345  * <code><!--more--></code> comment. The 'more_text' key has the custom "Read More" text.
    346  *
    347  * @since 1.0.0
    348  *
    349  * @param string $post Post content.
    350  * @return array Post before ('main'), after ('extended'), and custom readmore ('more_text').
    351  */
    352 function get_extended($post) {
    353         //Match the new style more links
    354         if ( preg_match('/<!--more(.*?)?-->/', $post, $matches) ) {
    355                 list($main, $extended) = explode($matches[0], $post, 2);
    356                 $more_text = $matches[1];
    357         } else {
    358                 $main = $post;
    359                 $extended = '';
    360                 $more_text = '';
    361         }
    362 
    363         // Strip leading and trailing whitespace
    364         $main = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $main);
    365         $extended = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $extended);
    366         $more_text = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $more_text);
    367 
    368         return array( 'main' => $main, 'extended' => $extended, 'more_text' => $more_text );
    369 }
    370 
    371 /**
    372  * Retrieves post data given a post ID or post object.
    373  *
    374  * See {@link sanitize_post()} for optional $filter values. Also, the parameter
    375  * $post, must be given as a variable, since it is passed by reference.
    376  *
    377  * @since 1.5.1
    378  * @uses $wpdb
    379  * @link http://codex.wordpress.org/Function_Reference/get_post
    380  *
    381  * @param int|object $post Post ID or post object. Optional, default is the current post from the loop.
    382  * @param string $output Optional, default is Object. Either OBJECT, ARRAY_A, or ARRAY_N.
    383  * @param string $filter Optional, default is raw.
    384  * @return WP_Post|null WP_Post on success or null on failure
    385  */
    386 function get_post( $post = null, $output = OBJECT, $filter = 'raw' ) {
    387         if ( empty( $post ) && isset( $GLOBALS['post'] ) )
    388                 $post = $GLOBALS['post'];
    389 
    390         if ( is_a( $post, 'WP_Post' ) ) {
    391                 $_post = $post;
    392         } elseif ( is_object( $post ) ) {
    393                 if ( empty( $post->filter ) ) {
    394                         $_post = sanitize_post( $post, 'raw' );
    395                         $_post = new WP_Post( $_post );
    396                 } elseif ( 'raw' == $post->filter ) {
    397                         $_post = new WP_Post( $post );
    398                 } else {
    399                         $_post = WP_Post::get_instance( $post->ID );
    400                 }
    401         } else {
    402                 $_post = WP_Post::get_instance( $post );
    403         }
    404 
    405         if ( ! $_post )
    406                 return null;
    407 
    408         $_post = $_post->filter( $filter );
    409 
    410         if ( $output == ARRAY_A )
    411                 return $_post->to_array();
    412         elseif ( $output == ARRAY_N )
    413                 return array_values( $_post->to_array() );
    414 
    415         return $_post;
    416 }
    417 
    418 /**
    419  * WordPress Post class.
    420  *
    421  * @since 3.5.0
    422  *
    423  */
    424 final class WP_Post {
    425 
    426         /**
    427          *
    428          * @var int
    429          */
    430         public $ID;
    431 
    432         /**
    433          *
    434          * @var int
    435          */
    436         public $post_author = 0;
    437 
    438         /**
    439          *
    440          * @var string
    441          */
    442         public $post_date = '0000-00-00 00:00:00';
    443 
    444         /**
    445          *
    446          * @var string
    447          */
    448         public $post_date_gmt = '0000-00-00 00:00:00';
    449 
    450         /**
    451          *
    452          * @var string
    453          */
    454         public $post_content = '';
    455 
    456         /**
    457          *
    458          * @var string
    459          */
    460         public $post_title = '';
    461 
    462         /**
    463          *
    464          * @var string
    465          */
    466         public $post_excerpt = '';
    467 
    468         /**
    469          *
    470          * @var string
    471          */
    472         public $post_status = 'publish';
    473 
    474         /**
    475          *
    476          * @var string
    477          */
    478         public $comment_status = 'open';
    479 
    480         /**
    481          *
    482          * @var string
    483          */
    484         public $ping_status = 'open';
    485 
    486         /**
    487          *
    488          * @var string
    489          */
    490         public $post_password = '';
    491 
    492         /**
    493          *
    494          * @var string
    495          */
    496         public $post_name = '';
    497 
    498         /**
    499          *
    500          * @var string
    501          */
    502         public $to_ping = '';
    503 
    504         /**
    505          *
    506          * @var string
    507          */
    508         public $pinged = '';
    509 
    510         /**
    511          *
    512          * @var string
    513          */
    514         public $post_modified = '0000-00-00 00:00:00';
    515 
    516         /**
    517          *
    518          * @var string
    519          */
    520         public $post_modified_gmt = '0000-00-00 00:00:00';
    521 
    522         /**
    523          *
    524          * @var string
    525          */
    526         public $post_content_filtered = '';
    527 
    528         /**
    529          *
    530          * @var int
    531          */
    532         public $post_parent = 0;
    533 
    534         /**
    535          *
    536          * @var string
    537          */
    538         public $guid = '';
    539 
    540         /**
    541          *
    542          * @var int
    543          */
    544         public $menu_order = 0;
    545 
    546         /**
    547          *
    548          * @var string
    549          */
    550         public $post_type = 'post';
    551 
    552         /**
    553          *
    554          * @var string
    555          */
    556         public $post_mime_type = '';
    557 
    558         /**
    559          *
    560          * @var int
    561          */
    562         public $comment_count = 0;
    563 
    564         /**
    565          *
    566          * @var string
    567          */
    568         public $filter;
    569 
    570         public static function get_instance( $post_id ) {
    571                 global $wpdb;
    572 
    573                 $post_id = (int) $post_id;
    574                 if ( ! $post_id )
    575                         return false;
    576 
    577                 $_post = wp_cache_get( $post_id, 'posts' );
    578 
    579                 if ( ! $_post ) {
    580                         $_post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post_id ) );
    581 
    582                         if ( ! $_post )
    583                                 return false;
    584 
    585                         $_post = sanitize_post( $_post, 'raw' );
    586                         wp_cache_add( $_post->ID, $_post, 'posts' );
    587                 } elseif ( empty( $_post->filter ) ) {
    588                         $_post = sanitize_post( $_post, 'raw' );
    589                 }
    590 
    591                 return new WP_Post( $_post );
    592         }
    593 
    594         public function __construct( $post ) {
    595                 foreach ( get_object_vars( $post ) as $key => $value )
    596                         $this->$key = $value;
    597         }
    598 
    599         public function __isset( $key ) {
    600                 if ( 'ancestors' == $key )
    601                         return true;
    602 
    603                 if ( 'page_template' == $key )
    604                         return ( 'page' == $this->post_type );
    605 
    606                 if ( 'post_category' == $key )
    607                    return true;
    608 
    609                 if ( 'tags_input' == $key )
    610                    return true;
    611 
    612                 return metadata_exists( 'post', $this->ID, $key );
    613         }
    614 
    615         public function __get( $key ) {
    616                 if ( 'page_template' == $key && $this->__isset( $key ) ) {
    617                         return get_post_meta( $this->ID, '_wp_page_template', true );
    618                 }
    619 
    620                 if ( 'post_category' == $key ) {
    621                         if ( is_object_in_taxonomy( $this->post_type, 'category' ) )
    622                                 $terms = get_the_terms( $this, 'category' );
    623 
    624                         if ( empty( $terms ) )
    625                                 return array();
    626 
    627                         return wp_list_pluck( $terms, 'term_id' );
    628                 }
    629 
    630                 if ( 'tags_input' == $key ) {
    631                         if ( is_object_in_taxonomy( $this->post_type, 'post_tag' ) )
    632                                 $terms = get_the_terms( $this, 'post_tag' );
    633 
    634                         if ( empty( $terms ) )
    635                                 return array();
    636 
    637                         return wp_list_pluck( $terms, 'name' );
    638                 }
    639 
    640                 // Rest of the values need filtering
    641 
    642                 if ( 'ancestors' == $key )
    643                         $value = get_post_ancestors( $this );
    644                 else
    645                         $value = get_post_meta( $this->ID, $key, true );
    646 
    647                 if ( $this->filter )
    648                         $value = sanitize_post_field( $key, $value, $this->ID, $this->filter );
    649 
    650                 return $value;
    651         }
    652 
    653         public function filter( $filter ) {
    654                 if ( $this->filter == $filter )
    655                         return $this;
    656 
    657                 if ( $filter == 'raw' )
    658                         return self::get_instance( $this->ID );
    659 
    660                 return sanitize_post( $this, $filter );
    661         }
    662 
    663         public function to_array() {
    664                 $post = get_object_vars( $this );
    665 
    666                 foreach ( array( 'ancestors', 'page_template', 'post_category', 'tags_input' ) as $key ) {
    667                         if ( $this->__isset( $key ) )
    668                                 $post[ $key ] = $this->__get( $key );
    669                 }
    670 
    671                 return $post;
    672         }
    673 }
    674 
    675 /**
    676  * Retrieve ancestors of a post.
    677  *
    678  * @since 2.5.0
    679  *
    680  * @param int|object $post Post ID or post object
    681  * @return array Ancestor IDs or empty array if none are found.
    682  */
    683 function get_post_ancestors( $post ) {
    684         if ( ! $post )
    685                 return array();
    686 
    687         $post = get_post( $post );
    688 
    689         if ( empty( $post->post_parent ) || $post->post_parent == $post->ID )
    690                 return array();
    691 
    692         $ancestors = array();
    693 
    694         $id = $ancestors[] = $post->post_parent;
    695 
    696         while ( $ancestor = get_post( $id ) ) {
    697                 // Loop detection: If the ancestor has been seen before, break.
    698                 if ( empty( $ancestor->post_parent ) || ( $ancestor->post_parent == $post->ID ) || in_array( $ancestor->post_parent, $ancestors ) )
    699                         break;
    700 
    701                 $id = $ancestors[] = $ancestor->post_parent;
    702         }
    703 
    704         return $ancestors;
    705 }
    706 
    707 /**
    708  * Retrieve data from a post field based on Post ID.
    709  *
    710  * Examples of the post field will be, 'post_type', 'post_status', 'post_content',
    711  * etc and based off of the post object property or key names.
    712  *
    713  * The context values are based off of the taxonomy filter functions and
    714  * supported values are found within those functions.
    715  *
    716  * @since 2.3.0
    717  * @uses sanitize_post_field() See for possible $context values.
    718  *
    719  * @param string $field Post field name
    720  * @param id $post Post ID
    721  * @param string $context Optional. How to filter the field. Default is display.
    722  * @return bool|string False on failure or returns the value in post field
    723  */
    724 function get_post_field( $field, $post, $context = 'display' ) {
    725         $post = get_post( $post );
    726 
    727         if ( !$post )
    728                 return '';
    729 
    730         if ( !isset($post->$field) )
    731                 return '';
    732 
    733         return sanitize_post_field($field, $post->$field, $post->ID, $context);
    734 }
    735 
    736 /**
    737  * Retrieve the mime type of an attachment based on the ID.
    738  *
    739  * This function can be used with any post type, but it makes more sense with
    740  * attachments.
    741  *
    742  * @since 2.0.0
    743  *
    744  * @param int $ID Optional. Post ID.
    745  * @return bool|string False on failure or returns the mime type
    746  */
    747 function get_post_mime_type($ID = '') {
    748         $post = get_post($ID);
    749 
    750         if ( is_object($post) )
    751                 return $post->post_mime_type;
    752 
    753         return false;
    754 }
     7 */
    7558
    7569/**
     
    81770
    81871        return wp_set_post_terms($post->ID, $format, 'post_format');
    819 }
    820 
    821 /**
    822  * Retrieve the post status based on the Post ID.
    823  *
    824  * If the post ID is of an attachment, then the parent post status will be given
    825  * instead.
    826  *
    827  * @since 2.0.0
    828  *
    829  * @param int $ID Post ID
    830  * @return string|bool Post status or false on failure.
    831  */
    832 function get_post_status($ID = '') {
    833         $post = get_post($ID);
    834 
    835         if ( !is_object($post) )
    836                 return false;
    837 
    838         if ( 'attachment' == $post->post_type ) {
    839                 if ( 'private' == $post->post_status )
    840                         return 'private';
    841 
    842                 // Unattached attachments are assumed to be published
    843                 if ( ( 'inherit' == $post->post_status ) && ( 0 == $post->post_parent) )
    844                         return 'publish';
    845 
    846                 // Inherit status from the parent
    847                 if ( $post->post_parent && ( $post->ID != $post->post_parent ) )
    848                         return get_post_status($post->post_parent);
    849         }
    850 
    851         return $post->post_status;
    852 }
    853 
    854 /**
    855  * Retrieve all of the WordPress supported post statuses.
    856  *
    857  * Posts have a limited set of valid status values, this provides the
    858  * post_status values and descriptions.
    859  *
    860  * @since 2.5.0
    861  *
    862  * @return array List of post statuses.
    863  */
    864 function get_post_statuses() {
    865         $status = array(
    866                 'draft'                 => __('Draft'),
    867                 'pending'               => __('Pending Review'),
    868                 'private'               => __('Private'),
    869                 'publish'               => __('Published')
    870         );
    871 
    872         return $status;
    873 }
    874 
    875 /**
    876  * Retrieve all of the WordPress support page statuses.
    877  *
    878  * Pages have a limited set of valid status values, this provides the
    879  * post_status values and descriptions.
    880  *
    881  * @since 2.5.0
    882  *
    883  * @return array List of page statuses.
    884  */
    885 function get_page_statuses() {
    886         $status = array(
    887                 'draft'                 => __('Draft'),
    888                 'private'               => __('Private'),
    889                 'publish'               => __('Published')
    890         );
    891 
    892         return $status;
    893 }
    894 
    895 /**
    896  * Register a post status. Do not use before init.
    897  *
    898  * A simple function for creating or modifying a post status based on the
    899  * parameters given. The function will accept an array (second optional
    900  * parameter), along with a string for the post status name.
    901  *
    902  *
    903  * Optional $args contents:
    904  *
    905  * label - A descriptive name for the post status marked for translation. Defaults to $post_status.
    906  * public - Whether posts of this status should be shown in the front end of the site. Defaults to true.
    907  * exclude_from_search - Whether to exclude posts with this post status from search results. Defaults to false.
    908  * show_in_admin_all_list - Whether to include posts in the edit listing for their post type
    909  * show_in_admin_status_list - Show in the list of statuses with post counts at the top of the edit
    910  *                             listings, e.g. All (12) | Published (9) | My Custom Status (2) ...
    911  *
    912  * Arguments prefixed with an _underscore shouldn't be used by plugins and themes.
    913  *
    914  * @package WordPress
    915  * @subpackage Post
    916  * @since 3.0.0
    917  * @uses $wp_post_statuses Inserts new post status object into the list
    918  *
    919  * @param string $post_status Name of the post status.
    920  * @param array|string $args See above description.
    921  */
    922 function register_post_status($post_status, $args = array()) {
    923         global $wp_post_statuses;
    924 
    925         if (!is_array($wp_post_statuses))
    926                 $wp_post_statuses = array();
    927 
    928         // Args prefixed with an underscore are reserved for internal use.
    929         $defaults = array(
    930                 'label' => false,
    931                 'label_count' => false,
    932                 'exclude_from_search' => null,
    933                 '_builtin' => false,
    934                 'public' => null,
    935                 'internal' => null,
    936                 'protected' => null,
    937                 'private' => null,
    938                 'publicly_queryable' => null,
    939                 'show_in_admin_status_list' => null,
    940                 'show_in_admin_all_list' => null,
    941         );
    942         $args = wp_parse_args($args, $defaults);
    943         $args = (object) $args;
    944 
    945         $post_status = sanitize_key($post_status);
    946         $args->name = $post_status;
    947 
    948         if ( null === $args->public && null === $args->internal && null === $args->protected && null === $args->private )
    949                 $args->internal = true;
    950 
    951         if ( null === $args->public  )
    952                 $args->public = false;
    953 
    954         if ( null === $args->private  )
    955                 $args->private = false;
    956 
    957         if ( null === $args->protected  )
    958                 $args->protected = false;
    959 
    960         if ( null === $args->internal  )
    961                 $args->internal = false;
    962 
    963         if ( null === $args->publicly_queryable )
    964                 $args->publicly_queryable = $args->public;
    965 
    966         if ( null === $args->exclude_from_search )
    967                 $args->exclude_from_search = $args->internal;
    968 
    969         if ( null === $args->show_in_admin_all_list )
    970                 $args->show_in_admin_all_list = !$args->internal;
    971 
    972         if ( null === $args->show_in_admin_status_list )
    973                 $args->show_in_admin_status_list = !$args->internal;
    974 
    975         if ( false === $args->label )
    976                 $args->label = $post_status;
    977 
    978         if ( false === $args->label_count )
    979                 $args->label_count = array( $args->label, $args->label );
    980 
    981         $wp_post_statuses[$post_status] = $args;
    982 
    983         return $args;
    984 }
    985 
    986 /**
    987  * Retrieve a post status object by name
    988  *
    989  * @package WordPress
    990  * @subpackage Post
    991  * @since 3.0.0
    992  * @uses $wp_post_statuses
    993  * @see register_post_status
    994  * @see get_post_statuses
    995  *
    996  * @param string $post_status The name of a registered post status
    997  * @return object A post status object
    998  */
    999 function get_post_status_object( $post_status ) {
    1000         global $wp_post_statuses;
    1001 
    1002         if ( empty($wp_post_statuses[$post_status]) )
    1003                 return null;
    1004 
    1005         return $wp_post_statuses[$post_status];
    1006 }
    1007 
    1008 /**
    1009  * Get a list of all registered post status objects.
    1010  *
    1011  * @package WordPress
    1012  * @subpackage Post
    1013  * @since 3.0.0
    1014  * @uses $wp_post_statuses
    1015  * @see register_post_status
    1016  * @see get_post_status_object
    1017  *
    1018  * @param array|string $args An array of key => value arguments to match against the post status objects.
    1019  * @param string $output The type of output to return, either post status 'names' or 'objects'. 'names' is the default.
    1020  * @param string $operator The logical operation to perform. 'or' means only one element
    1021  *  from the array needs to match; 'and' means all elements must match. The default is 'and'.
    1022  * @return array A list of post status names or objects
    1023  */
    1024 function get_post_stati( $args = array(), $output = 'names', $operator = 'and' ) {
    1025         global $wp_post_statuses;
    1026 
    1027         $field = ('names' == $output) ? 'name' : false;
    1028 
    1029         return wp_filter_object_list($wp_post_statuses, $args, $operator, $field);
    1030 }
    1031 
    1032 /**
    1033  * Whether the post type is hierarchical.
    1034  *
    1035  * A false return value might also mean that the post type does not exist.
    1036  *
    1037  * @since 3.0.0
    1038  * @see get_post_type_object
    1039  *
    1040  * @param string $post_type Post type name
    1041  * @return bool Whether post type is hierarchical.
    1042  */
    1043 function is_post_type_hierarchical( $post_type ) {
    1044         if ( ! post_type_exists( $post_type ) )
    1045                 return false;
    1046 
    1047         $post_type = get_post_type_object( $post_type );
    1048         return $post_type->hierarchical;
    1049 }
    1050 
    1051 /**
    1052  * Checks if a post type is registered.
    1053  *
    1054  * @since 3.0.0
    1055  * @uses get_post_type_object()
    1056  *
    1057  * @param string $post_type Post type name
    1058  * @return bool Whether post type is registered.
    1059  */
    1060 function post_type_exists( $post_type ) {
    1061         return (bool) get_post_type_object( $post_type );
    1062 }
    1063 
    1064 /**
    1065  * Retrieve the post type of the current post or of a given post.
    1066  *
    1067  * @since 2.1.0
    1068  *
    1069  * @uses $post The Loop current post global
    1070  *
    1071  * @param mixed $post Optional. Post object or post ID.
    1072  * @return bool|string post type or false on failure.
    1073  */
    1074 function get_post_type( $post = null ) {
    1075         if ( $post = get_post( $post ) )
    1076                 return $post->post_type;
    1077 
    1078         return false;
    1079 }
    1080 
    1081 /**
    1082  * Retrieve a post type object by name
    1083  *
    1084  * @package WordPress
    1085  * @subpackage Post
    1086  * @since 3.0.0
    1087  * @uses $wp_post_types
    1088  * @see register_post_type
    1089  * @see get_post_types
    1090  *
    1091  * @param string $post_type The name of a registered post type
    1092  * @return object A post type object
    1093  */
    1094 function get_post_type_object( $post_type ) {
    1095         global $wp_post_types;
    1096 
    1097         if ( empty($wp_post_types[$post_type]) )
    1098                 return null;
    1099 
    1100         return $wp_post_types[$post_type];
    1101 }
    1102 
    1103 /**
    1104  * Get a list of all registered post type objects.
    1105  *
    1106  * @package WordPress
    1107  * @subpackage Post
    1108  * @since 2.9.0
    1109  * @uses $wp_post_types
    1110  * @see register_post_type
    1111  *
    1112  * @param array|string $args An array of key => value arguments to match against the post type objects.
    1113  * @param string $output The type of output to return, either post type 'names' or 'objects'. 'names' is the default.
    1114  * @param string $operator The logical operation to perform. 'or' means only one element
    1115  *  from the array needs to match; 'and' means all elements must match. The default is 'and'.
    1116  * @return array A list of post type names or objects
    1117  */
    1118 function get_post_types( $args = array(), $output = 'names', $operator = 'and' ) {
    1119         global $wp_post_types;
    1120 
    1121         $field = ('names' == $output) ? 'name' : false;
    1122 
    1123         return wp_filter_object_list($wp_post_types, $args, $operator, $field);
    1124 }
    1125 
    1126 /**
    1127  * Register a post type. Do not use before init.
    1128  *
    1129  * A function for creating or modifying a post type based on the
    1130  * parameters given. The function will accept an array (second optional
    1131  * parameter), along with a string for the post type name.
    1132  *
    1133  * Optional $args contents:
    1134  *
    1135  * - label - Name of the post type shown in the menu. Usually plural. If not set, labels['name'] will be used.
    1136  * - labels - An array of labels for this post type.
    1137  *     * If not set, post labels are inherited for non-hierarchical types and page labels for hierarchical ones.
    1138  *     * You can see accepted values in {@link get_post_type_labels()}.
    1139  * - description - A short descriptive summary of what the post type is. Defaults to blank.
    1140  * - public - Whether a post type is intended for use publicly either via the admin interface or by front-end users.
    1141  *     * Defaults to false.
    1142  *     * While the default settings of exclude_from_search, publicly_queryable, show_ui, and show_in_nav_menus are
    1143  *       inherited from public, each does not rely on this relationship and controls a very specific intention.
    1144  * - exclude_from_search - Whether to exclude posts with this post type from front end search results.
    1145  *     * If not set, the the opposite of public's current value is used.
    1146  * - publicly_queryable - Whether queries can be performed on the front end for the post type as part of parse_request().
    1147  *     * ?post_type={post_type_key}
    1148  *     * ?{post_type_key}={single_post_slug}
    1149  *     * ?{post_type_query_var}={single_post_slug}
    1150  *     * If not set, the default is inherited from public.
    1151  * - show_ui - Whether to generate a default UI for managing this post type in the admin.
    1152  *     * If not set, the default is inherited from public.
    1153  * - show_in_nav_menus - Makes this post type available for selection in navigation menus.
    1154  *     * If not set, the default is inherited from public.
    1155  * - show_in_menu - Where to show the post type in the admin menu.
    1156  *     * If true, the post type is shown in its own top level menu.
    1157  *     * If false, no menu is shown
    1158  *     * If a string of an existing top level menu (eg. 'tools.php' or 'edit.php?post_type=page'), the post type will
    1159  *       be placed as a sub menu of that.
    1160  *     * show_ui must be true.
    1161  *     * If not set, the default is inherited from show_ui
    1162  * - show_in_admin_bar - Makes this post type available via the admin bar.
    1163  *     * If not set, the default is inherited from show_in_menu
    1164  * - menu_position - The position in the menu order the post type should appear.
    1165  *     * show_in_menu must be true
    1166  *     * Defaults to null, which places it at the bottom of its area.
    1167  * - menu_icon - The url to the icon to be used for this menu. Defaults to use the posts icon.
    1168  * - capability_type - The string to use to build the read, edit, and delete capabilities. Defaults to 'post'.
    1169  *     * May be passed as an array to allow for alternative plurals when using this argument as a base to construct the
    1170  *       capabilities, e.g. array('story', 'stories').
    1171  * - capabilities - Array of capabilities for this post type.
    1172  *     * By default the capability_type is used as a base to construct capabilities.
    1173  *     * You can see accepted values in {@link get_post_type_capabilities()}.
    1174  * - map_meta_cap - Whether to use the internal default meta capability handling. Defaults to false.
    1175  * - hierarchical - Whether the post type is hierarchical (e.g. page). Defaults to false.
    1176  * - supports - An alias for calling add_post_type_support() directly. Defaults to title and editor.
    1177  *     * See {@link add_post_type_support()} for documentation.
    1178  * - register_meta_box_cb - Provide a callback function that will be called when setting up the
    1179  *     meta boxes for the edit form. Do remove_meta_box() and add_meta_box() calls in the callback.
    1180  * - taxonomies - An array of taxonomy identifiers that will be registered for the post type.
    1181  *     * Default is no taxonomies.
    1182  *     * Taxonomies can be registered later with register_taxonomy() or register_taxonomy_for_object_type().
    1183  * - has_archive - True to enable post type archives. Default is false.
    1184  *     * Will generate the proper rewrite rules if rewrite is enabled.
    1185  * - rewrite - Triggers the handling of rewrites for this post type. Defaults to true, using $post_type as slug.
    1186  *     * To prevent rewrite, set to false.
    1187  *     * To specify rewrite rules, an array can be passed with any of these keys
    1188  *         * 'slug' => string Customize the permastruct slug. Defaults to $post_type key
    1189  *         * 'with_front' => bool Should the permastruct be prepended with WP_Rewrite::$front. Defaults to true.
    1190  *         * 'feeds' => bool Should a feed permastruct be built for this post type. Inherits default from has_archive.
    1191  *         * 'pages' => bool Should the permastruct provide for pagination. Defaults to true.
    1192  *         * 'ep_mask' => const Assign an endpoint mask.
    1193  *             * If not specified and permalink_epmask is set, inherits from permalink_epmask.
    1194  *             * If not specified and permalink_epmask is not set, defaults to EP_PERMALINK
    1195  * - query_var - Sets the query_var key for this post type. Defaults to $post_type key
    1196  *     * If false, a post type cannot be loaded at ?{query_var}={post_slug}
    1197  *     * If specified as a string, the query ?{query_var_string}={post_slug} will be valid.
    1198  * - can_export - Allows this post type to be exported. Defaults to true.
    1199  * - delete_with_user - Whether to delete posts of this type when deleting a user.
    1200  *     * If true, posts of this type belonging to the user will be moved to trash when then user is deleted.
    1201  *     * If false, posts of this type belonging to the user will *not* be trashed or deleted.
    1202  *     * If not set (the default), posts are trashed if post_type_supports('author'). Otherwise posts are not trashed or deleted.
    1203  * - _builtin - true if this post type is a native or "built-in" post_type. THIS IS FOR INTERNAL USE ONLY!
    1204  * - _edit_link - URL segement to use for edit link of this post type. THIS IS FOR INTERNAL USE ONLY!
    1205  *
    1206  * @since 2.9.0
    1207  * @uses $wp_post_types Inserts new post type object into the list
    1208  *
    1209  * @param string $post_type Post type key, must not exceed 20 characters
    1210  * @param array|string $args See optional args description above.
    1211  * @return object|WP_Error the registered post type object, or an error object
    1212  */
    1213 function register_post_type( $post_type, $args = array() ) {
    1214         global $wp_post_types, $wp_rewrite, $wp;
    1215 
    1216         if ( !is_array($wp_post_types) )
    1217                 $wp_post_types = array();
    1218 
    1219         // Args prefixed with an underscore are reserved for internal use.
    1220         $defaults = array(
    1221                 'labels' => array(), 'description' => '', 'publicly_queryable' => null, 'exclude_from_search' => null,
    1222                 'capability_type' => 'post', 'capabilities' => array(), 'map_meta_cap' => null,
    1223                 '_builtin' => false, '_edit_link' => 'post.php?post=%d', 'hierarchical' => false,
    1224                 'public' => false, 'rewrite' => true, 'has_archive' => false, 'query_var' => true,
    1225                 'supports' => array(), 'register_meta_box_cb' => null,
    1226                 'taxonomies' => array(), 'show_ui' => null, 'menu_position' => null, 'menu_icon' => null,
    1227                 'can_export' => true,
    1228                 'show_in_nav_menus' => null, 'show_in_menu' => null, 'show_in_admin_bar' => null,
    1229                 'delete_with_user' => null,
    1230         );
    1231         $args = wp_parse_args($args, $defaults);
    1232         $args = (object) $args;
    1233 
    1234         $post_type = sanitize_key($post_type);
    1235         $args->name = $post_type;
    1236 
    1237         if ( strlen( $post_type ) > 20 )
    1238                         return new WP_Error( 'post_type_too_long', __( 'Post types cannot exceed 20 characters in length' ) );
    1239 
    1240         // If not set, default to the setting for public.
    1241         if ( null === $args->publicly_queryable )
    1242                 $args->publicly_queryable = $args->public;
    1243 
    1244         // If not set, default to the setting for public.
    1245         if ( null === $args->show_ui )
    1246                 $args->show_ui = $args->public;
    1247 
    1248         // If not set, default to the setting for show_ui.
    1249         if ( null === $args->show_in_menu || ! $args->show_ui )
    1250                 $args->show_in_menu = $args->show_ui;
    1251 
    1252         // If not set, default to the whether the full UI is shown.
    1253         if ( null === $args->show_in_admin_bar )
    1254                 $args->show_in_admin_bar = true === $args->show_in_menu;
    1255 
    1256         // Whether to show this type in nav-menus.php. Defaults to the setting for public.
    1257         if ( null === $args->show_in_nav_menus )
    1258                 $args->show_in_nav_menus = $args->public;
    1259 
    1260         // If not set, default to true if not public, false if public.
    1261         if ( null === $args->exclude_from_search )
    1262                 $args->exclude_from_search = !$args->public;
    1263 
    1264         // Back compat with quirky handling in version 3.0. #14122
    1265         if ( empty( $args->capabilities ) && null === $args->map_meta_cap && in_array( $args->capability_type, array( 'post', 'page' ) ) )
    1266                 $args->map_meta_cap = true;
    1267 
    1268         if ( null === $args->map_meta_cap )
    1269                 $args->map_meta_cap = false;
    1270 
    1271         $args->cap = get_post_type_capabilities( $args );
    1272         unset($args->capabilities);
    1273 
    1274         if ( is_array( $args->capability_type ) )
    1275                 $args->capability_type = $args->capability_type[0];
    1276 
    1277         if ( ! empty($args->supports) ) {
    1278                 add_post_type_support($post_type, $args->supports);
    1279                 unset($args->supports);
    1280         } elseif ( false !== $args->supports ) {
    1281                 // Add default features
    1282                 add_post_type_support($post_type, array('title', 'editor'));
    1283         }
    1284 
    1285         if ( false !== $args->query_var && !empty($wp) ) {
    1286                 if ( true === $args->query_var )
    1287                         $args->query_var = $post_type;
    1288                 else
    1289                         $args->query_var = sanitize_title_with_dashes($args->query_var);
    1290                 $wp->add_query_var($args->query_var);
    1291         }
    1292 
    1293         if ( false !== $args->rewrite && ( is_admin() || '' != get_option('permalink_structure') ) ) {
    1294                 if ( ! is_array( $args->rewrite ) )
    1295                         $args->rewrite = array();
    1296                 if ( empty( $args->rewrite['slug'] ) )
    1297                         $args->rewrite['slug'] = $post_type;
    1298                 if ( ! isset( $args->rewrite['with_front'] ) )
    1299                         $args->rewrite['with_front'] = true;
    1300                 if ( ! isset( $args->rewrite['pages'] ) )
    1301                         $args->rewrite['pages'] = true;
    1302                 if ( ! isset( $args->rewrite['feeds'] ) || ! $args->has_archive )
    1303                         $args->rewrite['feeds'] = (bool) $args->has_archive;
    1304                 if ( ! isset( $args->rewrite['ep_mask'] ) ) {
    1305                         if ( isset( $args->permalink_epmask ) )
    1306                                 $args->rewrite['ep_mask'] = $args->permalink_epmask;
    1307                         else
    1308                                 $args->rewrite['ep_mask'] = EP_PERMALINK;
    1309                 }
    1310 
    1311                 if ( $args->hierarchical )
    1312                         add_rewrite_tag("%$post_type%", '(.+?)', $args->query_var ? "{$args->query_var}=" : "post_type=$post_type&name=");
    1313                 else
    1314                         add_rewrite_tag("%$post_type%", '([^/]+)', $args->query_var ? "{$args->query_var}=" : "post_type=$post_type&name=");
    1315 
    1316                 if ( $args->has_archive ) {
    1317                         $archive_slug = $args->has_archive === true ? $args->rewrite['slug'] : $args->has_archive;
    1318                         if ( $args->rewrite['with_front'] )
    1319                                 $archive_slug = substr( $wp_rewrite->front, 1 ) . $archive_slug;
    1320                         else
    1321                                 $archive_slug = $wp_rewrite->root . $archive_slug;
    1322 
    1323                         add_rewrite_rule( "{$archive_slug}/?$", "index.php?post_type=$post_type", 'top' );
    1324                         if ( $args->rewrite['feeds'] && $wp_rewrite->feeds ) {
    1325                                 $feeds = '(' . trim( implode( '|', $wp_rewrite->feeds ) ) . ')';
    1326                                 add_rewrite_rule( "{$archive_slug}/feed/$feeds/?$", "index.php?post_type=$post_type" . '&feed=$matches[1]', 'top' );
    1327                                 add_rewrite_rule( "{$archive_slug}/$feeds/?$", "index.php?post_type=$post_type" . '&feed=$matches[1]', 'top' );
    1328                         }
    1329                         if ( $args->rewrite['pages'] )
    1330                                 add_rewrite_rule( "{$archive_slug}/{$wp_rewrite->pagination_base}/([0-9]{1,})/?$", "index.php?post_type=$post_type" . '&paged=$matches[1]', 'top' );
    1331                 }
    1332 
    1333                 add_permastruct( $post_type, "{$args->rewrite['slug']}/%$post_type%", $args->rewrite );
    1334         }
    1335 
    1336         if ( $args->register_meta_box_cb )
    1337                 add_action('add_meta_boxes_' . $post_type, $args->register_meta_box_cb, 10, 1);
    1338 
    1339         $args->labels = get_post_type_labels( $args );
    1340         $args->label = $args->labels->name;
    1341 
    1342         $wp_post_types[$post_type] = $args;
    1343 
    1344         add_action( 'future_' . $post_type, '_future_post_hook', 5, 2 );
    1345 
    1346         foreach ( $args->taxonomies as $taxonomy ) {
    1347                 register_taxonomy_for_object_type( $taxonomy, $post_type );
    1348         }
    1349 
    1350         do_action( 'registered_post_type', $post_type, $args );
    1351 
    1352         return $args;
    1353 }
    1354 
    1355 /**
    1356  * Builds an object with all post type capabilities out of a post type object
    1357  *
    1358  * Post type capabilities use the 'capability_type' argument as a base, if the
    1359  * capability is not set in the 'capabilities' argument array or if the
    1360  * 'capabilities' argument is not supplied.
    1361  *
    1362  * The capability_type argument can optionally be registered as an array, with
    1363  * the first value being singular and the second plural, e.g. array('story, 'stories')
    1364  * Otherwise, an 's' will be added to the value for the plural form. After
    1365  * registration, capability_type will always be a string of the singular value.
    1366  *
    1367  * By default, seven keys are accepted as part of the capabilities array:
    1368  *
    1369  * - edit_post, read_post, and delete_post are meta capabilities, which are then
    1370  *   generally mapped to corresponding primitive capabilities depending on the
    1371  *   context, which would be the post being edited/read/deleted and the user or
    1372  *   role being checked. Thus these capabilities would generally not be granted
    1373  *   directly to users or roles.
    1374  *
    1375  * - edit_posts - Controls whether objects of this post type can be edited.
    1376  * - edit_others_posts - Controls whether objects of this type owned by other users
    1377  *   can be edited. If the post type does not support an author, then this will
    1378  *   behave like edit_posts.
    1379  * - publish_posts - Controls publishing objects of this post type.
    1380  * - read_private_posts - Controls whether private objects can be read.
    1381  *
    1382  * These four primitive capabilities are checked in core in various locations.
    1383  * There are also seven other primitive capabilities which are not referenced
    1384  * directly in core, except in map_meta_cap(), which takes the three aforementioned
    1385  * meta capabilities and translates them into one or more primitive capabilities
    1386  * that must then be checked against the user or role, depending on the context.
    1387  *
    1388  * - read - Controls whether objects of this post type can be read.
    1389  * - delete_posts - Controls whether objects of this post type can be deleted.
    1390  * - delete_private_posts - Controls whether private objects can be deleted.
    1391  * - delete_published_posts - Controls whether published objects can be deleted.
    1392  * - delete_others_posts - Controls whether objects owned by other users can be
    1393  *   can be deleted. If the post type does not support an author, then this will
    1394  *   behave like delete_posts.
    1395  * - edit_private_posts - Controls whether private objects can be edited.
    1396  * - edit_published_posts - Controls whether published objects can be edited.
    1397  *
    1398  * These additional capabilities are only used in map_meta_cap(). Thus, they are
    1399  * only assigned by default if the post type is registered with the 'map_meta_cap'
    1400  * argument set to true (default is false).
    1401  *
    1402  * @see map_meta_cap()
    1403  * @since 3.0.0
    1404  *
    1405  * @param object $args Post type registration arguments
    1406  * @return object object with all the capabilities as member variables
    1407  */
    1408 function get_post_type_capabilities( $args ) {
    1409         if ( ! is_array( $args->capability_type ) )
    1410                 $args->capability_type = array( $args->capability_type, $args->capability_type . 's' );
    1411 
    1412         // Singular base for meta capabilities, plural base for primitive capabilities.
    1413         list( $singular_base, $plural_base ) = $args->capability_type;
    1414 
    1415         $default_capabilities = array(
    1416                 // Meta capabilities
    1417                 'edit_post'          => 'edit_'         . $singular_base,
    1418                 'read_post'          => 'read_'         . $singular_base,
    1419                 'delete_post'        => 'delete_'       . $singular_base,
    1420                 // Primitive capabilities used outside of map_meta_cap():
    1421                 'edit_posts'         => 'edit_'         . $plural_base,
    1422                 'edit_others_posts'  => 'edit_others_'  . $plural_base,
    1423                 'publish_posts'      => 'publish_'      . $plural_base,
    1424                 'read_private_posts' => 'read_private_' . $plural_base,
    1425         );
    1426 
    1427         // Primitive capabilities used within map_meta_cap():
    1428         if ( $args->map_meta_cap ) {
    1429                 $default_capabilities_for_mapping = array(
    1430                         'read'                   => 'read',
    1431                         'delete_posts'           => 'delete_'           . $plural_base,
    1432                         'delete_private_posts'   => 'delete_private_'   . $plural_base,
    1433                         'delete_published_posts' => 'delete_published_' . $plural_base,
    1434                         'delete_others_posts'    => 'delete_others_'    . $plural_base,
    1435                         'edit_private_posts'     => 'edit_private_'     . $plural_base,
    1436                         'edit_published_posts'   => 'edit_published_'   . $plural_base,
    1437                 );
    1438                 $default_capabilities = array_merge( $default_capabilities, $default_capabilities_for_mapping );
    1439         }
    1440 
    1441         $capabilities = array_merge( $default_capabilities, $args->capabilities );
    1442 
    1443         // Post creation capability simply maps to edit_posts by default:
    1444         if ( ! isset( $capabilities['create_posts'] ) )
    1445                 $capabilities['create_posts'] = $capabilities['edit_posts'];
    1446 
    1447         // Remember meta capabilities for future reference.
    1448         if ( $args->map_meta_cap )
    1449                 _post_type_meta_capabilities( $capabilities );
    1450 
    1451         return (object) $capabilities;
    1452 }
    1453 
    1454 /**
    1455  * Stores or returns a list of post type meta caps for map_meta_cap().
    1456  *
    1457  * @since 3.1.0
    1458  * @access private
    1459  */
    1460 function _post_type_meta_capabilities( $capabilities = null ) {
    1461         static $meta_caps = array();
    1462         if ( null === $capabilities )
    1463                 return $meta_caps;
    1464         foreach ( $capabilities as $core => $custom ) {
    1465                 if ( in_array( $core, array( 'read_post', 'delete_post', 'edit_post' ) ) )
    1466                         $meta_caps[ $custom ] = $core;
    1467         }
    1468 }
    1469 
    1470 /**
    1471  * Builds an object with all post type labels out of a post type object
    1472  *
    1473  * Accepted keys of the label array in the post type object:
    1474  * - name - general name for the post type, usually plural. The same and overridden by $post_type_object->label. Default is Posts/Pages
    1475  * - singular_name - name for one object of this post type. Default is Post/Page
    1476  * - add_new - Default is Add New for both hierarchical and non-hierarchical types. When internationalizing this string, please use a {@link http://codex.wordpress.org/I18n_for_WordPress_Developers#Disambiguation_by_context gettext context} matching your post type. Example: <code>_x('Add New', 'product');</code>
    1477  * - add_new_item - Default is Add New Post/Add New Page
    1478  * - edit_item - Default is Edit Post/Edit Page
    1479  * - new_item - Default is New Post/New Page
    1480  * - view_item - Default is View Post/View Page
    1481  * - search_items - Default is Search Posts/Search Pages
    1482  * - not_found - Default is No posts found/No pages found
    1483  * - not_found_in_trash - Default is No posts found in Trash/No pages found in Trash
    1484  * - parent_item_colon - This string isn't used on non-hierarchical types. In hierarchical ones the default is Parent Page:
    1485  * - all_items - String for the submenu. Default is All Posts/All Pages
    1486  * - menu_name - Default is the same as <code>name</code>
    1487  *
    1488  * Above, the first default value is for non-hierarchical post types (like posts) and the second one is for hierarchical post types (like pages).
    1489  *
    1490  * @since 3.0.0
    1491  * @param object $post_type_object
    1492  * @return object object with all the labels as member variables
    1493  */
    1494 function get_post_type_labels( $post_type_object ) {
    1495         $nohier_vs_hier_defaults = array(
    1496                 'name' => array( _x('Posts', 'post type general name'), _x('Pages', 'post type general name') ),
    1497                 'singular_name' => array( _x('Post', 'post type singular name'), _x('Page', 'post type singular name') ),
    1498                 'add_new' => array( _x('Add New', 'post'), _x('Add New', 'page') ),
    1499                 'add_new_item' => array( __('Add New Post'), __('Add New Page') ),
    1500                 'edit_item' => array( __('Edit Post'), __('Edit Page') ),
    1501                 'new_item' => array( __('New Post'), __('New Page') ),
    1502                 'view_item' => array( __('View Post'), __('View Page') ),
    1503                 'search_items' => array( __('Search Posts'), __('Search Pages') ),
    1504                 'not_found' => array( __('No posts found.'), __('No pages found.') ),
    1505                 'not_found_in_trash' => array( __('No posts found in Trash.'), __('No pages found in Trash.') ),
    1506                 'parent_item_colon' => array( null, __('Parent Page:') ),
    1507                 'all_items' => array( __( 'All Posts' ), __( 'All Pages' ) )
    1508         );
    1509         $nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];
    1510 
    1511         $labels = _get_custom_object_labels( $post_type_object, $nohier_vs_hier_defaults );
    1512 
    1513         $post_type = $post_type_object->name;
    1514         return apply_filters( "post_type_labels_{$post_type}", $labels );
    1515 }
    1516 
    1517 /**
    1518  * Builds an object with custom-something object (post type, taxonomy) labels out of a custom-something object
    1519  *
    1520  * @access private
    1521  * @since 3.0.0
    1522  */
    1523 function _get_custom_object_labels( $object, $nohier_vs_hier_defaults ) {
    1524 
    1525         if ( isset( $object->label ) && empty( $object->labels['name'] ) )
    1526                 $object->labels['name'] = $object->label;
    1527 
    1528         if ( !isset( $object->labels['singular_name'] ) && isset( $object->labels['name'] ) )
    1529                 $object->labels['singular_name'] = $object->labels['name'];
    1530 
    1531         if ( ! isset( $object->labels['name_admin_bar'] ) )
    1532                 $object->labels['name_admin_bar'] = isset( $object->labels['singular_name'] ) ? $object->labels['singular_name'] : $object->name;
    1533 
    1534         if ( !isset( $object->labels['menu_name'] ) && isset( $object->labels['name'] ) )
    1535                 $object->labels['menu_name'] = $object->labels['name'];
    1536 
    1537         if ( !isset( $object->labels['all_items'] ) && isset( $object->labels['menu_name'] ) )
    1538                 $object->labels['all_items'] = $object->labels['menu_name'];
    1539 
    1540         foreach ( $nohier_vs_hier_defaults as $key => $value )
    1541                         $defaults[$key] = $object->hierarchical ? $value[1] : $value[0];
    1542 
    1543         $labels = array_merge( $defaults, $object->labels );
    1544         return (object)$labels;
    1545 }
    1546 
    1547 /**
    1548  * Adds submenus for post types.
    1549  *
    1550  * @access private
    1551  * @since 3.1.0
    1552  */
    1553 function _add_post_type_submenus() {
    1554         foreach ( get_post_types( array( 'show_ui' => true ) ) as $ptype ) {
    1555                 $ptype_obj = get_post_type_object( $ptype );
    1556                 // Submenus only.
    1557                 if ( ! $ptype_obj->show_in_menu || $ptype_obj->show_in_menu === true )
    1558                         continue;
    1559                 add_submenu_page( $ptype_obj->show_in_menu, $ptype_obj->labels->name, $ptype_obj->labels->all_items, $ptype_obj->cap->edit_posts, "edit.php?post_type=$ptype" );
    1560         }
    1561 }
    1562 add_action( 'admin_menu', '_add_post_type_submenus' );
    1563 
    1564 /**
    1565  * Register support of certain features for a post type.
    1566  *
    1567  * All features are directly associated with a functional area of the edit screen, such as the
    1568  * editor or a meta box: 'title', 'editor', 'comments', 'revisions', 'trackbacks', 'author',
    1569  * 'excerpt', 'page-attributes', 'thumbnail', and 'custom-fields'.
    1570  *
    1571  * Additionally, the 'revisions' feature dictates whether the post type will store revisions,
    1572  * and the 'comments' feature dictates whether the comments count will show on the edit screen.
    1573  *
    1574  * @since 3.0.0
    1575  * @param string $post_type The post type for which to add the feature
    1576  * @param string|array $feature the feature being added, can be an array of feature strings or a single string
    1577  */
    1578 function add_post_type_support( $post_type, $feature ) {
    1579         global $_wp_post_type_features;
    1580 
    1581         $features = (array) $feature;
    1582         foreach ($features as $feature) {
    1583                 if ( func_num_args() == 2 )
    1584                         $_wp_post_type_features[$post_type][$feature] = true;
    1585                 else
    1586                         $_wp_post_type_features[$post_type][$feature] = array_slice( func_get_args(), 2 );
    1587         }
    1588 }
    1589 
    1590 /**
    1591  * Remove support for a feature from a post type.
    1592  *
    1593  * @since 3.0.0
    1594  * @param string $post_type The post type for which to remove the feature
    1595  * @param string $feature The feature being removed
    1596  */
    1597 function remove_post_type_support( $post_type, $feature ) {
    1598         global $_wp_post_type_features;
    1599 
    1600         if ( !isset($_wp_post_type_features[$post_type]) )
    1601                 return;
    1602 
    1603         if ( isset($_wp_post_type_features[$post_type][$feature]) )
    1604                 unset($_wp_post_type_features[$post_type][$feature]);
    1605 }
    1606 
    1607 /**
    1608  * Get all the post type features
    1609  *
    1610  * @since 3.4.0
    1611  * @param string $post_type The post type
    1612  * @return array
    1613  */
    1614 
    1615 function get_all_post_type_supports( $post_type ) {
    1616         global $_wp_post_type_features;
    1617 
    1618         if ( isset( $_wp_post_type_features[$post_type] ) )
    1619                 return $_wp_post_type_features[$post_type];
    1620 
    1621         return array();
    1622 }
    1623 
    1624 /**
    1625  * Checks a post type's support for a given feature
    1626  *
    1627  * @since 3.0.0
    1628  * @param string $post_type The post type being checked
    1629  * @param string $feature the feature being checked
    1630  * @return boolean
    1631  */
    1632 
    1633 function post_type_supports( $post_type, $feature ) {
    1634         global $_wp_post_type_features;
    1635 
    1636         if ( !isset( $_wp_post_type_features[$post_type][$feature] ) )
    1637                 return false;
    1638 
    1639         // If no args passed then no extra checks need be performed
    1640         if ( func_num_args() <= 2 )
    1641                 return true;
    1642 
    1643         // @todo Allow pluggable arg checking
    1644         //$args = array_slice( func_get_args(), 2 );
    1645 
    1646         return true;
    1647 }
    1648 
    1649 /**
    1650  * Updates the post type for the post ID.
    1651  *
    1652  * The page or post cache will be cleaned for the post ID.
    1653  *
    1654  * @since 2.5.0
    1655  *
    1656  * @uses $wpdb
    1657  *
    1658  * @param int $post_id Post ID to change post type. Not actually optional.
    1659  * @param string $post_type Optional, default is post. Supported values are 'post' or 'page' to
    1660  *  name a few.
    1661  * @return int Amount of rows changed. Should be 1 for success and 0 for failure.
    1662  */
    1663 function set_post_type( $post_id = 0, $post_type = 'post' ) {
    1664         global $wpdb;
    1665 
    1666         $post_type = sanitize_post_field('post_type', $post_type, $post_id, 'db');
    1667         $return = $wpdb->update( $wpdb->posts, array('post_type' => $post_type), array('ID' => $post_id) );
    1668 
    1669         clean_post_cache( $post_id );
    1670 
    1671         return $return;
    1672 }
    1673 
    1674 /**
    1675  * Retrieve list of latest posts or posts matching criteria.
    1676  *
    1677  * The defaults are as follows:
    1678  *     'numberposts' - Default is 5. Total number of posts to retrieve.
    1679  *     'offset' - Default is 0. See {@link WP_Query::query()} for more.
    1680  *     'category' - What category to pull the posts from.
    1681  *     'orderby' - Default is 'post_date'. How to order the posts.
    1682  *     'order' - Default is 'DESC'. The order to retrieve the posts.
    1683  *     'include' - See {@link WP_Query::query()} for more.
    1684  *     'exclude' - See {@link WP_Query::query()} for more.
    1685  *     'meta_key' - See {@link WP_Query::query()} for more.
    1686  *     'meta_value' - See {@link WP_Query::query()} for more.
    1687  *     'post_type' - Default is 'post'. Can be 'page', or 'attachment' to name a few.
    1688  *     'post_parent' - The parent of the post or post type.
    1689  *     'post_status' - Default is 'publish'. Post status to retrieve.
    1690  *
    1691  * @since 1.2.0
    1692  * @uses $wpdb
    1693  * @uses WP_Query::query() See for more default arguments and information.
    1694  * @link http://codex.wordpress.org/Template_Tags/get_posts
    1695  *
    1696  * @param array $args Optional. Overrides defaults.
    1697  * @return array List of posts.
    1698  */
    1699 function get_posts($args = null) {
    1700         $defaults = array(
    1701                 'numberposts' => 5, 'offset' => 0,
    1702                 'category' => 0, 'orderby' => 'post_date',
    1703                 'order' => 'DESC', 'include' => array(),
    1704                 'exclude' => array(), 'meta_key' => '',
    1705                 'meta_value' =>'', 'post_type' => 'post',
    1706                 'suppress_filters' => true
    1707         );
    1708 
    1709         $r = wp_parse_args( $args, $defaults );
    1710         if ( empty( $r['post_status'] ) )
    1711                 $r['post_status'] = ( 'attachment' == $r['post_type'] ) ? 'inherit' : 'publish';
    1712         if ( ! empty($r['numberposts']) && empty($r['posts_per_page']) )
    1713                 $r['posts_per_page'] = $r['numberposts'];
    1714         if ( ! empty($r['category']) )
    1715                 $r['cat'] = $r['category'];
    1716         if ( ! empty($r['include']) ) {
    1717                 $incposts = wp_parse_id_list( $r['include'] );
    1718                 $r['posts_per_page'] = count($incposts);  // only the number of posts included
    1719                 $r['post__in'] = $incposts;
    1720         } elseif ( ! empty($r['exclude']) )
    1721                 $r['post__not_in'] = wp_parse_id_list( $r['exclude'] );
    1722 
    1723         $r['ignore_sticky_posts'] = true;
    1724         $r['no_found_rows'] = true;
    1725 
    1726         $get_posts = new WP_Query;
    1727         return $get_posts->query($r);
    1728 
    1729 }
    1730 
    1731 //
    1732 // Post meta functions
    1733 //
    1734 
    1735 /**
    1736  * Add meta data field to a post.
    1737  *
    1738  * Post meta data is called "Custom Fields" on the Administration Screen.
    1739  *
    1740  * @since 1.5.0
    1741  * @uses $wpdb
    1742  * @link http://codex.wordpress.org/Function_Reference/add_post_meta
    1743  *
    1744  * @param int $post_id Post ID.
    1745  * @param string $meta_key Metadata name (expected slashed).
    1746  * @param mixed $meta_value Metadata value (expected slashed).
    1747  * @param bool $unique Optional, default is false. Whether the same key should not be added.
    1748  * @return bool False for failure. True for success.
    1749  */
    1750 function add_post_meta( $post_id, $meta_key, $meta_value, $unique = false ) {
    1751         //_deprecated_function( __FUNCTION__, '3.6', 'wp_add_post_meta() (expects unslashed data)' );
    1752 
    1753         // expected slashed
    1754         $meta_key = stripslashes( $meta_key );
    1755         $meta_value = stripslashes_deep( $meta_value );
    1756 
    1757         return wp_add_post_meta( $post_id, $meta_key, $meta_value, $unique );
    1758 }
    1759 
    1760 /**
    1761  * Add meta data field to a post.
    1762  *
    1763  * Post meta data is called "Custom Fields" on the Administration Screen.
    1764  *
    1765  * @since 3.6.0
    1766  * @link http://codex.wordpress.org/Function_Reference/wp_add_post_meta
    1767  *
    1768  * @param int $post_id Post ID.
    1769  * @param string $meta_key Metadata name (clean, slashes already stripped).
    1770  * @param mixed $meta_value Metadata value (clean, slashes already stripped).
    1771  * @param bool $unique Optional, default is false. Whether the same key should not be added.
    1772  * @return bool False for failure. True for success.
    1773  */
    1774 function wp_add_post_meta( $post_id, $meta_key, $meta_value, $unique = false ) {
    1775         // make sure meta is added to the post, not a revision
    1776         if ( $the_post = wp_is_post_revision( $post_id ) )
    1777                 $post_id = $the_post;
    1778 
    1779         return add_metadata( 'post', $post_id, $meta_key, $meta_value, $unique );
    1780 }
    1781 
    1782 /**
    1783  * Remove metadata matching criteria from a post.
    1784  *
    1785  * You can match based on the key, or key and value. Removing based on key and
    1786  * value, will keep from removing duplicate metadata with the same key. It also
    1787  * allows removing all metadata matching key, if needed.
    1788  *
    1789  * @since 1.5.0
    1790  * @uses $wpdb
    1791  * @link http://codex.wordpress.org/Function_Reference/delete_post_meta
    1792  *
    1793  * @param int $post_id post ID
    1794  * @param string $meta_key Metadata name.
    1795  * @param mixed $meta_value Optional. Metadata value.
    1796  * @return bool False for failure. True for success.
    1797  */
    1798 function delete_post_meta($post_id, $meta_key, $meta_value = '') {
    1799         // make sure meta is added to the post, not a revision
    1800         if ( $the_post = wp_is_post_revision($post_id) )
    1801                 $post_id = $the_post;
    1802 
    1803         return delete_metadata('post', $post_id, $meta_key, $meta_value);
    1804 }
    1805 
    1806 /**
    1807  * Retrieve post meta field for a post.
    1808  *
    1809  * @since 1.5.0
    1810  * @uses $wpdb
    1811  * @link http://codex.wordpress.org/Function_Reference/get_post_meta
    1812  *
    1813  * @param int $post_id Post ID.
    1814  * @param string $key Optional. The meta key to retrieve. By default, returns data for all keys.
    1815  * @param bool $single Whether to return a single value.
    1816  * @return mixed Will be an array if $single is false. Will be value of meta data field if $single
    1817  *  is true.
    1818  */
    1819 function get_post_meta($post_id, $key = '', $single = false) {
    1820         return get_metadata('post', $post_id, $key, $single);
    1821 }
    1822 
    1823 /**
    1824  * Update post meta field based on post ID.
    1825  *
    1826  * Use the $prev_value parameter to differentiate between meta fields with the
    1827  * same key and post ID.
    1828  *
    1829  * If the meta field for the post does not exist, it will be added.
    1830  *
    1831  * @since 1.5.0
    1832  * @uses $wpdb
    1833  * @link http://codex.wordpress.org/Function_Reference/update_post_meta
    1834  *
    1835  * @param int $post_id Post ID.
    1836  * @param string $meta_key Metadata key (expected slashed).
    1837  * @param mixed $meta_value Metadata value (expected slashed).
    1838  * @param mixed $prev_value Optional. Previous value to check before removing.
    1839  * @return bool False on failure, true if success.
    1840  */
    1841 function update_post_meta( $post_id, $meta_key, $meta_value, $prev_value = '' ) {
    1842         //_deprecated_function( __FUNCTION__, '3.6', 'wp_update_post_meta() (expects unslashed data)' );
    1843 
    1844         // expected slashed
    1845         $meta_key = stripslashes( $meta_key );
    1846         $meta_value = stripslashes_deep( $meta_value );
    1847 
    1848         return wp_update_post_meta( $post_id, $meta_key, $meta_value, $prev_value );
    1849 }
    1850 
    1851 /**
    1852  * Update post meta field based on post ID.
    1853  *
    1854  * Use the $prev_value parameter to differentiate between meta fields with the
    1855  * same key and post ID.
    1856  *
    1857  * If the meta field for the post does not exist, it will be added.
    1858  *
    1859  * @since 3.6.0
    1860  * @uses $wpdb
    1861  * @link http://codex.wordpress.org/Function_Reference/wp_update_post_meta
    1862  *
    1863  * @param int $post_id Post ID.
    1864  * @param string $meta_key Metadata key (clean, slashes already stripped).
    1865  * @param mixed $meta_value Metadata value (clean, slashes already stripped).
    1866  * @param mixed $prev_value Optional. Previous value to check before removing.
    1867  * @return bool False on failure, true if success.
    1868  */
    1869 function wp_update_post_meta( $post_id, $meta_key, $meta_value, $prev_value = '' ) {
    1870         // make sure meta is added to the post, not a revision
    1871         if ( $the_post = wp_is_post_revision( $post_id ) )
    1872                 $post_id = $the_post;
    1873 
    1874         return update_metadata( 'post', $post_id, $meta_key, $meta_value, $prev_value );
    1875 }
    1876 
    1877 /**
    1878  * Delete everything from post meta matching meta key.
    1879  *
    1880  * @since 2.3.0
    1881  * @uses $wpdb
    1882  *
    1883  * @param string $post_meta_key Key to search for when deleting.
    1884  * @return bool Whether the post meta key was deleted from the database
    1885  */
    1886 function delete_post_meta_by_key($post_meta_key) {
    1887         return delete_metadata( 'post', null, $post_meta_key, '', true );
    1888 }
    1889 
    1890 /**
    1891  * Retrieve post meta fields, based on post ID.
    1892  *
    1893  * The post meta fields are retrieved from the cache where possible,
    1894  * so the function is optimized to be called more than once.
    1895  *
    1896  * @since 1.2.0
    1897  * @link http://codex.wordpress.org/Function_Reference/get_post_custom
    1898  *
    1899  * @param int $post_id Post ID.
    1900  * @return array
    1901  */
    1902 function get_post_custom( $post_id = 0 ) {
    1903         $post_id = absint( $post_id );
    1904         if ( ! $post_id )
    1905                 $post_id = get_the_ID();
    1906 
    1907         return get_post_meta( $post_id );
    1908 }
    1909 
    1910 /**
    1911  * Retrieve meta field names for a post.
    1912  *
    1913  * If there are no meta fields, then nothing (null) will be returned.
    1914  *
    1915  * @since 1.2.0
    1916  * @link http://codex.wordpress.org/Function_Reference/get_post_custom_keys
    1917  *
    1918  * @param int $post_id post ID
    1919  * @return array|null Either array of the keys, or null if keys could not be retrieved.
    1920  */
    1921 function get_post_custom_keys( $post_id = 0 ) {
    1922         $custom = get_post_custom( $post_id );
    1923 
    1924         if ( !is_array($custom) )
    1925                 return;
    1926 
    1927         if ( $keys = array_keys($custom) )
    1928                 return $keys;
    1929 }
    1930 
    1931 /**
    1932  * Retrieve values for a custom post field.
    1933  *
    1934  * The parameters must not be considered optional. All of the post meta fields
    1935  * will be retrieved and only the meta field key values returned.
    1936  *
    1937  * @since 1.2.0
    1938  * @link http://codex.wordpress.org/Function_Reference/get_post_custom_values
    1939  *
    1940  * @param string $key Meta field key.
    1941  * @param int $post_id Post ID
    1942  * @return array Meta field values.
    1943  */
    1944 function get_post_custom_values( $key = '', $post_id = 0 ) {
    1945         if ( !$key )
    1946                 return null;
    1947 
    1948         $custom = get_post_custom($post_id);
    1949 
    1950         return isset($custom[$key]) ? $custom[$key] : null;
    195172}
    195273
     
    197394
    197495        return $values;
    1975 }
    1976 
    1977 /**
    1978  * Check if post is sticky.
    1979  *
    1980  * Sticky posts should remain at the top of The Loop. If the post ID is not
    1981  * given, then The Loop ID for the current post will be used.
    1982  *
    1983  * @since 2.7.0
    1984  *
    1985  * @param int $post_id Optional. Post ID.
    1986  * @return bool Whether post is sticky.
    1987  */
    1988 function is_sticky( $post_id = 0 ) {
    1989         $post_id = absint( $post_id );
    1990 
    1991         if ( ! $post_id )
    1992                 $post_id = get_the_ID();
    1993 
    1994         $stickies = get_option( 'sticky_posts' );
    1995 
    1996         if ( ! is_array( $stickies ) )
    1997                 return false;
    1998 
    1999         if ( in_array( $post_id, $stickies ) )
    2000                 return true;
    2001 
    2002         return false;
    2003 }
    2004 
    2005 /**
    2006  * Sanitize every post field.
    2007  *
    2008  * If the context is 'raw', then the post object or array will get minimal santization of the int fields.
    2009  *
    2010  * @since 2.3.0
    2011  * @uses sanitize_post_field() Used to sanitize the fields.
    2012  *
    2013  * @param object|WP_Post|array $post The Post Object or Array
    2014  * @param string $context Optional, default is 'display'. How to sanitize post fields.
    2015  * @return object|WP_Post|array The now sanitized Post Object or Array (will be the same type as $post)
    2016  */
    2017 function sanitize_post($post, $context = 'display') {
    2018         if ( is_object($post) ) {
    2019                 // Check if post already filtered for this context
    2020                 if ( isset($post->filter) && $context == $post->filter )
    2021                         return $post;
    2022                 if ( !isset($post->ID) )
    2023                         $post->ID = 0;
    2024                 foreach ( array_keys(get_object_vars($post)) as $field )
    2025                         $post->$field = sanitize_post_field($field, $post->$field, $post->ID, $context);
    2026                 $post->filter = $context;
    2027         } else {
    2028                 // Check if post already filtered for this context
    2029                 if ( isset($post['filter']) && $context == $post['filter'] )
    2030                         return $post;
    2031                 if ( !isset($post['ID']) )
    2032                         $post['ID'] = 0;
    2033                 foreach ( array_keys($post) as $field )
    2034                         $post[$field] = sanitize_post_field($field, $post[$field], $post['ID'], $context);
    2035                 $post['filter'] = $context;
    2036         }
    2037         return $post;
    2038 }
    2039 
    2040 /**
    2041  * Sanitize post field based on context.
    2042  *
    2043  * Possible context values are:  'raw', 'edit', 'db', 'display', 'attribute' and 'js'. The
    2044  * 'display' context is used by default. 'attribute' and 'js' contexts are treated like 'display'
    2045  * when calling filters.
    2046  *
    2047  * @since 2.3.0
    2048  * @uses apply_filters() Calls 'edit_$field' and '{$field_no_prefix}_edit_pre' passing $value and
    2049  *  $post_id if $context == 'edit' and field name prefix == 'post_'.
    2050  *
    2051  * @uses apply_filters() Calls 'edit_post_$field' passing $value and $post_id if $context == 'db'.
    2052  * @uses apply_filters() Calls 'pre_$field' passing $value if $context == 'db' and field name prefix == 'post_'.
    2053  * @uses apply_filters() Calls '{$field}_pre' passing $value if $context == 'db' and field name prefix != 'post_'.
    2054  *
    2055  * @uses apply_filters() Calls '$field' passing $value, $post_id and $context if $context == anything
    2056  *  other than 'raw', 'edit' and 'db' and field name prefix == 'post_'.
    2057  * @uses apply_filters() Calls 'post_$field' passing $value if $context == anything other than 'raw',
    2058  *  'edit' and 'db' and field name prefix != 'post_'.
    2059  *
    2060  * @param string $field The Post Object field name.
    2061  * @param mixed $value The Post Object value.
    2062  * @param int $post_id Post ID.
    2063  * @param string $context How to sanitize post fields. Looks for 'raw', 'edit', 'db', 'display',
    2064  *               'attribute' and 'js'.
    2065  * @return mixed Sanitized value.
    2066  */
    2067 function sanitize_post_field($field, $value, $post_id, $context) {
    2068         $int_fields = array('ID', 'post_parent', 'menu_order', 'post_author', 'comment_count');
    2069         if ( in_array($field, $int_fields) )
    2070                 $value = (int) $value;
    2071 
    2072         // Fields which contain arrays of ints.
    2073         $array_int_fields = array( 'ancestors' );
    2074         if ( in_array($field, $array_int_fields) ) {
    2075                 $value = array_map( 'absint', $value);
    2076                 return $value;
    2077         }
    2078 
    2079         if ( 'raw' == $context )
    2080                 return $value;
    2081 
    2082         $prefixed = false;
    2083         if ( false !== strpos($field, 'post_') ) {
    2084                 $prefixed = true;
    2085                 $field_no_prefix = str_replace('post_', '', $field);
    2086         }
    2087 
    2088         if ( 'edit' == $context ) {
    2089                 $format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password');
    2090 
    2091                 if ( $prefixed ) {
    2092                         $value = apply_filters("edit_{$field}", $value, $post_id);
    2093                         // Old school
    2094                         $value = apply_filters("{$field_no_prefix}_edit_pre", $value, $post_id);
    2095                 } else {
    2096                         $value = apply_filters("edit_post_{$field}", $value, $post_id);
    2097                 }
    2098 
    2099                 if ( in_array($field, $format_to_edit) ) {
    2100                         if ( 'post_content' == $field )
    2101                                 $value = format_to_edit($value, user_can_richedit());
    2102                         else
    2103                                 $value = format_to_edit($value);
    2104                 } else {
    2105                         $value = esc_attr($value);
    2106                 }
    2107         } else if ( 'db' == $context ) {
    2108                 if ( $prefixed ) {
    2109                         $value = apply_filters("pre_{$field}", $value);
    2110                         $value = apply_filters("{$field_no_prefix}_save_pre", $value);
    2111                 } else {
    2112                         $value = apply_filters("pre_post_{$field}", $value);
    2113                         $value = apply_filters("{$field}_pre", $value);
    2114                 }
    2115         } else {
    2116                 // Use display filters by default.
    2117                 if ( $prefixed )
    2118                         $value = apply_filters($field, $value, $post_id, $context);
    2119                 else
    2120                         $value = apply_filters("post_{$field}", $value, $post_id, $context);
    2121         }
    2122 
    2123         if ( 'attribute' == $context )
    2124                 $value = esc_attr($value);
    2125         else if ( 'js' == $context )
    2126                 $value = esc_js($value);
    2127 
    2128         return $value;
    2129 }
    2130 
    2131 /**
    2132  * Make a post sticky.
    2133  *
    2134  * Sticky posts should be displayed at the top of the front page.
    2135  *
    2136  * @since 2.7.0
    2137  *
    2138  * @param int $post_id Post ID.
    2139  */
    2140 function stick_post($post_id) {
    2141         $stickies = get_option('sticky_posts');
    2142 
    2143         if ( !is_array($stickies) )
    2144                 $stickies = array($post_id);
    2145 
    2146         if ( ! in_array($post_id, $stickies) )
    2147                 $stickies[] = $post_id;
    2148 
    2149         update_option('sticky_posts', $stickies);
    2150 }
    2151 
    2152 /**
    2153  * Unstick a post.
    2154  *
    2155  * Sticky posts should be displayed at the top of the front page.
    2156  *
    2157  * @since 2.7.0
    2158  *
    2159  * @param int $post_id Post ID.
    2160  */
    2161 function unstick_post($post_id) {
    2162         $stickies = get_option('sticky_posts');
    2163 
    2164         if ( !is_array($stickies) )
    2165                 return;
    2166 
    2167         if ( ! in_array($post_id, $stickies) )
    2168                 return;
    2169 
    2170         $offset = array_search($post_id, $stickies);
    2171         if ( false === $offset )
    2172                 return;
    2173 
    2174         array_splice($stickies, $offset, 1);
    2175 
    2176         update_option('sticky_posts', $stickies);
    2177 }
    2178 
    2179 /**
    2180  * Count number of posts of a post type and is user has permissions to view.
    2181  *
    2182  * This function provides an efficient method of finding the amount of post's
    2183  * type a blog has. Another method is to count the amount of items in
    2184  * get_posts(), but that method has a lot of overhead with doing so. Therefore,
    2185  * when developing for 2.5+, use this function instead.
    2186  *
    2187  * The $perm parameter checks for 'readable' value and if the user can read
    2188  * private posts, it will display that for the user that is signed in.
    2189  *
    2190  * @since 2.5.0
    2191  * @link http://codex.wordpress.org/Template_Tags/wp_count_posts
    2192  *
    2193  * @param string $type Optional. Post type to retrieve count
    2194  * @param string $perm Optional. 'readable' or empty.
    2195  * @return object Number of posts for each status
    2196  */
    2197 function wp_count_posts( $type = 'post', $perm = '' ) {
    2198         global $wpdb;
    2199 
    2200         $user = wp_get_current_user();
    2201 
    2202         $cache_key = $type;
    2203 
    2204         $query = "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s";
    2205         if ( 'readable' == $perm && is_user_logged_in() ) {
    2206                 $post_type_object = get_post_type_object($type);
    2207                 if ( !current_user_can( $post_type_object->cap->read_private_posts ) ) {
    2208                         $cache_key .= '_' . $perm . '_' . $user->ID;
    2209                         $query .= " AND (post_status != 'private' OR ( post_author = '$user->ID' AND post_status = 'private' ))";
    2210                 }
    2211         }
    2212         $query .= ' GROUP BY post_status';
    2213 
    2214         $count = wp_cache_get($cache_key, 'counts');
    2215         if ( false !== $count )
    2216                 return $count;
    2217 
    2218         $count = $wpdb->get_results( $wpdb->prepare( $query, $type ), ARRAY_A );
    2219 
    2220         $stats = array();
    2221         foreach ( get_post_stati() as $state )
    2222                 $stats[$state] = 0;
    2223 
    2224         foreach ( (array) $count as $row )
    2225                 $stats[$row['post_status']] = $row['num_posts'];
    2226 
    2227         $stats = (object) $stats;
    2228         wp_cache_set($cache_key, $stats, 'counts');
    2229 
    2230         return $stats;
    2231 }
    2232 
    2233 /**
    2234  * Count number of attachments for the mime type(s).
    2235  *
    2236  * If you set the optional mime_type parameter, then an array will still be
    2237  * returned, but will only have the item you are looking for. It does not give
    2238  * you the number of attachments that are children of a post. You can get that
    2239  * by counting the number of children that post has.
    2240  *
    2241  * @since 2.5.0
    2242  *
    2243  * @param string|array $mime_type Optional. Array or comma-separated list of MIME patterns.
    2244  * @return array Number of posts for each mime type.
    2245  */
    2246 function wp_count_attachments( $mime_type = '' ) {
    2247         global $wpdb;
    2248 
    2249         $and = wp_post_mime_type_where( $mime_type );
    2250         $count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' $and GROUP BY post_mime_type", ARRAY_A );
    2251 
    2252         $stats = array();
    2253         foreach( (array) $count as $row ) {
    2254                 $stats[$row['post_mime_type']] = $row['num_posts'];
    2255         }
    2256         $stats['trash'] = $wpdb->get_var( "SELECT COUNT( * ) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status = 'trash' $and");
    2257 
    2258         return (object) $stats;
    2259 }
    2260 
    2261 /**
    2262  * Get default post mime types
    2263  *
    2264  * @since 2.9.0
    2265  *
    2266  * @return array
    2267  */
    2268 function get_post_mime_types() {
    2269         $post_mime_types = array(       //      array( adj, noun )
    2270                 'image' => array(__('Images'), __('Manage Images'), _n_noop('Image <span class="count">(%s)</span>', 'Images <span class="count">(%s)</span>')),
    2271                 'audio' => array(__('Audio'), __('Manage Audio'), _n_noop('Audio <span class="count">(%s)</span>', 'Audio <span class="count">(%s)</span>')),
    2272                 'video' => array(__('Video'), __('Manage Video'), _n_noop('Video <span class="count">(%s)</span>', 'Video <span class="count">(%s)</span>')),
    2273         );
    2274 
    2275         return apply_filters('post_mime_types', $post_mime_types);
    2276 }
    2277 
    2278 /**
    2279  * Check a MIME-Type against a list.
    2280  *
    2281  * If the wildcard_mime_types parameter is a string, it must be comma separated
    2282  * list. If the real_mime_types is a string, it is also comma separated to
    2283  * create the list.
    2284  *
    2285  * @since 2.5.0
    2286  *
    2287  * @param string|array $wildcard_mime_types e.g. audio/mpeg or image (same as image/*) or
    2288  *  flash (same as *flash*).
    2289  * @param string|array $real_mime_types post_mime_type values
    2290  * @return array array(wildcard=>array(real types))
    2291  */
    2292 function wp_match_mime_types($wildcard_mime_types, $real_mime_types) {
    2293         $matches = array();
    2294         if ( is_string($wildcard_mime_types) )
    2295                 $wildcard_mime_types = array_map('trim', explode(',', $wildcard_mime_types));
    2296         if ( is_string($real_mime_types) )
    2297                 $real_mime_types = array_map('trim', explode(',', $real_mime_types));
    2298         $wild = '[-._a-z0-9]*';
    2299         foreach ( (array) $wildcard_mime_types as $type ) {
    2300                 $type = str_replace('*', $wild, $type);
    2301                 $patternses[1][$type] = "^$type$";
    2302                 if ( false === strpos($type, '/') ) {
    2303                         $patternses[2][$type] = "^$type/";
    2304                         $patternses[3][$type] = $type;
    2305                 }
    2306         }
    2307         asort($patternses);
    2308         foreach ( $patternses as $patterns )
    2309                 foreach ( $patterns as $type => $pattern )
    2310                         foreach ( (array) $real_mime_types as $real )
    2311                                 if ( preg_match("#$pattern#", $real) && ( empty($matches[$type]) || false === array_search($real, $matches[$type]) ) )
    2312                                         $matches[$type][] = $real;
    2313         return $matches;
    2314 }
    2315 
    2316 /**
    2317  * Convert MIME types into SQL.
    2318  *
    2319  * @since 2.5.0
    2320  *
    2321  * @param string|array $post_mime_types List of mime types or comma separated string of mime types.
    2322  * @param string $table_alias Optional. Specify a table alias, if needed.
    2323  * @return string The SQL AND clause for mime searching.
    2324  */
    2325 function wp_post_mime_type_where($post_mime_types, $table_alias = '') {
    2326         $where = '';
    2327         $wildcards = array('', '%', '%/%');
    2328         if ( is_string($post_mime_types) )
    2329                 $post_mime_types = array_map('trim', explode(',', $post_mime_types));
    2330         foreach ( (array) $post_mime_types as $mime_type ) {
    2331                 $mime_type = preg_replace('/\s/', '', $mime_type);
    2332                 $slashpos = strpos($mime_type, '/');
    2333                 if ( false !== $slashpos ) {
    2334                         $mime_group = preg_replace('/[^-*.a-zA-Z0-9]/', '', substr($mime_type, 0, $slashpos));
    2335                         $mime_subgroup = preg_replace('/[^-*.+a-zA-Z0-9]/', '', substr($mime_type, $slashpos + 1));
    2336                         if ( empty($mime_subgroup) )
    2337                                 $mime_subgroup = '*';
    2338                         else
    2339                                 $mime_subgroup = str_replace('/', '', $mime_subgroup);
    2340                         $mime_pattern = "$mime_group/$mime_subgroup";
    2341                 } else {
    2342                         $mime_pattern = preg_replace('/[^-*.a-zA-Z0-9]/', '', $mime_type);
    2343                         if ( false === strpos($mime_pattern, '*') )
    2344                                 $mime_pattern .= '/*';
    2345                 }
    2346 
    2347                 $mime_pattern = preg_replace('/\*+/', '%', $mime_pattern);
    2348 
    2349                 if ( in_array( $mime_type, $wildcards ) )
    2350                         return '';
    2351 
    2352                 if ( false !== strpos($mime_pattern, '%') )
    2353                         $wheres[] = empty($table_alias) ? "post_mime_type LIKE '$mime_pattern'" : "$table_alias.post_mime_type LIKE '$mime_pattern'";
    2354                 else
    2355                         $wheres[] = empty($table_alias) ? "post_mime_type = '$mime_pattern'" : "$table_alias.post_mime_type = '$mime_pattern'";
    2356         }
    2357         if ( !empty($wheres) )
    2358                 $where = ' AND (' . join(' OR ', $wheres) . ') ';
    2359         return $where;
    2360 }
    2361 
    2362 /**
    2363  * Trashes or deletes a post or page.
    2364  *
    2365  * When the post and page is permanently deleted, everything that is tied to it is deleted also.
    2366  * This includes comments, post meta fields, and terms associated with the post.
    2367  *
    2368  * The post or page is moved to trash instead of permanently deleted unless trash is
    2369  * disabled, item is already in the trash, or $force_delete is true.
    2370  *
    2371  * @since 1.0.0
    2372  * @uses do_action() on 'delete_post' before deletion unless post type is 'attachment'.
    2373  * @uses do_action() on 'deleted_post' after deletion unless post type is 'attachment'.
    2374  * @uses wp_delete_attachment() if post type is 'attachment'.
    2375  * @uses wp_trash_post() if item should be trashed.
    2376  *
    2377  * @param int $postid Post ID.
    2378  * @param bool $force_delete Whether to bypass trash and force deletion. Defaults to false.
    2379  * @return mixed False on failure
    2380  */
    2381 function wp_delete_post( $postid = 0, $force_delete = false ) {
    2382         global $wpdb;
    2383 
    2384         if ( !$post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
    2385                 return $post;
    2386 
    2387         if ( !$force_delete && ( $post->post_type == 'post' || $post->post_type == 'page') && get_post_status( $postid ) != 'trash' && EMPTY_TRASH_DAYS )
    2388                         return wp_trash_post($postid);
    2389 
    2390         if ( $post->post_type == 'attachment' )
    2391                 return wp_delete_attachment( $postid, $force_delete );
    2392 
    2393         do_action('before_delete_post', $postid);
    2394 
    2395         delete_post_meta($postid,'_wp_trash_meta_status');
    2396         delete_post_meta($postid,'_wp_trash_meta_time');
    2397 
    2398         wp_delete_object_term_relationships($postid, get_object_taxonomies($post->post_type));
    2399 
    2400         $parent_data = array( 'post_parent' => $post->post_parent );
    2401         $parent_where = array( 'post_parent' => $postid );
    2402 
    2403         if ( is_post_type_hierarchical( $post->post_type ) ) {
    2404                 // Point children of this page to its parent, also clean the cache of affected children
    2405                 $children_query = $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE post_parent = %d AND post_type = %s", $postid, $post->post_type );
    2406                 $children = $wpdb->get_results( $children_query );
    2407 
    2408                 $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => $post->post_type ) );
    2409         }
    2410 
    2411         if ( 'page' == $post->post_type) {
    2412                 // if the page is defined in option page_on_front or post_for_posts,
    2413                 // adjust the corresponding options
    2414                 if ( get_option('page_on_front') == $postid ) {
    2415                         update_option('show_on_front', 'posts');
    2416                         delete_option('page_on_front');
    2417                 }
    2418                 if ( get_option('page_for_posts') == $postid ) {
    2419                         delete_option('page_for_posts');
    2420                 }
    2421         } else {
    2422                 unstick_post($postid);
    2423         }
    2424 
    2425         // Do raw query. wp_get_post_revisions() is filtered
    2426         $revision_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_parent = %d AND post_type = 'revision'", $postid ) );
    2427         // Use wp_delete_post (via wp_delete_post_revision) again. Ensures any meta/misplaced data gets cleaned up.
    2428         foreach ( $revision_ids as $revision_id )
    2429                 wp_delete_post_revision( $revision_id );
    2430 
    2431         // Point all attachments to this post up one level
    2432         $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'attachment' ) );
    2433 
    2434         $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
    2435         foreach ( $comment_ids as $comment_id )
    2436                 wp_delete_comment( $comment_id, true );
    2437 
    2438         $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid ));
    2439         foreach ( $post_meta_ids as $mid )
    2440                 delete_metadata_by_mid( 'post', $mid );
    2441 
    2442         do_action( 'delete_post', $postid );
    2443         $wpdb->delete( $wpdb->posts, array( 'ID' => $postid ) );
    2444         do_action( 'deleted_post', $postid );
    2445 
    2446         clean_post_cache( $post );
    2447 
    2448         if ( is_post_type_hierarchical( $post->post_type ) && $children ) {
    2449                 foreach ( $children as $child )
    2450                         clean_post_cache( $child );
    2451         }
    2452 
    2453         wp_clear_scheduled_hook('publish_future_post', array( $postid ) );
    2454 
    2455         do_action('after_delete_post', $postid);
    2456 
    2457         return $post;
    2458 }
    2459 
    2460 /**
    2461  * Moves a post or page to the Trash
    2462  *
    2463  * If trash is disabled, the post or page is permanently deleted.
    2464  *
    2465  * @since 2.9.0
    2466  * @uses do_action() on 'trash_post' before trashing
    2467  * @uses do_action() on 'trashed_post' after trashing
    2468  * @uses wp_delete_post() if trash is disabled
    2469  *
    2470  * @param int $post_id Post ID.
    2471  * @return mixed False on failure
    2472  */
    2473 function wp_trash_post($post_id = 0) {
    2474         if ( !EMPTY_TRASH_DAYS )
    2475                 return wp_delete_post($post_id, true);
    2476 
    2477         if ( !$post = get_post($post_id, ARRAY_A) )
    2478                 return $post;
    2479 
    2480         if ( $post['post_status'] == 'trash' )
    2481                 return false;
    2482 
    2483         do_action('wp_trash_post', $post_id);
    2484 
    2485         wp_add_post_meta($post_id,'_wp_trash_meta_status', $post['post_status']);
    2486         wp_add_post_meta($post_id,'_wp_trash_meta_time', time());
    2487 
    2488         $post['post_status'] = 'trash';
    2489         wp_insert_post($post);
    2490 
    2491         wp_trash_post_comments($post_id);
    2492 
    2493         do_action('trashed_post', $post_id);
    2494 
    2495         return $post;
    2496 }
    2497 
    2498 /**
    2499  * Restores a post or page from the Trash
    2500  *
    2501  * @since 2.9.0
    2502  * @uses do_action() on 'untrash_post' before undeletion
    2503  * @uses do_action() on 'untrashed_post' after undeletion
    2504  *
    2505  * @param int $post_id Post ID.
    2506  * @return mixed False on failure
    2507  */
    2508 function wp_untrash_post($post_id = 0) {
    2509         if ( !$post = get_post($post_id, ARRAY_A) )
    2510                 return $post;
    2511 
    2512         if ( $post['post_status'] != 'trash' )
    2513                 return false;
    2514 
    2515         do_action('untrash_post', $post_id);
    2516 
    2517         $post_status = get_post_meta($post_id, '_wp_trash_meta_status', true);
    2518 
    2519         $post['post_status'] = $post_status;
    2520 
    2521         delete_post_meta($post_id, '_wp_trash_meta_status');
    2522         delete_post_meta($post_id, '_wp_trash_meta_time');
    2523 
    2524         wp_insert_post($post);
    2525 
    2526         wp_untrash_post_comments($post_id);
    2527 
    2528         do_action('untrashed_post', $post_id);
    2529 
    2530         return $post;
    2531 }
    2532 
    2533 /**
    2534  * Moves comments for a post to the trash
    2535  *
    2536  * @since 2.9.0
    2537  * @uses do_action() on 'trash_post_comments' before trashing
    2538  * @uses do_action() on 'trashed_post_comments' after trashing
    2539  *
    2540  * @param int $post Post ID or object.
    2541  * @return mixed False on failure
    2542  */
    2543 function wp_trash_post_comments($post = null) {
    2544         global $wpdb;
    2545 
    2546         $post = get_post($post);
    2547         if ( empty($post) )
    2548                 return;
    2549 
    2550         $post_id = $post->ID;
    2551 
    2552         do_action('trash_post_comments', $post_id);
    2553 
    2554         $comments = $wpdb->get_results( $wpdb->prepare("SELECT comment_ID, comment_approved FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id) );
    2555         if ( empty($comments) )
    2556                 return;
    2557 
    2558         // Cache current status for each comment
    2559         $statuses = array();
    2560         foreach ( $comments as $comment )
    2561                 $statuses[$comment->comment_ID] = $comment->comment_approved;
    2562         wp_add_post_meta($post_id, '_wp_trash_meta_comments_status', $statuses);
    2563 
    2564         // Set status for all comments to post-trashed
    2565         $result = $wpdb->update($wpdb->comments, array('comment_approved' => 'post-trashed'), array('comment_post_ID' => $post_id));
    2566 
    2567         clean_comment_cache( array_keys($statuses) );
    2568 
    2569         do_action('trashed_post_comments', $post_id, $statuses);
    2570 
    2571         return $result;
    2572 }
    2573 
    2574 /**
    2575  * Restore comments for a post from the trash
    2576  *
    2577  * @since 2.9.0
    2578  * @uses do_action() on 'untrash_post_comments' before trashing
    2579  * @uses do_action() on 'untrashed_post_comments' after trashing
    2580  *
    2581  * @param int $post Post ID or object.
    2582  * @return mixed False on failure
    2583  */
    2584 function wp_untrash_post_comments($post = null) {
    2585         global $wpdb;
    2586 
    2587         $post = get_post($post);
    2588         if ( empty($post) )
    2589                 return;
    2590 
    2591         $post_id = $post->ID;
    2592 
    2593         $statuses = get_post_meta($post_id, '_wp_trash_meta_comments_status', true);
    2594 
    2595         if ( empty($statuses) )
    2596                 return true;
    2597 
    2598         do_action('untrash_post_comments', $post_id);
    2599 
    2600         // Restore each comment to its original status
    2601         $group_by_status = array();
    2602         foreach ( $statuses as $comment_id => $comment_status )
    2603                 $group_by_status[$comment_status][] = $comment_id;
    2604 
    2605         foreach ( $group_by_status as $status => $comments ) {
    2606                 // Sanity check. This shouldn't happen.
    2607                 if ( 'post-trashed' == $status )
    2608                         $status = '0';
    2609                 $comments_in = implode( "', '", $comments );
    2610                 $wpdb->query( "UPDATE $wpdb->comments SET comment_approved = '$status' WHERE comment_ID IN ('" . $comments_in . "')" );
    2611         }
    2612 
    2613         clean_comment_cache( array_keys($statuses) );
    2614 
    2615         delete_post_meta($post_id, '_wp_trash_meta_comments_status');
    2616 
    2617         do_action('untrashed_post_comments', $post_id);
    2618 }
    2619 
    2620 /**
    2621  * Retrieve the list of categories for a post.
    2622  *
    2623  * Compatibility layer for themes and plugins. Also an easy layer of abstraction
    2624  * away from the complexity of the taxonomy layer.
    2625  *
    2626  * @since 2.1.0
    2627  *
    2628  * @uses wp_get_object_terms() Retrieves the categories. Args details can be found here.
    2629  *
    2630  * @param int $post_id Optional. The Post ID.
    2631  * @param array $args Optional. Overwrite the defaults.
    2632  * @return array
    2633  */
    2634 function wp_get_post_categories( $post_id = 0, $args = array() ) {
    2635         $post_id = (int) $post_id;
    2636 
    2637         $defaults = array('fields' => 'ids');
    2638         $args = wp_parse_args( $args, $defaults );
    2639 
    2640         $cats = wp_get_object_terms($post_id, 'category', $args);
    2641         return $cats;
    2642 }
    2643 
    2644 /**
    2645  * Retrieve the tags for a post.
    2646  *
    2647  * There is only one default for this function, called 'fields' and by default
    2648  * is set to 'all'. There are other defaults that can be overridden in
    2649  * {@link wp_get_object_terms()}.
    2650  *
    2651  * @package WordPress
    2652  * @subpackage Post
    2653  * @since 2.3.0
    2654  *
    2655  * @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
    2656  *
    2657  * @param int $post_id Optional. The Post ID
    2658  * @param array $args Optional. Overwrite the defaults
    2659  * @return array List of post tags.
    2660  */
    2661 function wp_get_post_tags( $post_id = 0, $args = array() ) {
    2662         return wp_get_post_terms( $post_id, 'post_tag', $args);
    2663 }
    2664 
    2665 /**
    2666  * Retrieve the terms for a post.
    2667  *
    2668  * There is only one default for this function, called 'fields' and by default
    2669  * is set to 'all'. There are other defaults that can be overridden in
    2670  * {@link wp_get_object_terms()}.
    2671  *
    2672  * @package WordPress
    2673  * @subpackage Post
    2674  * @since 2.8.0
    2675  *
    2676  * @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
    2677  *
    2678  * @param int $post_id Optional. The Post ID
    2679  * @param string $taxonomy The taxonomy for which to retrieve terms. Defaults to post_tag.
    2680  * @param array $args Optional. Overwrite the defaults
    2681  * @return array List of post tags.
    2682  */
    2683 function wp_get_post_terms( $post_id = 0, $taxonomy = 'post_tag', $args = array() ) {
    2684         $post_id = (int) $post_id;
    2685 
    2686         $defaults = array('fields' => 'all');
    2687         $args = wp_parse_args( $args, $defaults );
    2688 
    2689         $tags = wp_get_object_terms($post_id, $taxonomy, $args);
    2690 
    2691         return $tags;
    2692 }
    2693 
    2694 /**
    2695  * Retrieve number of recent posts.
    2696  *
    2697  * @since 1.0.0
    2698  * @uses wp_parse_args()
    2699  * @uses get_posts()
    2700  *
    2701  * @param string $deprecated Deprecated.
    2702  * @param array $args Optional. Overrides defaults.
    2703  * @param string $output Optional.
    2704  * @return unknown.
    2705  */
    2706 function wp_get_recent_posts( $args = array(), $output = ARRAY_A ) {
    2707 
    2708         if ( is_numeric( $args ) ) {
    2709                 _deprecated_argument( __FUNCTION__, '3.1', __( 'Passing an integer number of posts is deprecated. Pass an array of arguments instead.' ) );
    2710                 $args = array( 'numberposts' => absint( $args ) );
    2711         }
    2712 
    2713         // Set default arguments
    2714         $defaults = array(
    2715                 'numberposts' => 10, 'offset' => 0,
    2716                 'category' => 0, 'orderby' => 'post_date',
    2717                 'order' => 'DESC', 'include' => '',
    2718                 'exclude' => '', 'meta_key' => '',
    2719                 'meta_value' =>'', 'post_type' => 'post', 'post_status' => 'draft, publish, future, pending, private',
    2720                 'suppress_filters' => true
    2721         );
    2722 
    2723         $r = wp_parse_args( $args, $defaults );
    2724 
    2725         $results = get_posts( $r );
    2726 
    2727         // Backward compatibility. Prior to 3.1 expected posts to be returned in array
    2728         if ( ARRAY_A == $output ){
    2729                 foreach( $results as $key => $result ) {
    2730                         $results[$key] = get_object_vars( $result );
    2731                 }
    2732                 return $results ? $results : array();
    2733         }
    2734 
    2735         return $results ? $results : false;
    2736 
    2737 }
    2738 
    2739 /**
    2740  * Insert a post.
    2741  *
    2742  * If the $postarr parameter has 'ID' set to a value, then post will be updated.
    2743  *
    2744  * You can set the post date manually, by setting the values for 'post_date'
    2745  * and 'post_date_gmt' keys. You can close the comments or open the comments by
    2746  * setting the value for 'comment_status' key.
    2747  *
    2748  * The defaults for the parameter $postarr are:
    2749  *     'post_status'   - Default is 'draft'.
    2750  *     'post_type'     - Default is 'post'.
    2751  *     'post_author'   - Default is current user ID ($user_ID). The ID of the user who added the post.
    2752  *     'ping_status'   - Default is the value in 'default_ping_status' option.
    2753  *                       Whether the attachment can accept pings.
    2754  *     'post_parent'   - Default is 0. Set this for the post it belongs to, if any.
    2755  *     'menu_order'    - Default is 0. The order it is displayed.
    2756  *     'to_ping'       - Whether to ping.
    2757  *     'pinged'        - Default is empty string.
    2758  *     'post_password' - Default is empty string. The password to access the attachment.
    2759  *     'guid'          - Global Unique ID for referencing the attachment.
    2760  *     'post_content_filtered' - Post content filtered.
    2761  *     'post_excerpt'  - Post excerpt.
    2762  *
    2763  * @since 1.0.0
    2764  * @uses $wpdb
    2765  * @uses $user_ID
    2766  * @uses do_action() Calls 'pre_post_update' on post ID if this is an update.
    2767  * @uses do_action() Calls 'edit_post' action on post ID and post data if this is an update.
    2768  * @uses do_action() Calls 'save_post' and 'wp_insert_post' on post id and post data just before returning.
    2769  * @uses apply_filters() Calls 'wp_insert_post_data' passing $data, $postarr prior to database update or insert.
    2770  * @uses wp_transition_post_status()
    2771  *
    2772  * @param array $postarr Elements that make up post to insert.
    2773  * @param bool $wp_error Optional. Allow return of WP_Error on failure.
    2774  * @return int|WP_Error The value 0 or WP_Error on failure. The post ID on success.
    2775  */
    2776 function wp_insert_post($postarr, $wp_error = false) {
    2777         global $wpdb, $user_ID;
    2778 
    2779         $defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
    2780                 'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
    2781                 'menu_order' => 0, 'to_ping' =>  '', 'pinged' => '', 'post_password' => '',
    2782                 'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0,
    2783                 'post_content' => '', 'post_title' => '');
    2784 
    2785         $postarr = wp_parse_args($postarr, $defaults);
    2786 
    2787         unset( $postarr[ 'filter' ] );
    2788 
    2789         $postarr = sanitize_post($postarr, 'db');
    2790 
    2791         // export array as variables
    2792         extract($postarr, EXTR_SKIP);
    2793 
    2794         // Are we updating or creating?
    2795         $update = false;
    2796         if ( !empty($ID) ) {
    2797                 $update = true;
    2798                 $previous_status = get_post_field('post_status', $ID);
    2799         } else {
    2800                 $previous_status = 'new';
    2801         }
    2802 
    2803         $maybe_empty = ! $post_content && ! $post_title && ! $post_excerpt && post_type_supports( $post_type, 'editor' )
    2804                 && post_type_supports( $post_type, 'title' ) && post_type_supports( $post_type, 'excerpt' );
    2805         if ( apply_filters( 'wp_insert_post_empty_content', $maybe_empty, $postarr ) ) {
    2806                 if ( $wp_error )
    2807                         return new WP_Error( 'empty_content', __( 'Content, title, and excerpt are empty.' ) );
    2808                 else
    2809                         return 0;
    2810         }
    2811 
    2812         if ( empty($post_type) )
    2813                 $post_type = 'post';
    2814 
    2815         if ( empty($post_status) )
    2816                 $post_status = 'draft';
    2817 
    2818         if ( !empty($post_category) )
    2819                 $post_category = array_filter($post_category); // Filter out empty terms
    2820 
    2821         // Make sure we set a valid category.
    2822         if ( empty($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
    2823                 // 'post' requires at least one category.
    2824                 if ( 'post' == $post_type && 'auto-draft' != $post_status )
    2825                         $post_category = array( get_option('default_category') );
    2826                 else
    2827                         $post_category = array();
    2828         }
    2829 
    2830         if ( empty($post_author) )
    2831                 $post_author = $user_ID;
    2832 
    2833         $post_ID = 0;
    2834 
    2835         // Get the post ID and GUID
    2836         if ( $update ) {
    2837                 $post_ID = (int) $ID;
    2838                 $guid = get_post_field( 'guid', $post_ID );
    2839                 $post_before = get_post($post_ID);
    2840         }
    2841 
    2842         // Don't allow contributors to set the post slug for pending review posts
    2843         if ( 'pending' == $post_status && !current_user_can( 'publish_posts' ) )
    2844                 $post_name = '';
    2845 
    2846         // Create a valid post name. Drafts and pending posts are allowed to have an empty
    2847         // post name.
    2848         if ( empty($post_name) ) {
    2849                 if ( !in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
    2850                         $post_name = sanitize_title($post_title);
    2851                 else
    2852                         $post_name = '';
    2853         } else {
    2854                 // On updates, we need to check to see if it's using the old, fixed sanitization context.
    2855                 $check_name = sanitize_title( $post_name, '', 'old-save' );
    2856                 if ( $update && strtolower( urlencode( $post_name ) ) == $check_name && get_post_field( 'post_name', $ID ) == $check_name )
    2857                         $post_name = $check_name;
    2858                 else // new post, or slug has changed.
    2859                         $post_name = sanitize_title($post_name);
    2860         }
    2861 
    2862         // If the post date is empty (due to having been new or a draft) and status is not 'draft' or 'pending', set date to now
    2863         if ( empty($post_date) || '0000-00-00 00:00:00' == $post_date )
    2864                 $post_date = current_time('mysql');
    2865 
    2866                 // validate the date
    2867                 $mm = substr( $post_date, 5, 2 );
    2868                 $jj = substr( $post_date, 8, 2 );
    2869                 $aa = substr( $post_date, 0, 4 );
    2870                 $valid_date = wp_checkdate( $mm, $jj, $aa, $post_date );
    2871                 if ( !$valid_date ) {
    2872                         if ( $wp_error )
    2873                                 return new WP_Error( 'invalid_date', __( 'Whoops, the provided date is invalid.' ) );
    2874                         else
    2875                                 return 0;
    2876                 }
    2877 
    2878         if ( empty($post_date_gmt) || '0000-00-00 00:00:00' == $post_date_gmt ) {
    2879                 if ( !in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
    2880                         $post_date_gmt = get_gmt_from_date($post_date);
    2881                 else
    2882                         $post_date_gmt = '0000-00-00 00:00:00';
    2883         }
    2884 
    2885         if ( $update || '0000-00-00 00:00:00' == $post_date ) {
    2886                 $post_modified     = current_time( 'mysql' );
    2887                 $post_modified_gmt = current_time( 'mysql', 1 );
    2888         } else {
    2889                 $post_modified     = $post_date;
    2890                 $post_modified_gmt = $post_date_gmt;
    2891         }
    2892 
    2893         if ( 'publish' == $post_status ) {
    2894                 $now = gmdate('Y-m-d H:i:59');
    2895                 if ( mysql2date('U', $post_date_gmt, false) > mysql2date('U', $now, false) )
    2896                         $post_status = 'future';
    2897         } elseif( 'future' == $post_status ) {
    2898                 $now = gmdate('Y-m-d H:i:59');
    2899                 if ( mysql2date('U', $post_date_gmt, false) <= mysql2date('U', $now, false) )
    2900                         $post_status = 'publish';
    2901         }
    2902 
    2903         if ( empty($comment_status) ) {
    2904                 if ( $update )
    2905                         $comment_status = 'closed';
    2906                 else
    2907                         $comment_status = get_option('default_comment_status');
    2908         }
    2909         if ( empty($ping_status) )
    2910                 $ping_status = get_option('default_ping_status');
    2911 
    2912         if ( isset($to_ping) )
    2913                 $to_ping = sanitize_trackback_urls( $to_ping );
    2914         else
    2915                 $to_ping = '';
    2916 
    2917         if ( ! isset($pinged) )
    2918                 $pinged = '';
    2919 
    2920         if ( isset($post_parent) )
    2921                 $post_parent = (int) $post_parent;
    2922         else
    2923                 $post_parent = 0;
    2924 
    2925         // Check the post_parent to see if it will cause a hierarchy loop
    2926         $post_parent = apply_filters( 'wp_insert_post_parent', $post_parent, $post_ID, compact( array_keys( $postarr ) ), $postarr );
    2927 
    2928         if ( isset($menu_order) )
    2929                 $menu_order = (int) $menu_order;
    2930         else
    2931                 $menu_order = 0;
    2932 
    2933         if ( !isset($post_password) || 'private' == $post_status )
    2934                 $post_password = '';
    2935 
    2936         $post_name = wp_unique_post_slug($post_name, $post_ID, $post_status, $post_type, $post_parent);
    2937 
    2938         $data = compact( array( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_content_filtered', 'post_title', 'post_excerpt', 'post_status', 'post_type', 'comment_status', 'ping_status', 'post_password', 'post_name', 'to_ping', 'pinged', 'post_modified', 'post_modified_gmt', 'post_parent', 'menu_order', 'guid' ) );
    2939         $data = apply_filters('wp_insert_post_data', $data, $postarr);
    2940         $where = array( 'ID' => $post_ID );
    2941 
    2942         if ( $update ) {
    2943                 do_action( 'pre_post_update', $post_ID, $data );
    2944                 if ( false === $wpdb->update( $wpdb->posts, $data, $where ) ) {
    2945                         if ( $wp_error )
    2946                                 return new WP_Error('db_update_error', __('Could not update post in the database'), $wpdb->last_error);
    2947                         else
    2948                                 return 0;
    2949                 }
    2950         } else {
    2951                 if ( isset($post_mime_type) )
    2952                         $data['post_mime_type'] = $post_mime_type; // This isn't in the update
    2953                 // If there is a suggested ID, use it if not already present
    2954                 if ( !empty($import_id) ) {
    2955                         $import_id = (int) $import_id;
    2956                         if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
    2957                                 $data['ID'] = $import_id;
    2958                         }
    2959                 }
    2960                 if ( false === $wpdb->insert( $wpdb->posts, $data ) ) {
    2961                         if ( $wp_error )
    2962                                 return new WP_Error('db_insert_error', __('Could not insert post into the database'), $wpdb->last_error);
    2963                         else
    2964                                 return 0;
    2965                 }
    2966                 $post_ID = (int) $wpdb->insert_id;
    2967 
    2968                 // use the newly generated $post_ID
    2969                 $where = array( 'ID' => $post_ID );
    2970         }
    2971 
    2972         if ( empty($data['post_name']) && !in_array( $data['post_status'], array( 'draft', 'pending', 'auto-draft' ) ) ) {
    2973                 $data['post_name'] = sanitize_title($data['post_title'], $post_ID);
    2974                 $wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
    2975         }
    2976 
    2977         if ( is_object_in_taxonomy($post_type, 'category') )
    2978                 wp_set_post_categories( $post_ID, $post_category );
    2979 
    2980         if ( isset( $tags_input ) && is_object_in_taxonomy($post_type, 'post_tag') )
    2981                 wp_set_post_tags( $post_ID, $tags_input );
    2982 
    2983         // new-style support for all custom taxonomies
    2984         if ( !empty($tax_input) ) {
    2985                 foreach ( $tax_input as $taxonomy => $tags ) {
    2986                         $taxonomy_obj = get_taxonomy($taxonomy);
    2987                         if ( is_array($tags) ) // array = hierarchical, string = non-hierarchical.
    2988                                 $tags = array_filter($tags);
    2989                         if ( current_user_can($taxonomy_obj->cap->assign_terms) )
    2990                                 wp_set_post_terms( $post_ID, $tags, $taxonomy );
    2991                 }
    2992         }
    2993 
    2994         $current_guid = get_post_field( 'guid', $post_ID );
    2995 
    2996         // Set GUID
    2997         if ( !$update && '' == $current_guid )
    2998                 $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post_ID ) ), $where );
    2999 
    3000         clean_post_cache( $post_ID );
    3001 
    3002         $post = get_post($post_ID);
    3003 
    3004         if ( !empty($page_template) && 'page' == $data['post_type'] ) {
    3005                 $post->page_template = $page_template;
    3006                 $page_templates = wp_get_theme()->get_page_templates();
    3007                 if ( 'default' != $page_template && ! isset( $page_templates[ $page_template ] ) ) {
    3008                         if ( $wp_error )
    3009                                 return new WP_Error('invalid_page_template', __('The page template is invalid.'));
    3010                         else
    3011                                 return 0;
    3012                 }
    3013                 wp_update_post_meta($post_ID, '_wp_page_template',  $page_template);
    3014         }
    3015 
    3016         wp_transition_post_status($data['post_status'], $previous_status, $post);
    3017 
    3018         if ( $update ) {
    3019                 do_action('edit_post', $post_ID, $post);
    3020                 $post_after = get_post($post_ID);
    3021                 do_action( 'post_updated', $post_ID, $post_after, $post_before);
    3022         }
    3023 
    3024         do_action('save_post', $post_ID, $post);
    3025         do_action('wp_insert_post', $post_ID, $post);
    3026 
    3027         return $post_ID;
    3028 }
    3029 
    3030 /**
    3031  * Update a post with new post data.
    3032  *
    3033  * The date does not have to be set for drafts. You can set the date and it will
    3034  * not be overridden.
    3035  *
    3036  * @since 1.0.0
    3037  *
    3038  * @param array|object $postarr Post data. Arrays are expected to be escaped, objects are not.
    3039  * @param bool $wp_error Optional. Allow return of WP_Error on failure.
    3040  * @return int|WP_Error The value 0 or WP_Error on failure. The post ID on success.
    3041  */
    3042 function wp_update_post( $postarr = array(), $wp_error = false ) {
    3043         if ( is_object($postarr) ) {
    3044                 // non-escaped post was passed
    3045                 $postarr = get_object_vars($postarr);
    3046         }
    3047 
    3048         // First, get all of the original fields
    3049         $post = get_post($postarr['ID'], ARRAY_A);
    3050 
    3051         // Passed post category list overwrites existing category list if not empty.
    3052         if ( isset($postarr['post_category']) && is_array($postarr['post_category'])
    3053                          && 0 != count($postarr['post_category']) )
    3054                 $post_cats = $postarr['post_category'];
    3055         else
    3056                 $post_cats = $post['post_category'];
    3057 
    3058         // Drafts shouldn't be assigned a date unless explicitly done so by the user
    3059         if ( isset( $post['post_status'] ) && in_array($post['post_status'], array('draft', 'pending', 'auto-draft')) && empty($postarr['edit_date']) &&
    3060                          ('0000-00-00 00:00:00' == $post['post_date_gmt']) )
    3061                 $clear_date = true;
    3062         else
    3063                 $clear_date = false;
    3064 
    3065         // Merge old and new fields with new fields overwriting old ones.
    3066         $postarr = array_merge($post, $postarr);
    3067         $postarr['post_category'] = $post_cats;
    3068         if ( $clear_date ) {
    3069                 $postarr['post_date'] = current_time('mysql');
    3070                 $postarr['post_date_gmt'] = '';
    3071         }
    3072 
    3073         if ($postarr['post_type'] == 'attachment')
    3074                 return wp_insert_attachment($postarr);
    3075 
    3076         return wp_insert_post( $postarr, $wp_error );
    3077 }
    3078 
    3079 /**
    3080  * Publish a post by transitioning the post status.
    3081  *
    3082  * @since 2.1.0
    3083  * @uses $wpdb
    3084  * @uses do_action() Calls 'edit_post', 'save_post', and 'wp_insert_post' on post_id and post data.
    3085  *
    3086  * @param mixed $post Post ID or object.
    3087  */
    3088 function wp_publish_post( $post ) {
    3089         global $wpdb;
    3090 
    3091         if ( ! $post = get_post( $post ) )
    3092                 return;
    3093 
    3094         if ( 'publish' == $post->post_status )
    3095                 return;
    3096 
    3097         $wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post->ID ) );
    3098 
    3099         clean_post_cache( $post->ID );
    3100 
    3101         $old_status = $post->post_status;
    3102         $post->post_status = 'publish';
    3103         wp_transition_post_status( 'publish', $old_status, $post );
    3104 
    3105         do_action( 'edit_post', $post->ID, $post );
    3106         do_action( 'save_post', $post->ID, $post );
    3107         do_action( 'wp_insert_post', $post->ID, $post );
    3108 }
    3109 
    3110 /**
    3111  * Publish future post and make sure post ID has future post status.
    3112  *
    3113  * Invoked by cron 'publish_future_post' event. This safeguard prevents cron
    3114  * from publishing drafts, etc.
    3115  *
    3116  * @since 2.5.0
    3117  *
    3118  * @param int $post_id Post ID.
    3119  * @return null Nothing is returned. Which can mean that no action is required or post was published.
    3120  */
    3121 function check_and_publish_future_post($post_id) {
    3122 
    3123         $post = get_post($post_id);
    3124 
    3125         if ( empty($post) )
    3126                 return;
    3127 
    3128         if ( 'future' != $post->post_status )
    3129                 return;
    3130 
    3131         $time = strtotime( $post->post_date_gmt . ' GMT' );
    3132 
    3133         if ( $time > time() ) { // Uh oh, someone jumped the gun!
    3134                 wp_clear_scheduled_hook( 'publish_future_post', array( $post_id ) ); // clear anything else in the system
    3135                 wp_schedule_single_event( $time, 'publish_future_post', array( $post_id ) );
    3136                 return;
    3137         }
    3138 
    3139         return wp_publish_post($post_id);
    3140 }
    3141 
    3142 /**
    3143  * Computes a unique slug for the post, when given the desired slug and some post details.
    3144  *
    3145  * @since 2.8.0
    3146  *
    3147  * @global wpdb $wpdb
    3148  * @global WP_Rewrite $wp_rewrite
    3149  * @param string $slug the desired slug (post_name)
    3150  * @param integer $post_ID
    3151  * @param string $post_status no uniqueness checks are made if the post is still draft or pending
    3152  * @param string $post_type
    3153  * @param integer $post_parent
    3154  * @return string unique slug for the post, based on $post_name (with a -1, -2, etc. suffix)
    3155  */
    3156 function wp_unique_post_slug( $slug, $post_ID, $post_status, $post_type, $post_parent ) {
    3157         if ( in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
    3158                 return $slug;
    3159 
    3160         global $wpdb, $wp_rewrite;
    3161 
    3162         $original_slug = $slug;
    3163 
    3164         $feeds = $wp_rewrite->feeds;
    3165         if ( ! is_array( $feeds ) )
    3166                 $feeds = array();
    3167 
    3168         $hierarchical_post_types = get_post_types( array('hierarchical' => true) );
    3169         if ( 'attachment' == $post_type ) {
    3170                 // Attachment slugs must be unique across all types.
    3171                 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND ID != %d LIMIT 1";
    3172                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID ) );
    3173 
    3174                 if ( $post_name_check || in_array( $slug, $feeds ) || apply_filters( 'wp_unique_post_slug_is_bad_attachment_slug', false, $slug ) ) {
    3175                         $suffix = 2;
    3176                         do {
    3177                                 $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
    3178                                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_ID ) );
    3179                                 $suffix++;
    3180                         } while ( $post_name_check );
    3181                         $slug = $alt_post_name;
    3182                 }
    3183         } elseif ( in_array( $post_type, $hierarchical_post_types ) ) {
    3184                 if ( 'nav_menu_item' == $post_type )
    3185                         return $slug;
    3186                 // Page slugs must be unique within their own trees. Pages are in a separate
    3187                 // namespace than posts so page slugs are allowed to overlap post slugs.
    3188                 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type IN ( '" . implode( "', '", esc_sql( $hierarchical_post_types ) ) . "' ) AND ID != %d AND post_parent = %d LIMIT 1";
    3189                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID, $post_parent ) );
    3190 
    3191                 if ( $post_name_check || in_array( $slug, $feeds ) || preg_match( "@^($wp_rewrite->pagination_base)?\d+$@", $slug )  || apply_filters( 'wp_unique_post_slug_is_bad_hierarchical_slug', false, $slug, $post_type, $post_parent ) ) {
    3192                         $suffix = 2;
    3193                         do {
    3194                                 $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
    3195                                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_ID, $post_parent ) );
    3196                                 $suffix++;
    3197                         } while ( $post_name_check );
    3198                         $slug = $alt_post_name;
    3199                 }
    3200         } else {
    3201                 // Post slugs must be unique across all posts.
    3202                 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d LIMIT 1";
    3203                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_type, $post_ID ) );
    3204 
    3205                 if ( $post_name_check || in_array( $slug, $feeds ) || apply_filters( 'wp_unique_post_slug_is_bad_flat_slug', false, $slug, $post_type ) ) {
    3206                         $suffix = 2;
    3207                         do {
    3208                                 $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
    3209                                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_type, $post_ID ) );
    3210                                 $suffix++;
    3211                         } while ( $post_name_check );
    3212                         $slug = $alt_post_name;
    3213                 }
    3214         }
    3215 
    3216         return apply_filters( 'wp_unique_post_slug', $slug, $post_ID, $post_status, $post_type, $post_parent, $original_slug );
    3217 }
    3218 
    3219 /**
    3220  * Truncates a post slug.
    3221  *
    3222  * @since 3.6.0
    3223  * @access private
    3224  * @uses utf8_uri_encode() Makes sure UTF-8 characters are properly cut and encoded.
    3225  *
    3226  * @param string $slug The slug to truncate.
    3227  * @param int $length Max length of the slug.
    3228  * @return string The truncated slug.
    3229  */
    3230 function _truncate_post_slug( $slug, $length = 200 ) {
    3231         if ( strlen( $slug ) > $length ) {
    3232                 $decoded_slug = urldecode( $slug );
    3233                 if ( $decoded_slug === $slug )
    3234                         $slug = substr( $slug, 0, $length );
    3235                 else
    3236                         $slug = utf8_uri_encode( $decoded_slug, $length );
    3237         }
    3238 
    3239         return rtrim( $slug, '-' );
    3240 }
    3241 
    3242 /**
    3243  * Adds tags to a post.
    3244  *
    3245  * @uses wp_set_post_tags() Same first two parameters, but the last parameter is always set to true.
    3246  *
    3247  * @package WordPress
    3248  * @subpackage Post
    3249  * @since 2.3.0
    3250  *
    3251  * @param int $post_id Post ID
    3252  * @param string $tags The tags to set for the post, separated by commas.
    3253  * @return bool|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
    3254  */
    3255 function wp_add_post_tags($post_id = 0, $tags = '') {
    3256         return wp_set_post_tags($post_id, $tags, true);
    3257 }
    3258 
    3259 /**
    3260  * Set the tags for a post.
    3261  *
    3262  * @since 2.3.0
    3263  * @uses wp_set_object_terms() Sets the tags for the post.
    3264  *
    3265  * @param int $post_id Post ID.
    3266  * @param string $tags The tags to set for the post, separated by commas.
    3267  * @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
    3268  * @return mixed Array of affected term IDs. WP_Error or false on failure.
    3269  */
    3270 function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
    3271         return wp_set_post_terms( $post_id, $tags, 'post_tag', $append);
    3272 }
    3273 
    3274 /**
    3275  * Set the terms for a post.
    3276  *
    3277  * @since 2.8.0
    3278  * @uses wp_set_object_terms() Sets the tags for the post.
    3279  *
    3280  * @param int $post_id Post ID.
    3281  * @param string $tags The tags to set for the post, separated by commas.
    3282  * @param string $taxonomy Taxonomy name. Defaults to 'post_tag'.
    3283  * @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
    3284  * @return mixed Array of affected term IDs. WP_Error or false on failure.
    3285  */
    3286 function wp_set_post_terms( $post_id = 0, $tags = '', $taxonomy = 'post_tag', $append = false ) {
    3287         $post_id = (int) $post_id;
    3288 
    3289         if ( !$post_id )
    3290                 return false;
    3291 
    3292         if ( empty($tags) )
    3293                 $tags = array();
    3294 
    3295         if ( ! is_array( $tags ) ) {
    3296                 $comma = _x( ',', 'tag delimiter' );
    3297                 if ( ',' !== $comma )
    3298                         $tags = str_replace( $comma, ',', $tags );
    3299                 $tags = explode( ',', trim( $tags, " \n\t\r\0\x0B," ) );
    3300         }
    3301 
    3302         // Hierarchical taxonomies must always pass IDs rather than names so that children with the same
    3303         // names but different parents aren't confused.
    3304         if ( is_taxonomy_hierarchical( $taxonomy ) ) {
    3305                 $tags = array_unique( array_map( 'intval', $tags ) );
    3306         }
    3307 
    3308         return wp_set_object_terms( $post_id, $tags, $taxonomy, $append );
    3309 }
    3310 
    3311 /**
    3312  * Set categories for a post.
    3313  *
    3314  * If the post categories parameter is not set, then the default category is
    3315  * going used.
    3316  *
    3317  * @since 2.1.0
    3318  *
    3319  * @param int $post_ID Post ID.
    3320  * @param array $post_categories Optional. List of categories.
    3321  * @return bool|mixed
    3322  */
    3323 function wp_set_post_categories($post_ID = 0, $post_categories = array()) {
    3324         $post_ID = (int) $post_ID;
    3325         $post_type = get_post_type( $post_ID );
    3326         $post_status = get_post_status( $post_ID );
    3327         // If $post_categories isn't already an array, make it one:
    3328         if ( !is_array($post_categories) || empty($post_categories) ) {
    3329                 if ( 'post' == $post_type && 'auto-draft' != $post_status )
    3330                         $post_categories = array( get_option('default_category') );
    3331                 else
    3332                         $post_categories = array();
    3333         } else if ( 1 == count($post_categories) && '' == reset($post_categories) ) {
    3334                 return true;
    3335         }
    3336 
    3337         return wp_set_post_terms($post_ID, $post_categories, 'category');
    3338 }
    3339 
    3340 /**
    3341  * Transition the post status of a post.
    3342  *
    3343  * Calls hooks to transition post status.
    3344  *
    3345  * The first is 'transition_post_status' with new status, old status, and post data.
    3346  *
    3347  * The next action called is 'OLDSTATUS_to_NEWSTATUS' the 'NEWSTATUS' is the
    3348  * $new_status parameter and the 'OLDSTATUS' is $old_status parameter; it has the
    3349  * post data.
    3350  *
    3351  * The final action is named 'NEWSTATUS_POSTTYPE', 'NEWSTATUS' is from the $new_status
    3352  * parameter and POSTTYPE is post_type post data.
    3353  *
    3354  * @since 2.3.0
    3355  * @link http://codex.wordpress.org/Post_Status_Transitions
    3356  *
    3357  * @uses do_action() Calls 'transition_post_status' on $new_status, $old_status and
    3358  *  $post if there is a status change.
    3359  * @uses do_action() Calls '{$old_status}_to_{$new_status}' on $post if there is a status change.
    3360  * @uses do_action() Calls '{$new_status}_{$post->post_type}' on post ID and $post.
    3361  *
    3362  * @param string $new_status Transition to this post status.
    3363  * @param string $old_status Previous post status.
    3364  * @param object $post Post data.
    3365  */
    3366 function wp_transition_post_status($new_status, $old_status, $post) {
    3367         do_action('transition_post_status', $new_status, $old_status, $post);
    3368         do_action("{$old_status}_to_{$new_status}", $post);
    3369         do_action("{$new_status}_{$post->post_type}", $post->ID, $post);
    3370 }
    3371 
    3372 //
    3373 // Trackback and ping functions
    3374 //
    3375 
    3376 /**
    3377  * Add a URL to those already pung.
    3378  *
    3379  * @since 1.5.0
    3380  * @uses $wpdb
    3381  *
    3382  * @param int $post_id Post ID.
    3383  * @param string $uri Ping URI.
    3384  * @return int How many rows were updated.
    3385  */
    3386 function add_ping($post_id, $uri) {
    3387         global $wpdb;
    3388         $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
    3389         $pung = trim($pung);
    3390         $pung = preg_split('/\s/', $pung);
    3391         $pung[] = $uri;
    3392         $new = implode("\n", $pung);
    3393         $new = apply_filters('add_ping', $new);
    3394         // expected_slashed ($new)
    3395         $new = stripslashes($new);
    3396         return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) );
    3397 }
    3398 
    3399 /**
    3400  * Retrieve enclosures already enclosed for a post.
    3401  *
    3402  * @since 1.5.0
    3403  * @uses $wpdb
    3404  *
    3405  * @param int $post_id Post ID.
    3406  * @return array List of enclosures
    3407  */
    3408 function get_enclosed($post_id) {
    3409         $custom_fields = get_post_custom( $post_id );
    3410         $pung = array();
    3411         if ( !is_array( $custom_fields ) )
    3412                 return $pung;
    3413 
    3414         foreach ( $custom_fields as $key => $val ) {
    3415                 if ( 'enclosure' != $key || !is_array( $val ) )
    3416                         continue;
    3417                 foreach( $val as $enc ) {
    3418                         $enclosure = explode( "\n", $enc );
    3419                         $pung[] = trim( $enclosure[ 0 ] );
    3420                 }
    3421         }
    3422         $pung = apply_filters('get_enclosed', $pung, $post_id);
    3423         return $pung;
    3424 }
    3425 
    3426 /**
    3427  * Retrieve URLs already pinged for a post.
    3428  *
    3429  * @since 1.5.0
    3430  * @uses $wpdb
    3431  *
    3432  * @param int $post_id Post ID.
    3433  * @return array
    3434  */
    3435 function get_pung($post_id) {
    3436         global $wpdb;
    3437         $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
    3438         $pung = trim($pung);
    3439         $pung = preg_split('/\s/', $pung);
    3440         $pung = apply_filters('get_pung', $pung);
    3441         return $pung;
    3442 }
    3443 
    3444 /**
    3445  * Retrieve URLs that need to be pinged.
    3446  *
    3447  * @since 1.5.0
    3448  * @uses $wpdb
    3449  *
    3450  * @param int $post_id Post ID
    3451  * @return array
    3452  */
    3453 function get_to_ping($post_id) {
    3454         global $wpdb;
    3455         $to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id ));
    3456         $to_ping = sanitize_trackback_urls( $to_ping );
    3457         $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);
    3458         $to_ping = apply_filters('get_to_ping',  $to_ping);
    3459         return $to_ping;
    3460 }
    3461 
    3462 /**
    3463  * Do trackbacks for a list of URLs.
    3464  *
    3465  * @since 1.0.0
    3466  *
    3467  * @param string $tb_list Comma separated list of URLs
    3468  * @param int $post_id Post ID
    3469  */
    3470 function trackback_url_list($tb_list, $post_id) {
    3471         if ( ! empty( $tb_list ) ) {
    3472                 // get post data
    3473                 $postdata = get_post($post_id, ARRAY_A);
    3474 
    3475                 // import postdata as variables
    3476                 extract($postdata, EXTR_SKIP);
    3477 
    3478                 // form an excerpt
    3479                 $excerpt = strip_tags($post_excerpt ? $post_excerpt : $post_content);
    3480 
    3481                 if (strlen($excerpt) > 255) {
    3482                         $excerpt = substr($excerpt,0,252) . '...';
    3483                 }
    3484 
    3485                 $trackback_urls = explode(',', $tb_list);
    3486                 foreach( (array) $trackback_urls as $tb_url) {
    3487                         $tb_url = trim($tb_url);
    3488                         trackback($tb_url, $post_title, $excerpt, $post_id);
    3489                 }
    3490         }
    3491 }
    3492 
    3493 //
    3494 // Page functions
    3495 //
    3496 
    3497 /**
    3498  * Get a list of page IDs.
    3499  *
    3500  * @since 2.0.0
    3501  * @uses $wpdb
    3502  *
    3503  * @return array List of page IDs.
    3504  */
    3505 function get_all_page_ids() {
    3506         global $wpdb;
    3507 
    3508         $page_ids = wp_cache_get('all_page_ids', 'posts');
    3509         if ( ! is_array( $page_ids ) ) {
    3510                 $page_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type = 'page'");
    3511                 wp_cache_add('all_page_ids', $page_ids, 'posts');
    3512         }
    3513 
    3514         return $page_ids;
    3515 }
    3516 
    3517 /**
    3518  * Retrieves page data given a page ID or page object.
    3519  *
    3520  * Use get_post() instead of get_page().
    3521  *
    3522  * @since 1.5.1
    3523  * @deprecated 3.5.0
    3524  *
    3525  * @param mixed $page Page object or page ID. Passed by reference.
    3526  * @param string $output What to output. OBJECT, ARRAY_A, or ARRAY_N.
    3527  * @param string $filter How the return value should be filtered.
    3528  * @return WP_Post|null WP_Post on success or null on failure
    3529  */
    3530 function get_page( $page, $output = OBJECT, $filter = 'raw') {
    3531         return get_post( $page, $output, $filter );
    3532 }
    3533 
    3534 /**
    3535  * Retrieves a page given its path.
    3536  *
    3537  * @since 2.1.0
    3538  * @uses $wpdb
    3539  *
    3540  * @param string $page_path Page path
    3541  * @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A. Default OBJECT.
    3542  * @param string $post_type Optional. Post type. Default page.
    3543  * @return WP_Post|null WP_Post on success or null on failure
    3544  */
    3545 function get_page_by_path($page_path, $output = OBJECT, $post_type = 'page') {
    3546         global $wpdb;
    3547 
    3548         $page_path = rawurlencode(urldecode($page_path));
    3549         $page_path = str_replace('%2F', '/', $page_path);
    3550         $page_path = str_replace('%20', ' ', $page_path);
    3551         $parts = explode( '/', trim( $page_path, '/' ) );
    3552         $parts = array_map( 'esc_sql', $parts );
    3553         $parts = array_map( 'sanitize_title_for_query', $parts );
    3554 
    3555         $in_string = "'". implode( "','", $parts ) . "'";
    3556         $post_type_sql = $post_type;
    3557         $wpdb->escape_by_ref( $post_type_sql );
    3558         $pages = $wpdb->get_results( "SELECT ID, post_name, post_parent, post_type FROM $wpdb->posts WHERE post_name IN ($in_string) AND (post_type = '$post_type_sql' OR post_type = 'attachment')", OBJECT_K );
    3559 
    3560         $revparts = array_reverse( $parts );
    3561 
    3562         $foundid = 0;
    3563         foreach ( (array) $pages as $page ) {
    3564                 if ( $page->post_name == $revparts[0] ) {
    3565                         $count = 0;
    3566                         $p = $page;
    3567                         while ( $p->post_parent != 0 && isset( $pages[ $p->post_parent ] ) ) {
    3568                                 $count++;
    3569                                 $parent = $pages[ $p->post_parent ];
    3570                                 if ( ! isset( $revparts[ $count ] ) || $parent->post_name != $revparts[ $count ] )
    3571                                         break;
    3572                                 $p = $parent;
    3573                         }
    3574 
    3575                         if ( $p->post_parent == 0 && $count+1 == count( $revparts ) && $p->post_name == $revparts[ $count ] ) {
    3576                                 $foundid = $page->ID;
    3577                                 if ( $page->post_type == $post_type )
    3578                                         break;
    3579                         }
    3580                 }
    3581         }
    3582 
    3583         if ( $foundid )
    3584                 return get_post( $foundid, $output );
    3585 
    3586         return null;
    3587 }
    3588 
    3589 /**
    3590  * Retrieve a page given its title.
    3591  *
    3592  * @since 2.1.0
    3593  * @uses $wpdb
    3594  *
    3595  * @param string $page_title Page title
    3596  * @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A. Default OBJECT.
    3597  * @param string $post_type Optional. Post type. Default page.
    3598  * @return WP_Post|null WP_Post on success or null on failure
    3599  */
    3600 function get_page_by_title($page_title, $output = OBJECT, $post_type = 'page' ) {
    3601         global $wpdb;
    3602         $page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type= %s", $page_title, $post_type ) );
    3603         if ( $page )
    3604                 return get_post( $page, $output );
    3605 
    3606         return null;
    3607 }
    3608 
    3609 /**
    3610  * Retrieve child pages from list of pages matching page ID.
    3611  *
    3612  * Matches against the pages parameter against the page ID. Also matches all
    3613  * children for the same to retrieve all children of a page. Does not make any
    3614  * SQL queries to get the children.
    3615  *
    3616  * @since 1.5.1
    3617  *
    3618  * @param int $page_id Page ID.
    3619  * @param array $pages List of pages' objects.
    3620  * @return array
    3621  */
    3622 function get_page_children($page_id, $pages) {
    3623         $page_list = array();
    3624         foreach ( (array) $pages as $page ) {
    3625                 if ( $page->post_parent == $page_id ) {
    3626                         $page_list[] = $page;
    3627                         if ( $children = get_page_children($page->ID, $pages) )
    3628                                 $page_list = array_merge($page_list, $children);
    3629                 }
    3630         }
    3631         return $page_list;
    3632 }
    3633 
    3634 /**
    3635  * Order the pages with children under parents in a flat list.
    3636  *
    3637  * It uses auxiliary structure to hold parent-children relationships and
    3638  * runs in O(N) complexity
    3639  *
    3640  * @since 2.0.0
    3641  *
    3642  * @param array $pages Posts array.
    3643  * @param int $page_id Parent page ID.
    3644  * @return array A list arranged by hierarchy. Children immediately follow their parents.
    3645  */
    3646 function get_page_hierarchy( &$pages, $page_id = 0 ) {
    3647         if ( empty( $pages ) ) {
    3648                 $result = array();
    3649                 return $result;
    3650         }
    3651 
    3652         $children = array();
    3653         foreach ( (array) $pages as $p ) {
    3654                 $parent_id = intval( $p->post_parent );
    3655                 $children[ $parent_id ][] = $p;
    3656         }
    3657 
    3658         $result = array();
    3659         _page_traverse_name( $page_id, $children, $result );
    3660 
    3661         return $result;
    3662 }
    3663 
    3664 /**
    3665  * function to traverse and return all the nested children post names of a root page.
    3666  * $children contains parent-children relations
    3667  *
    3668  * @since 2.9.0
    3669  */
    3670 function _page_traverse_name( $page_id, &$children, &$result ){
    3671         if ( isset( $children[ $page_id ] ) ){
    3672                 foreach( (array)$children[ $page_id ] as $child ) {
    3673                         $result[ $child->ID ] = $child->post_name;
    3674                         _page_traverse_name( $child->ID, $children, $result );
    3675                 }
    3676         }
    3677 }
    3678 
    3679 /**
    3680  * Builds URI for a page.
    3681  *
    3682  * Sub pages will be in the "directory" under the parent page post name.
    3683  *
    3684  * @since 1.5.0
    3685  *
    3686  * @param mixed $page Page object or page ID.
    3687  * @return string Page URI.
    3688  */
    3689 function get_page_uri($page) {
    3690         $page = get_post( $page );
    3691 
    3692         $uri = $page->post_name;
    3693 
    3694         foreach ( $page->ancestors as $parent ) {
    3695                 $uri = get_post( $parent )->post_name . "/" . $uri;
    3696         }
    3697 
    3698         return $uri;
    3699 }
    3700 
    3701 /**
    3702  * Retrieve a list of pages.
    3703  *
    3704  * The defaults that can be overridden are the following: 'child_of',
    3705  * 'sort_order', 'sort_column', 'post_title', 'hierarchical', 'exclude',
    3706  * 'include', 'meta_key', 'meta_value','authors', 'number', and 'offset'.
    3707  *
    3708  * @since 1.5.0
    3709  * @uses $wpdb
    3710  *
    3711  * @param mixed $args Optional. Array or string of options that overrides defaults.
    3712  * @return array List of pages matching defaults or $args
    3713  */
    3714 function get_pages($args = '') {
    3715         global $wpdb;
    3716 
    3717         $pages = false;
    3718 
    3719         $defaults = array(
    3720                 'child_of' => 0, 'sort_order' => 'ASC',
    3721                 'sort_column' => 'post_title', 'hierarchical' => 1,
    3722                 'exclude' => array(), 'include' => array(),
    3723                 'meta_key' => '', 'meta_value' => '',
    3724                 'authors' => '', 'parent' => -1, 'exclude_tree' => '',
    3725                 'number' => '', 'offset' => 0,
    3726                 'post_type' => 'page', 'post_status' => 'publish',
    3727         );
    3728 
    3729         $r = wp_parse_args( $args, $defaults );
    3730         extract( $r, EXTR_SKIP );
    3731         $number = (int) $number;
    3732         $offset = (int) $offset;
    3733 
    3734         // Make sure the post type is hierarchical
    3735         $hierarchical_post_types = get_post_types( array( 'hierarchical' => true ) );
    3736         if ( !in_array( $post_type, $hierarchical_post_types ) )
    3737                 return $pages;
    3738 
    3739         // Make sure we have a valid post status
    3740         if ( !is_array( $post_status ) )
    3741                 $post_status = explode( ',', $post_status );
    3742         if ( array_diff( $post_status, get_post_stati() ) )
    3743                 return $pages;
    3744 
    3745         // $args can be whatever, only use the args defined in defaults to compute the key
    3746         $key = md5( serialize( compact(array_keys($defaults)) ) );
    3747         $last_changed = wp_cache_get( 'last_changed', 'posts' );
    3748         if ( ! $last_changed ) {
    3749                 $last_changed = microtime();
    3750                 wp_cache_set( 'last_changed', $last_changed, 'posts' );
    3751         }
    3752 
    3753         $cache_key = "get_pages:$key:$last_changed";
    3754         if ( $cache = wp_cache_get( $cache_key, 'posts' ) ) {
    3755                 // Convert to WP_Post instances
    3756                 $pages = array_map( 'get_post', $cache );
    3757                 $pages = apply_filters('get_pages', $pages, $r);
    3758                 return $pages;
    3759         }
    3760 
    3761         if ( !is_array($cache) )
    3762                 $cache = array();
    3763 
    3764         $inclusions = '';
    3765         if ( !empty($include) ) {
    3766                 $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include
    3767                 $parent = -1;
    3768                 $exclude = '';
    3769                 $meta_key = '';
    3770                 $meta_value = '';
    3771                 $hierarchical = false;
    3772                 $incpages = wp_parse_id_list( $include );
    3773                 if ( ! empty( $incpages ) ) {
    3774                         foreach ( $incpages as $incpage ) {
    3775                                 if (empty($inclusions))
    3776                                         $inclusions = $wpdb->prepare(' AND ( ID = %d ', $incpage);
    3777                                 else
    3778                                         $inclusions .= $wpdb->prepare(' OR ID = %d ', $incpage);
    3779                         }
    3780                 }
    3781         }
    3782         if (!empty($inclusions))
    3783                 $inclusions .= ')';
    3784 
    3785         $exclusions = '';
    3786         if ( !empty($exclude) ) {
    3787                 $expages = wp_parse_id_list( $exclude );
    3788                 if ( ! empty( $expages ) ) {
    3789                         foreach ( $expages as $expage ) {
    3790                                 if (empty($exclusions))
    3791                                         $exclusions = $wpdb->prepare(' AND ( ID <> %d ', $expage);
    3792                                 else
    3793                                         $exclusions .= $wpdb->prepare(' AND ID <> %d ', $expage);
    3794                         }
    3795                 }
    3796         }
    3797         if (!empty($exclusions))
    3798                 $exclusions .= ')';
    3799 
    3800         $author_query = '';
    3801         if (!empty($authors)) {
    3802                 $post_authors = preg_split('/[\s,]+/',$authors);
    3803 
    3804                 if ( ! empty( $post_authors ) ) {
    3805                         foreach ( $post_authors as $post_author ) {
    3806                                 //Do we have an author id or an author login?
    3807                                 if ( 0 == intval($post_author) ) {
    3808                                         $post_author = get_user_by('login', $post_author);
    3809                                         if ( empty($post_author) )
    3810                                                 continue;
    3811                                         if ( empty($post_author->ID) )
    3812                                                 continue;
    3813                                         $post_author = $post_author->ID;
    3814                                 }
    3815 
    3816                                 if ( '' == $author_query )
    3817                                         $author_query = $wpdb->prepare(' post_author = %d ', $post_author);
    3818                                 else
    3819                                         $author_query .= $wpdb->prepare(' OR post_author = %d ', $post_author);
    3820                         }
    3821                         if ( '' != $author_query )
    3822                                 $author_query = " AND ($author_query)";
    3823                 }
    3824         }
    3825 
    3826         $join = '';
    3827         $where = "$exclusions $inclusions ";
    3828         if ( ! empty( $meta_key ) || ! empty( $meta_value ) ) {
    3829                 $join = " LEFT JOIN $wpdb->postmeta ON ( $wpdb->posts.ID = $wpdb->postmeta.post_id )";
    3830 
    3831                 if ( ! empty( $meta_key ) )
    3832                         $where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_key = %s", $meta_key);
    3833                 if ( ! empty( $meta_value ) )
    3834                         $where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_value = %s", $meta_value);
    3835 
    3836         }
    3837 
    3838         if ( $parent >= 0 )
    3839                 $where .= $wpdb->prepare(' AND post_parent = %d ', $parent);
    3840 
    3841         if ( 1 == count( $post_status ) ) {
    3842                 $where_post_type = $wpdb->prepare( "post_type = %s AND post_status = %s", $post_type, array_shift( $post_status ) );
    3843         } else {
    3844                 $post_status = implode( "', '", $post_status );
    3845                 $where_post_type = $wpdb->prepare( "post_type = %s AND post_status IN ('$post_status')", $post_type );
    3846         }
    3847 
    3848         $orderby_array = array();
    3849         $allowed_keys = array('author', 'post_author', 'date', 'post_date', 'title', 'post_title', 'name', 'post_name', 'modified',
    3850                                                   'post_modified', 'modified_gmt', 'post_modified_gmt', 'menu_order', 'parent', 'post_parent',
    3851                                                   'ID', 'rand', 'comment_count');
    3852         foreach ( explode( ',', $sort_column ) as $orderby ) {
    3853                 $orderby = trim( $orderby );
    3854                 if ( !in_array( $orderby, $allowed_keys ) )
    3855                         continue;
    3856 
    3857                 switch ( $orderby ) {
    3858                         case 'menu_order':
    3859                                 break;
    3860                         case 'ID':
    3861                                 $orderby = "$wpdb->posts.ID";
    3862                                 break;
    3863                         case 'rand':
    3864                                 $orderby = 'RAND()';
    3865                                 break;
    3866                         case 'comment_count':
    3867                                 $orderby = "$wpdb->posts.comment_count";
    3868                                 break;
    3869                         default:
    3870                                 if ( 0 === strpos( $orderby, 'post_' ) )
    3871                                         $orderby = "$wpdb->posts." . $orderby;
    3872                                 else
    3873                                         $orderby = "$wpdb->posts.post_" . $orderby;
    3874                 }
    3875 
    3876                 $orderby_array[] = $orderby;
    3877 
    3878         }
    3879         $sort_column = ! empty( $orderby_array ) ? implode( ',', $orderby_array ) : "$wpdb->posts.post_title";
    3880 
    3881         $sort_order = strtoupper( $sort_order );
    3882         if ( '' !== $sort_order && !in_array( $sort_order, array( 'ASC', 'DESC' ) ) )
    3883                 $sort_order = 'ASC';
    3884 
    3885         $query = "SELECT * FROM $wpdb->posts $join WHERE ($where_post_type) $where ";
    3886         $query .= $author_query;
    3887         $query .= " ORDER BY " . $sort_column . " " . $sort_order ;
    3888 
    3889         if ( !empty($number) )
    3890                 $query .= ' LIMIT ' . $offset . ',' . $number;
    3891 
    3892         $pages = $wpdb->get_results($query);
    3893 
    3894         if ( empty($pages) ) {
    3895                 $pages = apply_filters('get_pages', array(), $r);
    3896                 return $pages;
    3897         }
    3898 
    3899         // Sanitize before caching so it'll only get done once
    3900         $num_pages = count($pages);
    3901         for ($i = 0; $i < $num_pages; $i++) {
    3902                 $pages[$i] = sanitize_post($pages[$i], 'raw');
    3903         }
    3904 
    3905         // Update cache.
    3906         update_post_cache( $pages );
    3907 
    3908         if ( $child_of || $hierarchical )
    3909                 $pages = get_page_children($child_of, $pages);
    3910 
    3911         if ( !empty($exclude_tree) ) {
    3912                 $exclude = (int) $exclude_tree;
    3913                 $children = get_page_children($exclude, $pages);
    3914                 $excludes = array();
    3915                 foreach ( $children as $child )
    3916                         $excludes[] = $child->ID;
    3917                 $excludes[] = $exclude;
    3918                 $num_pages = count($pages);
    3919                 for ( $i = 0; $i < $num_pages; $i++ ) {
    3920                         if ( in_array($pages[$i]->ID, $excludes) )
    3921                                 unset($pages[$i]);
    3922                 }
    3923         }
    3924 
    3925         $page_structure = array();
    3926         foreach ( $pages as $page )
    3927                 $page_structure[] = $page->ID;
    3928 
    3929         wp_cache_set( $cache_key, $page_structure, 'posts' );
    3930 
    3931         // Convert to WP_Post instances
    3932         $pages = array_map( 'get_post', $pages );
    3933 
    3934         $pages = apply_filters('get_pages', $pages, $r);
    3935 
    3936         return $pages;
    3937 }
    3938 
    3939 //
    3940 // Attachment functions
    3941 //
    3942 
    3943 /**
    3944  * Check if the attachment URI is local one and is really an attachment.
    3945  *
    3946  * @since 2.0.0
    3947  *
    3948  * @param string $url URL to check
    3949  * @return bool True on success, false on failure.
    3950  */
    3951 function is_local_attachment($url) {
    3952         if (strpos($url, home_url()) === false)
    3953                 return false;
    3954         if (strpos($url, home_url('/?attachment_id=')) !== false)
    3955                 return true;
    3956         if ( $id = url_to_postid($url) ) {
    3957                 $post = get_post($id);
    3958                 if ( 'attachment' == $post->post_type )
    3959                         return true;
    3960         }
    3961         return false;
    3962 }
    3963 
    3964 /**
    3965  * Insert an attachment.
    3966  *
    3967  * If you set the 'ID' in the $object parameter, it will mean that you are
    3968  * updating and attempt to update the attachment. You can also set the
    3969  * attachment name or title by setting the key 'post_name' or 'post_title'.
    3970  *
    3971  * You can set the dates for the attachment manually by setting the 'post_date'
    3972  * and 'post_date_gmt' keys' values.
    3973  *
    3974  * By default, the comments will use the default settings for whether the
    3975  * comments are allowed. You can close them manually or keep them open by
    3976  * setting the value for the 'comment_status' key.
    3977  *
    3978  * The $object parameter can have the following:
    3979  *     'post_status'   - Default is 'draft'. Can not be overridden, set the same as parent post.
    3980  *     'post_type'     - Default is 'post', will be set to attachment. Can not override.
    3981  *     'post_author'   - Default is current user ID. The ID of the user, who added the attachment.
    3982  *     'ping_status'   - Default is the value in default ping status option. Whether the attachment
    3983  *                       can accept pings.
    3984  *     'post_parent'   - Default is 0. Can use $parent parameter or set this for the post it belongs
    3985  *                       to, if any.
    3986  *     'menu_order'    - Default is 0. The order it is displayed.
    3987  *     'to_ping'       - Whether to ping.
    3988  *     'pinged'        - Default is empty string.
    3989  *     'post_password' - Default is empty string. The password to access the attachment.
    3990  *     'guid'          - Global Unique ID for referencing the attachment.
    3991  *     'post_content_filtered' - Attachment post content filtered.
    3992  *     'post_excerpt'  - Attachment excerpt.
    3993  *
    3994  * @since 2.0.0
    3995  * @uses $wpdb
    3996  * @uses $user_ID
    3997  * @uses do_action() Calls 'edit_attachment' on $post_ID if this is an update.
    3998  * @uses do_action() Calls 'add_attachment' on $post_ID if this is not an update.
    3999  *
    4000  * @param string|array $object Arguments to override defaults.
    4001  * @param string $file Optional filename.
    4002  * @param int $parent Parent post ID.
    4003  * @return int Attachment ID.
    4004  */
    4005 function wp_insert_attachment($object, $file = false, $parent = 0) {
    4006         global $wpdb, $user_ID;
    4007 
    4008         $defaults = array('post_status' => 'inherit', 'post_type' => 'post', 'post_author' => $user_ID,
    4009                 'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
    4010                 'menu_order' => 0, 'to_ping' =>  '', 'pinged' => '', 'post_password' => '',
    4011                 'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0, 'context' => '');
    4012 
    4013         $object = wp_parse_args($object, $defaults);
    4014         if ( !empty($parent) )
    4015                 $object['post_parent'] = $parent;
    4016 
    4017         unset( $object[ 'filter' ] );
    4018 
    4019         $object = sanitize_post($object, 'db');
    4020 
    4021         // export array as variables
    4022         extract($object, EXTR_SKIP);
    4023 
    4024         if ( empty($post_author) )
    4025                 $post_author = $user_ID;
    4026 
    4027         $post_type = 'attachment';
    4028 
    4029         if ( ! in_array( $post_status, array( 'inherit', 'private' ) ) )
    4030                 $post_status = 'inherit';
    4031 
    4032         if ( !empty($post_category) )
    4033                 $post_category = array_filter($post_category); // Filter out empty terms
    4034 
    4035         // Make sure we set a valid category.
    4036         if ( empty($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
    4037                 $post_category = array();
    4038         }
    4039 
    4040         // Are we updating or creating?
    4041         if ( !empty($ID) ) {
    4042                 $update = true;
    4043                 $post_ID = (int) $ID;
    4044         } else {
    4045                 $update = false;
    4046                 $post_ID = 0;
    4047         }
    4048 
    4049         // Create a valid post name.
    4050         if ( empty($post_name) )
    4051                 $post_name = sanitize_title($post_title);
    4052         else
    4053                 $post_name = sanitize_title($post_name);
    4054 
    4055         $post_name = wp_unique_post_slug($post_name, $post_ID, $post_status, $post_type, $post_parent);
    4056 
    4057         if ( empty($post_date) )
    4058                 $post_date = current_time('mysql');
    4059         if ( empty($post_date_gmt) )
    4060                 $post_date_gmt = current_time('mysql', 1);
    4061 
    4062         if ( empty($post_modified) )
    4063                 $post_modified = $post_date;
    4064         if ( empty($post_modified_gmt) )
    4065                 $post_modified_gmt = $post_date_gmt;
    4066 
    4067         if ( empty($comment_status) ) {
    4068                 if ( $update )
    4069                         $comment_status = 'closed';
    4070                 else
    4071                         $comment_status = get_option('default_comment_status');
    4072         }
    4073         if ( empty($ping_status) )
    4074                 $ping_status = get_option('default_ping_status');
    4075 
    4076         if ( isset($to_ping) )
    4077                 $to_ping = preg_replace('|\s+|', "\n", $to_ping);
    4078         else
    4079                 $to_ping = '';
    4080 
    4081         if ( isset($post_parent) )
    4082                 $post_parent = (int) $post_parent;
    4083         else
    4084                 $post_parent = 0;
    4085 
    4086         if ( isset($menu_order) )
    4087                 $menu_order = (int) $menu_order;
    4088         else
    4089                 $menu_order = 0;
    4090 
    4091         if ( !isset($post_password) )
    4092                 $post_password = '';
    4093 
    4094         if ( ! isset($pinged) )
    4095                 $pinged = '';
    4096 
    4097         $data = compact( array( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_content_filtered', 'post_title', 'post_excerpt', 'post_status', 'post_type', 'comment_status', 'ping_status', 'post_password', 'post_name', 'to_ping', 'pinged', 'post_modified', 'post_modified_gmt', 'post_parent', 'menu_order', 'post_mime_type', 'guid' ) );
    4098 
    4099         if ( $update ) {
    4100                 $wpdb->update( $wpdb->posts, $data, array( 'ID' => $post_ID ) );
    4101         } else {
    4102                 // If there is a suggested ID, use it if not already present
    4103                 if ( !empty($import_id) ) {
    4104                         $import_id = (int) $import_id;
    4105                         if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
    4106                                 $data['ID'] = $import_id;
    4107                         }
    4108                 }
    4109 
    4110                 $wpdb->insert( $wpdb->posts, $data );
    4111                 $post_ID = (int) $wpdb->insert_id;
    4112         }
    4113 
    4114         if ( empty($post_name) ) {
    4115                 $post_name = sanitize_title($post_title, $post_ID);
    4116                 $wpdb->update( $wpdb->posts, compact("post_name"), array( 'ID' => $post_ID ) );
    4117         }
    4118 
    4119         if ( is_object_in_taxonomy($post_type, 'category') )
    4120                 wp_set_post_categories( $post_ID, $post_category );
    4121 
    4122         if ( isset( $tags_input ) && is_object_in_taxonomy($post_type, 'post_tag') )
    4123                 wp_set_post_tags( $post_ID, $tags_input );
    4124 
    4125         // support for all custom taxonomies
    4126         if ( !empty($tax_input) ) {
    4127                 foreach ( $tax_input as $taxonomy => $tags ) {
    4128                         $taxonomy_obj = get_taxonomy($taxonomy);
    4129                         if ( is_array($tags) ) // array = hierarchical, string = non-hierarchical.
    4130                                 $tags = array_filter($tags);
    4131                         if ( current_user_can($taxonomy_obj->cap->assign_terms) )
    4132                                 wp_set_post_terms( $post_ID, $tags, $taxonomy );
    4133                 }
    4134         }
    4135 
    4136         if ( $file )
    4137                 update_attached_file( $post_ID, $file );
    4138 
    4139         clean_post_cache( $post_ID );
    4140 
    4141         if ( ! empty( $context ) )
    4142                 wp_add_post_meta( $post_ID, '_wp_attachment_context', $context, true );
    4143 
    4144         if ( $update) {
    4145                 do_action('edit_attachment', $post_ID);
    4146         } else {
    4147                 do_action('add_attachment', $post_ID);
    4148         }
    4149 
    4150         return $post_ID;
    4151 }
    4152 
    4153 /**
    4154  * Trashes or deletes an attachment.
    4155  *
    4156  * When an attachment is permanently deleted, the file will also be removed.
    4157  * Deletion removes all post meta fields, taxonomy, comments, etc. associated
    4158  * with the attachment (except the main post).
    4159  *
    4160  * The attachment is moved to the trash instead of permanently deleted unless trash
    4161  * for media is disabled, item is already in the trash, or $force_delete is true.
    4162  *
    4163  * @since 2.0.0
    4164  * @uses $wpdb
    4165  * @uses do_action() Calls 'delete_attachment' hook on Attachment ID.
    4166  *
    4167  * @param int $post_id Attachment ID.
    4168  * @param bool $force_delete Whether to bypass trash and force deletion. Defaults to false.
    4169  * @return mixed False on failure. Post data on success.
    4170  */
    4171 function wp_delete_attachment( $post_id, $force_delete = false ) {
    4172         global $wpdb;
    4173 
    4174         if ( !$post = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id) ) )
    4175                 return $post;
    4176 
    4177         if ( 'attachment' != $post->post_type )
    4178                 return false;
    4179 
    4180         if ( !$force_delete && EMPTY_TRASH_DAYS && MEDIA_TRASH && 'trash' != $post->post_status )
    4181                 return wp_trash_post( $post_id );
    4182 
    4183         delete_post_meta($post_id, '_wp_trash_meta_status');
    4184         delete_post_meta($post_id, '_wp_trash_meta_time');
    4185 
    4186         $meta = wp_get_attachment_metadata( $post_id );
    4187         $backup_sizes = get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true );
    4188         $file = get_attached_file( $post_id );
    4189 
    4190         $intermediate_sizes = array();
    4191         foreach ( get_intermediate_image_sizes() as $size ) {
    4192                 if ( $intermediate = image_get_intermediate_size( $post_id, $size ) )
    4193                         $intermediate_sizes[] = $intermediate;
    4194         }
    4195 
    4196         if ( is_multisite() )
    4197                 delete_transient( 'dirsize_cache' );
    4198 
    4199         do_action('delete_attachment', $post_id);
    4200 
    4201         wp_delete_object_term_relationships($post_id, array('category', 'post_tag'));
    4202         wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type));
    4203 
    4204         delete_metadata( 'post', null, '_thumbnail_id', $post_id, true ); // delete all for any posts.
    4205 
    4206         $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ));
    4207         foreach ( $comment_ids as $comment_id )
    4208                 wp_delete_comment( $comment_id, true );
    4209 
    4210         $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id ));
    4211         foreach ( $post_meta_ids as $mid )
    4212                 delete_metadata_by_mid( 'post', $mid );
    4213 
    4214         do_action( 'delete_post', $post_id );
    4215         $wpdb->delete( $wpdb->posts, array( 'ID' => $post_id ) );
    4216         do_action( 'deleted_post', $post_id );
    4217 
    4218         $uploadpath = wp_upload_dir();
    4219 
    4220         if ( ! empty($meta['thumb']) ) {
    4221                 // Don't delete the thumb if another attachment uses it
    4222                 if (! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $meta['thumb'] . '%', $post_id)) ) {
    4223                         $thumbfile = str_replace(basename($file), $meta['thumb'], $file);
    4224                         $thumbfile = apply_filters('wp_delete_file', $thumbfile);
    4225                         @ unlink( path_join($uploadpath['basedir'], $thumbfile) );
    4226                 }
    4227         }
    4228 
    4229         // remove intermediate and backup images if there are any
    4230         foreach ( $intermediate_sizes as $intermediate ) {
    4231                 $intermediate_file = apply_filters( 'wp_delete_file', $intermediate['path'] );
    4232                 @ unlink( path_join($uploadpath['basedir'], $intermediate_file) );
    4233         }
    4234 
    4235         if ( is_array($backup_sizes) ) {
    4236                 foreach ( $backup_sizes as $size ) {
    4237                         $del_file = path_join( dirname($meta['file']), $size['file'] );
    4238                         $del_file = apply_filters('wp_delete_file', $del_file);
    4239                         @ unlink( path_join($uploadpath['basedir'], $del_file) );
    4240                 }
    4241         }
    4242 
    4243         $file = apply_filters('wp_delete_file', $file);
    4244 
    4245         if ( ! empty($file) )
    4246                 @ unlink($file);
    4247 
    4248         clean_post_cache( $post );
    4249 
    4250         return $post;
    4251 }
    4252 
    4253 /**
    4254  * Retrieve attachment meta field for attachment ID.
    4255  *
    4256  * @since 2.1.0
    4257  *
    4258  * @param int $post_id Attachment ID
    4259  * @param bool $unfiltered Optional, default is false. If true, filters are not run.
    4260  * @return string|bool Attachment meta field. False on failure.
    4261  */
    4262 function wp_get_attachment_metadata( $post_id = 0, $unfiltered = false ) {
    4263         $post_id = (int) $post_id;
    4264         if ( !$post = get_post( $post_id ) )
    4265                 return false;
    4266 
    4267         $data = get_post_meta( $post->ID, '_wp_attachment_metadata', true );
    4268 
    4269         if ( $unfiltered )
    4270                 return $data;
    4271 
    4272         return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID );
    4273 }
    4274 
    4275 /**
    4276  * Update metadata for an attachment.
    4277  *
    4278  * @since 2.1.0
    4279  *
    4280  * @param int $post_id Attachment ID.
    4281  * @param array $data Attachment data.
    4282  * @return int
    4283  */
    4284 function wp_update_attachment_metadata( $post_id, $data ) {
    4285         $post_id = (int) $post_id;
    4286         if ( !$post = get_post( $post_id ) )
    4287                 return false;
    4288 
    4289         if ( $data = apply_filters( 'wp_update_attachment_metadata', $data, $post->ID ) )
    4290                 return update_post_meta( $post->ID, '_wp_attachment_metadata', $data );
    4291         else
    4292                 return delete_post_meta( $post->ID, '_wp_attachment_metadata' );
    4293 }
    4294 
    4295 /**
    4296  * Retrieve the URL for an attachment.
    4297  *
    4298  * @since 2.1.0
    4299  *
    4300  * @param int $post_id Attachment ID.
    4301  * @return string
    4302  */
    4303 function wp_get_attachment_url( $post_id = 0 ) {
    4304         $post_id = (int) $post_id;
    4305         if ( !$post = get_post( $post_id ) )
    4306                 return false;
    4307 
    4308         if ( 'attachment' != $post->post_type )
    4309                 return false;
    4310 
    4311         $url = '';
    4312         if ( $file = get_post_meta( $post->ID, '_wp_attached_file', true) ) { //Get attached file
    4313                 if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { //Get upload directory
    4314                         if ( 0 === strpos($file, $uploads['basedir']) ) //Check that the upload base exists in the file location
    4315                                 $url = str_replace($uploads['basedir'], $uploads['baseurl'], $file); //replace file location with url location
    4316                         elseif ( false !== strpos($file, 'wp-content/uploads') )
    4317                                 $url = $uploads['baseurl'] . substr( $file, strpos($file, 'wp-content/uploads') + 18 );
    4318                         else
    4319                                 $url = $uploads['baseurl'] . "/$file"; //Its a newly uploaded file, therefor $file is relative to the basedir.
    4320                 }
    4321         }
    4322 
    4323         if ( empty($url) ) //If any of the above options failed, Fallback on the GUID as used pre-2.7, not recommended to rely upon this.
    4324                 $url = get_the_guid( $post->ID );
    4325 
    4326         $url = apply_filters( 'wp_get_attachment_url', $url, $post->ID );
    4327 
    4328         if ( empty( $url ) )
    4329                 return false;
    4330 
    4331         return $url;
    4332 }
    4333 
    4334 /**
    4335  * Retrieve thumbnail for an attachment.
    4336  *
    4337  * @since 2.1.0
    4338  *
    4339  * @param int $post_id Attachment ID.
    4340  * @return mixed False on failure. Thumbnail file path on success.
    4341  */
    4342 function wp_get_attachment_thumb_file( $post_id = 0 ) {
    4343         $post_id = (int) $post_id;
    4344         if ( !$post = get_post( $post_id ) )
    4345                 return false;
    4346         if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) )
    4347                 return false;
    4348 
    4349         $file = get_attached_file( $post->ID );
    4350 
    4351         if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) )
    4352                 return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID );
    4353         return false;
    4354 }
    4355 
    4356 /**
    4357  * Retrieve URL for an attachment thumbnail.
    4358  *
    4359  * @since 2.1.0
    4360  *
    4361  * @param int $post_id Attachment ID
    4362  * @return string|bool False on failure. Thumbnail URL on success.
    4363  */
    4364 function wp_get_attachment_thumb_url( $post_id = 0 ) {
    4365         $post_id = (int) $post_id;
    4366         if ( !$post = get_post( $post_id ) )
    4367                 return false;
    4368         if ( !$url = wp_get_attachment_url( $post->ID ) )
    4369                 return false;
    4370 
    4371         $sized = image_downsize( $post_id, 'thumbnail' );
    4372         if ( $sized )
    4373                 return $sized[0];
    4374 
    4375         if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
    4376                 return false;
    4377 
    4378         $url = str_replace(basename($url), basename($thumb), $url);
    4379 
    4380         return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
    4381 }
    4382 
    4383 /**
    4384  * Check if the attachment is an image.
    4385  *
    4386  * @since 2.1.0
    4387  *
    4388  * @param int $post_id Attachment ID
    4389  * @return bool
    4390  */
    4391 function wp_attachment_is_image( $post_id = 0 ) {
    4392         $post_id = (int) $post_id;
    4393         if ( !$post = get_post( $post_id ) )
    4394                 return false;
    4395 
    4396         if ( !$file = get_attached_file( $post->ID ) )
    4397                 return false;
    4398 
    4399         $ext = preg_match('/\.([^.]+)$/', $file, $matches) ? strtolower($matches[1]) : false;
    4400 
    4401         $image_exts = array( 'jpg', 'jpeg', 'jpe', 'gif', 'png' );
    4402 
    4403         if ( 'image/' == substr($post->post_mime_type, 0, 6) || $ext && 'import' == $post->post_mime_type && in_array($ext, $image_exts) )
    4404                 return true;
    4405         return false;
    4406 }
    4407 
    4408 /**
    4409  * Retrieve the icon for a MIME type.
    4410  *
    4411  * @since 2.1.0
    4412  *
    4413  * @param string|int $mime MIME type or attachment ID.
    4414  * @return string|bool
    4415  */
    4416 function wp_mime_type_icon( $mime = 0 ) {
    4417         if ( !is_numeric($mime) )
    4418                 $icon = wp_cache_get("mime_type_icon_$mime");
    4419 
    4420         $post_id = 0;
    4421         if ( empty($icon) ) {
    4422                 $post_mimes = array();
    4423                 if ( is_numeric($mime) ) {
    4424                         $mime = (int) $mime;
    4425                         if ( $post = get_post( $mime ) ) {
    4426                                 $post_id = (int) $post->ID;
    4427                                 $ext = preg_replace('/^.+?\.([^.]+)$/', '$1', $post->guid);
    4428                                 if ( !empty($ext) ) {
    4429                                         $post_mimes[] = $ext;
    4430                                         if ( $ext_type = wp_ext2type( $ext ) )
    4431                                                 $post_mimes[] = $ext_type;
    4432                                 }
    4433                                 $mime = $post->post_mime_type;
    4434                         } else {
    4435                                 $mime = 0;
    4436                         }
    4437                 } else {
    4438                         $post_mimes[] = $mime;
    4439                 }
    4440 
    4441                 $icon_files = wp_cache_get('icon_files');
    4442 
    4443                 if ( !is_array($icon_files) ) {
    4444                         $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
    4445                         $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url('images/crystal') );
    4446                         $dirs = apply_filters( 'icon_dirs', array($icon_dir => $icon_dir_uri) );
    4447                         $icon_files = array();
    4448                         while ( $dirs ) {
    4449                                 $keys = array_keys( $dirs );
    4450                                 $dir = array_shift( $keys );
    4451                                 $uri = array_shift($dirs);
    4452                                 if ( $dh = opendir($dir) ) {
    4453                                         while ( false !== $file = readdir($dh) ) {
    4454                                                 $file = basename($file);
    4455                                                 if ( substr($file, 0, 1) == '.' )
    4456                                                         continue;
    4457                                                 if ( !in_array(strtolower(substr($file, -4)), array('.png', '.gif', '.jpg') ) ) {
    4458                                                         if ( is_dir("$dir/$file") )
    4459                                                                 $dirs["$dir/$file"] = "$uri/$file";
    4460                                                         continue;
    4461                                                 }
    4462                                                 $icon_files["$dir/$file"] = "$uri/$file";
    4463                                         }
    4464                                         closedir($dh);
    4465                                 }
    4466                         }
    4467                         wp_cache_add( 'icon_files', $icon_files, 'default', 600 );
    4468                 }
    4469 
    4470                 // Icon basename - extension = MIME wildcard
    4471                 foreach ( $icon_files as $file => $uri )
    4472                         $types[ preg_replace('/^([^.]*).*$/', '$1', basename($file)) ] =& $icon_files[$file];
    4473 
    4474                 if ( ! empty($mime) ) {
    4475                         $post_mimes[] = substr($mime, 0, strpos($mime, '/'));
    4476                         $post_mimes[] = substr($mime, strpos($mime, '/') + 1);
    4477                         $post_mimes[] = str_replace('/', '_', $mime);
    4478                 }
    4479 
    4480                 $matches = wp_match_mime_types(array_keys($types), $post_mimes);
    4481                 $matches['default'] = array('default');
    4482 
    4483                 foreach ( $matches as $match => $wilds ) {
    4484                         if ( isset($types[$wilds[0]])) {
    4485                                 $icon = $types[$wilds[0]];
    4486                                 if ( !is_numeric($mime) )
    4487                                         wp_cache_add("mime_type_icon_$mime", $icon);
    4488                                 break;
    4489                         }
    4490                 }
    4491         }
    4492 
    4493         return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id ); // Last arg is 0 if function pass mime type.
    4494 }
    4495 
    4496 /**
    4497  * Checked for changed slugs for published post objects and save the old slug.
    4498  *
    4499  * The function is used when a post object of any type is updated,
    4500  * by comparing the current and previous post objects.
    4501  *
    4502  * If the slug was changed and not already part of the old slugs then it will be
    4503  * added to the post meta field ('_wp_old_slug') for storing old slugs for that
    4504  * post.
    4505  *
    4506  * The most logically usage of this function is redirecting changed post objects, so
    4507  * that those that linked to an changed post will be redirected to the new post.
    4508  *
    4509  * @since 2.1.0
    4510  *
    4511  * @param int $post_id Post ID.
    4512  * @param object $post The Post Object
    4513  * @param object $post_before The Previous Post Object
    4514  * @return int Same as $post_id
    4515  */
    4516 function wp_check_for_changed_slugs($post_id, $post, $post_before) {
    4517         // dont bother if it hasnt changed
    4518         if ( $post->post_name == $post_before->post_name )
    4519                 return;
    4520 
    4521         // we're only concerned with published, non-hierarchical objects
    4522         if ( $post->post_status != 'publish' || is_post_type_hierarchical( $post->post_type ) )
    4523                 return;
    4524 
    4525         $old_slugs = (array) get_post_meta($post_id, '_wp_old_slug');
    4526 
    4527         // if we haven't added this old slug before, add it now
    4528         if ( !empty( $post_before->post_name ) && !in_array($post_before->post_name, $old_slugs) )
    4529                 wp_add_post_meta($post_id, '_wp_old_slug', $post_before->post_name);
    4530 
    4531         // if the new slug was used previously, delete it from the list
    4532         if ( in_array($post->post_name, $old_slugs) )
    4533                 delete_post_meta($post_id, '_wp_old_slug', $post->post_name);
    4534 }
    4535 
    4536 /**
    4537  * Retrieve the private post SQL based on capability.
    4538  *
    4539  * This function provides a standardized way to appropriately select on the
    4540  * post_status of a post type. The function will return a piece of SQL code
    4541  * that can be added to a WHERE clause; this SQL is constructed to allow all
    4542  * published posts, and all private posts to which the user has access.
    4543  *
    4544  * @since 2.2.0
    4545  *
    4546  * @uses $user_ID
    4547  *
    4548  * @param string $post_type currently only supports 'post' or 'page'.
    4549  * @return string SQL code that can be added to a where clause.
    4550  */
    4551 function get_private_posts_cap_sql( $post_type ) {
    4552         return get_posts_by_author_sql( $post_type, false );
    4553 }
    4554 
    4555 /**
    4556  * Retrieve the post SQL based on capability, author, and type.
    4557  *
    4558  * @see get_private_posts_cap_sql() for full description.
    4559  *
    4560  * @since 3.0.0
    4561  * @param string $post_type Post type.
    4562  * @param bool $full Optional. Returns a full WHERE statement instead of just an 'andalso' term.
    4563  * @param int $post_author Optional. Query posts having a single author ID.
    4564  * @param bool $public_only Optional. Only return public posts. Skips cap checks for $current_user.  Default is false.
    4565  * @return string SQL WHERE code that can be added to a query.
    4566  */
    4567 function get_posts_by_author_sql( $post_type, $full = true, $post_author = null, $public_only = false ) {
    4568         global $user_ID, $wpdb;
    4569 
    4570         // Private posts
    4571         $post_type_obj = get_post_type_object( $post_type );
    4572         if ( ! $post_type_obj )
    4573                 return $full ? 'WHERE 1 = 0' : ' 1 = 0 ';
    4574 
    4575         // This hook is deprecated. Why you'd want to use it, I dunno.
    4576         if ( ! $cap = apply_filters( 'pub_priv_sql_capability', '' ) )
    4577                 $cap = $post_type_obj->cap->read_private_posts;
    4578 
    4579         if ( $full ) {
    4580                 if ( null === $post_author ) {
    4581                         $sql = $wpdb->prepare( 'WHERE post_type = %s AND ', $post_type );
    4582                 } else {
    4583                         $sql = $wpdb->prepare( 'WHERE post_author = %d AND post_type = %s AND ', $post_author, $post_type );
    4584                 }
    4585         } else {
    4586                 $sql = '';
    4587         }
    4588 
    4589         $sql .= "(post_status = 'publish'";
    4590 
    4591         // Only need to check the cap if $public_only is false
    4592         if ( false === $public_only ) {
    4593                 if ( current_user_can( $cap ) ) {
    4594                         // Does the user have the capability to view private posts? Guess so.
    4595                         $sql .= " OR post_status = 'private'";
    4596                 } elseif ( is_user_logged_in() ) {
    4597                         // Users can view their own private posts.
    4598                         $id = (int) $user_ID;
    4599                         if ( null === $post_author || ! $full ) {
    4600                                 $sql .= " OR post_status = 'private' AND post_author = $id";
    4601                         } elseif ( $id == (int) $post_author ) {
    4602                                 $sql .= " OR post_status = 'private'";
    4603                         } // else none
    4604                 } // else none
    4605         }
    4606 
    4607         $sql .= ')';
    4608 
    4609         return $sql;
    4610 }
    4611 
    4612 /**
    4613  * Retrieve the date that the last post was published.
    4614  *
    4615  * The server timezone is the default and is the difference between GMT and
    4616  * server time. The 'blog' value is the date when the last post was posted. The
    4617  * 'gmt' is when the last post was posted in GMT formatted date.
    4618  *
    4619  * @since 0.71
    4620  *
    4621  * @uses apply_filters() Calls 'get_lastpostdate' filter
    4622  *
    4623  * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
    4624  * @return string The date of the last post.
    4625  */
    4626 function get_lastpostdate($timezone = 'server') {
    4627         return apply_filters( 'get_lastpostdate', _get_last_post_time( $timezone, 'date' ), $timezone );
    4628 }
    4629 
    4630 /**
    4631  * Retrieve last post modified date depending on timezone.
    4632  *
    4633  * The server timezone is the default and is the difference between GMT and
    4634  * server time. The 'blog' value is just when the last post was modified. The
    4635  * 'gmt' is when the last post was modified in GMT time.
    4636  *
    4637  * @since 1.2.0
    4638  * @uses apply_filters() Calls 'get_lastpostmodified' filter
    4639  *
    4640  * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
    4641  * @return string The date the post was last modified.
    4642  */
    4643 function get_lastpostmodified($timezone = 'server') {
    4644         $lastpostmodified = _get_last_post_time( $timezone, 'modified' );
    4645 
    4646         $lastpostdate = get_lastpostdate($timezone);
    4647         if ( $lastpostdate > $lastpostmodified )
    4648                 $lastpostmodified = $lastpostdate;
    4649 
    4650         return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
    4651 }
    4652 
    4653 /**
    4654  * Retrieve latest post date data based on timezone.
    4655  *
    4656  * @access private
    4657  * @since 3.1.0
    4658  *
    4659  * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
    4660  * @param string $field Field to check. Can be 'date' or 'modified'.
    4661  * @return string The date.
    4662  */
    4663 function _get_last_post_time( $timezone, $field ) {
    4664         global $wpdb;
    4665 
    4666         if ( !in_array( $field, array( 'date', 'modified' ) ) )
    4667                 return false;
    4668 
    4669         $timezone = strtolower( $timezone );
    4670 
    4671         $key = "lastpost{$field}:$timezone";
    4672 
    4673         $date = wp_cache_get( $key, 'timeinfo' );
    4674 
    4675         if ( !$date ) {
    4676                 $add_seconds_server = date('Z');
    4677 
    4678                 $post_types = get_post_types( array( 'public' => true ) );
    4679                 array_walk( $post_types, array( &$wpdb, 'escape_by_ref' ) );
    4680                 $post_types = "'" . implode( "', '", $post_types ) . "'";
    4681 
    4682                 switch ( $timezone ) {
    4683                         case 'gmt':
    4684                                 $date = $wpdb->get_var("SELECT post_{$field}_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
    4685                                 break;
    4686                         case 'blog':
    4687                                 $date = $wpdb->get_var("SELECT post_{$field} FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
    4688                                 break;
    4689                         case 'server':
    4690                                 $date = $wpdb->get_var("SELECT DATE_ADD(post_{$field}_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
    4691                                 break;
    4692                 }
    4693 
    4694                 if ( $date )
    4695                         wp_cache_set( $key, $date, 'timeinfo' );
    4696         }
    4697 
    4698         return $date;
    4699 }
    4700 
    4701 /**
    4702  * Updates posts in cache.
    4703  *
    4704  * @package WordPress
    4705  * @subpackage Cache
    4706  * @since 1.5.1
    4707  *
    4708  * @param array $posts Array of post objects
    4709  */
    4710 function update_post_cache( &$posts ) {
    4711         if ( ! $posts )
    4712                 return;
    4713 
    4714         foreach ( $posts as $post )
    4715                 wp_cache_add( $post->ID, $post, 'posts' );
    4716 }
    4717 
    4718 /**
    4719  * Will clean the post in the cache.
    4720  *
    4721  * Cleaning means delete from the cache of the post. Will call to clean the term
    4722  * object cache associated with the post ID.
    4723  *
    4724  * This function not run if $_wp_suspend_cache_invalidation is not empty. See
    4725  * wp_suspend_cache_invalidation().
    4726  *
    4727  * @package WordPress
    4728  * @subpackage Cache
    4729  * @since 2.0.0
    4730  *
    4731  * @uses do_action() Calls 'clean_post_cache' on $id before adding children (if any).
    4732  *
    4733  * @param object|int $post The post object or ID to remove from the cache
    4734  */
    4735 function clean_post_cache( $post ) {
    4736         global $_wp_suspend_cache_invalidation, $wpdb;
    4737 
    4738         if ( ! empty( $_wp_suspend_cache_invalidation ) )
    4739                 return;
    4740 
    4741         $post = get_post( $post );
    4742         if ( empty( $post ) )
    4743                 return;
    4744 
    4745         wp_cache_delete( $post->ID, 'posts' );
    4746         wp_cache_delete( $post->ID, 'post_meta' );
    4747 
    4748         clean_object_term_cache( $post->ID, $post->post_type );
    4749 
    4750         wp_cache_delete( 'wp_get_archives', 'general' );
    4751 
    4752         do_action( 'clean_post_cache', $post->ID, $post );
    4753 
    4754         if ( is_post_type_hierarchical( $post->post_type ) )
    4755                 wp_cache_delete( 'get_pages', 'posts' );
    4756 
    4757         if ( 'page' == $post->post_type ) {
    4758                 wp_cache_delete( 'all_page_ids', 'posts' );
    4759                 do_action( 'clean_page_cache', $post->ID );
    4760         }
    4761 
    4762         wp_cache_set( 'last_changed', microtime(), 'posts' );
    4763 }
    4764 
    4765 /**
    4766  * Call major cache updating functions for list of Post objects.
    4767  *
    4768  * @package WordPress
    4769  * @subpackage Cache
    4770  * @since 1.5.0
    4771  *
    4772  * @uses $wpdb
    4773  * @uses update_post_cache()
    4774  * @uses update_object_term_cache()
    4775  * @uses update_postmeta_cache()
    4776  *
    4777  * @param array $posts Array of Post objects
    4778  * @param string $post_type The post type of the posts in $posts. Default is 'post'.
    4779  * @param bool $update_term_cache Whether to update the term cache. Default is true.
    4780  * @param bool $update_meta_cache Whether to update the meta cache. Default is true.
    4781  */
    4782 function update_post_caches(&$posts, $post_type = 'post', $update_term_cache = true, $update_meta_cache = true) {
    4783         // No point in doing all this work if we didn't match any posts.
    4784         if ( !$posts )
    4785                 return;
    4786 
    4787         update_post_cache($posts);
    4788 
    4789         $post_ids = array();
    4790         foreach ( $posts as $post )
    4791                 $post_ids[] = $post->ID;
    4792 
    4793         if ( ! $post_type )
    4794                 $post_type = 'any';
    4795 
    4796         if ( $update_term_cache ) {
    4797                 if ( is_array($post_type) ) {
    4798                         $ptypes = $post_type;
    4799                 } elseif ( 'any' == $post_type ) {
    4800                         // Just use the post_types in the supplied posts.
    4801                         foreach ( $posts as $post )
    4802                                 $ptypes[] = $post->post_type;
    4803                         $ptypes = array_unique($ptypes);
    4804                 } else {
    4805                         $ptypes = array($post_type);
    4806                 }
    4807 
    4808                 if ( ! empty($ptypes) )
    4809                         update_object_term_cache($post_ids, $ptypes);
    4810         }
    4811 
    4812         if ( $update_meta_cache )
    4813                 update_postmeta_cache($post_ids);
    4814 }
    4815 
    4816 /**
    4817  * Updates metadata cache for list of post IDs.
    4818  *
    4819  * Performs SQL query to retrieve the metadata for the post IDs and updates the
    4820  * metadata cache for the posts. Therefore, the functions, which call this
    4821  * function, do not need to perform SQL queries on their own.
    4822  *
    4823  * @package WordPress
    4824  * @subpackage Cache
    4825  * @since 2.1.0
    4826  *
    4827  * @uses $wpdb
    4828  *
    4829  * @param array $post_ids List of post IDs.
    4830  * @return bool|array Returns false if there is nothing to update or an array of metadata.
    4831  */
    4832 function update_postmeta_cache($post_ids) {
    4833         return update_meta_cache('post', $post_ids);
    4834 }
    4835 
    4836 /**
    4837  * Will clean the attachment in the cache.
    4838  *
    4839  * Cleaning means delete from the cache. Optionally will clean the term
    4840  * object cache associated with the attachment ID.
    4841  *
    4842  * This function will not run if $_wp_suspend_cache_invalidation is not empty. See
    4843  * wp_suspend_cache_invalidation().
    4844  *
    4845  * @package WordPress
    4846  * @subpackage Cache
    4847  * @since 3.0.0
    4848  *
    4849  * @uses do_action() Calls 'clean_attachment_cache' on $id.
    4850  *
    4851  * @param int $id The attachment ID in the cache to clean
    4852  * @param bool $clean_terms optional. Whether to clean terms cache
    4853  */
    4854 function clean_attachment_cache($id, $clean_terms = false) {
    4855         global $_wp_suspend_cache_invalidation;
    4856 
    4857         if ( !empty($_wp_suspend_cache_invalidation) )
    4858                 return;
    4859 
    4860         $id = (int) $id;
    4861 
    4862         wp_cache_delete($id, 'posts');
    4863         wp_cache_delete($id, 'post_meta');
    4864 
    4865         if ( $clean_terms )
    4866                 clean_object_term_cache($id, 'attachment');
    4867 
    4868         do_action('clean_attachment_cache', $id);
    4869 }
    4870 
    4871 //
    4872 // Hooks
    4873 //
    4874 
    4875 /**
    4876  * Hook for managing future post transitions to published.
    4877  *
    4878  * @since 2.3.0
    4879  * @access private
    4880  * @uses $wpdb
    4881  * @uses do_action() Calls 'private_to_published' on post ID if this is a 'private_to_published' call.
    4882  * @uses wp_clear_scheduled_hook() with 'publish_future_post' and post ID.
    4883  *
    4884  * @param string $new_status New post status
    4885  * @param string $old_status Previous post status
    4886  * @param object $post Object type containing the post information
    4887  */
    4888 function _transition_post_status($new_status, $old_status, $post) {
    4889         global $wpdb;
    4890 
    4891         if ( $old_status != 'publish' && $new_status == 'publish' ) {
    4892                 // Reset GUID if transitioning to publish and it is empty
    4893                 if ( '' == get_the_guid($post->ID) )
    4894                         $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
    4895                 do_action('private_to_published', $post->ID);  // Deprecated, use private_to_publish
    4896         }
    4897 
    4898         // If published posts changed clear the lastpostmodified cache
    4899         if ( 'publish' == $new_status || 'publish' == $old_status) {
    4900                 foreach ( array( 'server', 'gmt', 'blog' ) as $timezone ) {
    4901                         wp_cache_delete( "lastpostmodified:$timezone", 'timeinfo' );
    4902                         wp_cache_delete( "lastpostdate:$timezone", 'timeinfo' );
    4903                 }
    4904         }
    4905 
    4906         // Always clears the hook in case the post status bounced from future to draft.
    4907         wp_clear_scheduled_hook('publish_future_post', array( $post->ID ) );
    4908 }
    4909 
    4910 /**
    4911  * Hook used to schedule publication for a post marked for the future.
    4912  *
    4913  * The $post properties used and must exist are 'ID' and 'post_date_gmt'.
    4914  *
    4915  * @since 2.3.0
    4916  * @access private
    4917  *
    4918  * @param int $deprecated Not used. Can be set to null. Never implemented.
    4919  *   Not marked as deprecated with _deprecated_argument() as it conflicts with
    4920  *   wp_transition_post_status() and the default filter for _future_post_hook().
    4921  * @param object $post Object type containing the post information
    4922  */
    4923 function _future_post_hook( $deprecated = '', $post ) {
    4924         wp_clear_scheduled_hook( 'publish_future_post', array( $post->ID ) );
    4925         wp_schedule_single_event( strtotime( get_gmt_from_date( $post->post_date ) . ' GMT') , 'publish_future_post', array( $post->ID ) );
    4926 }
    4927 
    4928 /**
    4929  * Hook to schedule pings and enclosures when a post is published.
    4930  *
    4931  * @since 2.3.0
    4932  * @access private
    4933  * @uses XMLRPC_REQUEST and WP_IMPORTING constants.
    4934  * @uses do_action() Calls 'xmlrpc_publish_post' on post ID if XMLRPC_REQUEST is defined.
    4935  *
    4936  * @param int $post_id The ID in the database table of the post being published
    4937  */
    4938 function _publish_post_hook($post_id) {
    4939         if ( defined('XMLRPC_REQUEST') )
    4940                 do_action('xmlrpc_publish_post', $post_id);
    4941 
    4942         if ( defined('WP_IMPORTING') )
    4943                 return;
    4944 
    4945         if ( get_option('default_pingback_flag') )
    4946                 wp_add_post_meta( $post_id, '_pingme', '1' );
    4947         wp_add_post_meta( $post_id, '_encloseme', '1' );
    4948 
    4949         wp_schedule_single_event(time(), 'do_pings');
    4950 }
    4951 
    4952 /**
    4953  * Determines which fields of posts are to be saved in revisions.
    4954  *
    4955  * Does two things. If passed a post *array*, it will return a post array ready
    4956  * to be inserted into the posts table as a post revision. Otherwise, returns
    4957  * an array whose keys are the post fields to be saved for post revisions.
    4958  *
    4959  * @package WordPress
    4960  * @subpackage Post_Revisions
    4961  * @since 2.6.0
    4962  * @access private
    4963  * @uses apply_filters() Calls '_wp_post_revision_fields' on 'title', 'content' and 'excerpt' fields.
    4964  *
    4965  * @param array $post Optional a post array to be processed for insertion as a post revision.
    4966  * @param bool $autosave optional Is the revision an autosave?
    4967  * @return array Post array ready to be inserted as a post revision or array of fields that can be versioned.
    4968  */
    4969 function _wp_post_revision_fields( $post = null, $autosave = false ) {
    4970         static $fields = false;
    4971 
    4972         if ( !$fields ) {
    4973                 // Allow these to be versioned
    4974                 $fields = array(
    4975                         'post_title' => __( 'Title' ),
    4976                         'post_content' => __( 'Content' ),
    4977                         'post_excerpt' => __( 'Excerpt' ),
    4978                 );
    4979 
    4980                 // Runs only once
    4981                 $fields = apply_filters( '_wp_post_revision_fields', $fields );
    4982 
    4983                 // WP uses these internally either in versioning or elsewhere - they cannot be versioned
    4984                 foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect )
    4985                         unset( $fields[$protect] );
    4986         }
    4987 
    4988         if ( !is_array($post) )
    4989                 return $fields;
    4990 
    4991         $return = array();
    4992         foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field )
    4993                 $return[$field] = $post[$field];
    4994 
    4995         $return['post_parent']   = $post['ID'];
    4996         $return['post_status']   = 'inherit';
    4997         $return['post_type']     = 'revision';
    4998         $return['post_name']     = $autosave ? "$post[ID]-autosave" : "$post[ID]-revision";
    4999         $return['post_date']     = isset($post['post_modified']) ? $post['post_modified'] : '';
    5000         $return['post_date_gmt'] = isset($post['post_modified_gmt']) ? $post['post_modified_gmt'] : '';
    5001 
    5002         return $return;
    5003 }
    5004 
    5005 /**
    5006  * Saves an already existing post as a post revision.
    5007  *
    5008  * Typically used immediately prior to post updates.
    5009  *
    5010  * @package WordPress
    5011  * @subpackage Post_Revisions
    5012  * @since 2.6.0
    5013  *
    5014  * @uses _wp_put_post_revision()
    5015  *
    5016  * @param int $post_id The ID of the post to save as a revision.
    5017  * @return mixed Null or 0 if error, new revision ID, if success.
    5018  */
    5019 function wp_save_post_revision( $post_id, $new_data = null ) {
    5020         // We do autosaves manually with wp_create_post_autosave()
    5021         if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
    5022                 return;
    5023 
    5024         // WP_POST_REVISIONS = 0, false
    5025         if ( ! WP_POST_REVISIONS )
    5026                 return;
    5027 
    5028         if ( !$post = get_post( $post_id, ARRAY_A ) )
    5029                 return;
    5030 
    5031         if ( 'auto-draft' == $post['post_status'] )
    5032                 return;
    5033 
    5034         if ( !post_type_supports($post['post_type'], 'revisions') )
    5035                 return;
    5036 
    5037         // if new data is supplied, check that it is different from last saved revision, unless a plugin tells us to always save regardless
    5038         if ( apply_filters( 'wp_save_post_revision_check_for_changes', true, $post, $new_data ) && is_array( $new_data ) ) {
    5039                 $post_has_changed = false;
    5040                 foreach ( array_keys( _wp_post_revision_fields() ) as $field ) {
    5041                         if ( normalize_whitespace( $new_data[ $field ] ) != normalize_whitespace( $post[ $field ] ) ) {
    5042                                 $post_has_changed = true;
    5043                                 break;
    5044                         }
    5045                 }
    5046                 //don't save revision if post unchanged
    5047                 if( ! $post_has_changed )
    5048                         return;
    5049         }
    5050 
    5051         $return = _wp_put_post_revision( $post );
    5052 
    5053         // WP_POST_REVISIONS = true (default), -1
    5054         if ( !is_numeric( WP_POST_REVISIONS ) || WP_POST_REVISIONS < 0 )
    5055                 return $return;
    5056 
    5057         // all revisions and (possibly) one autosave
    5058         $revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) );
    5059 
    5060         // WP_POST_REVISIONS = (int) (# of autosaves to save)
    5061         $delete = count($revisions) - WP_POST_REVISIONS;
    5062 
    5063         if ( $delete < 1 )
    5064                 return $return;
    5065 
    5066         $revisions = array_slice( $revisions, 0, $delete );
    5067 
    5068         for ( $i = 0; isset($revisions[$i]); $i++ ) {
    5069                 if ( false !== strpos( $revisions[$i]->post_name, 'autosave' ) )
    5070                         continue;
    5071                 wp_delete_post_revision( $revisions[$i]->ID );
    5072         }
    5073 
    5074         return $return;
    5075 }
    5076 
    5077 /**
    5078  * Retrieve the autosaved data of the specified post.
    5079  *
    5080  * Returns a post object containing the information that was autosaved for the
    5081  * specified post.
    5082  *
    5083  * @package WordPress
    5084  * @subpackage Post_Revisions
    5085  * @since 2.6.0
    5086  *
    5087  * @param int $post_id The post ID.
    5088  * @return object|bool The autosaved data or false on failure or when no autosave exists.
    5089  */
    5090 function wp_get_post_autosave( $post_id ) {
    5091 
    5092         if ( !$post = get_post( $post_id ) )
    5093                 return false;
    5094 
    5095         $q = array(
    5096                 'name' => "{$post->ID}-autosave",
    5097                 'post_parent' => $post->ID,
    5098                 'post_type' => 'revision',
    5099                 'post_status' => 'inherit'
    5100         );
    5101 
    5102         // Use WP_Query so that the result gets cached
    5103         $autosave_query = new WP_Query;
    5104 
    5105         add_action( 'parse_query', '_wp_get_post_autosave_hack' );
    5106         $autosave = $autosave_query->query( $q );
    5107         remove_action( 'parse_query', '_wp_get_post_autosave_hack' );
    5108 
    5109         if ( $autosave && is_array($autosave) && is_object($autosave[0]) )
    5110                 return $autosave[0];
    5111 
    5112         return false;
    5113 }
    5114 
    5115 /**
    5116  * Internally used to hack WP_Query into submission.
    5117  *
    5118  * @package WordPress
    5119  * @subpackage Post_Revisions
    5120  * @since 2.6.0
    5121  *
    5122  * @param object $query WP_Query object
    5123  */
    5124 function _wp_get_post_autosave_hack( $query ) {
    5125         $query->is_single = false;
    5126 }
    5127 
    5128 /**
    5129  * Determines if the specified post is a revision.
    5130  *
    5131  * @package WordPress
    5132  * @subpackage Post_Revisions
    5133  * @since 2.6.0
    5134  *
    5135  * @param int|object $post Post ID or post object.
    5136  * @return bool|int False if not a revision, ID of revision's parent otherwise.
    5137  */
    5138 function wp_is_post_revision( $post ) {
    5139         if ( !$post = wp_get_post_revision( $post ) )
    5140                 return false;
    5141         return (int) $post->post_parent;
    5142 }
    5143 
    5144 /**
    5145  * Determines if the specified post is an autosave.
    5146  *
    5147  * @package WordPress
    5148  * @subpackage Post_Revisions
    5149  * @since 2.6.0
    5150  *
    5151  * @param int|object $post Post ID or post object.
    5152  * @return bool|int False if not a revision, ID of autosave's parent otherwise
    5153  */
    5154 function wp_is_post_autosave( $post ) {
    5155         if ( !$post = wp_get_post_revision( $post ) )
    5156                 return false;
    5157         if ( "{$post->post_parent}-autosave" !== $post->post_name )
    5158                 return false;
    5159         return (int) $post->post_parent;
    5160 }
    5161 
    5162 /**
    5163  * Inserts post data into the posts table as a post revision.
    5164  *
    5165  * @package WordPress
    5166  * @subpackage Post_Revisions
    5167  * @since 2.6.0
    5168  *
    5169  * @uses wp_insert_post()
    5170  *
    5171  * @param int|object|array $post Post ID, post object OR post array.
    5172  * @param bool $autosave Optional. Is the revision an autosave?
    5173  * @return mixed Null or 0 if error, new revision ID if success.
    5174  */
    5175 function _wp_put_post_revision( $post = null, $autosave = false ) {
    5176         if ( is_object($post) )
    5177                 $post = get_object_vars( $post );
    5178         elseif ( !is_array($post) )
    5179                 $post = get_post($post, ARRAY_A);
    5180         if ( !$post || empty($post['ID']) )
    5181                 return;
    5182 
    5183         if ( isset($post['post_type']) && 'revision' == $post['post_type'] )
    5184                 return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
    5185 
    5186         $post = _wp_post_revision_fields( $post, $autosave );
    5187 
    5188         $revision_id = wp_insert_post( $post );
    5189         if ( is_wp_error($revision_id) )
    5190                 return $revision_id;
    5191 
    5192         if ( $revision_id )
    5193                 do_action( '_wp_put_post_revision', $revision_id );
    5194         return $revision_id;
    5195 }
    5196 
    5197 /**
    5198  * Gets a post revision.
    5199  *
    5200  * @package WordPress
    5201  * @subpackage Post_Revisions
    5202  * @since 2.6.0
    5203  *
    5204  * @uses get_post()
    5205  *
    5206  * @param int|object $post Post ID or post object
    5207  * @param string $output Optional. OBJECT, ARRAY_A, or ARRAY_N.
    5208  * @param string $filter Optional sanitation filter. @see sanitize_post()
    5209  * @return mixed Null if error or post object if success
    5210  */
    5211 function wp_get_post_revision(&$post, $output = OBJECT, $filter = 'raw') {
    5212         $null = null;
    5213         if ( !$revision = get_post( $post, OBJECT, $filter ) )
    5214                 return $revision;
    5215         if ( 'revision' !== $revision->post_type )
    5216                 return $null;
    5217 
    5218         if ( $output == OBJECT ) {
    5219                 return $revision;
    5220         } elseif ( $output == ARRAY_A ) {
    5221                 $_revision = get_object_vars($revision);
    5222                 return $_revision;
    5223         } elseif ( $output == ARRAY_N ) {
    5224                 $_revision = array_values(get_object_vars($revision));
    5225                 return $_revision;
    5226         }
    5227 
    5228         return $revision;
    5229 }
    5230 
    5231 /**
    5232  * Restores a post to the specified revision.
    5233  *
    5234  * Can restore a past revision using all fields of the post revision, or only selected fields.
    5235  *
    5236  * @package WordPress
    5237  * @subpackage Post_Revisions
    5238  * @since 2.6.0
    5239  *
    5240  * @uses wp_get_post_revision()
    5241  * @uses wp_update_post()
    5242  * @uses do_action() Calls 'wp_restore_post_revision' on post ID and revision ID if wp_update_post()
    5243  *  is successful.
    5244  *
    5245  * @param int|object $revision_id Revision ID or revision object.
    5246  * @param array $fields Optional. What fields to restore from. Defaults to all.
    5247  * @return mixed Null if error, false if no fields to restore, (int) post ID if success.
    5248  */
    5249 function wp_restore_post_revision( $revision_id, $fields = null ) {
    5250         if ( !$revision = wp_get_post_revision( $revision_id, ARRAY_A ) )
    5251                 return $revision;
    5252 
    5253         if ( !is_array( $fields ) )
    5254                 $fields = array_keys( _wp_post_revision_fields() );
    5255 
    5256         $update = array();
    5257         foreach( array_intersect( array_keys( $revision ), $fields ) as $field )
    5258                 $update[$field] = $revision[$field];
    5259 
    5260         if ( !$update )
    5261                 return false;
    5262 
    5263         $update['ID'] = $revision['post_parent'];
    5264 
    5265         $post_id = wp_update_post( $update );
    5266         if ( is_wp_error( $post_id ) )
    5267                 return $post_id;
    5268 
    5269         if ( $post_id )
    5270                 do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] );
    5271 
    5272         return $post_id;
    5273 }
    5274 
    5275 /**
    5276  * Deletes a revision.
    5277  *
    5278  * Deletes the row from the posts table corresponding to the specified revision.
    5279  *
    5280  * @package WordPress
    5281  * @subpackage Post_Revisions
    5282  * @since 2.6.0
    5283  *
    5284  * @uses wp_get_post_revision()
    5285  * @uses wp_delete_post()
    5286  *
    5287  * @param int|object $revision_id Revision ID or revision object.
    5288  * @return mixed Null or WP_Error if error, deleted post if success.
    5289  */
    5290 function wp_delete_post_revision( $revision_id ) {
    5291         if ( !$revision = wp_get_post_revision( $revision_id ) )
    5292                 return $revision;
    5293 
    5294         $delete = wp_delete_post( $revision->ID );
    5295         if ( is_wp_error( $delete ) )
    5296                 return $delete;
    5297 
    5298         if ( $delete )
    5299                 do_action( 'wp_delete_post_revision', $revision->ID, $revision );
    5300 
    5301         return $delete;
    5302 }
    5303 
    5304 /**
    5305  * Returns all revisions of specified post.
    5306  *
    5307  * @package WordPress
    5308  * @subpackage Post_Revisions
    5309  * @since 2.6.0
    5310  *
    5311  * @uses get_children()
    5312  *
    5313  * @param int|object $post_id Post ID or post object
    5314  * @return array empty if no revisions
    5315  */
    5316 function wp_get_post_revisions( $post_id = 0, $args = null ) {
    5317         if ( ! WP_POST_REVISIONS )
    5318                 return array();
    5319         if ( ( !$post = get_post( $post_id ) ) || empty( $post->ID ) )
    5320                 return array();
    5321 
    5322         $defaults = array( 'order' => 'DESC', 'orderby' => 'date' );
    5323         $args = wp_parse_args( $args, $defaults );
    5324         $args = array_merge( $args, array( 'post_parent' => $post->ID, 'post_type' => 'revision', 'post_status' => 'inherit' ) );
    5325 
    5326         if ( !$revisions = get_children( $args ) )
    5327                 return array();
    5328         return $revisions;
    5329 }
    5330 
    5331 function _set_preview($post) {
    5332 
    5333         if ( ! is_object($post) )
    5334                 return $post;
    5335 
    5336         $preview = wp_get_post_autosave($post->ID);
    5337 
    5338         if ( ! is_object($preview) )
    5339                 return $post;
    5340 
    5341         $preview = sanitize_post($preview);
    5342 
    5343         $post->post_content = $preview->post_content;
    5344         $post->post_title = $preview->post_title;
    5345         $post->post_excerpt = $preview->post_excerpt;
    5346 
    5347         return $post;
    5348 }
    5349 
    5350 function _show_post_preview() {
    5351 
    5352         if ( isset($_GET['preview_id']) && isset($_GET['preview_nonce']) ) {
    5353                 $id = (int) $_GET['preview_id'];
    5354 
    5355                 if ( false == wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . $id ) )
    5356                         wp_die( __('You do not have permission to preview drafts.') );
    5357 
    5358                 add_filter('the_preview', '_set_preview');
    5359         }
    5360 }
    5361 
    5362 /**
    5363  * Returns the post's parent's post_ID
    5364  *
    5365  * @since 3.1.0
    5366  *
    5367  * @param int $post_id
    5368  *
    5369  * @return int|bool false on error
    5370  */
    5371 function wp_get_post_parent_id( $post_ID ) {
    5372         $post = get_post( $post_ID );
    5373         if ( !$post || is_wp_error( $post ) )
    5374                 return false;
    5375         return (int) $post->post_parent;
    5376 }
    5377 
    5378 /**
    5379  * Checks the given subset of the post hierarchy for hierarchy loops.
    5380  * Prevents loops from forming and breaks those that it finds.
    5381  *
    5382  * Attached to the wp_insert_post_parent filter.
    5383  *
    5384  * @since 3.1.0
    5385  * @uses wp_find_hierarchy_loop()
    5386  *
    5387  * @param int $post_parent ID of the parent for the post we're checking.
    5388  * @param int $post_ID ID of the post we're checking.
    5389  *
    5390  * @return int The new post_parent for the post.
    5391  */
    5392 function wp_check_post_hierarchy_for_loops( $post_parent, $post_ID ) {
    5393         // Nothing fancy here - bail
    5394         if ( !$post_parent )
    5395                 return 0;
    5396 
    5397         // New post can't cause a loop
    5398         if ( empty( $post_ID ) )
    5399                 return $post_parent;
    5400 
    5401         // Can't be its own parent
    5402         if ( $post_parent == $post_ID )
    5403                 return 0;
    5404 
    5405         // Now look for larger loops
    5406 
    5407         if ( !$loop = wp_find_hierarchy_loop( 'wp_get_post_parent_id', $post_ID, $post_parent ) )
    5408                 return $post_parent; // No loop
    5409 
    5410         // Setting $post_parent to the given value causes a loop
    5411         if ( isset( $loop[$post_ID] ) )
    5412                 return 0;
    5413 
    5414         // There's a loop, but it doesn't contain $post_ID. Break the loop.
    5415         foreach ( array_keys( $loop ) as $loop_member )
    5416                 wp_update_post( array( 'ID' => $loop_member, 'post_parent' => 0 ) );
    5417 
    5418         return $post_parent;
    541996}
    542097
     
    5471148
    5472149/**
    5473  * Sets a post thumbnail.
    5474  *
    5475  * @since 3.1.0
    5476  *
    5477  * @param int|object $post Post ID or object where thumbnail should be attached.
    5478  * @param int $thumbnail_id Thumbnail to attach.
    5479  * @return bool True on success, false on failure.
    5480  */
    5481 function set_post_thumbnail( $post, $thumbnail_id ) {
    5482         $post = get_post( $post );
    5483         $thumbnail_id = absint( $thumbnail_id );
    5484         if ( $post && $thumbnail_id && get_post( $thumbnail_id ) ) {
    5485                 if ( $thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'thumbnail' ) )
    5486                         return wp_update_post_meta( $post->ID, '_thumbnail_id', $thumbnail_id );
    5487                 else
    5488                         return delete_post_meta( $post->ID, '_thumbnail_id' );
    5489         }
    5490         return false;
    5491 }
    5492 
    5493 /**
    5494  * Removes a post thumbnail.
    5495  *
    5496  * @since 3.3.0
    5497  *
    5498  * @param int|object $post Post ID or object where thumbnail should be removed from.
    5499  * @return bool True on success, false on failure.
    5500  */
    5501 function delete_post_thumbnail( $post ) {
    5502         $post = get_post( $post );
    5503         if ( $post )
    5504                 return delete_post_meta( $post->ID, '_thumbnail_id' );
    5505         return false;
    5506 }
    5507 
    5508 /**
    5509150 * Returns a link to a post format index.
    5510151 *
     
    5519160                return false;
    5520161        return get_term_link( $term );
    5521 }
    5522 
    5523 /**
    5524  * Deletes auto-drafts for new posts that are > 7 days old
    5525  *
    5526  * @since 3.4.0
    5527  */
    5528 function wp_delete_auto_drafts() {
    5529         global $wpdb;
    5530 
    5531         // Cleanup old auto-drafts more than 7 days old
    5532         $old_posts = $wpdb->get_col( "SELECT ID FROM $wpdb->posts WHERE post_status = 'auto-draft' AND DATE_SUB( NOW(), INTERVAL 7 DAY ) > post_date" );
    5533         foreach ( (array) $old_posts as $delete )
    5534                 wp_delete_post( $delete, true ); // Force delete
    5535162}
    5536163
     
    5628255
    5629256/**
    5630  * Update the custom taxonomies' term counts when a post's status is changed. For example, default posts term counts (for custom taxonomies) don't include private / draft posts.
    5631  *
    5632  * @access private
    5633  * @param string $new_status
    5634  * @param string $old_status
    5635  * @param object $post
    5636  * @since 3.3.0
    5637  */
    5638 function _update_term_count_on_transition_post_status( $new_status, $old_status, $post ) {
    5639         // Update counts for the post's terms.
    5640         foreach ( (array) get_object_taxonomies( $post->post_type ) as $taxonomy ) {
    5641                 $tt_ids = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'tt_ids' ) );
    5642                 wp_update_term_count( $tt_ids, $taxonomy );
    5643         }
    5644 }
    5645 
    5646 /**
    5647  * Adds any posts from the given ids to the cache that do not already exist in cache
    5648  *
    5649  * @since 3.4.0
    5650  *
    5651  * @access private
    5652  *
    5653  * @param array $post_ids ID list
    5654  * @param bool $update_term_cache Whether to update the term cache. Default is true.
    5655  * @param bool $update_meta_cache Whether to update the meta cache. Default is true.
    5656  */
    5657 function _prime_post_caches( $ids, $update_term_cache = true, $update_meta_cache = true ) {
    5658         global $wpdb;
    5659 
    5660         $non_cached_ids = _get_non_cached_ids( $ids, 'posts' );
    5661         if ( !empty( $non_cached_ids ) ) {
    5662                 $fresh_posts = $wpdb->get_results( sprintf( "SELECT $wpdb->posts.* FROM $wpdb->posts WHERE ID IN (%s)", join( ",", $non_cached_ids ) ) );
    5663 
    5664                 update_post_caches( $fresh_posts, 'any', $update_term_cache, $update_meta_cache );
    5665         }
    5666 }
     257 * Return the class for a post format content wrapper
     258 *
     259 * @since 3.6.0
     260 *
     261 * @param string $format
     262 */
     263function get_post_format_content_class( $format ) {
     264        return apply_filters( 'post_format_content_class', 'post-format-content', $format );
     265}
     266
     267/**
     268 * Ouput the class for a post format content wrapper
     269 *
     270 * @since 3.6.0
     271 *
     272 * @param string $format
     273 */
     274function post_format_content_class( $format ) {
     275        echo get_post_format_content_class( $format );
     276}
     277
     278/**
     279 * Provide fallback behavior for Posts that have associated post format
     280 *
     281 * @since 3.6.0
     282 *
     283 * @param string $content
     284 */
     285function post_formats_compat( $content, $id = 0 ) {
     286        $post = empty( $id ) ? get_post() : get_post( $id );
     287        if ( empty( $post ) )
     288                return $content;
     289
     290        $format = get_post_format( $post );
     291        if ( empty( $format ) || in_array( $format, array( 'status', 'aside', 'chat' ) ) )
     292                return $content;
     293
     294        if ( current_theme_supports( 'post-formats', $format ) )
     295                return $content;
     296
     297        $defaults = array(
     298                'position' => 'after',
     299                'tag' => 'div',
     300                'class' => get_post_format_content_class( $format ),
     301                'link_class' => '',
     302                'image_class' => '',
     303                'gallery' => '[gallery]',
     304                'audio' => '',
     305                'video' => ''
     306        );
     307
     308        $args = apply_filters( 'post_format_compat', array() );
     309        $compat = wp_parse_args( $args, $defaults );
     310
     311        $show_content = true;
     312        $format_output = '';
     313        $meta = get_post_format_meta( $post->ID );
     314
     315        switch ( $format ) {
     316                case 'link':
     317                        $compat['tag'] = '';
     318
     319                        if ( ! empty( $meta['url'] ) ) {
     320                                $esc_url = preg_quote( $meta['url'], '#' );
     321                                // Make sure the same URL isn't in the post (modified/extended versions allowed)
     322                                if ( ! preg_match( '#' . $esc_url . '[^/&\?]#', $content ) ) {
     323                                        $format_output .= sprintf(
     324                                                '<a %shref="%s">%s</a>',
     325                                                empty( $compat['link_class'] ) ? '' : sprintf( 'class="%s" ', esc_attr( $compat['link_class'] ) ),
     326                                                esc_url( $meta['url'] ),
     327                                                empty( $post->post_title ) ? esc_url( $meta['url'] ) : apply_filters( 'the_title', $post->post_title )
     328                                        );
     329                                }
     330                        }
     331                        break;
     332
     333                case 'quote':
     334                        if ( ! empty( $meta['quote'] ) && ! stristr( $content, $meta['quote'] ) ) {
     335                                $format_output .= sprintf( '<blockquote>%s</blockquote>', $meta['quote'] );
     336                                if ( ! empty( $meta['quote_source'] ) ) {
     337                                        $format_output .= sprintf(
     338                                                '<cite>%s</cite>',
     339                                                ! empty( $meta['url'] ) ?
     340                                                        sprintf( '<a href="%s">%s</a>', esc_url( $meta['url'] ), $meta['quote_source'] ) :
     341                                                        $meta['quote_source']
     342                                        );
     343                                }
     344                        }
     345                        break;
     346
     347                case 'image':
     348                        if ( ! empty( $meta['image'] ) ) {
     349                                $image = is_numeric( $meta['image'] ) ? wp_get_attachment_url( $meta['image'] ) : $meta['image'];
     350
     351                                if ( ! empty( $image ) && ! stristr( $content, $image ) ) {
     352                                        $image_html = sprintf(
     353                                                '<img %ssrc="%s" alt="" />',
     354                                                empty( $compat['image_class'] ) ? '' : sprintf( 'class="%s" ', esc_attr( $compat['image_class'] ) ),
     355                                                $image
     356                                        );
     357                                        if ( empty( $meta['url'] ) ) {
     358                                                $format_output .= $image_html;
     359                                        } else {
     360                                                $format_output .= sprintf(
     361                                                        '<a href="%s">%s</a>',
     362                                                        esc_url( $meta['url'] ),
     363                                                        $image_html
     364                                                );
     365                                        }
     366                                }
     367                        }
     368                        break;
     369
     370                case 'gallery':
     371                        preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches );
     372                        if ( ! empty( $matches ) && isset( $matches[2] ) ) {
     373                                foreach ( (array) $matches[2] as $match ) {
     374                                        if ( 'gallery' === $match )
     375                                                break 2; // foreach + case
     376                                }
     377                        }
     378
     379                        if ( empty( $meta['gallery'] ) && ! empty( $compat['gallery'] ) ) {
     380                                $format_output .= $compat['gallery'];
     381                        } elseif ( ! empty( $meta['gallery'] ) ) {
     382                                $format_output .= $meta['gallery'];
     383                        }
     384                        break;
     385
     386                case 'video':
     387                case 'audio':
     388                        $shortcode_regex = '/' . get_shortcode_regex() . '/s';
     389                        $matches = preg_match( $shortcode_regex, $content );
     390                        if ( ! $matches || $format !== $matches[2] ) {
     391                                if ( empty( $meta['media'] ) && ! empty( $compat[$format] ) ) {
     392                                        $format_output .= $compat[$format];
     393                                } elseif ( ! empty( $meta['media'] ) ) {
     394                                        // the metadata is a shortcode or an embed code
     395                                        if ( preg_match( $shortcode_regex, $meta['media'] ) || preg_match( '#<[^>]+>#', $meta['media'] ) ) {
     396                                                $format_output .= $meta['media'];
     397                                        } elseif ( ! stristr( $content, $meta['media'] ) ) {
     398                                                // attempt to embed the URL
     399                                                $format_output .= sprintf( '[embed]%s[/embed]', $meta['media'] );
     400                                        }
     401                                }
     402                        }
     403                        break;
     404                default:
     405                        return $content;
     406                        break;
     407        }
     408
     409        if ( empty( $format_output ) )
     410                return $content;
     411
     412        $output = '';
     413
     414        if ( ! empty( $content ) && $show_content && 'before' !== $compat['position'] )
     415                $output .= $content . PHP_EOL . PHP_EOL;
     416
     417        if ( ! empty( $compat['tag'] ) )
     418                $output .= sprintf( '<%s class="%s">', tag_escape( $compat['tag'] ), esc_attr( $compat['class'] ) );
     419
     420        $output .= $format_output;
     421
     422        if ( ! empty( $compat['tag'] ) )
     423                $output .= sprintf( '</%s>', tag_escape( $compat['tag'] ) );
     424
     425        if ( ! empty( $content ) && $show_content && 'before' === $compat['position'] )
     426                $output .= PHP_EOL . PHP_EOL . $content;
     427
     428        return $output;
     429}
  • trunk/wp-includes/post.php

    r23449 r23466  
    752752
    753753        return false;
    754 }
    755 
    756 /**
    757  * Retrieve the format slug for a post
    758  *
    759  * @since 3.1.0
    760  *
    761  * @param int|object $post A post
    762  *
    763  * @return mixed The format if successful. False if no format is set. WP_Error if errors.
    764  */
    765 function get_post_format( $post = null ) {
    766         $post = get_post($post);
    767 
    768         if ( ! post_type_supports( $post->post_type, 'post-formats' ) )
    769                 return false;
    770 
    771         $_format = get_the_terms( $post->ID, 'post_format' );
    772 
    773         if ( empty( $_format ) )
    774                 return false;
    775 
    776         $format = array_shift( $_format );
    777 
    778         return ( str_replace('post-format-', '', $format->slug ) );
    779 }
    780 
    781 /**
    782  * Check if a post has a particular format
    783  *
    784  * @since 3.1.0
    785  * @uses has_term()
    786  *
    787  * @param string $format The format to check for
    788  * @param object|id $post The post to check. If not supplied, defaults to the current post if used in the loop.
    789  * @return bool True if the post has the format, false otherwise.
    790  */
    791 function has_post_format( $format, $post = null ) {
    792         return has_term('post-format-' . sanitize_key($format), 'post_format', $post);
    793 }
    794 
    795 /**
    796  * Assign a format to a post
    797  *
    798  * @since 3.1.0
    799  *
    800  * @param int|object $post The post for which to assign a format
    801  * @param string $format  A format to assign. Use an empty string or array to remove all formats from the post.
    802  * @return mixed WP_Error on error. Array of affected term IDs on success.
    803  */
    804 function set_post_format( $post, $format ) {
    805         $post = get_post($post);
    806 
    807         if ( empty($post) )
    808                 return new WP_Error('invalid_post', __('Invalid post'));
    809 
    810         if ( !empty($format) ) {
    811                 $format = sanitize_key($format);
    812                 if ( 'standard' == $format || !in_array( $format, array_keys( get_post_format_slugs() ) ) )
    813                         $format = '';
    814                 else
    815                         $format = 'post-format-' . $format;
    816         }
    817 
    818         return wp_set_post_terms($post->ID, $format, 'post_format');
    819754}
    820755
     
    19521887
    19531888/**
    1954  * Retrieve post format metadata for a post
    1955  *
    1956  * @since 3.6.0
    1957  *
    1958  * @param int $post_id
    1959  * @return null
    1960  */
    1961 function get_post_format_meta( $post_id = 0 ) {
    1962         $values = array(
    1963                 'quote'        => '',
    1964                 'quote_source' => '',
    1965                 'image'        => '',
    1966                 'url'          => '',
    1967                 'gallery'      => '',
    1968                 'media'        => '',
    1969         );
    1970 
    1971         foreach ( $values as $key => $value )
    1972                 $values[$key] = get_post_meta( $post_id, '_wp_format_' . $key, true );
    1973 
    1974         return $values;
    1975 }
    1976 
    1977 /**
    19781889 * Check if post is sticky.
    19791890 *
     
    49514862
    49524863/**
    4953  * Determines which fields of posts are to be saved in revisions.
    4954  *
    4955  * Does two things. If passed a post *array*, it will return a post array ready
    4956  * to be inserted into the posts table as a post revision. Otherwise, returns
    4957  * an array whose keys are the post fields to be saved for post revisions.
    4958  *
    4959  * @package WordPress
    4960  * @subpackage Post_Revisions
    4961  * @since 2.6.0
    4962  * @access private
    4963  * @uses apply_filters() Calls '_wp_post_revision_fields' on 'title', 'content' and 'excerpt' fields.
    4964  *
    4965  * @param array $post Optional a post array to be processed for insertion as a post revision.
    4966  * @param bool $autosave optional Is the revision an autosave?
    4967  * @return array Post array ready to be inserted as a post revision or array of fields that can be versioned.
    4968  */
    4969 function _wp_post_revision_fields( $post = null, $autosave = false ) {
    4970         static $fields = false;
    4971 
    4972         if ( !$fields ) {
    4973                 // Allow these to be versioned
    4974                 $fields = array(
    4975                         'post_title' => __( 'Title' ),
    4976                         'post_content' => __( 'Content' ),
    4977                         'post_excerpt' => __( 'Excerpt' ),
    4978                 );
    4979 
    4980                 // Runs only once
    4981                 $fields = apply_filters( '_wp_post_revision_fields', $fields );
    4982 
    4983                 // WP uses these internally either in versioning or elsewhere - they cannot be versioned
    4984                 foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect )
    4985                         unset( $fields[$protect] );
    4986         }
    4987 
    4988         if ( !is_array($post) )
    4989                 return $fields;
    4990 
    4991         $return = array();
    4992         foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field )
    4993                 $return[$field] = $post[$field];
    4994 
    4995         $return['post_parent']   = $post['ID'];
    4996         $return['post_status']   = 'inherit';
    4997         $return['post_type']     = 'revision';
    4998         $return['post_name']     = $autosave ? "$post[ID]-autosave" : "$post[ID]-revision";
    4999         $return['post_date']     = isset($post['post_modified']) ? $post['post_modified'] : '';
    5000         $return['post_date_gmt'] = isset($post['post_modified_gmt']) ? $post['post_modified_gmt'] : '';
    5001 
    5002         return $return;
    5003 }
    5004 
    5005 /**
    5006  * Saves an already existing post as a post revision.
    5007  *
    5008  * Typically used immediately prior to post updates.
    5009  *
    5010  * @package WordPress
    5011  * @subpackage Post_Revisions
    5012  * @since 2.6.0
    5013  *
    5014  * @uses _wp_put_post_revision()
    5015  *
    5016  * @param int $post_id The ID of the post to save as a revision.
    5017  * @return mixed Null or 0 if error, new revision ID, if success.
    5018  */
    5019 function wp_save_post_revision( $post_id, $new_data = null ) {
    5020         // We do autosaves manually with wp_create_post_autosave()
    5021         if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
    5022                 return;
    5023 
    5024         // WP_POST_REVISIONS = 0, false
    5025         if ( ! WP_POST_REVISIONS )
    5026                 return;
    5027 
    5028         if ( !$post = get_post( $post_id, ARRAY_A ) )
    5029                 return;
    5030 
    5031         if ( 'auto-draft' == $post['post_status'] )
    5032                 return;
    5033 
    5034         if ( !post_type_supports($post['post_type'], 'revisions') )
    5035                 return;
    5036 
    5037         // if new data is supplied, check that it is different from last saved revision, unless a plugin tells us to always save regardless
    5038         if ( apply_filters( 'wp_save_post_revision_check_for_changes', true, $post, $new_data ) && is_array( $new_data ) ) {
    5039                 $post_has_changed = false;
    5040                 foreach ( array_keys( _wp_post_revision_fields() ) as $field ) {
    5041                         if ( normalize_whitespace( $new_data[ $field ] ) != normalize_whitespace( $post[ $field ] ) ) {
    5042                                 $post_has_changed = true;
    5043                                 break;
    5044                         }
    5045                 }
    5046                 //don't save revision if post unchanged
    5047                 if( ! $post_has_changed )
    5048                         return;
    5049         }
    5050 
    5051         $return = _wp_put_post_revision( $post );
    5052 
    5053         // WP_POST_REVISIONS = true (default), -1
    5054         if ( !is_numeric( WP_POST_REVISIONS ) || WP_POST_REVISIONS < 0 )
    5055                 return $return;
    5056 
    5057         // all revisions and (possibly) one autosave
    5058         $revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) );
    5059 
    5060         // WP_POST_REVISIONS = (int) (# of autosaves to save)
    5061         $delete = count($revisions) - WP_POST_REVISIONS;
    5062 
    5063         if ( $delete < 1 )
    5064                 return $return;
    5065 
    5066         $revisions = array_slice( $revisions, 0, $delete );
    5067 
    5068         for ( $i = 0; isset($revisions[$i]); $i++ ) {
    5069                 if ( false !== strpos( $revisions[$i]->post_name, 'autosave' ) )
    5070                         continue;
    5071                 wp_delete_post_revision( $revisions[$i]->ID );
    5072         }
    5073 
    5074         return $return;
    5075 }
    5076 
    5077 /**
    5078  * Retrieve the autosaved data of the specified post.
    5079  *
    5080  * Returns a post object containing the information that was autosaved for the
    5081  * specified post.
    5082  *
    5083  * @package WordPress
    5084  * @subpackage Post_Revisions
    5085  * @since 2.6.0
    5086  *
    5087  * @param int $post_id The post ID.
    5088  * @return object|bool The autosaved data or false on failure or when no autosave exists.
    5089  */
    5090 function wp_get_post_autosave( $post_id ) {
    5091 
    5092         if ( !$post = get_post( $post_id ) )
    5093                 return false;
    5094 
    5095         $q = array(
    5096                 'name' => "{$post->ID}-autosave",
    5097                 'post_parent' => $post->ID,
    5098                 'post_type' => 'revision',
    5099                 'post_status' => 'inherit'
    5100         );
    5101 
    5102         // Use WP_Query so that the result gets cached
    5103         $autosave_query = new WP_Query;
    5104 
    5105         add_action( 'parse_query', '_wp_get_post_autosave_hack' );
    5106         $autosave = $autosave_query->query( $q );
    5107         remove_action( 'parse_query', '_wp_get_post_autosave_hack' );
    5108 
    5109         if ( $autosave && is_array($autosave) && is_object($autosave[0]) )
    5110                 return $autosave[0];
    5111 
    5112         return false;
    5113 }
    5114 
    5115 /**
    5116  * Internally used to hack WP_Query into submission.
    5117  *
    5118  * @package WordPress
    5119  * @subpackage Post_Revisions
    5120  * @since 2.6.0
    5121  *
    5122  * @param object $query WP_Query object
    5123  */
    5124 function _wp_get_post_autosave_hack( $query ) {
    5125         $query->is_single = false;
    5126 }
    5127 
    5128 /**
    5129  * Determines if the specified post is a revision.
    5130  *
    5131  * @package WordPress
    5132  * @subpackage Post_Revisions
    5133  * @since 2.6.0
    5134  *
    5135  * @param int|object $post Post ID or post object.
    5136  * @return bool|int False if not a revision, ID of revision's parent otherwise.
    5137  */
    5138 function wp_is_post_revision( $post ) {
    5139         if ( !$post = wp_get_post_revision( $post ) )
    5140                 return false;
    5141         return (int) $post->post_parent;
    5142 }
    5143 
    5144 /**
    5145  * Determines if the specified post is an autosave.
    5146  *
    5147  * @package WordPress
    5148  * @subpackage Post_Revisions
    5149  * @since 2.6.0
    5150  *
    5151  * @param int|object $post Post ID or post object.
    5152  * @return bool|int False if not a revision, ID of autosave's parent otherwise
    5153  */
    5154 function wp_is_post_autosave( $post ) {
    5155         if ( !$post = wp_get_post_revision( $post ) )
    5156                 return false;
    5157         if ( "{$post->post_parent}-autosave" !== $post->post_name )
    5158                 return false;
    5159         return (int) $post->post_parent;
    5160 }
    5161 
    5162 /**
    5163  * Inserts post data into the posts table as a post revision.
    5164  *
    5165  * @package WordPress
    5166  * @subpackage Post_Revisions
    5167  * @since 2.6.0
    5168  *
    5169  * @uses wp_insert_post()
    5170  *
    5171  * @param int|object|array $post Post ID, post object OR post array.
    5172  * @param bool $autosave Optional. Is the revision an autosave?
    5173  * @return mixed Null or 0 if error, new revision ID if success.
    5174  */
    5175 function _wp_put_post_revision( $post = null, $autosave = false ) {
    5176         if ( is_object($post) )
    5177                 $post = get_object_vars( $post );
    5178         elseif ( !is_array($post) )
    5179                 $post = get_post($post, ARRAY_A);
    5180         if ( !$post || empty($post['ID']) )
    5181                 return;
    5182 
    5183         if ( isset($post['post_type']) && 'revision' == $post['post_type'] )
    5184                 return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
    5185 
    5186         $post = _wp_post_revision_fields( $post, $autosave );
    5187 
    5188         $revision_id = wp_insert_post( $post );
    5189         if ( is_wp_error($revision_id) )
    5190                 return $revision_id;
    5191 
    5192         if ( $revision_id )
    5193                 do_action( '_wp_put_post_revision', $revision_id );
    5194         return $revision_id;
    5195 }
    5196 
    5197 /**
    5198  * Gets a post revision.
    5199  *
    5200  * @package WordPress
    5201  * @subpackage Post_Revisions
    5202  * @since 2.6.0
    5203  *
    5204  * @uses get_post()
    5205  *
    5206  * @param int|object $post Post ID or post object
    5207  * @param string $output Optional. OBJECT, ARRAY_A, or ARRAY_N.
    5208  * @param string $filter Optional sanitation filter. @see sanitize_post()
    5209  * @return mixed Null if error or post object if success
    5210  */
    5211 function wp_get_post_revision(&$post, $output = OBJECT, $filter = 'raw') {
    5212         $null = null;
    5213         if ( !$revision = get_post( $post, OBJECT, $filter ) )
    5214                 return $revision;
    5215         if ( 'revision' !== $revision->post_type )
    5216                 return $null;
    5217 
    5218         if ( $output == OBJECT ) {
    5219                 return $revision;
    5220         } elseif ( $output == ARRAY_A ) {
    5221                 $_revision = get_object_vars($revision);
    5222                 return $_revision;
    5223         } elseif ( $output == ARRAY_N ) {
    5224                 $_revision = array_values(get_object_vars($revision));
    5225                 return $_revision;
    5226         }
    5227 
    5228         return $revision;
    5229 }
    5230 
    5231 /**
    5232  * Restores a post to the specified revision.
    5233  *
    5234  * Can restore a past revision using all fields of the post revision, or only selected fields.
    5235  *
    5236  * @package WordPress
    5237  * @subpackage Post_Revisions
    5238  * @since 2.6.0
    5239  *
    5240  * @uses wp_get_post_revision()
    5241  * @uses wp_update_post()
    5242  * @uses do_action() Calls 'wp_restore_post_revision' on post ID and revision ID if wp_update_post()
    5243  *  is successful.
    5244  *
    5245  * @param int|object $revision_id Revision ID or revision object.
    5246  * @param array $fields Optional. What fields to restore from. Defaults to all.
    5247  * @return mixed Null if error, false if no fields to restore, (int) post ID if success.
    5248  */
    5249 function wp_restore_post_revision( $revision_id, $fields = null ) {
    5250         if ( !$revision = wp_get_post_revision( $revision_id, ARRAY_A ) )
    5251                 return $revision;
    5252 
    5253         if ( !is_array( $fields ) )
    5254                 $fields = array_keys( _wp_post_revision_fields() );
    5255 
    5256         $update = array();
    5257         foreach( array_intersect( array_keys( $revision ), $fields ) as $field )
    5258                 $update[$field] = $revision[$field];
    5259 
    5260         if ( !$update )
    5261                 return false;
    5262 
    5263         $update['ID'] = $revision['post_parent'];
    5264 
    5265         $post_id = wp_update_post( $update );
    5266         if ( is_wp_error( $post_id ) )
    5267                 return $post_id;
    5268 
    5269         if ( $post_id )
    5270                 do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] );
    5271 
    5272         return $post_id;
    5273 }
    5274 
    5275 /**
    5276  * Deletes a revision.
    5277  *
    5278  * Deletes the row from the posts table corresponding to the specified revision.
    5279  *
    5280  * @package WordPress
    5281  * @subpackage Post_Revisions
    5282  * @since 2.6.0
    5283  *
    5284  * @uses wp_get_post_revision()
    5285  * @uses wp_delete_post()
    5286  *
    5287  * @param int|object $revision_id Revision ID or revision object.
    5288  * @return mixed Null or WP_Error if error, deleted post if success.
    5289  */
    5290 function wp_delete_post_revision( $revision_id ) {
    5291         if ( !$revision = wp_get_post_revision( $revision_id ) )
    5292                 return $revision;
    5293 
    5294         $delete = wp_delete_post( $revision->ID );
    5295         if ( is_wp_error( $delete ) )
    5296                 return $delete;
    5297 
    5298         if ( $delete )
    5299                 do_action( 'wp_delete_post_revision', $revision->ID, $revision );
    5300 
    5301         return $delete;
    5302 }
    5303 
    5304 /**
    5305  * Returns all revisions of specified post.
    5306  *
    5307  * @package WordPress
    5308  * @subpackage Post_Revisions
    5309  * @since 2.6.0
    5310  *
    5311  * @uses get_children()
    5312  *
    5313  * @param int|object $post_id Post ID or post object
    5314  * @return array empty if no revisions
    5315  */
    5316 function wp_get_post_revisions( $post_id = 0, $args = null ) {
    5317         if ( ! WP_POST_REVISIONS )
    5318                 return array();
    5319         if ( ( !$post = get_post( $post_id ) ) || empty( $post->ID ) )
    5320                 return array();
    5321 
    5322         $defaults = array( 'order' => 'DESC', 'orderby' => 'date' );
    5323         $args = wp_parse_args( $args, $defaults );
    5324         $args = array_merge( $args, array( 'post_parent' => $post->ID, 'post_type' => 'revision', 'post_status' => 'inherit' ) );
    5325 
    5326         if ( !$revisions = get_children( $args ) )
    5327                 return array();
    5328         return $revisions;
    5329 }
    5330 
    5331 function _set_preview($post) {
    5332 
    5333         if ( ! is_object($post) )
    5334                 return $post;
    5335 
    5336         $preview = wp_get_post_autosave($post->ID);
    5337 
    5338         if ( ! is_object($preview) )
    5339                 return $post;
    5340 
    5341         $preview = sanitize_post($preview);
    5342 
    5343         $post->post_content = $preview->post_content;
    5344         $post->post_title = $preview->post_title;
    5345         $post->post_excerpt = $preview->post_excerpt;
    5346 
    5347         return $post;
    5348 }
    5349 
    5350 function _show_post_preview() {
    5351 
    5352         if ( isset($_GET['preview_id']) && isset($_GET['preview_nonce']) ) {
    5353                 $id = (int) $_GET['preview_id'];
    5354 
    5355                 if ( false == wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . $id ) )
    5356                         wp_die( __('You do not have permission to preview drafts.') );
    5357 
    5358                 add_filter('the_preview', '_set_preview');
    5359         }
    5360 }
    5361 
    5362 /**
    53634864 * Returns the post's parent's post_ID
    53644865 *
     
    54174918
    54184919        return $post_parent;
    5419 }
    5420 
    5421 /**
    5422  * Returns an array of post format slugs to their translated and pretty display versions
    5423  *
    5424  * @since 3.1.0
    5425  *
    5426  * @return array The array of translations
    5427  */
    5428 function get_post_format_strings() {
    5429         $strings = array(
    5430                 'standard' => _x( 'Standard', 'Post format' ), // Special case. any value that evals to false will be considered standard
    5431                 'aside'    => _x( 'Aside',    'Post format' ),
    5432                 'chat'     => _x( 'Chat',     'Post format' ),
    5433                 'gallery'  => _x( 'Gallery',  'Post format' ),
    5434                 'link'     => _x( 'Link',     'Post format' ),
    5435                 'image'    => _x( 'Image',    'Post format' ),
    5436                 'quote'    => _x( 'Quote',    'Post format' ),
    5437                 'status'   => _x( 'Status',   'Post format' ),
    5438                 'video'    => _x( 'Video',    'Post format' ),
    5439                 'audio'    => _x( 'Audio',    'Post format' ),
    5440         );
    5441         return $strings;
    5442 }
    5443 
    5444 /**
    5445  * Retrieves an array of post format slugs.
    5446  *
    5447  * @since 3.1.0
    5448  *
    5449  * @return array The array of post format slugs.
    5450  */
    5451 function get_post_format_slugs() {
    5452         $slugs = array_keys( get_post_format_strings() );
    5453         return array_combine( $slugs, $slugs );
    5454 }
    5455 
    5456 /**
    5457  * Returns a pretty, translated version of a post format slug
    5458  *
    5459  * @since 3.1.0
    5460  *
    5461  * @param string $slug A post format slug
    5462  * @return string The translated post format name
    5463  */
    5464 function get_post_format_string( $slug ) {
    5465         $strings = get_post_format_strings();
    5466         if ( !$slug )
    5467                 return $strings['standard'];
    5468         else
    5469                 return ( isset( $strings[$slug] ) ) ? $strings[$slug] : '';
    54704920}
    54714921
     
    55074957
    55084958/**
    5509  * Returns a link to a post format index.
    5510  *
    5511  * @since 3.1.0
    5512  *
    5513  * @param string $format Post format
    5514  * @return string Link
    5515  */
    5516 function get_post_format_link( $format ) {
    5517         $term = get_term_by('slug', 'post-format-' . $format, 'post_format' );
    5518         if ( ! $term || is_wp_error( $term ) )
    5519                 return false;
    5520         return get_term_link( $term );
    5521 }
    5522 
    5523 /**
    55244959 * Deletes auto-drafts for new posts that are > 7 days old
    55254960 *
     
    55344969                wp_delete_post( $delete, true ); // Force delete
    55354970}
    5536 
    5537 /**
    5538  * Filters the request to allow for the format prefix.
    5539  *
    5540  * @access private
    5541  * @since 3.1.0
    5542  */
    5543 function _post_format_request( $qvs ) {
    5544         if ( ! isset( $qvs['post_format'] ) )
    5545                 return $qvs;
    5546         $slugs = get_post_format_slugs();
    5547         if ( isset( $slugs[ $qvs['post_format'] ] ) )
    5548                 $qvs['post_format'] = 'post-format-' . $slugs[ $qvs['post_format'] ];
    5549         $tax = get_taxonomy( 'post_format' );
    5550         if ( ! is_admin() )
    5551                 $qvs['post_type'] = $tax->object_type;
    5552         return $qvs;
    5553 }
    5554 add_filter( 'request', '_post_format_request' );
    5555 
    5556 /**
    5557  * Filters the post format term link to remove the format prefix.
    5558  *
    5559  * @access private
    5560  * @since 3.1.0
    5561  */
    5562 function _post_format_link( $link, $term, $taxonomy ) {
    5563         global $wp_rewrite;
    5564         if ( 'post_format' != $taxonomy )
    5565                 return $link;
    5566         if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) {
    5567                 return str_replace( "/{$term->slug}", '/' . str_replace( 'post-format-', '', $term->slug ), $link );
    5568         } else {
    5569                 $link = remove_query_arg( 'post_format', $link );
    5570                 return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link );
    5571         }
    5572 }
    5573 add_filter( 'term_link', '_post_format_link', 10, 3 );
    5574 
    5575 /**
    5576  * Remove the post format prefix from the name property of the term object created by get_term().
    5577  *
    5578  * @access private
    5579  * @since 3.1.0
    5580  */
    5581 function _post_format_get_term( $term ) {
    5582         if ( isset( $term->slug ) ) {
    5583                 $term->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
    5584         }
    5585         return $term;
    5586 }
    5587 add_filter( 'get_post_format', '_post_format_get_term' );
    5588 
    5589 /**
    5590  * Remove the post format prefix from the name property of the term objects created by get_terms().
    5591  *
    5592  * @access private
    5593  * @since 3.1.0
    5594  */
    5595 function _post_format_get_terms( $terms, $taxonomies, $args ) {
    5596         if ( in_array( 'post_format', (array) $taxonomies ) ) {
    5597                 if ( isset( $args['fields'] ) && 'names' == $args['fields'] ) {
    5598                         foreach( $terms as $order => $name ) {
    5599                                 $terms[$order] = get_post_format_string( str_replace( 'post-format-', '', $name ) );
    5600                         }
    5601                 } else {
    5602                         foreach ( (array) $terms as $order => $term ) {
    5603                                 if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
    5604                                         $terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
    5605                                 }
    5606                         }
    5607                 }
    5608         }
    5609         return $terms;
    5610 }
    5611 add_filter( 'get_terms', '_post_format_get_terms', 10, 3 );
    5612 
    5613 /**
    5614  * Remove the post format prefix from the name property of the term objects created by wp_get_object_terms().
    5615  *
    5616  * @access private
    5617  * @since 3.1.0
    5618  */
    5619 function _post_format_wp_get_object_terms( $terms ) {
    5620         foreach ( (array) $terms as $order => $term ) {
    5621                 if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
    5622                         $terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
    5623                 }
    5624         }
    5625         return $terms;
    5626 }
    5627 add_filter( 'wp_get_object_terms', '_post_format_wp_get_object_terms' );
    56284971
    56294972/**
  • trunk/wp-includes/revision.php

    r23465 r23466  
    11<?php
    22/**
    3  * Post functions and post utility function.
    4  *
    5  * @package WordPress
    6  * @subpackage Post
    7  * @since 1.5.0
    8  */
    9 
    10 //
    11 // Post Type Registration
    12 //
    13 
    14 /**
    15  * Creates the initial post types when 'init' action is fired.
    16  *
    17  * @since 2.9.0
    18  */
    19 function create_initial_post_types() {
    20         register_post_type( 'post', array(
    21                 'labels' => array(
    22                         'name_admin_bar' => _x( 'Post', 'add new on admin bar' ),
    23                 ),
    24                 'public'  => true,
    25                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    26                 '_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
    27                 'capability_type' => 'post',
    28                 'map_meta_cap' => true,
    29                 'hierarchical' => false,
    30                 'rewrite' => false,
    31                 'query_var' => false,
    32                 'delete_with_user' => true,
    33                 'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'post-formats' ),
    34         ) );
    35 
    36         register_post_type( 'page', array(
    37                 'labels' => array(
    38                         'name_admin_bar' => _x( 'Page', 'add new on admin bar' ),
    39                 ),
    40                 'public' => true,
    41                 'publicly_queryable' => false,
    42                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    43                 '_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
    44                 'capability_type' => 'page',
    45                 'map_meta_cap' => true,
    46                 'hierarchical' => true,
    47                 'rewrite' => false,
    48                 'query_var' => false,
    49                 'delete_with_user' => true,
    50                 'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'page-attributes', 'custom-fields', 'comments', 'revisions' ),
    51         ) );
    52 
    53         register_post_type( 'attachment', array(
    54                 'labels' => array(
    55                         'name' => _x('Media', 'post type general name'),
    56                         'name_admin_bar' => _x( 'Media', 'add new from admin bar' ),
    57                         'add_new' => _x( 'Add New', 'add new media' ),
    58                         'edit_item' => __( 'Edit Media' ),
    59                         'view_item' => __( 'View Attachment Page' ),
    60                 ),
    61                 'public' => true,
    62                 'show_ui' => true,
    63                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    64                 '_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
    65                 'capability_type' => 'post',
    66                 'capabilities' => array(
    67                         'create_posts' => 'upload_files',
    68                 ),
    69                 'map_meta_cap' => true,
    70                 'hierarchical' => false,
    71                 'rewrite' => false,
    72                 'query_var' => false,
    73                 'show_in_nav_menus' => false,
    74                 'delete_with_user' => true,
    75                 'supports' => array( 'title', 'author', 'comments' ),
    76         ) );
    77 
    78         register_post_type( 'revision', array(
    79                 'labels' => array(
    80                         'name' => __( 'Revisions' ),
    81                         'singular_name' => __( 'Revision' ),
    82                 ),
    83                 'public' => false,
    84                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    85                 '_edit_link' => 'revision.php?revision=%d', /* internal use only. don't use this when registering your own post type. */
    86                 'capability_type' => 'post',
    87                 'map_meta_cap' => true,
    88                 'hierarchical' => false,
    89                 'rewrite' => false,
    90                 'query_var' => false,
    91                 'can_export' => false,
    92                 'delete_with_user' => true,
    93                 'supports' => array( 'author' ),
    94         ) );
    95 
    96         register_post_type( 'nav_menu_item', array(
    97                 'labels' => array(
    98                         'name' => __( 'Navigation Menu Items' ),
    99                         'singular_name' => __( 'Navigation Menu Item' ),
    100                 ),
    101                 'public' => false,
    102                 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
    103                 'hierarchical' => false,
    104                 'rewrite' => false,
    105                 'delete_with_user' => false,
    106                 'query_var' => false,
    107         ) );
    108 
    109         register_post_status( 'publish', array(
    110                 'label'       => _x( 'Published', 'post' ),
    111                 'public'      => true,
    112                 '_builtin'    => true, /* internal use only. */
    113                 'label_count' => _n_noop( 'Published <span class="count">(%s)</span>', 'Published <span class="count">(%s)</span>' ),
    114         ) );
    115 
    116         register_post_status( 'future', array(
    117                 'label'       => _x( 'Scheduled', 'post' ),
    118                 'protected'   => true,
    119                 '_builtin'    => true, /* internal use only. */
    120                 'label_count' => _n_noop('Scheduled <span class="count">(%s)</span>', 'Scheduled <span class="count">(%s)</span>' ),
    121         ) );
    122 
    123         register_post_status( 'draft', array(
    124                 'label'       => _x( 'Draft', 'post' ),
    125                 'protected'   => true,
    126                 '_builtin'    => true, /* internal use only. */
    127                 'label_count' => _n_noop( 'Draft <span class="count">(%s)</span>', 'Drafts <span class="count">(%s)</span>' ),
    128         ) );
    129 
    130         register_post_status( 'pending', array(
    131                 'label'       => _x( 'Pending', 'post' ),
    132                 'protected'   => true,
    133                 '_builtin'    => true, /* internal use only. */
    134                 'label_count' => _n_noop( 'Pending <span class="count">(%s)</span>', 'Pending <span class="count">(%s)</span>' ),
    135         ) );
    136 
    137         register_post_status( 'private', array(
    138                 'label'       => _x( 'Private', 'post' ),
    139                 'private'     => true,
    140                 '_builtin'    => true, /* internal use only. */
    141                 'label_count' => _n_noop( 'Private <span class="count">(%s)</span>', 'Private <span class="count">(%s)</span>' ),
    142         ) );
    143 
    144         register_post_status( 'trash', array(
    145                 'label'       => _x( 'Trash', 'post' ),
    146                 'internal'    => true,
    147                 '_builtin'    => true, /* internal use only. */
    148                 'label_count' => _n_noop( 'Trash <span class="count">(%s)</span>', 'Trash <span class="count">(%s)</span>' ),
    149                 'show_in_admin_status_list' => true,
    150         ) );
    151 
    152         register_post_status( 'auto-draft', array(
    153                 'label'    => 'auto-draft',
    154                 'internal' => true,
    155                 '_builtin' => true, /* internal use only. */
    156         ) );
    157 
    158         register_post_status( 'inherit', array(
    159                 'label'    => 'inherit',
    160                 'internal' => true,
    161                 '_builtin' => true, /* internal use only. */
    162                 'exclude_from_search' => false,
    163         ) );
    164 }
    165 add_action( 'init', 'create_initial_post_types', 0 ); // highest priority
    166 
    167 /**
    168  * Retrieve attached file path based on attachment ID.
    169  *
    170  * You can optionally send it through the 'get_attached_file' filter, but by
    171  * default it will just return the file path unfiltered.
    172  *
    173  * The function works by getting the single post meta name, named
    174  * '_wp_attached_file' and returning it. This is a convenience function to
    175  * prevent looking up the meta name and provide a mechanism for sending the
    176  * attached filename through a filter.
    177  *
    178  * @since 2.0.0
    179  * @uses apply_filters() Calls 'get_attached_file' on file path and attachment ID.
    180  *
    181  * @param int $attachment_id Attachment ID.
    182  * @param bool $unfiltered Whether to apply filters.
    183  * @return string|bool The file path to the attached file, or false if the attachment does not exist.
    184  */
    185 function get_attached_file( $attachment_id, $unfiltered = false ) {
    186         $file = get_post_meta( $attachment_id, '_wp_attached_file', true );
    187         // If the file is relative, prepend upload dir
    188         if ( $file && 0 !== strpos($file, '/') && !preg_match('|^.:\\\|', $file) && ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) )
    189                 $file = $uploads['basedir'] . "/$file";
    190         if ( $unfiltered )
    191                 return $file;
    192         return apply_filters( 'get_attached_file', $file, $attachment_id );
    193 }
    194 
    195 /**
    196  * Update attachment file path based on attachment ID.
    197  *
    198  * Used to update the file path of the attachment, which uses post meta name
    199  * '_wp_attached_file' to store the path of the attachment.
    200  *
    201  * @since 2.1.0
    202  * @uses apply_filters() Calls 'update_attached_file' on file path and attachment ID.
    203  *
    204  * @param int $attachment_id Attachment ID
    205  * @param string $file File path for the attachment
    206  * @return bool False on failure, true on success.
    207  */
    208 function update_attached_file( $attachment_id, $file ) {
    209         if ( !get_post( $attachment_id ) )
    210                 return false;
    211 
    212         $file = apply_filters( 'update_attached_file', $file, $attachment_id );
    213         if ( $file = _wp_relative_upload_path( $file ) )
    214                 return update_post_meta( $attachment_id, '_wp_attached_file', $file );
    215         else
    216                 return delete_post_meta( $attachment_id, '_wp_attached_file' );
    217 }
    218 
    219 /**
    220  * Return relative path to an uploaded file.
    221  *
    222  * The path is relative to the current upload dir.
    223  *
    224  * @since 2.9.0
    225  * @uses apply_filters() Calls '_wp_relative_upload_path' on file path.
    226  *
    227  * @param string $path Full path to the file
    228  * @return string relative path on success, unchanged path on failure.
    229  */
    230 function _wp_relative_upload_path( $path ) {
    231         $new_path = $path;
    232 
    233         $uploads = wp_upload_dir();
    234         if ( 0 === strpos( $new_path, $uploads['basedir'] ) ) {
    235                         $new_path = str_replace( $uploads['basedir'], '', $new_path );
    236                         $new_path = ltrim( $new_path, '/' );
    237         }
    238 
    239         return apply_filters( '_wp_relative_upload_path', $new_path, $path );
    240 }
    241 
    242 /**
    243  * Retrieve all children of the post parent ID.
    244  *
    245  * Normally, without any enhancements, the children would apply to pages. In the
    246  * context of the inner workings of WordPress, pages, posts, and attachments
    247  * share the same table, so therefore the functionality could apply to any one
    248  * of them. It is then noted that while this function does not work on posts, it
    249  * does not mean that it won't work on posts. It is recommended that you know
    250  * what context you wish to retrieve the children of.
    251  *
    252  * Attachments may also be made the child of a post, so if that is an accurate
    253  * statement (which needs to be verified), it would then be possible to get
    254  * all of the attachments for a post. Attachments have since changed since
    255  * version 2.5, so this is most likely unaccurate, but serves generally as an
    256  * example of what is possible.
    257  *
    258  * The arguments listed as defaults are for this function and also of the
    259  * {@link get_posts()} function. The arguments are combined with the
    260  * get_children defaults and are then passed to the {@link get_posts()}
    261  * function, which accepts additional arguments. You can replace the defaults in
    262  * this function, listed below and the additional arguments listed in the
    263  * {@link get_posts()} function.
    264  *
    265  * The 'post_parent' is the most important argument and important attention
    266  * needs to be paid to the $args parameter. If you pass either an object or an
    267  * integer (number), then just the 'post_parent' is grabbed and everything else
    268  * is lost. If you don't specify any arguments, then it is assumed that you are
    269  * in The Loop and the post parent will be grabbed for from the current post.
    270  *
    271  * The 'post_parent' argument is the ID to get the children. The 'numberposts'
    272  * is the amount of posts to retrieve that has a default of '-1', which is
    273  * used to get all of the posts. Giving a number higher than 0 will only
    274  * retrieve that amount of posts.
    275  *
    276  * The 'post_type' and 'post_status' arguments can be used to choose what
    277  * criteria of posts to retrieve. The 'post_type' can be anything, but WordPress
    278  * post types are 'post', 'pages', and 'attachments'. The 'post_status'
    279  * argument will accept any post status within the write administration panels.
    280  *
    281  * @see get_posts() Has additional arguments that can be replaced.
    282  * @internal Claims made in the long description might be inaccurate.
    283  *
    284  * @since 2.0.0
    285  *
    286  * @param mixed $args Optional. User defined arguments for replacing the defaults.
    287  * @param string $output Optional. Constant for return type, either OBJECT (default), ARRAY_A, ARRAY_N.
    288  * @return array|bool False on failure and the type will be determined by $output parameter.
    289  */
    290 function get_children($args = '', $output = OBJECT) {
    291         $kids = array();
    292         if ( empty( $args ) ) {
    293                 if ( isset( $GLOBALS['post'] ) ) {
    294                         $args = array('post_parent' => (int) $GLOBALS['post']->post_parent );
    295                 } else {
    296                         return $kids;
    297                 }
    298         } elseif ( is_object( $args ) ) {
    299                 $args = array('post_parent' => (int) $args->post_parent );
    300         } elseif ( is_numeric( $args ) ) {
    301                 $args = array('post_parent' => (int) $args);
    302         }
    303 
    304         $defaults = array(
    305                 'numberposts' => -1, 'post_type' => 'any',
    306                 'post_status' => 'any', 'post_parent' => 0,
    307         );
    308 
    309         $r = wp_parse_args( $args, $defaults );
    310 
    311         $children = get_posts( $r );
    312 
    313         if ( !$children )
    314                 return $kids;
    315 
    316         update_post_cache($children);
    317 
    318         foreach ( $children as $key => $child )
    319                 $kids[$child->ID] = $children[$key];
    320 
    321         if ( $output == OBJECT ) {
    322                 return $kids;
    323         } elseif ( $output == ARRAY_A ) {
    324                 foreach ( (array) $kids as $kid )
    325                         $weeuns[$kid->ID] = get_object_vars($kids[$kid->ID]);
    326                 return $weeuns;
    327         } elseif ( $output == ARRAY_N ) {
    328                 foreach ( (array) $kids as $kid )
    329                         $babes[$kid->ID] = array_values(get_object_vars($kids[$kid->ID]));
    330                 return $babes;
    331         } else {
    332                 return $kids;
    333         }
    334 }
    335 
    336 /**
    337  * Get extended entry info (<!--more-->).
    338  *
    339  * There should not be any space after the second dash and before the word
    340  * 'more'. There can be text or space(s) after the word 'more', but won't be
    341  * referenced.
    342  *
    343  * The returned array has 'main', 'extended', and 'more_text' keys. Main has the text before
    344  * the <code><!--more--></code>. The 'extended' key has the content after the
    345  * <code><!--more--></code> comment. The 'more_text' key has the custom "Read More" text.
    346  *
    347  * @since 1.0.0
    348  *
    349  * @param string $post Post content.
    350  * @return array Post before ('main'), after ('extended'), and custom readmore ('more_text').
    351  */
    352 function get_extended($post) {
    353         //Match the new style more links
    354         if ( preg_match('/<!--more(.*?)?-->/', $post, $matches) ) {
    355                 list($main, $extended) = explode($matches[0], $post, 2);
    356                 $more_text = $matches[1];
    357         } else {
    358                 $main = $post;
    359                 $extended = '';
    360                 $more_text = '';
    361         }
    362 
    363         // Strip leading and trailing whitespace
    364         $main = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $main);
    365         $extended = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $extended);
    366         $more_text = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $more_text);
    367 
    368         return array( 'main' => $main, 'extended' => $extended, 'more_text' => $more_text );
    369 }
    370 
    371 /**
    372  * Retrieves post data given a post ID or post object.
    373  *
    374  * See {@link sanitize_post()} for optional $filter values. Also, the parameter
    375  * $post, must be given as a variable, since it is passed by reference.
    376  *
    377  * @since 1.5.1
    378  * @uses $wpdb
    379  * @link http://codex.wordpress.org/Function_Reference/get_post
    380  *
    381  * @param int|object $post Post ID or post object. Optional, default is the current post from the loop.
    382  * @param string $output Optional, default is Object. Either OBJECT, ARRAY_A, or ARRAY_N.
    383  * @param string $filter Optional, default is raw.
    384  * @return WP_Post|null WP_Post on success or null on failure
    385  */
    386 function get_post( $post = null, $output = OBJECT, $filter = 'raw' ) {
    387         if ( empty( $post ) && isset( $GLOBALS['post'] ) )
    388                 $post = $GLOBALS['post'];
    389 
    390         if ( is_a( $post, 'WP_Post' ) ) {
    391                 $_post = $post;
    392         } elseif ( is_object( $post ) ) {
    393                 if ( empty( $post->filter ) ) {
    394                         $_post = sanitize_post( $post, 'raw' );
    395                         $_post = new WP_Post( $_post );
    396                 } elseif ( 'raw' == $post->filter ) {
    397                         $_post = new WP_Post( $post );
    398                 } else {
    399                         $_post = WP_Post::get_instance( $post->ID );
    400                 }
    401         } else {
    402                 $_post = WP_Post::get_instance( $post );
    403         }
    404 
    405         if ( ! $_post )
    406                 return null;
    407 
    408         $_post = $_post->filter( $filter );
    409 
    410         if ( $output == ARRAY_A )
    411                 return $_post->to_array();
    412         elseif ( $output == ARRAY_N )
    413                 return array_values( $_post->to_array() );
    414 
    415         return $_post;
    416 }
    417 
    418 /**
    419  * WordPress Post class.
    420  *
    421  * @since 3.5.0
    422  *
    423  */
    424 final class WP_Post {
    425 
    426         /**
    427          *
    428          * @var int
    429          */
    430         public $ID;
    431 
    432         /**
    433          *
    434          * @var int
    435          */
    436         public $post_author = 0;
    437 
    438         /**
    439          *
    440          * @var string
    441          */
    442         public $post_date = '0000-00-00 00:00:00';
    443 
    444         /**
    445          *
    446          * @var string
    447          */
    448         public $post_date_gmt = '0000-00-00 00:00:00';
    449 
    450         /**
    451          *
    452          * @var string
    453          */
    454         public $post_content = '';
    455 
    456         /**
    457          *
    458          * @var string
    459          */
    460         public $post_title = '';
    461 
    462         /**
    463          *
    464          * @var string
    465          */
    466         public $post_excerpt = '';
    467 
    468         /**
    469          *
    470          * @var string
    471          */
    472         public $post_status = 'publish';
    473 
    474         /**
    475          *
    476          * @var string
    477          */
    478         public $comment_status = 'open';
    479 
    480         /**
    481          *
    482          * @var string
    483          */
    484         public $ping_status = 'open';
    485 
    486         /**
    487          *
    488          * @var string
    489          */
    490         public $post_password = '';
    491 
    492         /**
    493          *
    494          * @var string
    495          */
    496         public $post_name = '';
    497 
    498         /**
    499          *
    500          * @var string
    501          */
    502         public $to_ping = '';
    503 
    504         /**
    505          *
    506          * @var string
    507          */
    508         public $pinged = '';
    509 
    510         /**
    511          *
    512          * @var string
    513          */
    514         public $post_modified = '0000-00-00 00:00:00';
    515 
    516         /**
    517          *
    518          * @var string
    519          */
    520         public $post_modified_gmt = '0000-00-00 00:00:00';
    521 
    522         /**
    523          *
    524          * @var string
    525          */
    526         public $post_content_filtered = '';
    527 
    528         /**
    529          *
    530          * @var int
    531          */
    532         public $post_parent = 0;
    533 
    534         /**
    535          *
    536          * @var string
    537          */
    538         public $guid = '';
    539 
    540         /**
    541          *
    542          * @var int
    543          */
    544         public $menu_order = 0;
    545 
    546         /**
    547          *
    548          * @var string
    549          */
    550         public $post_type = 'post';
    551 
    552         /**
    553          *
    554          * @var string
    555          */
    556         public $post_mime_type = '';
    557 
    558         /**
    559          *
    560          * @var int
    561          */
    562         public $comment_count = 0;
    563 
    564         /**
    565          *
    566          * @var string
    567          */
    568         public $filter;
    569 
    570         public static function get_instance( $post_id ) {
    571                 global $wpdb;
    572 
    573                 $post_id = (int) $post_id;
    574                 if ( ! $post_id )
    575                         return false;
    576 
    577                 $_post = wp_cache_get( $post_id, 'posts' );
    578 
    579                 if ( ! $_post ) {
    580                         $_post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post_id ) );
    581 
    582                         if ( ! $_post )
    583                                 return false;
    584 
    585                         $_post = sanitize_post( $_post, 'raw' );
    586                         wp_cache_add( $_post->ID, $_post, 'posts' );
    587                 } elseif ( empty( $_post->filter ) ) {
    588                         $_post = sanitize_post( $_post, 'raw' );
    589                 }
    590 
    591                 return new WP_Post( $_post );
    592         }
    593 
    594         public function __construct( $post ) {
    595                 foreach ( get_object_vars( $post ) as $key => $value )
    596                         $this->$key = $value;
    597         }
    598 
    599         public function __isset( $key ) {
    600                 if ( 'ancestors' == $key )
    601                         return true;
    602 
    603                 if ( 'page_template' == $key )
    604                         return ( 'page' == $this->post_type );
    605 
    606                 if ( 'post_category' == $key )
    607                    return true;
    608 
    609                 if ( 'tags_input' == $key )
    610                    return true;
    611 
    612                 return metadata_exists( 'post', $this->ID, $key );
    613         }
    614 
    615         public function __get( $key ) {
    616                 if ( 'page_template' == $key && $this->__isset( $key ) ) {
    617                         return get_post_meta( $this->ID, '_wp_page_template', true );
    618                 }
    619 
    620                 if ( 'post_category' == $key ) {
    621                         if ( is_object_in_taxonomy( $this->post_type, 'category' ) )
    622                                 $terms = get_the_terms( $this, 'category' );
    623 
    624                         if ( empty( $terms ) )
    625                                 return array();
    626 
    627                         return wp_list_pluck( $terms, 'term_id' );
    628                 }
    629 
    630                 if ( 'tags_input' == $key ) {
    631                         if ( is_object_in_taxonomy( $this->post_type, 'post_tag' ) )
    632                                 $terms = get_the_terms( $this, 'post_tag' );
    633 
    634                         if ( empty( $terms ) )
    635                                 return array();
    636 
    637                         return wp_list_pluck( $terms, 'name' );
    638                 }
    639 
    640                 // Rest of the values need filtering
    641 
    642                 if ( 'ancestors' == $key )
    643                         $value = get_post_ancestors( $this );
    644                 else
    645                         $value = get_post_meta( $this->ID, $key, true );
    646 
    647                 if ( $this->filter )
    648                         $value = sanitize_post_field( $key, $value, $this->ID, $this->filter );
    649 
    650                 return $value;
    651         }
    652 
    653         public function filter( $filter ) {
    654                 if ( $this->filter == $filter )
    655                         return $this;
    656 
    657                 if ( $filter == 'raw' )
    658                         return self::get_instance( $this->ID );
    659 
    660                 return sanitize_post( $this, $filter );
    661         }
    662 
    663         public function to_array() {
    664                 $post = get_object_vars( $this );
    665 
    666                 foreach ( array( 'ancestors', 'page_template', 'post_category', 'tags_input' ) as $key ) {
    667                         if ( $this->__isset( $key ) )
    668                                 $post[ $key ] = $this->__get( $key );
    669                 }
    670 
    671                 return $post;
    672         }
    673 }
    674 
    675 /**
    676  * Retrieve ancestors of a post.
    677  *
    678  * @since 2.5.0
    679  *
    680  * @param int|object $post Post ID or post object
    681  * @return array Ancestor IDs or empty array if none are found.
    682  */
    683 function get_post_ancestors( $post ) {
    684         if ( ! $post )
    685                 return array();
    686 
    687         $post = get_post( $post );
    688 
    689         if ( empty( $post->post_parent ) || $post->post_parent == $post->ID )
    690                 return array();
    691 
    692         $ancestors = array();
    693 
    694         $id = $ancestors[] = $post->post_parent;
    695 
    696         while ( $ancestor = get_post( $id ) ) {
    697                 // Loop detection: If the ancestor has been seen before, break.
    698                 if ( empty( $ancestor->post_parent ) || ( $ancestor->post_parent == $post->ID ) || in_array( $ancestor->post_parent, $ancestors ) )
    699                         break;
    700 
    701                 $id = $ancestors[] = $ancestor->post_parent;
    702         }
    703 
    704         return $ancestors;
    705 }
    706 
    707 /**
    708  * Retrieve data from a post field based on Post ID.
    709  *
    710  * Examples of the post field will be, 'post_type', 'post_status', 'post_content',
    711  * etc and based off of the post object property or key names.
    712  *
    713  * The context values are based off of the taxonomy filter functions and
    714  * supported values are found within those functions.
    715  *
    716  * @since 2.3.0
    717  * @uses sanitize_post_field() See for possible $context values.
    718  *
    719  * @param string $field Post field name
    720  * @param id $post Post ID
    721  * @param string $context Optional. How to filter the field. Default is display.
    722  * @return bool|string False on failure or returns the value in post field
    723  */
    724 function get_post_field( $field, $post, $context = 'display' ) {
    725         $post = get_post( $post );
    726 
    727         if ( !$post )
    728                 return '';
    729 
    730         if ( !isset($post->$field) )
    731                 return '';
    732 
    733         return sanitize_post_field($field, $post->$field, $post->ID, $context);
    734 }
    735 
    736 /**
    737  * Retrieve the mime type of an attachment based on the ID.
    738  *
    739  * This function can be used with any post type, but it makes more sense with
    740  * attachments.
    741  *
    742  * @since 2.0.0
    743  *
    744  * @param int $ID Optional. Post ID.
    745  * @return bool|string False on failure or returns the mime type
    746  */
    747 function get_post_mime_type($ID = '') {
    748         $post = get_post($ID);
    749 
    750         if ( is_object($post) )
    751                 return $post->post_mime_type;
    752 
    753         return false;
    754 }
    755 
    756 /**
    757  * Retrieve the format slug for a post
    758  *
    759  * @since 3.1.0
    760  *
    761  * @param int|object $post A post
    762  *
    763  * @return mixed The format if successful. False if no format is set. WP_Error if errors.
    764  */
    765 function get_post_format( $post = null ) {
    766         $post = get_post($post);
    767 
    768         if ( ! post_type_supports( $post->post_type, 'post-formats' ) )
    769                 return false;
    770 
    771         $_format = get_the_terms( $post->ID, 'post_format' );
    772 
    773         if ( empty( $_format ) )
    774                 return false;
    775 
    776         $format = array_shift( $_format );
    777 
    778         return ( str_replace('post-format-', '', $format->slug ) );
    779 }
    780 
    781 /**
    782  * Check if a post has a particular format
    783  *
    784  * @since 3.1.0
    785  * @uses has_term()
    786  *
    787  * @param string $format The format to check for
    788  * @param object|id $post The post to check. If not supplied, defaults to the current post if used in the loop.
    789  * @return bool True if the post has the format, false otherwise.
    790  */
    791 function has_post_format( $format, $post = null ) {
    792         return has_term('post-format-' . sanitize_key($format), 'post_format', $post);
    793 }
    794 
    795 /**
    796  * Assign a format to a post
    797  *
    798  * @since 3.1.0
    799  *
    800  * @param int|object $post The post for which to assign a format
    801  * @param string $format  A format to assign. Use an empty string or array to remove all formats from the post.
    802  * @return mixed WP_Error on error. Array of affected term IDs on success.
    803  */
    804 function set_post_format( $post, $format ) {
    805         $post = get_post($post);
    806 
    807         if ( empty($post) )
    808                 return new WP_Error('invalid_post', __('Invalid post'));
    809 
    810         if ( !empty($format) ) {
    811                 $format = sanitize_key($format);
    812                 if ( 'standard' == $format || !in_array( $format, array_keys( get_post_format_slugs() ) ) )
    813                         $format = '';
    814                 else
    815                         $format = 'post-format-' . $format;
    816         }
    817 
    818         return wp_set_post_terms($post->ID, $format, 'post_format');
    819 }
    820 
    821 /**
    822  * Retrieve the post status based on the Post ID.
    823  *
    824  * If the post ID is of an attachment, then the parent post status will be given
    825  * instead.
    826  *
    827  * @since 2.0.0
    828  *
    829  * @param int $ID Post ID
    830  * @return string|bool Post status or false on failure.
    831  */
    832 function get_post_status($ID = '') {
    833         $post = get_post($ID);
    834 
    835         if ( !is_object($post) )
    836                 return false;
    837 
    838         if ( 'attachment' == $post->post_type ) {
    839                 if ( 'private' == $post->post_status )
    840                         return 'private';
    841 
    842                 // Unattached attachments are assumed to be published
    843                 if ( ( 'inherit' == $post->post_status ) && ( 0 == $post->post_parent) )
    844                         return 'publish';
    845 
    846                 // Inherit status from the parent
    847                 if ( $post->post_parent && ( $post->ID != $post->post_parent ) )
    848                         return get_post_status($post->post_parent);
    849         }
    850 
    851         return $post->post_status;
    852 }
    853 
    854 /**
    855  * Retrieve all of the WordPress supported post statuses.
    856  *
    857  * Posts have a limited set of valid status values, this provides the
    858  * post_status values and descriptions.
    859  *
    860  * @since 2.5.0
    861  *
    862  * @return array List of post statuses.
    863  */
    864 function get_post_statuses() {
    865         $status = array(
    866                 'draft'                 => __('Draft'),
    867                 'pending'               => __('Pending Review'),
    868                 'private'               => __('Private'),
    869                 'publish'               => __('Published')
    870         );
    871 
    872         return $status;
    873 }
    874 
    875 /**
    876  * Retrieve all of the WordPress support page statuses.
    877  *
    878  * Pages have a limited set of valid status values, this provides the
    879  * post_status values and descriptions.
    880  *
    881  * @since 2.5.0
    882  *
    883  * @return array List of page statuses.
    884  */
    885 function get_page_statuses() {
    886         $status = array(
    887                 'draft'                 => __('Draft'),
    888                 'private'               => __('Private'),
    889                 'publish'               => __('Published')
    890         );
    891 
    892         return $status;
    893 }
    894 
    895 /**
    896  * Register a post status. Do not use before init.
    897  *
    898  * A simple function for creating or modifying a post status based on the
    899  * parameters given. The function will accept an array (second optional
    900  * parameter), along with a string for the post status name.
    901  *
    902  *
    903  * Optional $args contents:
    904  *
    905  * label - A descriptive name for the post status marked for translation. Defaults to $post_status.
    906  * public - Whether posts of this status should be shown in the front end of the site. Defaults to true.
    907  * exclude_from_search - Whether to exclude posts with this post status from search results. Defaults to false.
    908  * show_in_admin_all_list - Whether to include posts in the edit listing for their post type
    909  * show_in_admin_status_list - Show in the list of statuses with post counts at the top of the edit
    910  *                             listings, e.g. All (12) | Published (9) | My Custom Status (2) ...
    911  *
    912  * Arguments prefixed with an _underscore shouldn't be used by plugins and themes.
    913  *
    914  * @package WordPress
    915  * @subpackage Post
    916  * @since 3.0.0
    917  * @uses $wp_post_statuses Inserts new post status object into the list
    918  *
    919  * @param string $post_status Name of the post status.
    920  * @param array|string $args See above description.
    921  */
    922 function register_post_status($post_status, $args = array()) {
    923         global $wp_post_statuses;
    924 
    925         if (!is_array($wp_post_statuses))
    926                 $wp_post_statuses = array();
    927 
    928         // Args prefixed with an underscore are reserved for internal use.
    929         $defaults = array(
    930                 'label' => false,
    931                 'label_count' => false,
    932                 'exclude_from_search' => null,
    933                 '_builtin' => false,
    934                 'public' => null,
    935                 'internal' => null,
    936                 'protected' => null,
    937                 'private' => null,
    938                 'publicly_queryable' => null,
    939                 'show_in_admin_status_list' => null,
    940                 'show_in_admin_all_list' => null,
    941         );
    942         $args = wp_parse_args($args, $defaults);
    943         $args = (object) $args;
    944 
    945         $post_status = sanitize_key($post_status);
    946         $args->name = $post_status;
    947 
    948         if ( null === $args->public && null === $args->internal && null === $args->protected && null === $args->private )
    949                 $args->internal = true;
    950 
    951         if ( null === $args->public  )
    952                 $args->public = false;
    953 
    954         if ( null === $args->private  )
    955                 $args->private = false;
    956 
    957         if ( null === $args->protected  )
    958                 $args->protected = false;
    959 
    960         if ( null === $args->internal  )
    961                 $args->internal = false;
    962 
    963         if ( null === $args->publicly_queryable )
    964                 $args->publicly_queryable = $args->public;
    965 
    966         if ( null === $args->exclude_from_search )
    967                 $args->exclude_from_search = $args->internal;
    968 
    969         if ( null === $args->show_in_admin_all_list )
    970                 $args->show_in_admin_all_list = !$args->internal;
    971 
    972         if ( null === $args->show_in_admin_status_list )
    973                 $args->show_in_admin_status_list = !$args->internal;
    974 
    975         if ( false === $args->label )
    976                 $args->label = $post_status;
    977 
    978         if ( false === $args->label_count )
    979                 $args->label_count = array( $args->label, $args->label );
    980 
    981         $wp_post_statuses[$post_status] = $args;
    982 
    983         return $args;
    984 }
    985 
    986 /**
    987  * Retrieve a post status object by name
    988  *
    989  * @package WordPress
    990  * @subpackage Post
    991  * @since 3.0.0
    992  * @uses $wp_post_statuses
    993  * @see register_post_status
    994  * @see get_post_statuses
    995  *
    996  * @param string $post_status The name of a registered post status
    997  * @return object A post status object
    998  */
    999 function get_post_status_object( $post_status ) {
    1000         global $wp_post_statuses;
    1001 
    1002         if ( empty($wp_post_statuses[$post_status]) )
    1003                 return null;
    1004 
    1005         return $wp_post_statuses[$post_status];
    1006 }
    1007 
    1008 /**
    1009  * Get a list of all registered post status objects.
    1010  *
    1011  * @package WordPress
    1012  * @subpackage Post
    1013  * @since 3.0.0
    1014  * @uses $wp_post_statuses
    1015  * @see register_post_status
    1016  * @see get_post_status_object
    1017  *
    1018  * @param array|string $args An array of key => value arguments to match against the post status objects.
    1019  * @param string $output The type of output to return, either post status 'names' or 'objects'. 'names' is the default.
    1020  * @param string $operator The logical operation to perform. 'or' means only one element
    1021  *  from the array needs to match; 'and' means all elements must match. The default is 'and'.
    1022  * @return array A list of post status names or objects
    1023  */
    1024 function get_post_stati( $args = array(), $output = 'names', $operator = 'and' ) {
    1025         global $wp_post_statuses;
    1026 
    1027         $field = ('names' == $output) ? 'name' : false;
    1028 
    1029         return wp_filter_object_list($wp_post_statuses, $args, $operator, $field);
    1030 }
    1031 
    1032 /**
    1033  * Whether the post type is hierarchical.
    1034  *
    1035  * A false return value might also mean that the post type does not exist.
    1036  *
    1037  * @since 3.0.0
    1038  * @see get_post_type_object
    1039  *
    1040  * @param string $post_type Post type name
    1041  * @return bool Whether post type is hierarchical.
    1042  */
    1043 function is_post_type_hierarchical( $post_type ) {
    1044         if ( ! post_type_exists( $post_type ) )
    1045                 return false;
    1046 
    1047         $post_type = get_post_type_object( $post_type );
    1048         return $post_type->hierarchical;
    1049 }
    1050 
    1051 /**
    1052  * Checks if a post type is registered.
    1053  *
    1054  * @since 3.0.0
    1055  * @uses get_post_type_object()
    1056  *
    1057  * @param string $post_type Post type name
    1058  * @return bool Whether post type is registered.
    1059  */
    1060 function post_type_exists( $post_type ) {
    1061         return (bool) get_post_type_object( $post_type );
    1062 }
    1063 
    1064 /**
    1065  * Retrieve the post type of the current post or of a given post.
    1066  *
    1067  * @since 2.1.0
    1068  *
    1069  * @uses $post The Loop current post global
    1070  *
    1071  * @param mixed $post Optional. Post object or post ID.
    1072  * @return bool|string post type or false on failure.
    1073  */
    1074 function get_post_type( $post = null ) {
    1075         if ( $post = get_post( $post ) )
    1076                 return $post->post_type;
    1077 
    1078         return false;
    1079 }
    1080 
    1081 /**
    1082  * Retrieve a post type object by name
    1083  *
    1084  * @package WordPress
    1085  * @subpackage Post
    1086  * @since 3.0.0
    1087  * @uses $wp_post_types
    1088  * @see register_post_type
    1089  * @see get_post_types
    1090  *
    1091  * @param string $post_type The name of a registered post type
    1092  * @return object A post type object
    1093  */
    1094 function get_post_type_object( $post_type ) {
    1095         global $wp_post_types;
    1096 
    1097         if ( empty($wp_post_types[$post_type]) )
    1098                 return null;
    1099 
    1100         return $wp_post_types[$post_type];
    1101 }
    1102 
    1103 /**
    1104  * Get a list of all registered post type objects.
    1105  *
    1106  * @package WordPress
    1107  * @subpackage Post
    1108  * @since 2.9.0
    1109  * @uses $wp_post_types
    1110  * @see register_post_type
    1111  *
    1112  * @param array|string $args An array of key => value arguments to match against the post type objects.
    1113  * @param string $output The type of output to return, either post type 'names' or 'objects'. 'names' is the default.
    1114  * @param string $operator The logical operation to perform. 'or' means only one element
    1115  *  from the array needs to match; 'and' means all elements must match. The default is 'and'.
    1116  * @return array A list of post type names or objects
    1117  */
    1118 function get_post_types( $args = array(), $output = 'names', $operator = 'and' ) {
    1119         global $wp_post_types;
    1120 
    1121         $field = ('names' == $output) ? 'name' : false;
    1122 
    1123         return wp_filter_object_list($wp_post_types, $args, $operator, $field);
    1124 }
    1125 
    1126 /**
    1127  * Register a post type. Do not use before init.
    1128  *
    1129  * A function for creating or modifying a post type based on the
    1130  * parameters given. The function will accept an array (second optional
    1131  * parameter), along with a string for the post type name.
    1132  *
    1133  * Optional $args contents:
    1134  *
    1135  * - label - Name of the post type shown in the menu. Usually plural. If not set, labels['name'] will be used.
    1136  * - labels - An array of labels for this post type.
    1137  *     * If not set, post labels are inherited for non-hierarchical types and page labels for hierarchical ones.
    1138  *     * You can see accepted values in {@link get_post_type_labels()}.
    1139  * - description - A short descriptive summary of what the post type is. Defaults to blank.
    1140  * - public - Whether a post type is intended for use publicly either via the admin interface or by front-end users.
    1141  *     * Defaults to false.
    1142  *     * While the default settings of exclude_from_search, publicly_queryable, show_ui, and show_in_nav_menus are
    1143  *       inherited from public, each does not rely on this relationship and controls a very specific intention.
    1144  * - exclude_from_search - Whether to exclude posts with this post type from front end search results.
    1145  *     * If not set, the the opposite of public's current value is used.
    1146  * - publicly_queryable - Whether queries can be performed on the front end for the post type as part of parse_request().
    1147  *     * ?post_type={post_type_key}
    1148  *     * ?{post_type_key}={single_post_slug}
    1149  *     * ?{post_type_query_var}={single_post_slug}
    1150  *     * If not set, the default is inherited from public.
    1151  * - show_ui - Whether to generate a default UI for managing this post type in the admin.
    1152  *     * If not set, the default is inherited from public.
    1153  * - show_in_nav_menus - Makes this post type available for selection in navigation menus.
    1154  *     * If not set, the default is inherited from public.
    1155  * - show_in_menu - Where to show the post type in the admin menu.
    1156  *     * If true, the post type is shown in its own top level menu.
    1157  *     * If false, no menu is shown
    1158  *     * If a string of an existing top level menu (eg. 'tools.php' or 'edit.php?post_type=page'), the post type will
    1159  *       be placed as a sub menu of that.
    1160  *     * show_ui must be true.
    1161  *     * If not set, the default is inherited from show_ui
    1162  * - show_in_admin_bar - Makes this post type available via the admin bar.
    1163  *     * If not set, the default is inherited from show_in_menu
    1164  * - menu_position - The position in the menu order the post type should appear.
    1165  *     * show_in_menu must be true
    1166  *     * Defaults to null, which places it at the bottom of its area.
    1167  * - menu_icon - The url to the icon to be used for this menu. Defaults to use the posts icon.
    1168  * - capability_type - The string to use to build the read, edit, and delete capabilities. Defaults to 'post'.
    1169  *     * May be passed as an array to allow for alternative plurals when using this argument as a base to construct the
    1170  *       capabilities, e.g. array('story', 'stories').
    1171  * - capabilities - Array of capabilities for this post type.
    1172  *     * By default the capability_type is used as a base to construct capabilities.
    1173  *     * You can see accepted values in {@link get_post_type_capabilities()}.
    1174  * - map_meta_cap - Whether to use the internal default meta capability handling. Defaults to false.
    1175  * - hierarchical - Whether the post type is hierarchical (e.g. page). Defaults to false.
    1176  * - supports - An alias for calling add_post_type_support() directly. Defaults to title and editor.
    1177  *     * See {@link add_post_type_support()} for documentation.
    1178  * - register_meta_box_cb - Provide a callback function that will be called when setting up the
    1179  *     meta boxes for the edit form. Do remove_meta_box() and add_meta_box() calls in the callback.
    1180  * - taxonomies - An array of taxonomy identifiers that will be registered for the post type.
    1181  *     * Default is no taxonomies.
    1182  *     * Taxonomies can be registered later with register_taxonomy() or register_taxonomy_for_object_type().
    1183  * - has_archive - True to enable post type archives. Default is false.
    1184  *     * Will generate the proper rewrite rules if rewrite is enabled.
    1185  * - rewrite - Triggers the handling of rewrites for this post type. Defaults to true, using $post_type as slug.
    1186  *     * To prevent rewrite, set to false.
    1187  *     * To specify rewrite rules, an array can be passed with any of these keys
    1188  *         * 'slug' => string Customize the permastruct slug. Defaults to $post_type key
    1189  *         * 'with_front' => bool Should the permastruct be prepended with WP_Rewrite::$front. Defaults to true.
    1190  *         * 'feeds' => bool Should a feed permastruct be built for this post type. Inherits default from has_archive.
    1191  *         * 'pages' => bool Should the permastruct provide for pagination. Defaults to true.
    1192  *         * 'ep_mask' => const Assign an endpoint mask.
    1193  *             * If not specified and permalink_epmask is set, inherits from permalink_epmask.
    1194  *             * If not specified and permalink_epmask is not set, defaults to EP_PERMALINK
    1195  * - query_var - Sets the query_var key for this post type. Defaults to $post_type key
    1196  *     * If false, a post type cannot be loaded at ?{query_var}={post_slug}
    1197  *     * If specified as a string, the query ?{query_var_string}={post_slug} will be valid.
    1198  * - can_export - Allows this post type to be exported. Defaults to true.
    1199  * - delete_with_user - Whether to delete posts of this type when deleting a user.
    1200  *     * If true, posts of this type belonging to the user will be moved to trash when then user is deleted.
    1201  *     * If false, posts of this type belonging to the user will *not* be trashed or deleted.
    1202  *     * If not set (the default), posts are trashed if post_type_supports('author'). Otherwise posts are not trashed or deleted.
    1203  * - _builtin - true if this post type is a native or "built-in" post_type. THIS IS FOR INTERNAL USE ONLY!
    1204  * - _edit_link - URL segement to use for edit link of this post type. THIS IS FOR INTERNAL USE ONLY!
    1205  *
    1206  * @since 2.9.0
    1207  * @uses $wp_post_types Inserts new post type object into the list
    1208  *
    1209  * @param string $post_type Post type key, must not exceed 20 characters
    1210  * @param array|string $args See optional args description above.
    1211  * @return object|WP_Error the registered post type object, or an error object
    1212  */
    1213 function register_post_type( $post_type, $args = array() ) {
    1214         global $wp_post_types, $wp_rewrite, $wp;
    1215 
    1216         if ( !is_array($wp_post_types) )
    1217                 $wp_post_types = array();
    1218 
    1219         // Args prefixed with an underscore are reserved for internal use.
    1220         $defaults = array(
    1221                 'labels' => array(), 'description' => '', 'publicly_queryable' => null, 'exclude_from_search' => null,
    1222                 'capability_type' => 'post', 'capabilities' => array(), 'map_meta_cap' => null,
    1223                 '_builtin' => false, '_edit_link' => 'post.php?post=%d', 'hierarchical' => false,
    1224                 'public' => false, 'rewrite' => true, 'has_archive' => false, 'query_var' => true,
    1225                 'supports' => array(), 'register_meta_box_cb' => null,
    1226                 'taxonomies' => array(), 'show_ui' => null, 'menu_position' => null, 'menu_icon' => null,
    1227                 'can_export' => true,
    1228                 'show_in_nav_menus' => null, 'show_in_menu' => null, 'show_in_admin_bar' => null,
    1229                 'delete_with_user' => null,
    1230         );
    1231         $args = wp_parse_args($args, $defaults);
    1232         $args = (object) $args;
    1233 
    1234         $post_type = sanitize_key($post_type);
    1235         $args->name = $post_type;
    1236 
    1237         if ( strlen( $post_type ) > 20 )
    1238                         return new WP_Error( 'post_type_too_long', __( 'Post types cannot exceed 20 characters in length' ) );
    1239 
    1240         // If not set, default to the setting for public.
    1241         if ( null === $args->publicly_queryable )
    1242                 $args->publicly_queryable = $args->public;
    1243 
    1244         // If not set, default to the setting for public.
    1245         if ( null === $args->show_ui )
    1246                 $args->show_ui = $args->public;
    1247 
    1248         // If not set, default to the setting for show_ui.
    1249         if ( null === $args->show_in_menu || ! $args->show_ui )
    1250                 $args->show_in_menu = $args->show_ui;
    1251 
    1252         // If not set, default to the whether the full UI is shown.
    1253         if ( null === $args->show_in_admin_bar )
    1254                 $args->show_in_admin_bar = true === $args->show_in_menu;
    1255 
    1256         // Whether to show this type in nav-menus.php. Defaults to the setting for public.
    1257         if ( null === $args->show_in_nav_menus )
    1258                 $args->show_in_nav_menus = $args->public;
    1259 
    1260         // If not set, default to true if not public, false if public.
    1261         if ( null === $args->exclude_from_search )
    1262                 $args->exclude_from_search = !$args->public;
    1263 
    1264         // Back compat with quirky handling in version 3.0. #14122
    1265         if ( empty( $args->capabilities ) && null === $args->map_meta_cap && in_array( $args->capability_type, array( 'post', 'page' ) ) )
    1266                 $args->map_meta_cap = true;
    1267 
    1268         if ( null === $args->map_meta_cap )
    1269                 $args->map_meta_cap = false;
    1270 
    1271         $args->cap = get_post_type_capabilities( $args );
    1272         unset($args->capabilities);
    1273 
    1274         if ( is_array( $args->capability_type ) )
    1275                 $args->capability_type = $args->capability_type[0];
    1276 
    1277         if ( ! empty($args->supports) ) {
    1278                 add_post_type_support($post_type, $args->supports);
    1279                 unset($args->supports);
    1280         } elseif ( false !== $args->supports ) {
    1281                 // Add default features
    1282                 add_post_type_support($post_type, array('title', 'editor'));
    1283         }
    1284 
    1285         if ( false !== $args->query_var && !empty($wp) ) {
    1286                 if ( true === $args->query_var )
    1287                         $args->query_var = $post_type;
    1288                 else
    1289                         $args->query_var = sanitize_title_with_dashes($args->query_var);
    1290                 $wp->add_query_var($args->query_var);
    1291         }
    1292 
    1293         if ( false !== $args->rewrite && ( is_admin() || '' != get_option('permalink_structure') ) ) {
    1294                 if ( ! is_array( $args->rewrite ) )
    1295                         $args->rewrite = array();
    1296                 if ( empty( $args->rewrite['slug'] ) )
    1297                         $args->rewrite['slug'] = $post_type;
    1298                 if ( ! isset( $args->rewrite['with_front'] ) )
    1299                         $args->rewrite['with_front'] = true;
    1300                 if ( ! isset( $args->rewrite['pages'] ) )
    1301                         $args->rewrite['pages'] = true;
    1302                 if ( ! isset( $args->rewrite['feeds'] ) || ! $args->has_archive )
    1303                         $args->rewrite['feeds'] = (bool) $args->has_archive;
    1304                 if ( ! isset( $args->rewrite['ep_mask'] ) ) {
    1305                         if ( isset( $args->permalink_epmask ) )
    1306                                 $args->rewrite['ep_mask'] = $args->permalink_epmask;
    1307                         else
    1308                                 $args->rewrite['ep_mask'] = EP_PERMALINK;
    1309                 }
    1310 
    1311                 if ( $args->hierarchical )
    1312                         add_rewrite_tag("%$post_type%", '(.+?)', $args->query_var ? "{$args->query_var}=" : "post_type=$post_type&name=");
    1313                 else
    1314                         add_rewrite_tag("%$post_type%", '([^/]+)', $args->query_var ? "{$args->query_var}=" : "post_type=$post_type&name=");
    1315 
    1316                 if ( $args->has_archive ) {
    1317                         $archive_slug = $args->has_archive === true ? $args->rewrite['slug'] : $args->has_archive;
    1318                         if ( $args->rewrite['with_front'] )
    1319                                 $archive_slug = substr( $wp_rewrite->front, 1 ) . $archive_slug;
    1320                         else
    1321                                 $archive_slug = $wp_rewrite->root . $archive_slug;
    1322 
    1323                         add_rewrite_rule( "{$archive_slug}/?$", "index.php?post_type=$post_type", 'top' );
    1324                         if ( $args->rewrite['feeds'] && $wp_rewrite->feeds ) {
    1325                                 $feeds = '(' . trim( implode( '|', $wp_rewrite->feeds ) ) . ')';
    1326                                 add_rewrite_rule( "{$archive_slug}/feed/$feeds/?$", "index.php?post_type=$post_type" . '&feed=$matches[1]', 'top' );
    1327                                 add_rewrite_rule( "{$archive_slug}/$feeds/?$", "index.php?post_type=$post_type" . '&feed=$matches[1]', 'top' );
    1328                         }
    1329                         if ( $args->rewrite['pages'] )
    1330                                 add_rewrite_rule( "{$archive_slug}/{$wp_rewrite->pagination_base}/([0-9]{1,})/?$", "index.php?post_type=$post_type" . '&paged=$matches[1]', 'top' );
    1331                 }
    1332 
    1333                 add_permastruct( $post_type, "{$args->rewrite['slug']}/%$post_type%", $args->rewrite );
    1334         }
    1335 
    1336         if ( $args->register_meta_box_cb )
    1337                 add_action('add_meta_boxes_' . $post_type, $args->register_meta_box_cb, 10, 1);
    1338 
    1339         $args->labels = get_post_type_labels( $args );
    1340         $args->label = $args->labels->name;
    1341 
    1342         $wp_post_types[$post_type] = $args;
    1343 
    1344         add_action( 'future_' . $post_type, '_future_post_hook', 5, 2 );
    1345 
    1346         foreach ( $args->taxonomies as $taxonomy ) {
    1347                 register_taxonomy_for_object_type( $taxonomy, $post_type );
    1348         }
    1349 
    1350         do_action( 'registered_post_type', $post_type, $args );
    1351 
    1352         return $args;
    1353 }
    1354 
    1355 /**
    1356  * Builds an object with all post type capabilities out of a post type object
    1357  *
    1358  * Post type capabilities use the 'capability_type' argument as a base, if the
    1359  * capability is not set in the 'capabilities' argument array or if the
    1360  * 'capabilities' argument is not supplied.
    1361  *
    1362  * The capability_type argument can optionally be registered as an array, with
    1363  * the first value being singular and the second plural, e.g. array('story, 'stories')
    1364  * Otherwise, an 's' will be added to the value for the plural form. After
    1365  * registration, capability_type will always be a string of the singular value.
    1366  *
    1367  * By default, seven keys are accepted as part of the capabilities array:
    1368  *
    1369  * - edit_post, read_post, and delete_post are meta capabilities, which are then
    1370  *   generally mapped to corresponding primitive capabilities depending on the
    1371  *   context, which would be the post being edited/read/deleted and the user or
    1372  *   role being checked. Thus these capabilities would generally not be granted
    1373  *   directly to users or roles.
    1374  *
    1375  * - edit_posts - Controls whether objects of this post type can be edited.
    1376  * - edit_others_posts - Controls whether objects of this type owned by other users
    1377  *   can be edited. If the post type does not support an author, then this will
    1378  *   behave like edit_posts.
    1379  * - publish_posts - Controls publishing objects of this post type.
    1380  * - read_private_posts - Controls whether private objects can be read.
    1381  *
    1382  * These four primitive capabilities are checked in core in various locations.
    1383  * There are also seven other primitive capabilities which are not referenced
    1384  * directly in core, except in map_meta_cap(), which takes the three aforementioned
    1385  * meta capabilities and translates them into one or more primitive capabilities
    1386  * that must then be checked against the user or role, depending on the context.
    1387  *
    1388  * - read - Controls whether objects of this post type can be read.
    1389  * - delete_posts - Controls whether objects of this post type can be deleted.
    1390  * - delete_private_posts - Controls whether private objects can be deleted.
    1391  * - delete_published_posts - Controls whether published objects can be deleted.
    1392  * - delete_others_posts - Controls whether objects owned by other users can be
    1393  *   can be deleted. If the post type does not support an author, then this will
    1394  *   behave like delete_posts.
    1395  * - edit_private_posts - Controls whether private objects can be edited.
    1396  * - edit_published_posts - Controls whether published objects can be edited.
    1397  *
    1398  * These additional capabilities are only used in map_meta_cap(). Thus, they are
    1399  * only assigned by default if the post type is registered with the 'map_meta_cap'
    1400  * argument set to true (default is false).
    1401  *
    1402  * @see map_meta_cap()
    1403  * @since 3.0.0
    1404  *
    1405  * @param object $args Post type registration arguments
    1406  * @return object object with all the capabilities as member variables
    1407  */
    1408 function get_post_type_capabilities( $args ) {
    1409         if ( ! is_array( $args->capability_type ) )
    1410                 $args->capability_type = array( $args->capability_type, $args->capability_type . 's' );
    1411 
    1412         // Singular base for meta capabilities, plural base for primitive capabilities.
    1413         list( $singular_base, $plural_base ) = $args->capability_type;
    1414 
    1415         $default_capabilities = array(
    1416                 // Meta capabilities
    1417                 'edit_post'          => 'edit_'         . $singular_base,
    1418                 'read_post'          => 'read_'         . $singular_base,
    1419                 'delete_post'        => 'delete_'       . $singular_base,
    1420                 // Primitive capabilities used outside of map_meta_cap():
    1421                 'edit_posts'         => 'edit_'         . $plural_base,
    1422                 'edit_others_posts'  => 'edit_others_'  . $plural_base,
    1423                 'publish_posts'      => 'publish_'      . $plural_base,
    1424                 'read_private_posts' => 'read_private_' . $plural_base,
    1425         );
    1426 
    1427         // Primitive capabilities used within map_meta_cap():
    1428         if ( $args->map_meta_cap ) {
    1429                 $default_capabilities_for_mapping = array(
    1430                         'read'                   => 'read',
    1431                         'delete_posts'           => 'delete_'           . $plural_base,
    1432                         'delete_private_posts'   => 'delete_private_'   . $plural_base,
    1433                         'delete_published_posts' => 'delete_published_' . $plural_base,
    1434                         'delete_others_posts'    => 'delete_others_'    . $plural_base,
    1435                         'edit_private_posts'     => 'edit_private_'     . $plural_base,
    1436                         'edit_published_posts'   => 'edit_published_'   . $plural_base,
    1437                 );
    1438                 $default_capabilities = array_merge( $default_capabilities, $default_capabilities_for_mapping );
    1439         }
    1440 
    1441         $capabilities = array_merge( $default_capabilities, $args->capabilities );
    1442 
    1443         // Post creation capability simply maps to edit_posts by default:
    1444         if ( ! isset( $capabilities['create_posts'] ) )
    1445                 $capabilities['create_posts'] = $capabilities['edit_posts'];
    1446 
    1447         // Remember meta capabilities for future reference.
    1448         if ( $args->map_meta_cap )
    1449                 _post_type_meta_capabilities( $capabilities );
    1450 
    1451         return (object) $capabilities;
    1452 }
    1453 
    1454 /**
    1455  * Stores or returns a list of post type meta caps for map_meta_cap().
    1456  *
    1457  * @since 3.1.0
    1458  * @access private
    1459  */
    1460 function _post_type_meta_capabilities( $capabilities = null ) {
    1461         static $meta_caps = array();
    1462         if ( null === $capabilities )
    1463                 return $meta_caps;
    1464         foreach ( $capabilities as $core => $custom ) {
    1465                 if ( in_array( $core, array( 'read_post', 'delete_post', 'edit_post' ) ) )
    1466                         $meta_caps[ $custom ] = $core;
    1467         }
    1468 }
    1469 
    1470 /**
    1471  * Builds an object with all post type labels out of a post type object
    1472  *
    1473  * Accepted keys of the label array in the post type object:
    1474  * - name - general name for the post type, usually plural. The same and overridden by $post_type_object->label. Default is Posts/Pages
    1475  * - singular_name - name for one object of this post type. Default is Post/Page
    1476  * - add_new - Default is Add New for both hierarchical and non-hierarchical types. When internationalizing this string, please use a {@link http://codex.wordpress.org/I18n_for_WordPress_Developers#Disambiguation_by_context gettext context} matching your post type. Example: <code>_x('Add New', 'product');</code>
    1477  * - add_new_item - Default is Add New Post/Add New Page
    1478  * - edit_item - Default is Edit Post/Edit Page
    1479  * - new_item - Default is New Post/New Page
    1480  * - view_item - Default is View Post/View Page
    1481  * - search_items - Default is Search Posts/Search Pages
    1482  * - not_found - Default is No posts found/No pages found
    1483  * - not_found_in_trash - Default is No posts found in Trash/No pages found in Trash
    1484  * - parent_item_colon - This string isn't used on non-hierarchical types. In hierarchical ones the default is Parent Page:
    1485  * - all_items - String for the submenu. Default is All Posts/All Pages
    1486  * - menu_name - Default is the same as <code>name</code>
    1487  *
    1488  * Above, the first default value is for non-hierarchical post types (like posts) and the second one is for hierarchical post types (like pages).
    1489  *
    1490  * @since 3.0.0
    1491  * @param object $post_type_object
    1492  * @return object object with all the labels as member variables
    1493  */
    1494 function get_post_type_labels( $post_type_object ) {
    1495         $nohier_vs_hier_defaults = array(
    1496                 'name' => array( _x('Posts', 'post type general name'), _x('Pages', 'post type general name') ),
    1497                 'singular_name' => array( _x('Post', 'post type singular name'), _x('Page', 'post type singular name') ),
    1498                 'add_new' => array( _x('Add New', 'post'), _x('Add New', 'page') ),
    1499                 'add_new_item' => array( __('Add New Post'), __('Add New Page') ),
    1500                 'edit_item' => array( __('Edit Post'), __('Edit Page') ),
    1501                 'new_item' => array( __('New Post'), __('New Page') ),
    1502                 'view_item' => array( __('View Post'), __('View Page') ),
    1503                 'search_items' => array( __('Search Posts'), __('Search Pages') ),
    1504                 'not_found' => array( __('No posts found.'), __('No pages found.') ),
    1505                 'not_found_in_trash' => array( __('No posts found in Trash.'), __('No pages found in Trash.') ),
    1506                 'parent_item_colon' => array( null, __('Parent Page:') ),
    1507                 'all_items' => array( __( 'All Posts' ), __( 'All Pages' ) )
    1508         );
    1509         $nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];
    1510 
    1511         $labels = _get_custom_object_labels( $post_type_object, $nohier_vs_hier_defaults );
    1512 
    1513         $post_type = $post_type_object->name;
    1514         return apply_filters( "post_type_labels_{$post_type}", $labels );
    1515 }
    1516 
    1517 /**
    1518  * Builds an object with custom-something object (post type, taxonomy) labels out of a custom-something object
    1519  *
    1520  * @access private
    1521  * @since 3.0.0
    1522  */
    1523 function _get_custom_object_labels( $object, $nohier_vs_hier_defaults ) {
    1524 
    1525         if ( isset( $object->label ) && empty( $object->labels['name'] ) )
    1526                 $object->labels['name'] = $object->label;
    1527 
    1528         if ( !isset( $object->labels['singular_name'] ) && isset( $object->labels['name'] ) )
    1529                 $object->labels['singular_name'] = $object->labels['name'];
    1530 
    1531         if ( ! isset( $object->labels['name_admin_bar'] ) )
    1532                 $object->labels['name_admin_bar'] = isset( $object->labels['singular_name'] ) ? $object->labels['singular_name'] : $object->name;
    1533 
    1534         if ( !isset( $object->labels['menu_name'] ) && isset( $object->labels['name'] ) )
    1535                 $object->labels['menu_name'] = $object->labels['name'];
    1536 
    1537         if ( !isset( $object->labels['all_items'] ) && isset( $object->labels['menu_name'] ) )
    1538                 $object->labels['all_items'] = $object->labels['menu_name'];
    1539 
    1540         foreach ( $nohier_vs_hier_defaults as $key => $value )
    1541                         $defaults[$key] = $object->hierarchical ? $value[1] : $value[0];
    1542 
    1543         $labels = array_merge( $defaults, $object->labels );
    1544         return (object)$labels;
    1545 }
    1546 
    1547 /**
    1548  * Adds submenus for post types.
    1549  *
    1550  * @access private
    1551  * @since 3.1.0
    1552  */
    1553 function _add_post_type_submenus() {
    1554         foreach ( get_post_types( array( 'show_ui' => true ) ) as $ptype ) {
    1555                 $ptype_obj = get_post_type_object( $ptype );
    1556                 // Submenus only.
    1557                 if ( ! $ptype_obj->show_in_menu || $ptype_obj->show_in_menu === true )
    1558                         continue;
    1559                 add_submenu_page( $ptype_obj->show_in_menu, $ptype_obj->labels->name, $ptype_obj->labels->all_items, $ptype_obj->cap->edit_posts, "edit.php?post_type=$ptype" );
    1560         }
    1561 }
    1562 add_action( 'admin_menu', '_add_post_type_submenus' );
    1563 
    1564 /**
    1565  * Register support of certain features for a post type.
    1566  *
    1567  * All features are directly associated with a functional area of the edit screen, such as the
    1568  * editor or a meta box: 'title', 'editor', 'comments', 'revisions', 'trackbacks', 'author',
    1569  * 'excerpt', 'page-attributes', 'thumbnail', and 'custom-fields'.
    1570  *
    1571  * Additionally, the 'revisions' feature dictates whether the post type will store revisions,
    1572  * and the 'comments' feature dictates whether the comments count will show on the edit screen.
    1573  *
    1574  * @since 3.0.0
    1575  * @param string $post_type The post type for which to add the feature
    1576  * @param string|array $feature the feature being added, can be an array of feature strings or a single string
    1577  */
    1578 function add_post_type_support( $post_type, $feature ) {
    1579         global $_wp_post_type_features;
    1580 
    1581         $features = (array) $feature;
    1582         foreach ($features as $feature) {
    1583                 if ( func_num_args() == 2 )
    1584                         $_wp_post_type_features[$post_type][$feature] = true;
    1585                 else
    1586                         $_wp_post_type_features[$post_type][$feature] = array_slice( func_get_args(), 2 );
    1587         }
    1588 }
    1589 
    1590 /**
    1591  * Remove support for a feature from a post type.
    1592  *
    1593  * @since 3.0.0
    1594  * @param string $post_type The post type for which to remove the feature
    1595  * @param string $feature The feature being removed
    1596  */
    1597 function remove_post_type_support( $post_type, $feature ) {
    1598         global $_wp_post_type_features;
    1599 
    1600         if ( !isset($_wp_post_type_features[$post_type]) )
    1601                 return;
    1602 
    1603         if ( isset($_wp_post_type_features[$post_type][$feature]) )
    1604                 unset($_wp_post_type_features[$post_type][$feature]);
    1605 }
    1606 
    1607 /**
    1608  * Get all the post type features
    1609  *
    1610  * @since 3.4.0
    1611  * @param string $post_type The post type
    1612  * @return array
    1613  */
    1614 
    1615 function get_all_post_type_supports( $post_type ) {
    1616         global $_wp_post_type_features;
    1617 
    1618         if ( isset( $_wp_post_type_features[$post_type] ) )
    1619                 return $_wp_post_type_features[$post_type];
    1620 
    1621         return array();
    1622 }
    1623 
    1624 /**
    1625  * Checks a post type's support for a given feature
    1626  *
    1627  * @since 3.0.0
    1628  * @param string $post_type The post type being checked
    1629  * @param string $feature the feature being checked
    1630  * @return boolean
    1631  */
    1632 
    1633 function post_type_supports( $post_type, $feature ) {
    1634         global $_wp_post_type_features;
    1635 
    1636         if ( !isset( $_wp_post_type_features[$post_type][$feature] ) )
    1637                 return false;
    1638 
    1639         // If no args passed then no extra checks need be performed
    1640         if ( func_num_args() <= 2 )
    1641                 return true;
    1642 
    1643         // @todo Allow pluggable arg checking
    1644         //$args = array_slice( func_get_args(), 2 );
    1645 
    1646         return true;
    1647 }
    1648 
    1649 /**
    1650  * Updates the post type for the post ID.
    1651  *
    1652  * The page or post cache will be cleaned for the post ID.
    1653  *
    1654  * @since 2.5.0
    1655  *
    1656  * @uses $wpdb
    1657  *
    1658  * @param int $post_id Post ID to change post type. Not actually optional.
    1659  * @param string $post_type Optional, default is post. Supported values are 'post' or 'page' to
    1660  *  name a few.
    1661  * @return int Amount of rows changed. Should be 1 for success and 0 for failure.
    1662  */
    1663 function set_post_type( $post_id = 0, $post_type = 'post' ) {
    1664         global $wpdb;
    1665 
    1666         $post_type = sanitize_post_field('post_type', $post_type, $post_id, 'db');
    1667         $return = $wpdb->update( $wpdb->posts, array('post_type' => $post_type), array('ID' => $post_id) );
    1668 
    1669         clean_post_cache( $post_id );
    1670 
    1671         return $return;
    1672 }
    1673 
    1674 /**
    1675  * Retrieve list of latest posts or posts matching criteria.
    1676  *
    1677  * The defaults are as follows:
    1678  *     'numberposts' - Default is 5. Total number of posts to retrieve.
    1679  *     'offset' - Default is 0. See {@link WP_Query::query()} for more.
    1680  *     'category' - What category to pull the posts from.
    1681  *     'orderby' - Default is 'post_date'. How to order the posts.
    1682  *     'order' - Default is 'DESC'. The order to retrieve the posts.
    1683  *     'include' - See {@link WP_Query::query()} for more.
    1684  *     'exclude' - See {@link WP_Query::query()} for more.
    1685  *     'meta_key' - See {@link WP_Query::query()} for more.
    1686  *     'meta_value' - See {@link WP_Query::query()} for more.
    1687  *     'post_type' - Default is 'post'. Can be 'page', or 'attachment' to name a few.
    1688  *     'post_parent' - The parent of the post or post type.
    1689  *     'post_status' - Default is 'publish'. Post status to retrieve.
    1690  *
    1691  * @since 1.2.0
    1692  * @uses $wpdb
    1693  * @uses WP_Query::query() See for more default arguments and information.
    1694  * @link http://codex.wordpress.org/Template_Tags/get_posts
    1695  *
    1696  * @param array $args Optional. Overrides defaults.
    1697  * @return array List of posts.
    1698  */
    1699 function get_posts($args = null) {
    1700         $defaults = array(
    1701                 'numberposts' => 5, 'offset' => 0,
    1702                 'category' => 0, 'orderby' => 'post_date',
    1703                 'order' => 'DESC', 'include' => array(),
    1704                 'exclude' => array(), 'meta_key' => '',
    1705                 'meta_value' =>'', 'post_type' => 'post',
    1706                 'suppress_filters' => true
    1707         );
    1708 
    1709         $r = wp_parse_args( $args, $defaults );
    1710         if ( empty( $r['post_status'] ) )
    1711                 $r['post_status'] = ( 'attachment' == $r['post_type'] ) ? 'inherit' : 'publish';
    1712         if ( ! empty($r['numberposts']) && empty($r['posts_per_page']) )
    1713                 $r['posts_per_page'] = $r['numberposts'];
    1714         if ( ! empty($r['category']) )
    1715                 $r['cat'] = $r['category'];
    1716         if ( ! empty($r['include']) ) {
    1717                 $incposts = wp_parse_id_list( $r['include'] );
    1718                 $r['posts_per_page'] = count($incposts);  // only the number of posts included
    1719                 $r['post__in'] = $incposts;
    1720         } elseif ( ! empty($r['exclude']) )
    1721                 $r['post__not_in'] = wp_parse_id_list( $r['exclude'] );
    1722 
    1723         $r['ignore_sticky_posts'] = true;
    1724         $r['no_found_rows'] = true;
    1725 
    1726         $get_posts = new WP_Query;
    1727         return $get_posts->query($r);
    1728 
    1729 }
    1730 
    1731 //
    1732 // Post meta functions
    1733 //
    1734 
    1735 /**
    1736  * Add meta data field to a post.
    1737  *
    1738  * Post meta data is called "Custom Fields" on the Administration Screen.
    1739  *
    1740  * @since 1.5.0
    1741  * @uses $wpdb
    1742  * @link http://codex.wordpress.org/Function_Reference/add_post_meta
    1743  *
    1744  * @param int $post_id Post ID.
    1745  * @param string $meta_key Metadata name (expected slashed).
    1746  * @param mixed $meta_value Metadata value (expected slashed).
    1747  * @param bool $unique Optional, default is false. Whether the same key should not be added.
    1748  * @return bool False for failure. True for success.
    1749  */
    1750 function add_post_meta( $post_id, $meta_key, $meta_value, $unique = false ) {
    1751         //_deprecated_function( __FUNCTION__, '3.6', 'wp_add_post_meta() (expects unslashed data)' );
    1752 
    1753         // expected slashed
    1754         $meta_key = stripslashes( $meta_key );
    1755         $meta_value = stripslashes_deep( $meta_value );
    1756 
    1757         return wp_add_post_meta( $post_id, $meta_key, $meta_value, $unique );
    1758 }
    1759 
    1760 /**
    1761  * Add meta data field to a post.
    1762  *
    1763  * Post meta data is called "Custom Fields" on the Administration Screen.
    1764  *
    1765  * @since 3.6.0
    1766  * @link http://codex.wordpress.org/Function_Reference/wp_add_post_meta
    1767  *
    1768  * @param int $post_id Post ID.
    1769  * @param string $meta_key Metadata name (clean, slashes already stripped).
    1770  * @param mixed $meta_value Metadata value (clean, slashes already stripped).
    1771  * @param bool $unique Optional, default is false. Whether the same key should not be added.
    1772  * @return bool False for failure. True for success.
    1773  */
    1774 function wp_add_post_meta( $post_id, $meta_key, $meta_value, $unique = false ) {
    1775         // make sure meta is added to the post, not a revision
    1776         if ( $the_post = wp_is_post_revision( $post_id ) )
    1777                 $post_id = $the_post;
    1778 
    1779         return add_metadata( 'post', $post_id, $meta_key, $meta_value, $unique );
    1780 }
    1781 
    1782 /**
    1783  * Remove metadata matching criteria from a post.
    1784  *
    1785  * You can match based on the key, or key and value. Removing based on key and
    1786  * value, will keep from removing duplicate metadata with the same key. It also
    1787  * allows removing all metadata matching key, if needed.
    1788  *
    1789  * @since 1.5.0
    1790  * @uses $wpdb
    1791  * @link http://codex.wordpress.org/Function_Reference/delete_post_meta
    1792  *
    1793  * @param int $post_id post ID
    1794  * @param string $meta_key Metadata name.
    1795  * @param mixed $meta_value Optional. Metadata value.
    1796  * @return bool False for failure. True for success.
    1797  */
    1798 function delete_post_meta($post_id, $meta_key, $meta_value = '') {
    1799         // make sure meta is added to the post, not a revision
    1800         if ( $the_post = wp_is_post_revision($post_id) )
    1801                 $post_id = $the_post;
    1802 
    1803         return delete_metadata('post', $post_id, $meta_key, $meta_value);
    1804 }
    1805 
    1806 /**
    1807  * Retrieve post meta field for a post.
    1808  *
    1809  * @since 1.5.0
    1810  * @uses $wpdb
    1811  * @link http://codex.wordpress.org/Function_Reference/get_post_meta
    1812  *
    1813  * @param int $post_id Post ID.
    1814  * @param string $key Optional. The meta key to retrieve. By default, returns data for all keys.
    1815  * @param bool $single Whether to return a single value.
    1816  * @return mixed Will be an array if $single is false. Will be value of meta data field if $single
    1817  *  is true.
    1818  */
    1819 function get_post_meta($post_id, $key = '', $single = false) {
    1820         return get_metadata('post', $post_id, $key, $single);
    1821 }
    1822 
    1823 /**
    1824  * Update post meta field based on post ID.
    1825  *
    1826  * Use the $prev_value parameter to differentiate between meta fields with the
    1827  * same key and post ID.
    1828  *
    1829  * If the meta field for the post does not exist, it will be added.
    1830  *
    1831  * @since 1.5.0
    1832  * @uses $wpdb
    1833  * @link http://codex.wordpress.org/Function_Reference/update_post_meta
    1834  *
    1835  * @param int $post_id Post ID.
    1836  * @param string $meta_key Metadata key (expected slashed).
    1837  * @param mixed $meta_value Metadata value (expected slashed).
    1838  * @param mixed $prev_value Optional. Previous value to check before removing.
    1839  * @return bool False on failure, true if success.
    1840  */
    1841 function update_post_meta( $post_id, $meta_key, $meta_value, $prev_value = '' ) {
    1842         //_deprecated_function( __FUNCTION__, '3.6', 'wp_update_post_meta() (expects unslashed data)' );
    1843 
    1844         // expected slashed
    1845         $meta_key = stripslashes( $meta_key );
    1846         $meta_value = stripslashes_deep( $meta_value );
    1847 
    1848         return wp_update_post_meta( $post_id, $meta_key, $meta_value, $prev_value );
    1849 }
    1850 
    1851 /**
    1852  * Update post meta field based on post ID.
    1853  *
    1854  * Use the $prev_value parameter to differentiate between meta fields with the
    1855  * same key and post ID.
    1856  *
    1857  * If the meta field for the post does not exist, it will be added.
    1858  *
    1859  * @since 3.6.0
    1860  * @uses $wpdb
    1861  * @link http://codex.wordpress.org/Function_Reference/wp_update_post_meta
    1862  *
    1863  * @param int $post_id Post ID.
    1864  * @param string $meta_key Metadata key (clean, slashes already stripped).
    1865  * @param mixed $meta_value Metadata value (clean, slashes already stripped).
    1866  * @param mixed $prev_value Optional. Previous value to check before removing.
    1867  * @return bool False on failure, true if success.
    1868  */
    1869 function wp_update_post_meta( $post_id, $meta_key, $meta_value, $prev_value = '' ) {
    1870         // make sure meta is added to the post, not a revision
    1871         if ( $the_post = wp_is_post_revision( $post_id ) )
    1872                 $post_id = $the_post;
    1873 
    1874         return update_metadata( 'post', $post_id, $meta_key, $meta_value, $prev_value );
    1875 }
    1876 
    1877 /**
    1878  * Delete everything from post meta matching meta key.
    1879  *
    1880  * @since 2.3.0
    1881  * @uses $wpdb
    1882  *
    1883  * @param string $post_meta_key Key to search for when deleting.
    1884  * @return bool Whether the post meta key was deleted from the database
    1885  */
    1886 function delete_post_meta_by_key($post_meta_key) {
    1887         return delete_metadata( 'post', null, $post_meta_key, '', true );
    1888 }
    1889 
    1890 /**
    1891  * Retrieve post meta fields, based on post ID.
    1892  *
    1893  * The post meta fields are retrieved from the cache where possible,
    1894  * so the function is optimized to be called more than once.
    1895  *
    1896  * @since 1.2.0
    1897  * @link http://codex.wordpress.org/Function_Reference/get_post_custom
    1898  *
    1899  * @param int $post_id Post ID.
    1900  * @return array
    1901  */
    1902 function get_post_custom( $post_id = 0 ) {
    1903         $post_id = absint( $post_id );
    1904         if ( ! $post_id )
    1905                 $post_id = get_the_ID();
    1906 
    1907         return get_post_meta( $post_id );
    1908 }
    1909 
    1910 /**
    1911  * Retrieve meta field names for a post.
    1912  *
    1913  * If there are no meta fields, then nothing (null) will be returned.
    1914  *
    1915  * @since 1.2.0
    1916  * @link http://codex.wordpress.org/Function_Reference/get_post_custom_keys
    1917  *
    1918  * @param int $post_id post ID
    1919  * @return array|null Either array of the keys, or null if keys could not be retrieved.
    1920  */
    1921 function get_post_custom_keys( $post_id = 0 ) {
    1922         $custom = get_post_custom( $post_id );
    1923 
    1924         if ( !is_array($custom) )
    1925                 return;
    1926 
    1927         if ( $keys = array_keys($custom) )
    1928                 return $keys;
    1929 }
    1930 
    1931 /**
    1932  * Retrieve values for a custom post field.
    1933  *
    1934  * The parameters must not be considered optional. All of the post meta fields
    1935  * will be retrieved and only the meta field key values returned.
    1936  *
    1937  * @since 1.2.0
    1938  * @link http://codex.wordpress.org/Function_Reference/get_post_custom_values
    1939  *
    1940  * @param string $key Meta field key.
    1941  * @param int $post_id Post ID
    1942  * @return array Meta field values.
    1943  */
    1944 function get_post_custom_values( $key = '', $post_id = 0 ) {
    1945         if ( !$key )
    1946                 return null;
    1947 
    1948         $custom = get_post_custom($post_id);
    1949 
    1950         return isset($custom[$key]) ? $custom[$key] : null;
    1951 }
    1952 
    1953 /**
    1954  * Retrieve post format metadata for a post
    1955  *
    1956  * @since 3.6.0
    1957  *
    1958  * @param int $post_id
    1959  * @return null
    1960  */
    1961 function get_post_format_meta( $post_id = 0 ) {
    1962         $values = array(
    1963                 'quote'        => '',
    1964                 'quote_source' => '',
    1965                 'image'        => '',
    1966                 'url'          => '',
    1967                 'gallery'      => '',
    1968                 'media'        => '',
    1969         );
    1970 
    1971         foreach ( $values as $key => $value )
    1972                 $values[$key] = get_post_meta( $post_id, '_wp_format_' . $key, true );
    1973 
    1974         return $values;
    1975 }
    1976 
    1977 /**
    1978  * Check if post is sticky.
    1979  *
    1980  * Sticky posts should remain at the top of The Loop. If the post ID is not
    1981  * given, then The Loop ID for the current post will be used.
    1982  *
    1983  * @since 2.7.0
    1984  *
    1985  * @param int $post_id Optional. Post ID.
    1986  * @return bool Whether post is sticky.
    1987  */
    1988 function is_sticky( $post_id = 0 ) {
    1989         $post_id = absint( $post_id );
    1990 
    1991         if ( ! $post_id )
    1992                 $post_id = get_the_ID();
    1993 
    1994         $stickies = get_option( 'sticky_posts' );
    1995 
    1996         if ( ! is_array( $stickies ) )
    1997                 return false;
    1998 
    1999         if ( in_array( $post_id, $stickies ) )
    2000                 return true;
    2001 
    2002         return false;
    2003 }
    2004 
    2005 /**
    2006  * Sanitize every post field.
    2007  *
    2008  * If the context is 'raw', then the post object or array will get minimal santization of the int fields.
    2009  *
    2010  * @since 2.3.0
    2011  * @uses sanitize_post_field() Used to sanitize the fields.
    2012  *
    2013  * @param object|WP_Post|array $post The Post Object or Array
    2014  * @param string $context Optional, default is 'display'. How to sanitize post fields.
    2015  * @return object|WP_Post|array The now sanitized Post Object or Array (will be the same type as $post)
    2016  */
    2017 function sanitize_post($post, $context = 'display') {
    2018         if ( is_object($post) ) {
    2019                 // Check if post already filtered for this context
    2020                 if ( isset($post->filter) && $context == $post->filter )
    2021                         return $post;
    2022                 if ( !isset($post->ID) )
    2023                         $post->ID = 0;
    2024                 foreach ( array_keys(get_object_vars($post)) as $field )
    2025                         $post->$field = sanitize_post_field($field, $post->$field, $post->ID, $context);
    2026                 $post->filter = $context;
    2027         } else {
    2028                 // Check if post already filtered for this context
    2029                 if ( isset($post['filter']) && $context == $post['filter'] )
    2030                         return $post;
    2031                 if ( !isset($post['ID']) )
    2032                         $post['ID'] = 0;
    2033                 foreach ( array_keys($post) as $field )
    2034                         $post[$field] = sanitize_post_field($field, $post[$field], $post['ID'], $context);
    2035                 $post['filter'] = $context;
    2036         }
    2037         return $post;
    2038 }
    2039 
    2040 /**
    2041  * Sanitize post field based on context.
    2042  *
    2043  * Possible context values are:  'raw', 'edit', 'db', 'display', 'attribute' and 'js'. The
    2044  * 'display' context is used by default. 'attribute' and 'js' contexts are treated like 'display'
    2045  * when calling filters.
    2046  *
    2047  * @since 2.3.0
    2048  * @uses apply_filters() Calls 'edit_$field' and '{$field_no_prefix}_edit_pre' passing $value and
    2049  *  $post_id if $context == 'edit' and field name prefix == 'post_'.
    2050  *
    2051  * @uses apply_filters() Calls 'edit_post_$field' passing $value and $post_id if $context == 'db'.
    2052  * @uses apply_filters() Calls 'pre_$field' passing $value if $context == 'db' and field name prefix == 'post_'.
    2053  * @uses apply_filters() Calls '{$field}_pre' passing $value if $context == 'db' and field name prefix != 'post_'.
    2054  *
    2055  * @uses apply_filters() Calls '$field' passing $value, $post_id and $context if $context == anything
    2056  *  other than 'raw', 'edit' and 'db' and field name prefix == 'post_'.
    2057  * @uses apply_filters() Calls 'post_$field' passing $value if $context == anything other than 'raw',
    2058  *  'edit' and 'db' and field name prefix != 'post_'.
    2059  *
    2060  * @param string $field The Post Object field name.
    2061  * @param mixed $value The Post Object value.
    2062  * @param int $post_id Post ID.
    2063  * @param string $context How to sanitize post fields. Looks for 'raw', 'edit', 'db', 'display',
    2064  *               'attribute' and 'js'.
    2065  * @return mixed Sanitized value.
    2066  */
    2067 function sanitize_post_field($field, $value, $post_id, $context) {
    2068         $int_fields = array('ID', 'post_parent', 'menu_order', 'post_author', 'comment_count');
    2069         if ( in_array($field, $int_fields) )
    2070                 $value = (int) $value;
    2071 
    2072         // Fields which contain arrays of ints.
    2073         $array_int_fields = array( 'ancestors' );
    2074         if ( in_array($field, $array_int_fields) ) {
    2075                 $value = array_map( 'absint', $value);
    2076                 return $value;
    2077         }
    2078 
    2079         if ( 'raw' == $context )
    2080                 return $value;
    2081 
    2082         $prefixed = false;
    2083         if ( false !== strpos($field, 'post_') ) {
    2084                 $prefixed = true;
    2085                 $field_no_prefix = str_replace('post_', '', $field);
    2086         }
    2087 
    2088         if ( 'edit' == $context ) {
    2089                 $format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password');
    2090 
    2091                 if ( $prefixed ) {
    2092                         $value = apply_filters("edit_{$field}", $value, $post_id);
    2093                         // Old school
    2094                         $value = apply_filters("{$field_no_prefix}_edit_pre", $value, $post_id);
    2095                 } else {
    2096                         $value = apply_filters("edit_post_{$field}", $value, $post_id);
    2097                 }
    2098 
    2099                 if ( in_array($field, $format_to_edit) ) {
    2100                         if ( 'post_content' == $field )
    2101                                 $value = format_to_edit($value, user_can_richedit());
    2102                         else
    2103                                 $value = format_to_edit($value);
    2104                 } else {
    2105                         $value = esc_attr($value);
    2106                 }
    2107         } else if ( 'db' == $context ) {
    2108                 if ( $prefixed ) {
    2109                         $value = apply_filters("pre_{$field}", $value);
    2110                         $value = apply_filters("{$field_no_prefix}_save_pre", $value);
    2111                 } else {
    2112                         $value = apply_filters("pre_post_{$field}", $value);
    2113                         $value = apply_filters("{$field}_pre", $value);
    2114                 }
    2115         } else {
    2116                 // Use display filters by default.
    2117                 if ( $prefixed )
    2118                         $value = apply_filters($field, $value, $post_id, $context);
    2119                 else
    2120                         $value = apply_filters("post_{$field}", $value, $post_id, $context);
    2121         }
    2122 
    2123         if ( 'attribute' == $context )
    2124                 $value = esc_attr($value);
    2125         else if ( 'js' == $context )
    2126                 $value = esc_js($value);
    2127 
    2128         return $value;
    2129 }
    2130 
    2131 /**
    2132  * Make a post sticky.
    2133  *
    2134  * Sticky posts should be displayed at the top of the front page.
    2135  *
    2136  * @since 2.7.0
    2137  *
    2138  * @param int $post_id Post ID.
    2139  */
    2140 function stick_post($post_id) {
    2141         $stickies = get_option('sticky_posts');
    2142 
    2143         if ( !is_array($stickies) )
    2144                 $stickies = array($post_id);
    2145 
    2146         if ( ! in_array($post_id, $stickies) )
    2147                 $stickies[] = $post_id;
    2148 
    2149         update_option('sticky_posts', $stickies);
    2150 }
    2151 
    2152 /**
    2153  * Unstick a post.
    2154  *
    2155  * Sticky posts should be displayed at the top of the front page.
    2156  *
    2157  * @since 2.7.0
    2158  *
    2159  * @param int $post_id Post ID.
    2160  */
    2161 function unstick_post($post_id) {
    2162         $stickies = get_option('sticky_posts');
    2163 
    2164         if ( !is_array($stickies) )
    2165                 return;
    2166 
    2167         if ( ! in_array($post_id, $stickies) )
    2168                 return;
    2169 
    2170         $offset = array_search($post_id, $stickies);
    2171         if ( false === $offset )
    2172                 return;
    2173 
    2174         array_splice($stickies, $offset, 1);
    2175 
    2176         update_option('sticky_posts', $stickies);
    2177 }
    2178 
    2179 /**
    2180  * Count number of posts of a post type and is user has permissions to view.
    2181  *
    2182  * This function provides an efficient method of finding the amount of post's
    2183  * type a blog has. Another method is to count the amount of items in
    2184  * get_posts(), but that method has a lot of overhead with doing so. Therefore,
    2185  * when developing for 2.5+, use this function instead.
    2186  *
    2187  * The $perm parameter checks for 'readable' value and if the user can read
    2188  * private posts, it will display that for the user that is signed in.
    2189  *
    2190  * @since 2.5.0
    2191  * @link http://codex.wordpress.org/Template_Tags/wp_count_posts
    2192  *
    2193  * @param string $type Optional. Post type to retrieve count
    2194  * @param string $perm Optional. 'readable' or empty.
    2195  * @return object Number of posts for each status
    2196  */
    2197 function wp_count_posts( $type = 'post', $perm = '' ) {
    2198         global $wpdb;
    2199 
    2200         $user = wp_get_current_user();
    2201 
    2202         $cache_key = $type;
    2203 
    2204         $query = "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s";
    2205         if ( 'readable' == $perm && is_user_logged_in() ) {
    2206                 $post_type_object = get_post_type_object($type);
    2207                 if ( !current_user_can( $post_type_object->cap->read_private_posts ) ) {
    2208                         $cache_key .= '_' . $perm . '_' . $user->ID;
    2209                         $query .= " AND (post_status != 'private' OR ( post_author = '$user->ID' AND post_status = 'private' ))";
    2210                 }
    2211         }
    2212         $query .= ' GROUP BY post_status';
    2213 
    2214         $count = wp_cache_get($cache_key, 'counts');
    2215         if ( false !== $count )
    2216                 return $count;
    2217 
    2218         $count = $wpdb->get_results( $wpdb->prepare( $query, $type ), ARRAY_A );
    2219 
    2220         $stats = array();
    2221         foreach ( get_post_stati() as $state )
    2222                 $stats[$state] = 0;
    2223 
    2224         foreach ( (array) $count as $row )
    2225                 $stats[$row['post_status']] = $row['num_posts'];
    2226 
    2227         $stats = (object) $stats;
    2228         wp_cache_set($cache_key, $stats, 'counts');
    2229 
    2230         return $stats;
    2231 }
    2232 
    2233 /**
    2234  * Count number of attachments for the mime type(s).
    2235  *
    2236  * If you set the optional mime_type parameter, then an array will still be
    2237  * returned, but will only have the item you are looking for. It does not give
    2238  * you the number of attachments that are children of a post. You can get that
    2239  * by counting the number of children that post has.
    2240  *
    2241  * @since 2.5.0
    2242  *
    2243  * @param string|array $mime_type Optional. Array or comma-separated list of MIME patterns.
    2244  * @return array Number of posts for each mime type.
    2245  */
    2246 function wp_count_attachments( $mime_type = '' ) {
    2247         global $wpdb;
    2248 
    2249         $and = wp_post_mime_type_where( $mime_type );
    2250         $count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' $and GROUP BY post_mime_type", ARRAY_A );
    2251 
    2252         $stats = array();
    2253         foreach( (array) $count as $row ) {
    2254                 $stats[$row['post_mime_type']] = $row['num_posts'];
    2255         }
    2256         $stats['trash'] = $wpdb->get_var( "SELECT COUNT( * ) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status = 'trash' $and");
    2257 
    2258         return (object) $stats;
    2259 }
    2260 
    2261 /**
    2262  * Get default post mime types
    2263  *
    2264  * @since 2.9.0
    2265  *
    2266  * @return array
    2267  */
    2268 function get_post_mime_types() {
    2269         $post_mime_types = array(       //      array( adj, noun )
    2270                 'image' => array(__('Images'), __('Manage Images'), _n_noop('Image <span class="count">(%s)</span>', 'Images <span class="count">(%s)</span>')),
    2271                 'audio' => array(__('Audio'), __('Manage Audio'), _n_noop('Audio <span class="count">(%s)</span>', 'Audio <span class="count">(%s)</span>')),
    2272                 'video' => array(__('Video'), __('Manage Video'), _n_noop('Video <span class="count">(%s)</span>', 'Video <span class="count">(%s)</span>')),
    2273         );
    2274 
    2275         return apply_filters('post_mime_types', $post_mime_types);
    2276 }
    2277 
    2278 /**
    2279  * Check a MIME-Type against a list.
    2280  *
    2281  * If the wildcard_mime_types parameter is a string, it must be comma separated
    2282  * list. If the real_mime_types is a string, it is also comma separated to
    2283  * create the list.
    2284  *
    2285  * @since 2.5.0
    2286  *
    2287  * @param string|array $wildcard_mime_types e.g. audio/mpeg or image (same as image/*) or
    2288  *  flash (same as *flash*).
    2289  * @param string|array $real_mime_types post_mime_type values
    2290  * @return array array(wildcard=>array(real types))
    2291  */
    2292 function wp_match_mime_types($wildcard_mime_types, $real_mime_types) {
    2293         $matches = array();
    2294         if ( is_string($wildcard_mime_types) )
    2295                 $wildcard_mime_types = array_map('trim', explode(',', $wildcard_mime_types));
    2296         if ( is_string($real_mime_types) )
    2297                 $real_mime_types = array_map('trim', explode(',', $real_mime_types));
    2298         $wild = '[-._a-z0-9]*';
    2299         foreach ( (array) $wildcard_mime_types as $type ) {
    2300                 $type = str_replace('*', $wild, $type);
    2301                 $patternses[1][$type] = "^$type$";
    2302                 if ( false === strpos($type, '/') ) {
    2303                         $patternses[2][$type] = "^$type/";
    2304                         $patternses[3][$type] = $type;
    2305                 }
    2306         }
    2307         asort($patternses);
    2308         foreach ( $patternses as $patterns )
    2309                 foreach ( $patterns as $type => $pattern )
    2310                         foreach ( (array) $real_mime_types as $real )
    2311                                 if ( preg_match("#$pattern#", $real) && ( empty($matches[$type]) || false === array_search($real, $matches[$type]) ) )
    2312                                         $matches[$type][] = $real;
    2313         return $matches;
    2314 }
    2315 
    2316 /**
    2317  * Convert MIME types into SQL.
    2318  *
    2319  * @since 2.5.0
    2320  *
    2321  * @param string|array $post_mime_types List of mime types or comma separated string of mime types.
    2322  * @param string $table_alias Optional. Specify a table alias, if needed.
    2323  * @return string The SQL AND clause for mime searching.
    2324  */
    2325 function wp_post_mime_type_where($post_mime_types, $table_alias = '') {
    2326         $where = '';
    2327         $wildcards = array('', '%', '%/%');
    2328         if ( is_string($post_mime_types) )
    2329                 $post_mime_types = array_map('trim', explode(',', $post_mime_types));
    2330         foreach ( (array) $post_mime_types as $mime_type ) {
    2331                 $mime_type = preg_replace('/\s/', '', $mime_type);
    2332                 $slashpos = strpos($mime_type, '/');
    2333                 if ( false !== $slashpos ) {
    2334                         $mime_group = preg_replace('/[^-*.a-zA-Z0-9]/', '', substr($mime_type, 0, $slashpos));
    2335                         $mime_subgroup = preg_replace('/[^-*.+a-zA-Z0-9]/', '', substr($mime_type, $slashpos + 1));
    2336                         if ( empty($mime_subgroup) )
    2337                                 $mime_subgroup = '*';
    2338                         else
    2339                                 $mime_subgroup = str_replace('/', '', $mime_subgroup);
    2340                         $mime_pattern = "$mime_group/$mime_subgroup";
    2341                 } else {
    2342                         $mime_pattern = preg_replace('/[^-*.a-zA-Z0-9]/', '', $mime_type);
    2343                         if ( false === strpos($mime_pattern, '*') )
    2344                                 $mime_pattern .= '/*';
    2345                 }
    2346 
    2347                 $mime_pattern = preg_replace('/\*+/', '%', $mime_pattern);
    2348 
    2349                 if ( in_array( $mime_type, $wildcards ) )
    2350                         return '';
    2351 
    2352                 if ( false !== strpos($mime_pattern, '%') )
    2353                         $wheres[] = empty($table_alias) ? "post_mime_type LIKE '$mime_pattern'" : "$table_alias.post_mime_type LIKE '$mime_pattern'";
    2354                 else
    2355                         $wheres[] = empty($table_alias) ? "post_mime_type = '$mime_pattern'" : "$table_alias.post_mime_type = '$mime_pattern'";
    2356         }
    2357         if ( !empty($wheres) )
    2358                 $where = ' AND (' . join(' OR ', $wheres) . ') ';
    2359         return $where;
    2360 }
    2361 
    2362 /**
    2363  * Trashes or deletes a post or page.
    2364  *
    2365  * When the post and page is permanently deleted, everything that is tied to it is deleted also.
    2366  * This includes comments, post meta fields, and terms associated with the post.
    2367  *
    2368  * The post or page is moved to trash instead of permanently deleted unless trash is
    2369  * disabled, item is already in the trash, or $force_delete is true.
    2370  *
    2371  * @since 1.0.0
    2372  * @uses do_action() on 'delete_post' before deletion unless post type is 'attachment'.
    2373  * @uses do_action() on 'deleted_post' after deletion unless post type is 'attachment'.
    2374  * @uses wp_delete_attachment() if post type is 'attachment'.
    2375  * @uses wp_trash_post() if item should be trashed.
    2376  *
    2377  * @param int $postid Post ID.
    2378  * @param bool $force_delete Whether to bypass trash and force deletion. Defaults to false.
    2379  * @return mixed False on failure
    2380  */
    2381 function wp_delete_post( $postid = 0, $force_delete = false ) {
    2382         global $wpdb;
    2383 
    2384         if ( !$post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
    2385                 return $post;
    2386 
    2387         if ( !$force_delete && ( $post->post_type == 'post' || $post->post_type == 'page') && get_post_status( $postid ) != 'trash' && EMPTY_TRASH_DAYS )
    2388                         return wp_trash_post($postid);
    2389 
    2390         if ( $post->post_type == 'attachment' )
    2391                 return wp_delete_attachment( $postid, $force_delete );
    2392 
    2393         do_action('before_delete_post', $postid);
    2394 
    2395         delete_post_meta($postid,'_wp_trash_meta_status');
    2396         delete_post_meta($postid,'_wp_trash_meta_time');
    2397 
    2398         wp_delete_object_term_relationships($postid, get_object_taxonomies($post->post_type));
    2399 
    2400         $parent_data = array( 'post_parent' => $post->post_parent );
    2401         $parent_where = array( 'post_parent' => $postid );
    2402 
    2403         if ( is_post_type_hierarchical( $post->post_type ) ) {
    2404                 // Point children of this page to its parent, also clean the cache of affected children
    2405                 $children_query = $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE post_parent = %d AND post_type = %s", $postid, $post->post_type );
    2406                 $children = $wpdb->get_results( $children_query );
    2407 
    2408                 $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => $post->post_type ) );
    2409         }
    2410 
    2411         if ( 'page' == $post->post_type) {
    2412                 // if the page is defined in option page_on_front or post_for_posts,
    2413                 // adjust the corresponding options
    2414                 if ( get_option('page_on_front') == $postid ) {
    2415                         update_option('show_on_front', 'posts');
    2416                         delete_option('page_on_front');
    2417                 }
    2418                 if ( get_option('page_for_posts') == $postid ) {
    2419                         delete_option('page_for_posts');
    2420                 }
    2421         } else {
    2422                 unstick_post($postid);
    2423         }
    2424 
    2425         // Do raw query. wp_get_post_revisions() is filtered
    2426         $revision_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_parent = %d AND post_type = 'revision'", $postid ) );
    2427         // Use wp_delete_post (via wp_delete_post_revision) again. Ensures any meta/misplaced data gets cleaned up.
    2428         foreach ( $revision_ids as $revision_id )
    2429                 wp_delete_post_revision( $revision_id );
    2430 
    2431         // Point all attachments to this post up one level
    2432         $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'attachment' ) );
    2433 
    2434         $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
    2435         foreach ( $comment_ids as $comment_id )
    2436                 wp_delete_comment( $comment_id, true );
    2437 
    2438         $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid ));
    2439         foreach ( $post_meta_ids as $mid )
    2440                 delete_metadata_by_mid( 'post', $mid );
    2441 
    2442         do_action( 'delete_post', $postid );
    2443         $wpdb->delete( $wpdb->posts, array( 'ID' => $postid ) );
    2444         do_action( 'deleted_post', $postid );
    2445 
    2446         clean_post_cache( $post );
    2447 
    2448         if ( is_post_type_hierarchical( $post->post_type ) && $children ) {
    2449                 foreach ( $children as $child )
    2450                         clean_post_cache( $child );
    2451         }
    2452 
    2453         wp_clear_scheduled_hook('publish_future_post', array( $postid ) );
    2454 
    2455         do_action('after_delete_post', $postid);
    2456 
    2457         return $post;
    2458 }
    2459 
    2460 /**
    2461  * Moves a post or page to the Trash
    2462  *
    2463  * If trash is disabled, the post or page is permanently deleted.
    2464  *
    2465  * @since 2.9.0
    2466  * @uses do_action() on 'trash_post' before trashing
    2467  * @uses do_action() on 'trashed_post' after trashing
    2468  * @uses wp_delete_post() if trash is disabled
    2469  *
    2470  * @param int $post_id Post ID.
    2471  * @return mixed False on failure
    2472  */
    2473 function wp_trash_post($post_id = 0) {
    2474         if ( !EMPTY_TRASH_DAYS )
    2475                 return wp_delete_post($post_id, true);
    2476 
    2477         if ( !$post = get_post($post_id, ARRAY_A) )
    2478                 return $post;
    2479 
    2480         if ( $post['post_status'] == 'trash' )
    2481                 return false;
    2482 
    2483         do_action('wp_trash_post', $post_id);
    2484 
    2485         wp_add_post_meta($post_id,'_wp_trash_meta_status', $post['post_status']);
    2486         wp_add_post_meta($post_id,'_wp_trash_meta_time', time());
    2487 
    2488         $post['post_status'] = 'trash';
    2489         wp_insert_post($post);
    2490 
    2491         wp_trash_post_comments($post_id);
    2492 
    2493         do_action('trashed_post', $post_id);
    2494 
    2495         return $post;
    2496 }
    2497 
    2498 /**
    2499  * Restores a post or page from the Trash
    2500  *
    2501  * @since 2.9.0
    2502  * @uses do_action() on 'untrash_post' before undeletion
    2503  * @uses do_action() on 'untrashed_post' after undeletion
    2504  *
    2505  * @param int $post_id Post ID.
    2506  * @return mixed False on failure
    2507  */
    2508 function wp_untrash_post($post_id = 0) {
    2509         if ( !$post = get_post($post_id, ARRAY_A) )
    2510                 return $post;
    2511 
    2512         if ( $post['post_status'] != 'trash' )
    2513                 return false;
    2514 
    2515         do_action('untrash_post', $post_id);
    2516 
    2517         $post_status = get_post_meta($post_id, '_wp_trash_meta_status', true);
    2518 
    2519         $post['post_status'] = $post_status;
    2520 
    2521         delete_post_meta($post_id, '_wp_trash_meta_status');
    2522         delete_post_meta($post_id, '_wp_trash_meta_time');
    2523 
    2524         wp_insert_post($post);
    2525 
    2526         wp_untrash_post_comments($post_id);
    2527 
    2528         do_action('untrashed_post', $post_id);
    2529 
    2530         return $post;
    2531 }
    2532 
    2533 /**
    2534  * Moves comments for a post to the trash
    2535  *
    2536  * @since 2.9.0
    2537  * @uses do_action() on 'trash_post_comments' before trashing
    2538  * @uses do_action() on 'trashed_post_comments' after trashing
    2539  *
    2540  * @param int $post Post ID or object.
    2541  * @return mixed False on failure
    2542  */
    2543 function wp_trash_post_comments($post = null) {
    2544         global $wpdb;
    2545 
    2546         $post = get_post($post);
    2547         if ( empty($post) )
    2548                 return;
    2549 
    2550         $post_id = $post->ID;
    2551 
    2552         do_action('trash_post_comments', $post_id);
    2553 
    2554         $comments = $wpdb->get_results( $wpdb->prepare("SELECT comment_ID, comment_approved FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id) );
    2555         if ( empty($comments) )
    2556                 return;
    2557 
    2558         // Cache current status for each comment
    2559         $statuses = array();
    2560         foreach ( $comments as $comment )
    2561                 $statuses[$comment->comment_ID] = $comment->comment_approved;
    2562         wp_add_post_meta($post_id, '_wp_trash_meta_comments_status', $statuses);
    2563 
    2564         // Set status for all comments to post-trashed
    2565         $result = $wpdb->update($wpdb->comments, array('comment_approved' => 'post-trashed'), array('comment_post_ID' => $post_id));
    2566 
    2567         clean_comment_cache( array_keys($statuses) );
    2568 
    2569         do_action('trashed_post_comments', $post_id, $statuses);
    2570 
    2571         return $result;
    2572 }
    2573 
    2574 /**
    2575  * Restore comments for a post from the trash
    2576  *
    2577  * @since 2.9.0
    2578  * @uses do_action() on 'untrash_post_comments' before trashing
    2579  * @uses do_action() on 'untrashed_post_comments' after trashing
    2580  *
    2581  * @param int $post Post ID or object.
    2582  * @return mixed False on failure
    2583  */
    2584 function wp_untrash_post_comments($post = null) {
    2585         global $wpdb;
    2586 
    2587         $post = get_post($post);
    2588         if ( empty($post) )
    2589                 return;
    2590 
    2591         $post_id = $post->ID;
    2592 
    2593         $statuses = get_post_meta($post_id, '_wp_trash_meta_comments_status', true);
    2594 
    2595         if ( empty($statuses) )
    2596                 return true;
    2597 
    2598         do_action('untrash_post_comments', $post_id);
    2599 
    2600         // Restore each comment to its original status
    2601         $group_by_status = array();
    2602         foreach ( $statuses as $comment_id => $comment_status )
    2603                 $group_by_status[$comment_status][] = $comment_id;
    2604 
    2605         foreach ( $group_by_status as $status => $comments ) {
    2606                 // Sanity check. This shouldn't happen.
    2607                 if ( 'post-trashed' == $status )
    2608                         $status = '0';
    2609                 $comments_in = implode( "', '", $comments );
    2610                 $wpdb->query( "UPDATE $wpdb->comments SET comment_approved = '$status' WHERE comment_ID IN ('" . $comments_in . "')" );
    2611         }
    2612 
    2613         clean_comment_cache( array_keys($statuses) );
    2614 
    2615         delete_post_meta($post_id, '_wp_trash_meta_comments_status');
    2616 
    2617         do_action('untrashed_post_comments', $post_id);
    2618 }
    2619 
    2620 /**
    2621  * Retrieve the list of categories for a post.
    2622  *
    2623  * Compatibility layer for themes and plugins. Also an easy layer of abstraction
    2624  * away from the complexity of the taxonomy layer.
    2625  *
    2626  * @since 2.1.0
    2627  *
    2628  * @uses wp_get_object_terms() Retrieves the categories. Args details can be found here.
    2629  *
    2630  * @param int $post_id Optional. The Post ID.
    2631  * @param array $args Optional. Overwrite the defaults.
    2632  * @return array
    2633  */
    2634 function wp_get_post_categories( $post_id = 0, $args = array() ) {
    2635         $post_id = (int) $post_id;
    2636 
    2637         $defaults = array('fields' => 'ids');
    2638         $args = wp_parse_args( $args, $defaults );
    2639 
    2640         $cats = wp_get_object_terms($post_id, 'category', $args);
    2641         return $cats;
    2642 }
    2643 
    2644 /**
    2645  * Retrieve the tags for a post.
    2646  *
    2647  * There is only one default for this function, called 'fields' and by default
    2648  * is set to 'all'. There are other defaults that can be overridden in
    2649  * {@link wp_get_object_terms()}.
    2650  *
    2651  * @package WordPress
    2652  * @subpackage Post
    2653  * @since 2.3.0
    2654  *
    2655  * @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
    2656  *
    2657  * @param int $post_id Optional. The Post ID
    2658  * @param array $args Optional. Overwrite the defaults
    2659  * @return array List of post tags.
    2660  */
    2661 function wp_get_post_tags( $post_id = 0, $args = array() ) {
    2662         return wp_get_post_terms( $post_id, 'post_tag', $args);
    2663 }
    2664 
    2665 /**
    2666  * Retrieve the terms for a post.
    2667  *
    2668  * There is only one default for this function, called 'fields' and by default
    2669  * is set to 'all'. There are other defaults that can be overridden in
    2670  * {@link wp_get_object_terms()}.
    2671  *
    2672  * @package WordPress
    2673  * @subpackage Post
    2674  * @since 2.8.0
    2675  *
    2676  * @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
    2677  *
    2678  * @param int $post_id Optional. The Post ID
    2679  * @param string $taxonomy The taxonomy for which to retrieve terms. Defaults to post_tag.
    2680  * @param array $args Optional. Overwrite the defaults
    2681  * @return array List of post tags.
    2682  */
    2683 function wp_get_post_terms( $post_id = 0, $taxonomy = 'post_tag', $args = array() ) {
    2684         $post_id = (int) $post_id;
    2685 
    2686         $defaults = array('fields' => 'all');
    2687         $args = wp_parse_args( $args, $defaults );
    2688 
    2689         $tags = wp_get_object_terms($post_id, $taxonomy, $args);
    2690 
    2691         return $tags;
    2692 }
    2693 
    2694 /**
    2695  * Retrieve number of recent posts.
    2696  *
    2697  * @since 1.0.0
    2698  * @uses wp_parse_args()
    2699  * @uses get_posts()
    2700  *
    2701  * @param string $deprecated Deprecated.
    2702  * @param array $args Optional. Overrides defaults.
    2703  * @param string $output Optional.
    2704  * @return unknown.
    2705  */
    2706 function wp_get_recent_posts( $args = array(), $output = ARRAY_A ) {
    2707 
    2708         if ( is_numeric( $args ) ) {
    2709                 _deprecated_argument( __FUNCTION__, '3.1', __( 'Passing an integer number of posts is deprecated. Pass an array of arguments instead.' ) );
    2710                 $args = array( 'numberposts' => absint( $args ) );
    2711         }
    2712 
    2713         // Set default arguments
    2714         $defaults = array(
    2715                 'numberposts' => 10, 'offset' => 0,
    2716                 'category' => 0, 'orderby' => 'post_date',
    2717                 'order' => 'DESC', 'include' => '',
    2718                 'exclude' => '', 'meta_key' => '',
    2719                 'meta_value' =>'', 'post_type' => 'post', 'post_status' => 'draft, publish, future, pending, private',
    2720                 'suppress_filters' => true
    2721         );
    2722 
    2723         $r = wp_parse_args( $args, $defaults );
    2724 
    2725         $results = get_posts( $r );
    2726 
    2727         // Backward compatibility. Prior to 3.1 expected posts to be returned in array
    2728         if ( ARRAY_A == $output ){
    2729                 foreach( $results as $key => $result ) {
    2730                         $results[$key] = get_object_vars( $result );
    2731                 }
    2732                 return $results ? $results : array();
    2733         }
    2734 
    2735         return $results ? $results : false;
    2736 
    2737 }
    2738 
    2739 /**
    2740  * Insert a post.
    2741  *
    2742  * If the $postarr parameter has 'ID' set to a value, then post will be updated.
    2743  *
    2744  * You can set the post date manually, by setting the values for 'post_date'
    2745  * and 'post_date_gmt' keys. You can close the comments or open the comments by
    2746  * setting the value for 'comment_status' key.
    2747  *
    2748  * The defaults for the parameter $postarr are:
    2749  *     'post_status'   - Default is 'draft'.
    2750  *     'post_type'     - Default is 'post'.
    2751  *     'post_author'   - Default is current user ID ($user_ID). The ID of the user who added the post.
    2752  *     'ping_status'   - Default is the value in 'default_ping_status' option.
    2753  *                       Whether the attachment can accept pings.
    2754  *     'post_parent'   - Default is 0. Set this for the post it belongs to, if any.
    2755  *     'menu_order'    - Default is 0. The order it is displayed.
    2756  *     'to_ping'       - Whether to ping.
    2757  *     'pinged'        - Default is empty string.
    2758  *     'post_password' - Default is empty string. The password to access the attachment.
    2759  *     'guid'          - Global Unique ID for referencing the attachment.
    2760  *     'post_content_filtered' - Post content filtered.
    2761  *     'post_excerpt'  - Post excerpt.
    2762  *
    2763  * @since 1.0.0
    2764  * @uses $wpdb
    2765  * @uses $user_ID
    2766  * @uses do_action() Calls 'pre_post_update' on post ID if this is an update.
    2767  * @uses do_action() Calls 'edit_post' action on post ID and post data if this is an update.
    2768  * @uses do_action() Calls 'save_post' and 'wp_insert_post' on post id and post data just before returning.
    2769  * @uses apply_filters() Calls 'wp_insert_post_data' passing $data, $postarr prior to database update or insert.
    2770  * @uses wp_transition_post_status()
    2771  *
    2772  * @param array $postarr Elements that make up post to insert.
    2773  * @param bool $wp_error Optional. Allow return of WP_Error on failure.
    2774  * @return int|WP_Error The value 0 or WP_Error on failure. The post ID on success.
    2775  */
    2776 function wp_insert_post($postarr, $wp_error = false) {
    2777         global $wpdb, $user_ID;
    2778 
    2779         $defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
    2780                 'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
    2781                 'menu_order' => 0, 'to_ping' =>  '', 'pinged' => '', 'post_password' => '',
    2782                 'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0,
    2783                 'post_content' => '', 'post_title' => '');
    2784 
    2785         $postarr = wp_parse_args($postarr, $defaults);
    2786 
    2787         unset( $postarr[ 'filter' ] );
    2788 
    2789         $postarr = sanitize_post($postarr, 'db');
    2790 
    2791         // export array as variables
    2792         extract($postarr, EXTR_SKIP);
    2793 
    2794         // Are we updating or creating?
    2795         $update = false;
    2796         if ( !empty($ID) ) {
    2797                 $update = true;
    2798                 $previous_status = get_post_field('post_status', $ID);
    2799         } else {
    2800                 $previous_status = 'new';
    2801         }
    2802 
    2803         $maybe_empty = ! $post_content && ! $post_title && ! $post_excerpt && post_type_supports( $post_type, 'editor' )
    2804                 && post_type_supports( $post_type, 'title' ) && post_type_supports( $post_type, 'excerpt' );
    2805         if ( apply_filters( 'wp_insert_post_empty_content', $maybe_empty, $postarr ) ) {
    2806                 if ( $wp_error )
    2807                         return new WP_Error( 'empty_content', __( 'Content, title, and excerpt are empty.' ) );
    2808                 else
    2809                         return 0;
    2810         }
    2811 
    2812         if ( empty($post_type) )
    2813                 $post_type = 'post';
    2814 
    2815         if ( empty($post_status) )
    2816                 $post_status = 'draft';
    2817 
    2818         if ( !empty($post_category) )
    2819                 $post_category = array_filter($post_category); // Filter out empty terms
    2820 
    2821         // Make sure we set a valid category.
    2822         if ( empty($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
    2823                 // 'post' requires at least one category.
    2824                 if ( 'post' == $post_type && 'auto-draft' != $post_status )
    2825                         $post_category = array( get_option('default_category') );
    2826                 else
    2827                         $post_category = array();
    2828         }
    2829 
    2830         if ( empty($post_author) )
    2831                 $post_author = $user_ID;
    2832 
    2833         $post_ID = 0;
    2834 
    2835         // Get the post ID and GUID
    2836         if ( $update ) {
    2837                 $post_ID = (int) $ID;
    2838                 $guid = get_post_field( 'guid', $post_ID );
    2839                 $post_before = get_post($post_ID);
    2840         }
    2841 
    2842         // Don't allow contributors to set the post slug for pending review posts
    2843         if ( 'pending' == $post_status && !current_user_can( 'publish_posts' ) )
    2844                 $post_name = '';
    2845 
    2846         // Create a valid post name. Drafts and pending posts are allowed to have an empty
    2847         // post name.
    2848         if ( empty($post_name) ) {
    2849                 if ( !in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
    2850                         $post_name = sanitize_title($post_title);
    2851                 else
    2852                         $post_name = '';
    2853         } else {
    2854                 // On updates, we need to check to see if it's using the old, fixed sanitization context.
    2855                 $check_name = sanitize_title( $post_name, '', 'old-save' );
    2856                 if ( $update && strtolower( urlencode( $post_name ) ) == $check_name && get_post_field( 'post_name', $ID ) == $check_name )
    2857                         $post_name = $check_name;
    2858                 else // new post, or slug has changed.
    2859                         $post_name = sanitize_title($post_name);
    2860         }
    2861 
    2862         // If the post date is empty (due to having been new or a draft) and status is not 'draft' or 'pending', set date to now
    2863         if ( empty($post_date) || '0000-00-00 00:00:00' == $post_date )
    2864                 $post_date = current_time('mysql');
    2865 
    2866                 // validate the date
    2867                 $mm = substr( $post_date, 5, 2 );
    2868                 $jj = substr( $post_date, 8, 2 );
    2869                 $aa = substr( $post_date, 0, 4 );
    2870                 $valid_date = wp_checkdate( $mm, $jj, $aa, $post_date );
    2871                 if ( !$valid_date ) {
    2872                         if ( $wp_error )
    2873                                 return new WP_Error( 'invalid_date', __( 'Whoops, the provided date is invalid.' ) );
    2874                         else
    2875                                 return 0;
    2876                 }
    2877 
    2878         if ( empty($post_date_gmt) || '0000-00-00 00:00:00' == $post_date_gmt ) {
    2879                 if ( !in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
    2880                         $post_date_gmt = get_gmt_from_date($post_date);
    2881                 else
    2882                         $post_date_gmt = '0000-00-00 00:00:00';
    2883         }
    2884 
    2885         if ( $update || '0000-00-00 00:00:00' == $post_date ) {
    2886                 $post_modified     = current_time( 'mysql' );
    2887                 $post_modified_gmt = current_time( 'mysql', 1 );
    2888         } else {
    2889                 $post_modified     = $post_date;
    2890                 $post_modified_gmt = $post_date_gmt;
    2891         }
    2892 
    2893         if ( 'publish' == $post_status ) {
    2894                 $now = gmdate('Y-m-d H:i:59');
    2895                 if ( mysql2date('U', $post_date_gmt, false) > mysql2date('U', $now, false) )
    2896                         $post_status = 'future';
    2897         } elseif( 'future' == $post_status ) {
    2898                 $now = gmdate('Y-m-d H:i:59');
    2899                 if ( mysql2date('U', $post_date_gmt, false) <= mysql2date('U', $now, false) )
    2900                         $post_status = 'publish';
    2901         }
    2902 
    2903         if ( empty($comment_status) ) {
    2904                 if ( $update )
    2905                         $comment_status = 'closed';
    2906                 else
    2907                         $comment_status = get_option('default_comment_status');
    2908         }
    2909         if ( empty($ping_status) )
    2910                 $ping_status = get_option('default_ping_status');
    2911 
    2912         if ( isset($to_ping) )
    2913                 $to_ping = sanitize_trackback_urls( $to_ping );
    2914         else
    2915                 $to_ping = '';
    2916 
    2917         if ( ! isset($pinged) )
    2918                 $pinged = '';
    2919 
    2920         if ( isset($post_parent) )
    2921                 $post_parent = (int) $post_parent;
    2922         else
    2923                 $post_parent = 0;
    2924 
    2925         // Check the post_parent to see if it will cause a hierarchy loop
    2926         $post_parent = apply_filters( 'wp_insert_post_parent', $post_parent, $post_ID, compact( array_keys( $postarr ) ), $postarr );
    2927 
    2928         if ( isset($menu_order) )
    2929                 $menu_order = (int) $menu_order;
    2930         else
    2931                 $menu_order = 0;
    2932 
    2933         if ( !isset($post_password) || 'private' == $post_status )
    2934                 $post_password = '';
    2935 
    2936         $post_name = wp_unique_post_slug($post_name, $post_ID, $post_status, $post_type, $post_parent);
    2937 
    2938         $data = compact( array( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_content_filtered', 'post_title', 'post_excerpt', 'post_status', 'post_type', 'comment_status', 'ping_status', 'post_password', 'post_name', 'to_ping', 'pinged', 'post_modified', 'post_modified_gmt', 'post_parent', 'menu_order', 'guid' ) );
    2939         $data = apply_filters('wp_insert_post_data', $data, $postarr);
    2940         $where = array( 'ID' => $post_ID );
    2941 
    2942         if ( $update ) {
    2943                 do_action( 'pre_post_update', $post_ID, $data );
    2944                 if ( false === $wpdb->update( $wpdb->posts, $data, $where ) ) {
    2945                         if ( $wp_error )
    2946                                 return new WP_Error('db_update_error', __('Could not update post in the database'), $wpdb->last_error);
    2947                         else
    2948                                 return 0;
    2949                 }
    2950         } else {
    2951                 if ( isset($post_mime_type) )
    2952                         $data['post_mime_type'] = $post_mime_type; // This isn't in the update
    2953                 // If there is a suggested ID, use it if not already present
    2954                 if ( !empty($import_id) ) {
    2955                         $import_id = (int) $import_id;
    2956                         if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
    2957                                 $data['ID'] = $import_id;
    2958                         }
    2959                 }
    2960                 if ( false === $wpdb->insert( $wpdb->posts, $data ) ) {
    2961                         if ( $wp_error )
    2962                                 return new WP_Error('db_insert_error', __('Could not insert post into the database'), $wpdb->last_error);
    2963                         else
    2964                                 return 0;
    2965                 }
    2966                 $post_ID = (int) $wpdb->insert_id;
    2967 
    2968                 // use the newly generated $post_ID
    2969                 $where = array( 'ID' => $post_ID );
    2970         }
    2971 
    2972         if ( empty($data['post_name']) && !in_array( $data['post_status'], array( 'draft', 'pending', 'auto-draft' ) ) ) {
    2973                 $data['post_name'] = sanitize_title($data['post_title'], $post_ID);
    2974                 $wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
    2975         }
    2976 
    2977         if ( is_object_in_taxonomy($post_type, 'category') )
    2978                 wp_set_post_categories( $post_ID, $post_category );
    2979 
    2980         if ( isset( $tags_input ) && is_object_in_taxonomy($post_type, 'post_tag') )
    2981                 wp_set_post_tags( $post_ID, $tags_input );
    2982 
    2983         // new-style support for all custom taxonomies
    2984         if ( !empty($tax_input) ) {
    2985                 foreach ( $tax_input as $taxonomy => $tags ) {
    2986                         $taxonomy_obj = get_taxonomy($taxonomy);
    2987                         if ( is_array($tags) ) // array = hierarchical, string = non-hierarchical.
    2988                                 $tags = array_filter($tags);
    2989                         if ( current_user_can($taxonomy_obj->cap->assign_terms) )
    2990                                 wp_set_post_terms( $post_ID, $tags, $taxonomy );
    2991                 }
    2992         }
    2993 
    2994         $current_guid = get_post_field( 'guid', $post_ID );
    2995 
    2996         // Set GUID
    2997         if ( !$update && '' == $current_guid )
    2998                 $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post_ID ) ), $where );
    2999 
    3000         clean_post_cache( $post_ID );
    3001 
    3002         $post = get_post($post_ID);
    3003 
    3004         if ( !empty($page_template) && 'page' == $data['post_type'] ) {
    3005                 $post->page_template = $page_template;
    3006                 $page_templates = wp_get_theme()->get_page_templates();
    3007                 if ( 'default' != $page_template && ! isset( $page_templates[ $page_template ] ) ) {
    3008                         if ( $wp_error )
    3009                                 return new WP_Error('invalid_page_template', __('The page template is invalid.'));
    3010                         else
    3011                                 return 0;
    3012                 }
    3013                 wp_update_post_meta($post_ID, '_wp_page_template',  $page_template);
    3014         }
    3015 
    3016         wp_transition_post_status($data['post_status'], $previous_status, $post);
    3017 
    3018         if ( $update ) {
    3019                 do_action('edit_post', $post_ID, $post);
    3020                 $post_after = get_post($post_ID);
    3021                 do_action( 'post_updated', $post_ID, $post_after, $post_before);
    3022         }
    3023 
    3024         do_action('save_post', $post_ID, $post);
    3025         do_action('wp_insert_post', $post_ID, $post);
    3026 
    3027         return $post_ID;
    3028 }
    3029 
    3030 /**
    3031  * Update a post with new post data.
    3032  *
    3033  * The date does not have to be set for drafts. You can set the date and it will
    3034  * not be overridden.
    3035  *
    3036  * @since 1.0.0
    3037  *
    3038  * @param array|object $postarr Post data. Arrays are expected to be escaped, objects are not.
    3039  * @param bool $wp_error Optional. Allow return of WP_Error on failure.
    3040  * @return int|WP_Error The value 0 or WP_Error on failure. The post ID on success.
    3041  */
    3042 function wp_update_post( $postarr = array(), $wp_error = false ) {
    3043         if ( is_object($postarr) ) {
    3044                 // non-escaped post was passed
    3045                 $postarr = get_object_vars($postarr);
    3046         }
    3047 
    3048         // First, get all of the original fields
    3049         $post = get_post($postarr['ID'], ARRAY_A);
    3050 
    3051         // Passed post category list overwrites existing category list if not empty.
    3052         if ( isset($postarr['post_category']) && is_array($postarr['post_category'])
    3053                          && 0 != count($postarr['post_category']) )
    3054                 $post_cats = $postarr['post_category'];
    3055         else
    3056                 $post_cats = $post['post_category'];
    3057 
    3058         // Drafts shouldn't be assigned a date unless explicitly done so by the user
    3059         if ( isset( $post['post_status'] ) && in_array($post['post_status'], array('draft', 'pending', 'auto-draft')) && empty($postarr['edit_date']) &&
    3060                          ('0000-00-00 00:00:00' == $post['post_date_gmt']) )
    3061                 $clear_date = true;
    3062         else
    3063                 $clear_date = false;
    3064 
    3065         // Merge old and new fields with new fields overwriting old ones.
    3066         $postarr = array_merge($post, $postarr);
    3067         $postarr['post_category'] = $post_cats;
    3068         if ( $clear_date ) {
    3069                 $postarr['post_date'] = current_time('mysql');
    3070                 $postarr['post_date_gmt'] = '';
    3071         }
    3072 
    3073         if ($postarr['post_type'] == 'attachment')
    3074                 return wp_insert_attachment($postarr);
    3075 
    3076         return wp_insert_post( $postarr, $wp_error );
    3077 }
    3078 
    3079 /**
    3080  * Publish a post by transitioning the post status.
    3081  *
    3082  * @since 2.1.0
    3083  * @uses $wpdb
    3084  * @uses do_action() Calls 'edit_post', 'save_post', and 'wp_insert_post' on post_id and post data.
    3085  *
    3086  * @param mixed $post Post ID or object.
    3087  */
    3088 function wp_publish_post( $post ) {
    3089         global $wpdb;
    3090 
    3091         if ( ! $post = get_post( $post ) )
    3092                 return;
    3093 
    3094         if ( 'publish' == $post->post_status )
    3095                 return;
    3096 
    3097         $wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post->ID ) );
    3098 
    3099         clean_post_cache( $post->ID );
    3100 
    3101         $old_status = $post->post_status;
    3102         $post->post_status = 'publish';
    3103         wp_transition_post_status( 'publish', $old_status, $post );
    3104 
    3105         do_action( 'edit_post', $post->ID, $post );
    3106         do_action( 'save_post', $post->ID, $post );
    3107         do_action( 'wp_insert_post', $post->ID, $post );
    3108 }
    3109 
    3110 /**
    3111  * Publish future post and make sure post ID has future post status.
    3112  *
    3113  * Invoked by cron 'publish_future_post' event. This safeguard prevents cron
    3114  * from publishing drafts, etc.
    3115  *
    3116  * @since 2.5.0
    3117  *
    3118  * @param int $post_id Post ID.
    3119  * @return null Nothing is returned. Which can mean that no action is required or post was published.
    3120  */
    3121 function check_and_publish_future_post($post_id) {
    3122 
    3123         $post = get_post($post_id);
    3124 
    3125         if ( empty($post) )
    3126                 return;
    3127 
    3128         if ( 'future' != $post->post_status )
    3129                 return;
    3130 
    3131         $time = strtotime( $post->post_date_gmt . ' GMT' );
    3132 
    3133         if ( $time > time() ) { // Uh oh, someone jumped the gun!
    3134                 wp_clear_scheduled_hook( 'publish_future_post', array( $post_id ) ); // clear anything else in the system
    3135                 wp_schedule_single_event( $time, 'publish_future_post', array( $post_id ) );
    3136                 return;
    3137         }
    3138 
    3139         return wp_publish_post($post_id);
    3140 }
    3141 
    3142 /**
    3143  * Computes a unique slug for the post, when given the desired slug and some post details.
    3144  *
    3145  * @since 2.8.0
    3146  *
    3147  * @global wpdb $wpdb
    3148  * @global WP_Rewrite $wp_rewrite
    3149  * @param string $slug the desired slug (post_name)
    3150  * @param integer $post_ID
    3151  * @param string $post_status no uniqueness checks are made if the post is still draft or pending
    3152  * @param string $post_type
    3153  * @param integer $post_parent
    3154  * @return string unique slug for the post, based on $post_name (with a -1, -2, etc. suffix)
    3155  */
    3156 function wp_unique_post_slug( $slug, $post_ID, $post_status, $post_type, $post_parent ) {
    3157         if ( in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
    3158                 return $slug;
    3159 
    3160         global $wpdb, $wp_rewrite;
    3161 
    3162         $original_slug = $slug;
    3163 
    3164         $feeds = $wp_rewrite->feeds;
    3165         if ( ! is_array( $feeds ) )
    3166                 $feeds = array();
    3167 
    3168         $hierarchical_post_types = get_post_types( array('hierarchical' => true) );
    3169         if ( 'attachment' == $post_type ) {
    3170                 // Attachment slugs must be unique across all types.
    3171                 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND ID != %d LIMIT 1";
    3172                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID ) );
    3173 
    3174                 if ( $post_name_check || in_array( $slug, $feeds ) || apply_filters( 'wp_unique_post_slug_is_bad_attachment_slug', false, $slug ) ) {
    3175                         $suffix = 2;
    3176                         do {
    3177                                 $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
    3178                                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_ID ) );
    3179                                 $suffix++;
    3180                         } while ( $post_name_check );
    3181                         $slug = $alt_post_name;
    3182                 }
    3183         } elseif ( in_array( $post_type, $hierarchical_post_types ) ) {
    3184                 if ( 'nav_menu_item' == $post_type )
    3185                         return $slug;
    3186                 // Page slugs must be unique within their own trees. Pages are in a separate
    3187                 // namespace than posts so page slugs are allowed to overlap post slugs.
    3188                 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type IN ( '" . implode( "', '", esc_sql( $hierarchical_post_types ) ) . "' ) AND ID != %d AND post_parent = %d LIMIT 1";
    3189                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID, $post_parent ) );
    3190 
    3191                 if ( $post_name_check || in_array( $slug, $feeds ) || preg_match( "@^($wp_rewrite->pagination_base)?\d+$@", $slug )  || apply_filters( 'wp_unique_post_slug_is_bad_hierarchical_slug', false, $slug, $post_type, $post_parent ) ) {
    3192                         $suffix = 2;
    3193                         do {
    3194                                 $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
    3195                                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_ID, $post_parent ) );
    3196                                 $suffix++;
    3197                         } while ( $post_name_check );
    3198                         $slug = $alt_post_name;
    3199                 }
    3200         } else {
    3201                 // Post slugs must be unique across all posts.
    3202                 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d LIMIT 1";
    3203                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_type, $post_ID ) );
    3204 
    3205                 if ( $post_name_check || in_array( $slug, $feeds ) || apply_filters( 'wp_unique_post_slug_is_bad_flat_slug', false, $slug, $post_type ) ) {
    3206                         $suffix = 2;
    3207                         do {
    3208                                 $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
    3209                                 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_type, $post_ID ) );
    3210                                 $suffix++;
    3211                         } while ( $post_name_check );
    3212                         $slug = $alt_post_name;
    3213                 }
    3214         }
    3215 
    3216         return apply_filters( 'wp_unique_post_slug', $slug, $post_ID, $post_status, $post_type, $post_parent, $original_slug );
    3217 }
    3218 
    3219 /**
    3220  * Truncates a post slug.
    3221  *
    3222  * @since 3.6.0
    3223  * @access private
    3224  * @uses utf8_uri_encode() Makes sure UTF-8 characters are properly cut and encoded.
    3225  *
    3226  * @param string $slug The slug to truncate.
    3227  * @param int $length Max length of the slug.
    3228  * @return string The truncated slug.
    3229  */
    3230 function _truncate_post_slug( $slug, $length = 200 ) {
    3231         if ( strlen( $slug ) > $length ) {
    3232                 $decoded_slug = urldecode( $slug );
    3233                 if ( $decoded_slug === $slug )
    3234                         $slug = substr( $slug, 0, $length );
    3235                 else
    3236                         $slug = utf8_uri_encode( $decoded_slug, $length );
    3237         }
    3238 
    3239         return rtrim( $slug, '-' );
    3240 }
    3241 
    3242 /**
    3243  * Adds tags to a post.
    3244  *
    3245  * @uses wp_set_post_tags() Same first two parameters, but the last parameter is always set to true.
    3246  *
    3247  * @package WordPress
    3248  * @subpackage Post
    3249  * @since 2.3.0
    3250  *
    3251  * @param int $post_id Post ID
    3252  * @param string $tags The tags to set for the post, separated by commas.
    3253  * @return bool|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
    3254  */
    3255 function wp_add_post_tags($post_id = 0, $tags = '') {
    3256         return wp_set_post_tags($post_id, $tags, true);
    3257 }
    3258 
    3259 /**
    3260  * Set the tags for a post.
    3261  *
    3262  * @since 2.3.0
    3263  * @uses wp_set_object_terms() Sets the tags for the post.
    3264  *
    3265  * @param int $post_id Post ID.
    3266  * @param string $tags The tags to set for the post, separated by commas.
    3267  * @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
    3268  * @return mixed Array of affected term IDs. WP_Error or false on failure.
    3269  */
    3270 function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
    3271         return wp_set_post_terms( $post_id, $tags, 'post_tag', $append);
    3272 }
    3273 
    3274 /**
    3275  * Set the terms for a post.
    3276  *
    3277  * @since 2.8.0
    3278  * @uses wp_set_object_terms() Sets the tags for the post.
    3279  *
    3280  * @param int $post_id Post ID.
    3281  * @param string $tags The tags to set for the post, separated by commas.
    3282  * @param string $taxonomy Taxonomy name. Defaults to 'post_tag'.
    3283  * @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
    3284  * @return mixed Array of affected term IDs. WP_Error or false on failure.
    3285  */
    3286 function wp_set_post_terms( $post_id = 0, $tags = '', $taxonomy = 'post_tag', $append = false ) {
    3287         $post_id = (int) $post_id;
    3288 
    3289         if ( !$post_id )
    3290                 return false;
    3291 
    3292         if ( empty($tags) )
    3293                 $tags = array();
    3294 
    3295         if ( ! is_array( $tags ) ) {
    3296                 $comma = _x( ',', 'tag delimiter' );
    3297                 if ( ',' !== $comma )
    3298                         $tags = str_replace( $comma, ',', $tags );
    3299                 $tags = explode( ',', trim( $tags, " \n\t\r\0\x0B," ) );
    3300         }
    3301 
    3302         // Hierarchical taxonomies must always pass IDs rather than names so that children with the same
    3303         // names but different parents aren't confused.
    3304         if ( is_taxonomy_hierarchical( $taxonomy ) ) {
    3305                 $tags = array_unique( array_map( 'intval', $tags ) );
    3306         }
    3307 
    3308         return wp_set_object_terms( $post_id, $tags, $taxonomy, $append );
    3309 }
    3310 
    3311 /**
    3312  * Set categories for a post.
    3313  *
    3314  * If the post categories parameter is not set, then the default category is
    3315  * going used.
    3316  *
    3317  * @since 2.1.0
    3318  *
    3319  * @param int $post_ID Post ID.
    3320  * @param array $post_categories Optional. List of categories.
    3321  * @return bool|mixed
    3322  */
    3323 function wp_set_post_categories($post_ID = 0, $post_categories = array()) {
    3324         $post_ID = (int) $post_ID;
    3325         $post_type = get_post_type( $post_ID );
    3326         $post_status = get_post_status( $post_ID );
    3327         // If $post_categories isn't already an array, make it one:
    3328         if ( !is_array($post_categories) || empty($post_categories) ) {
    3329                 if ( 'post' == $post_type && 'auto-draft' != $post_status )
    3330                         $post_categories = array( get_option('default_category') );
    3331                 else
    3332                         $post_categories = array();
    3333         } else if ( 1 == count($post_categories) && '' == reset($post_categories) ) {
    3334                 return true;
    3335         }
    3336 
    3337         return wp_set_post_terms($post_ID, $post_categories, 'category');
    3338 }
    3339 
    3340 /**
    3341  * Transition the post status of a post.
    3342  *
    3343  * Calls hooks to transition post status.
    3344  *
    3345  * The first is 'transition_post_status' with new status, old status, and post data.
    3346  *
    3347  * The next action called is 'OLDSTATUS_to_NEWSTATUS' the 'NEWSTATUS' is the
    3348  * $new_status parameter and the 'OLDSTATUS' is $old_status parameter; it has the
    3349  * post data.
    3350  *
    3351  * The final action is named 'NEWSTATUS_POSTTYPE', 'NEWSTATUS' is from the $new_status
    3352  * parameter and POSTTYPE is post_type post data.
    3353  *
    3354  * @since 2.3.0
    3355  * @link http://codex.wordpress.org/Post_Status_Transitions
    3356  *
    3357  * @uses do_action() Calls 'transition_post_status' on $new_status, $old_status and
    3358  *  $post if there is a status change.
    3359  * @uses do_action() Calls '{$old_status}_to_{$new_status}' on $post if there is a status change.
    3360  * @uses do_action() Calls '{$new_status}_{$post->post_type}' on post ID and $post.
    3361  *
    3362  * @param string $new_status Transition to this post status.
    3363  * @param string $old_status Previous post status.
    3364  * @param object $post Post data.
    3365  */
    3366 function wp_transition_post_status($new_status, $old_status, $post) {
    3367         do_action('transition_post_status', $new_status, $old_status, $post);
    3368         do_action("{$old_status}_to_{$new_status}", $post);
    3369         do_action("{$new_status}_{$post->post_type}", $post->ID, $post);
    3370 }
    3371 
    3372 //
    3373 // Trackback and ping functions
    3374 //
    3375 
    3376 /**
    3377  * Add a URL to those already pung.
    3378  *
    3379  * @since 1.5.0
    3380  * @uses $wpdb
    3381  *
    3382  * @param int $post_id Post ID.
    3383  * @param string $uri Ping URI.
    3384  * @return int How many rows were updated.
    3385  */
    3386 function add_ping($post_id, $uri) {
    3387         global $wpdb;
    3388         $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
    3389         $pung = trim($pung);
    3390         $pung = preg_split('/\s/', $pung);
    3391         $pung[] = $uri;
    3392         $new = implode("\n", $pung);
    3393         $new = apply_filters('add_ping', $new);
    3394         // expected_slashed ($new)
    3395         $new = stripslashes($new);
    3396         return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) );
    3397 }
    3398 
    3399 /**
    3400  * Retrieve enclosures already enclosed for a post.
    3401  *
    3402  * @since 1.5.0
    3403  * @uses $wpdb
    3404  *
    3405  * @param int $post_id Post ID.
    3406  * @return array List of enclosures
    3407  */
    3408 function get_enclosed($post_id) {
    3409         $custom_fields = get_post_custom( $post_id );
    3410         $pung = array();
    3411         if ( !is_array( $custom_fields ) )
    3412                 return $pung;
    3413 
    3414         foreach ( $custom_fields as $key => $val ) {
    3415                 if ( 'enclosure' != $key || !is_array( $val ) )
    3416                         continue;
    3417                 foreach( $val as $enc ) {
    3418                         $enclosure = explode( "\n", $enc );
    3419                         $pung[] = trim( $enclosure[ 0 ] );
    3420                 }
    3421         }
    3422         $pung = apply_filters('get_enclosed', $pung, $post_id);
    3423         return $pung;
    3424 }
    3425 
    3426 /**
    3427  * Retrieve URLs already pinged for a post.
    3428  *
    3429  * @since 1.5.0
    3430  * @uses $wpdb
    3431  *
    3432  * @param int $post_id Post ID.
    3433  * @return array
    3434  */
    3435 function get_pung($post_id) {
    3436         global $wpdb;
    3437         $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
    3438         $pung = trim($pung);
    3439         $pung = preg_split('/\s/', $pung);
    3440         $pung = apply_filters('get_pung', $pung);
    3441         return $pung;
    3442 }
    3443 
    3444 /**
    3445  * Retrieve URLs that need to be pinged.
    3446  *
    3447  * @since 1.5.0
    3448  * @uses $wpdb
    3449  *
    3450  * @param int $post_id Post ID
    3451  * @return array
    3452  */
    3453 function get_to_ping($post_id) {
    3454         global $wpdb;
    3455         $to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id ));
    3456         $to_ping = sanitize_trackback_urls( $to_ping );
    3457         $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);
    3458         $to_ping = apply_filters('get_to_ping',  $to_ping);
    3459         return $to_ping;
    3460 }
    3461 
    3462 /**
    3463  * Do trackbacks for a list of URLs.
    3464  *
    3465  * @since 1.0.0
    3466  *
    3467  * @param string $tb_list Comma separated list of URLs
    3468  * @param int $post_id Post ID
    3469  */
    3470 function trackback_url_list($tb_list, $post_id) {
    3471         if ( ! empty( $tb_list ) ) {
    3472                 // get post data
    3473                 $postdata = get_post($post_id, ARRAY_A);
    3474 
    3475                 // import postdata as variables
    3476                 extract($postdata, EXTR_SKIP);
    3477 
    3478                 // form an excerpt
    3479                 $excerpt = strip_tags($post_excerpt ? $post_excerpt : $post_content);
    3480 
    3481                 if (strlen($excerpt) > 255) {
    3482                         $excerpt = substr($excerpt,0,252) . '...';
    3483                 }
    3484 
    3485                 $trackback_urls = explode(',', $tb_list);
    3486                 foreach( (array) $trackback_urls as $tb_url) {
    3487                         $tb_url = trim($tb_url);
    3488                         trackback($tb_url, $post_title, $excerpt, $post_id);
    3489                 }
    3490         }
    3491 }
    3492 
    3493 //
    3494 // Page functions
    3495 //
    3496 
    3497 /**
    3498  * Get a list of page IDs.
    3499  *
    3500  * @since 2.0.0
    3501  * @uses $wpdb
    3502  *
    3503  * @return array List of page IDs.
    3504  */
    3505 function get_all_page_ids() {
    3506         global $wpdb;
    3507 
    3508         $page_ids = wp_cache_get('all_page_ids', 'posts');
    3509         if ( ! is_array( $page_ids ) ) {
    3510                 $page_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type = 'page'");
    3511                 wp_cache_add('all_page_ids', $page_ids, 'posts');
    3512         }
    3513 
    3514         return $page_ids;
    3515 }
    3516 
    3517 /**
    3518  * Retrieves page data given a page ID or page object.
    3519  *
    3520  * Use get_post() instead of get_page().
    3521  *
    3522  * @since 1.5.1
    3523  * @deprecated 3.5.0
    3524  *
    3525  * @param mixed $page Page object or page ID. Passed by reference.
    3526  * @param string $output What to output. OBJECT, ARRAY_A, or ARRAY_N.
    3527  * @param string $filter How the return value should be filtered.
    3528  * @return WP_Post|null WP_Post on success or null on failure
    3529  */
    3530 function get_page( $page, $output = OBJECT, $filter = 'raw') {
    3531         return get_post( $page, $output, $filter );
    3532 }
    3533 
    3534 /**
    3535  * Retrieves a page given its path.
    3536  *
    3537  * @since 2.1.0
    3538  * @uses $wpdb
    3539  *
    3540  * @param string $page_path Page path
    3541  * @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A. Default OBJECT.
    3542  * @param string $post_type Optional. Post type. Default page.
    3543  * @return WP_Post|null WP_Post on success or null on failure
    3544  */
    3545 function get_page_by_path($page_path, $output = OBJECT, $post_type = 'page') {
    3546         global $wpdb;
    3547 
    3548         $page_path = rawurlencode(urldecode($page_path));
    3549         $page_path = str_replace('%2F', '/', $page_path);
    3550         $page_path = str_replace('%20', ' ', $page_path);
    3551         $parts = explode( '/', trim( $page_path, '/' ) );
    3552         $parts = array_map( 'esc_sql', $parts );
    3553         $parts = array_map( 'sanitize_title_for_query', $parts );
    3554 
    3555         $in_string = "'". implode( "','", $parts ) . "'";
    3556         $post_type_sql = $post_type;
    3557         $wpdb->escape_by_ref( $post_type_sql );
    3558         $pages = $wpdb->get_results( "SELECT ID, post_name, post_parent, post_type FROM $wpdb->posts WHERE post_name IN ($in_string) AND (post_type = '$post_type_sql' OR post_type = 'attachment')", OBJECT_K );
    3559 
    3560         $revparts = array_reverse( $parts );
    3561 
    3562         $foundid = 0;
    3563         foreach ( (array) $pages as $page ) {
    3564                 if ( $page->post_name == $revparts[0] ) {
    3565                         $count = 0;
    3566                         $p = $page;
    3567                         while ( $p->post_parent != 0 && isset( $pages[ $p->post_parent ] ) ) {
    3568                                 $count++;
    3569                                 $parent = $pages[ $p->post_parent ];
    3570                                 if ( ! isset( $revparts[ $count ] ) || $parent->post_name != $revparts[ $count ] )
    3571                                         break;
    3572                                 $p = $parent;
    3573                         }
    3574 
    3575                         if ( $p->post_parent == 0 && $count+1 == count( $revparts ) && $p->post_name == $revparts[ $count ] ) {
    3576                                 $foundid = $page->ID;
    3577                                 if ( $page->post_type == $post_type )
    3578                                         break;
    3579                         }
    3580                 }
    3581         }
    3582 
    3583         if ( $foundid )
    3584                 return get_post( $foundid, $output );
    3585 
    3586         return null;
    3587 }
    3588 
    3589 /**
    3590  * Retrieve a page given its title.
    3591  *
    3592  * @since 2.1.0
    3593  * @uses $wpdb
    3594  *
    3595  * @param string $page_title Page title
    3596  * @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A. Default OBJECT.
    3597  * @param string $post_type Optional. Post type. Default page.
    3598  * @return WP_Post|null WP_Post on success or null on failure
    3599  */
    3600 function get_page_by_title($page_title, $output = OBJECT, $post_type = 'page' ) {
    3601         global $wpdb;
    3602         $page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type= %s", $page_title, $post_type ) );
    3603         if ( $page )
    3604                 return get_post( $page, $output );
    3605 
    3606         return null;
    3607 }
    3608 
    3609 /**
    3610  * Retrieve child pages from list of pages matching page ID.
    3611  *
    3612  * Matches against the pages parameter against the page ID. Also matches all
    3613  * children for the same to retrieve all children of a page. Does not make any
    3614  * SQL queries to get the children.
    3615  *
    3616  * @since 1.5.1
    3617  *
    3618  * @param int $page_id Page ID.
    3619  * @param array $pages List of pages' objects.
    3620  * @return array
    3621  */
    3622 function get_page_children($page_id, $pages) {
    3623         $page_list = array();
    3624         foreach ( (array) $pages as $page ) {
    3625                 if ( $page->post_parent == $page_id ) {
    3626                         $page_list[] = $page;
    3627                         if ( $children = get_page_children($page->ID, $pages) )
    3628                                 $page_list = array_merge($page_list, $children);
    3629                 }
    3630         }
    3631         return $page_list;
    3632 }
    3633 
    3634 /**
    3635  * Order the pages with children under parents in a flat list.
    3636  *
    3637  * It uses auxiliary structure to hold parent-children relationships and
    3638  * runs in O(N) complexity
    3639  *
    3640  * @since 2.0.0
    3641  *
    3642  * @param array $pages Posts array.
    3643  * @param int $page_id Parent page ID.
    3644  * @return array A list arranged by hierarchy. Children immediately follow their parents.
    3645  */
    3646 function get_page_hierarchy( &$pages, $page_id = 0 ) {
    3647         if ( empty( $pages ) ) {
    3648                 $result = array();
    3649                 return $result;
    3650         }
    3651 
    3652         $children = array();
    3653         foreach ( (array) $pages as $p ) {
    3654                 $parent_id = intval( $p->post_parent );
    3655                 $children[ $parent_id ][] = $p;
    3656         }
    3657 
    3658         $result = array();
    3659         _page_traverse_name( $page_id, $children, $result );
    3660 
    3661         return $result;
    3662 }
    3663 
    3664 /**
    3665  * function to traverse and return all the nested children post names of a root page.
    3666  * $children contains parent-children relations
    3667  *
    3668  * @since 2.9.0
    3669  */
    3670 function _page_traverse_name( $page_id, &$children, &$result ){
    3671         if ( isset( $children[ $page_id ] ) ){
    3672                 foreach( (array)$children[ $page_id ] as $child ) {
    3673                         $result[ $child->ID ] = $child->post_name;
    3674                         _page_traverse_name( $child->ID, $children, $result );
    3675                 }
    3676         }
    3677 }
    3678 
    3679 /**
    3680  * Builds URI for a page.
    3681  *
    3682  * Sub pages will be in the "directory" under the parent page post name.
    3683  *
    3684  * @since 1.5.0
    3685  *
    3686  * @param mixed $page Page object or page ID.
    3687  * @return string Page URI.
    3688  */
    3689 function get_page_uri($page) {
    3690         $page = get_post( $page );
    3691 
    3692         $uri = $page->post_name;
    3693 
    3694         foreach ( $page->ancestors as $parent ) {
    3695                 $uri = get_post( $parent )->post_name . "/" . $uri;
    3696         }
    3697 
    3698         return $uri;
    3699 }
    3700 
    3701 /**
    3702  * Retrieve a list of pages.
    3703  *
    3704  * The defaults that can be overridden are the following: 'child_of',
    3705  * 'sort_order', 'sort_column', 'post_title', 'hierarchical', 'exclude',
    3706  * 'include', 'meta_key', 'meta_value','authors', 'number', and 'offset'.
    3707  *
    3708  * @since 1.5.0
    3709  * @uses $wpdb
    3710  *
    3711  * @param mixed $args Optional. Array or string of options that overrides defaults.
    3712  * @return array List of pages matching defaults or $args
    3713  */
    3714 function get_pages($args = '') {
    3715         global $wpdb;
    3716 
    3717         $pages = false;
    3718 
    3719         $defaults = array(
    3720                 'child_of' => 0, 'sort_order' => 'ASC',
    3721                 'sort_column' => 'post_title', 'hierarchical' => 1,
    3722                 'exclude' => array(), 'include' => array(),
    3723                 'meta_key' => '', 'meta_value' => '',
    3724                 'authors' => '', 'parent' => -1, 'exclude_tree' => '',
    3725                 'number' => '', 'offset' => 0,
    3726                 'post_type' => 'page', 'post_status' => 'publish',
    3727         );
    3728 
    3729         $r = wp_parse_args( $args, $defaults );
    3730         extract( $r, EXTR_SKIP );
    3731         $number = (int) $number;
    3732         $offset = (int) $offset;
    3733 
    3734         // Make sure the post type is hierarchical
    3735         $hierarchical_post_types = get_post_types( array( 'hierarchical' => true ) );
    3736         if ( !in_array( $post_type, $hierarchical_post_types ) )
    3737                 return $pages;
    3738 
    3739         // Make sure we have a valid post status
    3740         if ( !is_array( $post_status ) )
    3741                 $post_status = explode( ',', $post_status );
    3742         if ( array_diff( $post_status, get_post_stati() ) )
    3743                 return $pages;
    3744 
    3745         // $args can be whatever, only use the args defined in defaults to compute the key
    3746         $key = md5( serialize( compact(array_keys($defaults)) ) );
    3747         $last_changed = wp_cache_get( 'last_changed', 'posts' );
    3748         if ( ! $last_changed ) {
    3749                 $last_changed = microtime();
    3750                 wp_cache_set( 'last_changed', $last_changed, 'posts' );
    3751         }
    3752 
    3753         $cache_key = "get_pages:$key:$last_changed";
    3754         if ( $cache = wp_cache_get( $cache_key, 'posts' ) ) {
    3755                 // Convert to WP_Post instances
    3756                 $pages = array_map( 'get_post', $cache );
    3757                 $pages = apply_filters('get_pages', $pages, $r);
    3758                 return $pages;
    3759         }
    3760 
    3761         if ( !is_array($cache) )
    3762                 $cache = array();
    3763 
    3764         $inclusions = '';
    3765         if ( !empty($include) ) {
    3766                 $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include
    3767                 $parent = -1;
    3768                 $exclude = '';
    3769                 $meta_key = '';
    3770                 $meta_value = '';
    3771                 $hierarchical = false;
    3772                 $incpages = wp_parse_id_list( $include );
    3773                 if ( ! empty( $incpages ) ) {
    3774                         foreach ( $incpages as $incpage ) {
    3775                                 if (empty($inclusions))
    3776                                         $inclusions = $wpdb->prepare(' AND ( ID = %d ', $incpage);
    3777                                 else
    3778                                         $inclusions .= $wpdb->prepare(' OR ID = %d ', $incpage);
    3779                         }
    3780                 }
    3781         }
    3782         if (!empty($inclusions))
    3783                 $inclusions .= ')';
    3784 
    3785         $exclusions = '';
    3786         if ( !empty($exclude) ) {
    3787                 $expages = wp_parse_id_list( $exclude );
    3788                 if ( ! empty( $expages ) ) {
    3789                         foreach ( $expages as $expage ) {
    3790                                 if (empty($exclusions))
    3791                                         $exclusions = $wpdb->prepare(' AND ( ID <> %d ', $expage);
    3792                                 else
    3793                                         $exclusions .= $wpdb->prepare(' AND ID <> %d ', $expage);
    3794                         }
    3795                 }
    3796         }
    3797         if (!empty($exclusions))
    3798                 $exclusions .= ')';
    3799 
    3800         $author_query = '';
    3801         if (!empty($authors)) {
    3802                 $post_authors = preg_split('/[\s,]+/',$authors);
    3803 
    3804                 if ( ! empty( $post_authors ) ) {
    3805                         foreach ( $post_authors as $post_author ) {
    3806                                 //Do we have an author id or an author login?
    3807                                 if ( 0 == intval($post_author) ) {
    3808                                         $post_author = get_user_by('login', $post_author);
    3809                                         if ( empty($post_author) )
    3810                                                 continue;
    3811                                         if ( empty($post_author->ID) )
    3812                                                 continue;
    3813                                         $post_author = $post_author->ID;
    3814                                 }
    3815 
    3816                                 if ( '' == $author_query )
    3817                                         $author_query = $wpdb->prepare(' post_author = %d ', $post_author);
    3818                                 else
    3819                                         $author_query .= $wpdb->prepare(' OR post_author = %d ', $post_author);
    3820                         }
    3821                         if ( '' != $author_query )
    3822                                 $author_query = " AND ($author_query)";
    3823                 }
    3824         }
    3825 
    3826         $join = '';
    3827         $where = "$exclusions $inclusions ";
    3828         if ( ! empty( $meta_key ) || ! empty( $meta_value ) ) {
    3829                 $join = " LEFT JOIN $wpdb->postmeta ON ( $wpdb->posts.ID = $wpdb->postmeta.post_id )";
    3830 
    3831                 if ( ! empty( $meta_key ) )
    3832                         $where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_key = %s", $meta_key);
    3833                 if ( ! empty( $meta_value ) )
    3834                         $where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_value = %s", $meta_value);
    3835 
    3836         }
    3837 
    3838         if ( $parent >= 0 )
    3839                 $where .= $wpdb->prepare(' AND post_parent = %d ', $parent);
    3840 
    3841         if ( 1 == count( $post_status ) ) {
    3842                 $where_post_type = $wpdb->prepare( "post_type = %s AND post_status = %s", $post_type, array_shift( $post_status ) );
    3843         } else {
    3844                 $post_status = implode( "', '", $post_status );
    3845                 $where_post_type = $wpdb->prepare( "post_type = %s AND post_status IN ('$post_status')", $post_type );
    3846         }
    3847 
    3848         $orderby_array = array();
    3849         $allowed_keys = array('author', 'post_author', 'date', 'post_date', 'title', 'post_title', 'name', 'post_name', 'modified',
    3850                                                   'post_modified', 'modified_gmt', 'post_modified_gmt', 'menu_order', 'parent', 'post_parent',
    3851                                                   'ID', 'rand', 'comment_count');
    3852         foreach ( explode( ',', $sort_column ) as $orderby ) {
    3853                 $orderby = trim( $orderby );
    3854                 if ( !in_array( $orderby, $allowed_keys ) )
    3855                         continue;
    3856 
    3857                 switch ( $orderby ) {
    3858                         case 'menu_order':
    3859                                 break;
    3860                         case 'ID':
    3861                                 $orderby = "$wpdb->posts.ID";
    3862                                 break;
    3863                         case 'rand':
    3864                                 $orderby = 'RAND()';
    3865                                 break;
    3866                         case 'comment_count':
    3867                                 $orderby = "$wpdb->posts.comment_count";
    3868                                 break;
    3869                         default:
    3870                                 if ( 0 === strpos( $orderby, 'post_' ) )
    3871                                         $orderby = "$wpdb->posts." . $orderby;
    3872                                 else
    3873                                         $orderby = "$wpdb->posts.post_" . $orderby;
    3874                 }
    3875 
    3876                 $orderby_array[] = $orderby;
    3877 
    3878         }
    3879         $sort_column = ! empty( $orderby_array ) ? implode( ',', $orderby_array ) : "$wpdb->posts.post_title";
    3880 
    3881         $sort_order = strtoupper( $sort_order );
    3882         if ( '' !== $sort_order && !in_array( $sort_order, array( 'ASC', 'DESC' ) ) )
    3883                 $sort_order = 'ASC';
    3884 
    3885         $query = "SELECT * FROM $wpdb->posts $join WHERE ($where_post_type) $where ";
    3886         $query .= $author_query;
    3887         $query .= " ORDER BY " . $sort_column . " " . $sort_order ;
    3888 
    3889         if ( !empty($number) )
    3890                 $query .= ' LIMIT ' . $offset . ',' . $number;
    3891 
    3892         $pages = $wpdb->get_results($query);
    3893 
    3894         if ( empty($pages) ) {
    3895                 $pages = apply_filters('get_pages', array(), $r);
    3896                 return $pages;
    3897         }
    3898 
    3899         // Sanitize before caching so it'll only get done once
    3900         $num_pages = count($pages);
    3901         for ($i = 0; $i < $num_pages; $i++) {
    3902                 $pages[$i] = sanitize_post($pages[$i], 'raw');
    3903         }
    3904 
    3905         // Update cache.
    3906         update_post_cache( $pages );
    3907 
    3908         if ( $child_of || $hierarchical )
    3909                 $pages = get_page_children($child_of, $pages);
    3910 
    3911         if ( !empty($exclude_tree) ) {
    3912                 $exclude = (int) $exclude_tree;
    3913                 $children = get_page_children($exclude, $pages);
    3914                 $excludes = array();
    3915                 foreach ( $children as $child )
    3916                         $excludes[] = $child->ID;
    3917                 $excludes[] = $exclude;
    3918                 $num_pages = count($pages);
    3919                 for ( $i = 0; $i < $num_pages; $i++ ) {
    3920                         if ( in_array($pages[$i]->ID, $excludes) )
    3921                                 unset($pages[$i]);
    3922                 }
    3923         }
    3924 
    3925         $page_structure = array();
    3926         foreach ( $pages as $page )
    3927                 $page_structure[] = $page->ID;
    3928 
    3929         wp_cache_set( $cache_key, $page_structure, 'posts' );
    3930 
    3931         // Convert to WP_Post instances
    3932         $pages = array_map( 'get_post', $pages );
    3933 
    3934         $pages = apply_filters('get_pages', $pages, $r);
    3935 
    3936         return $pages;
    3937 }
    3938 
    3939 //
    3940 // Attachment functions
    3941 //
    3942 
    3943 /**
    3944  * Check if the attachment URI is local one and is really an attachment.
    3945  *
    3946  * @since 2.0.0
    3947  *
    3948  * @param string $url URL to check
    3949  * @return bool True on success, false on failure.
    3950  */
    3951 function is_local_attachment($url) {
    3952         if (strpos($url, home_url()) === false)
    3953                 return false;
    3954         if (strpos($url, home_url('/?attachment_id=')) !== false)
    3955                 return true;
    3956         if ( $id = url_to_postid($url) ) {
    3957                 $post = get_post($id);
    3958                 if ( 'attachment' == $post->post_type )
    3959                         return true;
    3960         }
    3961         return false;
    3962 }
    3963 
    3964 /**
    3965  * Insert an attachment.
    3966  *
    3967  * If you set the 'ID' in the $object parameter, it will mean that you are
    3968  * updating and attempt to update the attachment. You can also set the
    3969  * attachment name or title by setting the key 'post_name' or 'post_title'.
    3970  *
    3971  * You can set the dates for the attachment manually by setting the 'post_date'
    3972  * and 'post_date_gmt' keys' values.
    3973  *
    3974  * By default, the comments will use the default settings for whether the
    3975  * comments are allowed. You can close them manually or keep them open by
    3976  * setting the value for the 'comment_status' key.
    3977  *
    3978  * The $object parameter can have the following:
    3979  *     'post_status'   - Default is 'draft'. Can not be overridden, set the same as parent post.
    3980  *     'post_type'     - Default is 'post', will be set to attachment. Can not override.
    3981  *     'post_author'   - Default is current user ID. The ID of the user, who added the attachment.
    3982  *     'ping_status'   - Default is the value in default ping status option. Whether the attachment
    3983  *                       can accept pings.
    3984  *     'post_parent'   - Default is 0. Can use $parent parameter or set this for the post it belongs
    3985  *                       to, if any.
    3986  *     'menu_order'    - Default is 0. The order it is displayed.
    3987  *     'to_ping'       - Whether to ping.
    3988  *     'pinged'        - Default is empty string.
    3989  *     'post_password' - Default is empty string. The password to access the attachment.
    3990  *     'guid'          - Global Unique ID for referencing the attachment.
    3991  *     'post_content_filtered' - Attachment post content filtered.
    3992  *     'post_excerpt'  - Attachment excerpt.
    3993  *
    3994  * @since 2.0.0
    3995  * @uses $wpdb
    3996  * @uses $user_ID
    3997  * @uses do_action() Calls 'edit_attachment' on $post_ID if this is an update.
    3998  * @uses do_action() Calls 'add_attachment' on $post_ID if this is not an update.
    3999  *
    4000  * @param string|array $object Arguments to override defaults.
    4001  * @param string $file Optional filename.
    4002  * @param int $parent Parent post ID.
    4003  * @return int Attachment ID.
    4004  */
    4005 function wp_insert_attachment($object, $file = false, $parent = 0) {
    4006         global $wpdb, $user_ID;
    4007 
    4008         $defaults = array('post_status' => 'inherit', 'post_type' => 'post', 'post_author' => $user_ID,
    4009                 'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
    4010                 'menu_order' => 0, 'to_ping' =>  '', 'pinged' => '', 'post_password' => '',
    4011                 'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0, 'context' => '');
    4012 
    4013         $object = wp_parse_args($object, $defaults);
    4014         if ( !empty($parent) )
    4015                 $object['post_parent'] = $parent;
    4016 
    4017         unset( $object[ 'filter' ] );
    4018 
    4019         $object = sanitize_post($object, 'db');
    4020 
    4021         // export array as variables
    4022         extract($object, EXTR_SKIP);
    4023 
    4024         if ( empty($post_author) )
    4025                 $post_author = $user_ID;
    4026 
    4027         $post_type = 'attachment';
    4028 
    4029         if ( ! in_array( $post_status, array( 'inherit', 'private' ) ) )
    4030                 $post_status = 'inherit';
    4031 
    4032         if ( !empty($post_category) )
    4033                 $post_category = array_filter($post_category); // Filter out empty terms
    4034 
    4035         // Make sure we set a valid category.
    4036         if ( empty($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
    4037                 $post_category = array();
    4038         }
    4039 
    4040         // Are we updating or creating?
    4041         if ( !empty($ID) ) {
    4042                 $update = true;
    4043                 $post_ID = (int) $ID;
    4044         } else {
    4045                 $update = false;
    4046                 $post_ID = 0;
    4047         }
    4048 
    4049         // Create a valid post name.
    4050         if ( empty($post_name) )
    4051                 $post_name = sanitize_title($post_title);
    4052         else
    4053                 $post_name = sanitize_title($post_name);
    4054 
    4055         $post_name = wp_unique_post_slug($post_name, $post_ID, $post_status, $post_type, $post_parent);
    4056 
    4057         if ( empty($post_date) )
    4058                 $post_date = current_time('mysql');
    4059         if ( empty($post_date_gmt) )
    4060                 $post_date_gmt = current_time('mysql', 1);
    4061 
    4062         if ( empty($post_modified) )
    4063                 $post_modified = $post_date;
    4064         if ( empty($post_modified_gmt) )
    4065                 $post_modified_gmt = $post_date_gmt;
    4066 
    4067         if ( empty($comment_status) ) {
    4068                 if ( $update )
    4069                         $comment_status = 'closed';
    4070                 else
    4071                         $comment_status = get_option('default_comment_status');
    4072         }
    4073         if ( empty($ping_status) )
    4074                 $ping_status = get_option('default_ping_status');
    4075 
    4076         if ( isset($to_ping) )
    4077                 $to_ping = preg_replace('|\s+|', "\n", $to_ping);
    4078         else
    4079                 $to_ping = '';
    4080 
    4081         if ( isset($post_parent) )
    4082                 $post_parent = (int) $post_parent;
    4083         else
    4084                 $post_parent = 0;
    4085 
    4086         if ( isset($menu_order) )
    4087                 $menu_order = (int) $menu_order;
    4088         else
    4089                 $menu_order = 0;
    4090 
    4091         if ( !isset($post_password) )
    4092                 $post_password = '';
    4093 
    4094         if ( ! isset($pinged) )
    4095                 $pinged = '';
    4096 
    4097         $data = compact( array( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_content_filtered', 'post_title', 'post_excerpt', 'post_status', 'post_type', 'comment_status', 'ping_status', 'post_password', 'post_name', 'to_ping', 'pinged', 'post_modified', 'post_modified_gmt', 'post_parent', 'menu_order', 'post_mime_type', 'guid' ) );
    4098 
    4099         if ( $update ) {
    4100                 $wpdb->update( $wpdb->posts, $data, array( 'ID' => $post_ID ) );
    4101         } else {
    4102                 // If there is a suggested ID, use it if not already present
    4103                 if ( !empty($import_id) ) {
    4104                         $import_id = (int) $import_id;
    4105                         if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
    4106                                 $data['ID'] = $import_id;
    4107                         }
    4108                 }
    4109 
    4110                 $wpdb->insert( $wpdb->posts, $data );
    4111                 $post_ID = (int) $wpdb->insert_id;
    4112         }
    4113 
    4114         if ( empty($post_name) ) {
    4115                 $post_name = sanitize_title($post_title, $post_ID);
    4116                 $wpdb->update( $wpdb->posts, compact("post_name"), array( 'ID' => $post_ID ) );
    4117         }
    4118 
    4119         if ( is_object_in_taxonomy($post_type, 'category') )
    4120                 wp_set_post_categories( $post_ID, $post_category );
    4121 
    4122         if ( isset( $tags_input ) && is_object_in_taxonomy($post_type, 'post_tag') )
    4123                 wp_set_post_tags( $post_ID, $tags_input );
    4124 
    4125         // support for all custom taxonomies
    4126         if ( !empty($tax_input) ) {
    4127                 foreach ( $tax_input as $taxonomy => $tags ) {
    4128                         $taxonomy_obj = get_taxonomy($taxonomy);
    4129                         if ( is_array($tags) ) // array = hierarchical, string = non-hierarchical.
    4130                                 $tags = array_filter($tags);
    4131                         if ( current_user_can($taxonomy_obj->cap->assign_terms) )
    4132                                 wp_set_post_terms( $post_ID, $tags, $taxonomy );
    4133                 }
    4134         }
    4135 
    4136         if ( $file )
    4137                 update_attached_file( $post_ID, $file );
    4138 
    4139         clean_post_cache( $post_ID );
    4140 
    4141         if ( ! empty( $context ) )
    4142                 wp_add_post_meta( $post_ID, '_wp_attachment_context', $context, true );
    4143 
    4144         if ( $update) {
    4145                 do_action('edit_attachment', $post_ID);
    4146         } else {
    4147                 do_action('add_attachment', $post_ID);
    4148         }
    4149 
    4150         return $post_ID;
    4151 }
    4152 
    4153 /**
    4154  * Trashes or deletes an attachment.
    4155  *
    4156  * When an attachment is permanently deleted, the file will also be removed.
    4157  * Deletion removes all post meta fields, taxonomy, comments, etc. associated
    4158  * with the attachment (except the main post).
    4159  *
    4160  * The attachment is moved to the trash instead of permanently deleted unless trash
    4161  * for media is disabled, item is already in the trash, or $force_delete is true.
    4162  *
    4163  * @since 2.0.0
    4164  * @uses $wpdb
    4165  * @uses do_action() Calls 'delete_attachment' hook on Attachment ID.
    4166  *
    4167  * @param int $post_id Attachment ID.
    4168  * @param bool $force_delete Whether to bypass trash and force deletion. Defaults to false.
    4169  * @return mixed False on failure. Post data on success.
    4170  */
    4171 function wp_delete_attachment( $post_id, $force_delete = false ) {
    4172         global $wpdb;
    4173 
    4174         if ( !$post = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id) ) )
    4175                 return $post;
    4176 
    4177         if ( 'attachment' != $post->post_type )
    4178                 return false;
    4179 
    4180         if ( !$force_delete && EMPTY_TRASH_DAYS && MEDIA_TRASH && 'trash' != $post->post_status )
    4181                 return wp_trash_post( $post_id );
    4182 
    4183         delete_post_meta($post_id, '_wp_trash_meta_status');
    4184         delete_post_meta($post_id, '_wp_trash_meta_time');
    4185 
    4186         $meta = wp_get_attachment_metadata( $post_id );
    4187         $backup_sizes = get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true );
    4188         $file = get_attached_file( $post_id );
    4189 
    4190         $intermediate_sizes = array();
    4191         foreach ( get_intermediate_image_sizes() as $size ) {
    4192                 if ( $intermediate = image_get_intermediate_size( $post_id, $size ) )
    4193                         $intermediate_sizes[] = $intermediate;
    4194         }
    4195 
    4196         if ( is_multisite() )
    4197                 delete_transient( 'dirsize_cache' );
    4198 
    4199         do_action('delete_attachment', $post_id);
    4200 
    4201         wp_delete_object_term_relationships($post_id, array('category', 'post_tag'));
    4202         wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type));
    4203 
    4204         delete_metadata( 'post', null, '_thumbnail_id', $post_id, true ); // delete all for any posts.
    4205 
    4206         $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ));
    4207         foreach ( $comment_ids as $comment_id )
    4208                 wp_delete_comment( $comment_id, true );
    4209 
    4210         $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id ));
    4211         foreach ( $post_meta_ids as $mid )
    4212                 delete_metadata_by_mid( 'post', $mid );
    4213 
    4214         do_action( 'delete_post', $post_id );
    4215         $wpdb->delete( $wpdb->posts, array( 'ID' => $post_id ) );
    4216         do_action( 'deleted_post', $post_id );
    4217 
    4218         $uploadpath = wp_upload_dir();
    4219 
    4220         if ( ! empty($meta['thumb']) ) {
    4221                 // Don't delete the thumb if another attachment uses it
    4222                 if (! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $meta['thumb'] . '%', $post_id)) ) {
    4223                         $thumbfile = str_replace(basename($file), $meta['thumb'], $file);
    4224                         $thumbfile = apply_filters('wp_delete_file', $thumbfile);
    4225                         @ unlink( path_join($uploadpath['basedir'], $thumbfile) );
    4226                 }
    4227         }
    4228 
    4229         // remove intermediate and backup images if there are any
    4230         foreach ( $intermediate_sizes as $intermediate ) {
    4231                 $intermediate_file = apply_filters( 'wp_delete_file', $intermediate['path'] );
    4232                 @ unlink( path_join($uploadpath['basedir'], $intermediate_file) );
    4233         }
    4234 
    4235         if ( is_array($backup_sizes) ) {
    4236                 foreach ( $backup_sizes as $size ) {
    4237                         $del_file = path_join( dirname($meta['file']), $size['file'] );
    4238                         $del_file = apply_filters('wp_delete_file', $del_file);
    4239                         @ unlink( path_join($uploadpath['basedir'], $del_file) );
    4240                 }
    4241         }
    4242 
    4243         $file = apply_filters('wp_delete_file', $file);
    4244 
    4245         if ( ! empty($file) )
    4246                 @ unlink($file);
    4247 
    4248         clean_post_cache( $post );
    4249 
    4250         return $post;
    4251 }
    4252 
    4253 /**
    4254  * Retrieve attachment meta field for attachment ID.
    4255  *
    4256  * @since 2.1.0
    4257  *
    4258  * @param int $post_id Attachment ID
    4259  * @param bool $unfiltered Optional, default is false. If true, filters are not run.
    4260  * @return string|bool Attachment meta field. False on failure.
    4261  */
    4262 function wp_get_attachment_metadata( $post_id = 0, $unfiltered = false ) {
    4263         $post_id = (int) $post_id;
    4264         if ( !$post = get_post( $post_id ) )
    4265                 return false;
    4266 
    4267         $data = get_post_meta( $post->ID, '_wp_attachment_metadata', true );
    4268 
    4269         if ( $unfiltered )
    4270                 return $data;
    4271 
    4272         return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID );
    4273 }
    4274 
    4275 /**
    4276  * Update metadata for an attachment.
    4277  *
    4278  * @since 2.1.0
    4279  *
    4280  * @param int $post_id Attachment ID.
    4281  * @param array $data Attachment data.
    4282  * @return int
    4283  */
    4284 function wp_update_attachment_metadata( $post_id, $data ) {
    4285         $post_id = (int) $post_id;
    4286         if ( !$post = get_post( $post_id ) )
    4287                 return false;
    4288 
    4289         if ( $data = apply_filters( 'wp_update_attachment_metadata', $data, $post->ID ) )
    4290                 return update_post_meta( $post->ID, '_wp_attachment_metadata', $data );
    4291         else
    4292                 return delete_post_meta( $post->ID, '_wp_attachment_metadata' );
    4293 }
    4294 
    4295 /**
    4296  * Retrieve the URL for an attachment.
    4297  *
    4298  * @since 2.1.0
    4299  *
    4300  * @param int $post_id Attachment ID.
    4301  * @return string
    4302  */
    4303 function wp_get_attachment_url( $post_id = 0 ) {
    4304         $post_id = (int) $post_id;
    4305         if ( !$post = get_post( $post_id ) )
    4306                 return false;
    4307 
    4308         if ( 'attachment' != $post->post_type )
    4309                 return false;
    4310 
    4311         $url = '';
    4312         if ( $file = get_post_meta( $post->ID, '_wp_attached_file', true) ) { //Get attached file
    4313                 if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { //Get upload directory
    4314                         if ( 0 === strpos($file, $uploads['basedir']) ) //Check that the upload base exists in the file location
    4315                                 $url = str_replace($uploads['basedir'], $uploads['baseurl'], $file); //replace file location with url location
    4316                         elseif ( false !== strpos($file, 'wp-content/uploads') )
    4317                                 $url = $uploads['baseurl'] . substr( $file, strpos($file, 'wp-content/uploads') + 18 );
    4318                         else
    4319                                 $url = $uploads['baseurl'] . "/$file"; //Its a newly uploaded file, therefor $file is relative to the basedir.
    4320                 }
    4321         }
    4322 
    4323         if ( empty($url) ) //If any of the above options failed, Fallback on the GUID as used pre-2.7, not recommended to rely upon this.
    4324                 $url = get_the_guid( $post->ID );
    4325 
    4326         $url = apply_filters( 'wp_get_attachment_url', $url, $post->ID );
    4327 
    4328         if ( empty( $url ) )
    4329                 return false;
    4330 
    4331         return $url;
    4332 }
    4333 
    4334 /**
    4335  * Retrieve thumbnail for an attachment.
    4336  *
    4337  * @since 2.1.0
    4338  *
    4339  * @param int $post_id Attachment ID.
    4340  * @return mixed False on failure. Thumbnail file path on success.
    4341  */
    4342 function wp_get_attachment_thumb_file( $post_id = 0 ) {
    4343         $post_id = (int) $post_id;
    4344         if ( !$post = get_post( $post_id ) )
    4345                 return false;
    4346         if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) )
    4347                 return false;
    4348 
    4349         $file = get_attached_file( $post->ID );
    4350 
    4351         if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) )
    4352                 return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID );
    4353         return false;
    4354 }
    4355 
    4356 /**
    4357  * Retrieve URL for an attachment thumbnail.
    4358  *
    4359  * @since 2.1.0
    4360  *
    4361  * @param int $post_id Attachment ID
    4362  * @return string|bool False on failure. Thumbnail URL on success.
    4363  */
    4364 function wp_get_attachment_thumb_url( $post_id = 0 ) {
    4365         $post_id = (int) $post_id;
    4366         if ( !$post = get_post( $post_id ) )
    4367                 return false;
    4368         if ( !$url = wp_get_attachment_url( $post->ID ) )
    4369                 return false;
    4370 
    4371         $sized = image_downsize( $post_id, 'thumbnail' );
    4372         if ( $sized )
    4373                 return $sized[0];
    4374 
    4375         if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
    4376                 return false;
    4377 
    4378         $url = str_replace(basename($url), basename($thumb), $url);
    4379 
    4380         return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
    4381 }
    4382 
    4383 /**
    4384  * Check if the attachment is an image.
    4385  *
    4386  * @since 2.1.0
    4387  *
    4388  * @param int $post_id Attachment ID
    4389  * @return bool
    4390  */
    4391 function wp_attachment_is_image( $post_id = 0 ) {
    4392         $post_id = (int) $post_id;
    4393         if ( !$post = get_post( $post_id ) )
    4394                 return false;
    4395 
    4396         if ( !$file = get_attached_file( $post->ID ) )
    4397                 return false;
    4398 
    4399         $ext = preg_match('/\.([^.]+)$/', $file, $matches) ? strtolower($matches[1]) : false;
    4400 
    4401         $image_exts = array( 'jpg', 'jpeg', 'jpe', 'gif', 'png' );
    4402 
    4403         if ( 'image/' == substr($post->post_mime_type, 0, 6) || $ext && 'import' == $post->post_mime_type && in_array($ext, $image_exts) )
    4404                 return true;
    4405         return false;
    4406 }
    4407 
    4408 /**
    4409  * Retrieve the icon for a MIME type.
    4410  *
    4411  * @since 2.1.0
    4412  *
    4413  * @param string|int $mime MIME type or attachment ID.
    4414  * @return string|bool
    4415  */
    4416 function wp_mime_type_icon( $mime = 0 ) {
    4417         if ( !is_numeric($mime) )
    4418                 $icon = wp_cache_get("mime_type_icon_$mime");
    4419 
    4420         $post_id = 0;
    4421         if ( empty($icon) ) {
    4422                 $post_mimes = array();
    4423                 if ( is_numeric($mime) ) {
    4424                         $mime = (int) $mime;
    4425                         if ( $post = get_post( $mime ) ) {
    4426                                 $post_id = (int) $post->ID;
    4427                                 $ext = preg_replace('/^.+?\.([^.]+)$/', '$1', $post->guid);
    4428                                 if ( !empty($ext) ) {
    4429                                         $post_mimes[] = $ext;
    4430                                         if ( $ext_type = wp_ext2type( $ext ) )
    4431                                                 $post_mimes[] = $ext_type;
    4432                                 }
    4433                                 $mime = $post->post_mime_type;
    4434                         } else {
    4435                                 $mime = 0;
    4436                         }
    4437                 } else {
    4438                         $post_mimes[] = $mime;
    4439                 }
    4440 
    4441                 $icon_files = wp_cache_get('icon_files');
    4442 
    4443                 if ( !is_array($icon_files) ) {
    4444                         $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
    4445                         $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url('images/crystal') );
    4446                         $dirs = apply_filters( 'icon_dirs', array($icon_dir => $icon_dir_uri) );
    4447                         $icon_files = array();
    4448                         while ( $dirs ) {
    4449                                 $keys = array_keys( $dirs );
    4450                                 $dir = array_shift( $keys );
    4451                                 $uri = array_shift($dirs);
    4452                                 if ( $dh = opendir($dir) ) {
    4453                                         while ( false !== $file = readdir($dh) ) {
    4454                                                 $file = basename($file);
    4455                                                 if ( substr($file, 0, 1) == '.' )
    4456                                                         continue;
    4457                                                 if ( !in_array(strtolower(substr($file, -4)), array('.png', '.gif', '.jpg') ) ) {
    4458                                                         if ( is_dir("$dir/$file") )
    4459                                                                 $dirs["$dir/$file"] = "$uri/$file";
    4460                                                         continue;
    4461                                                 }
    4462                                                 $icon_files["$dir/$file"] = "$uri/$file";
    4463                                         }
    4464                                         closedir($dh);
    4465                                 }
    4466                         }
    4467                         wp_cache_add( 'icon_files', $icon_files, 'default', 600 );
    4468                 }
    4469 
    4470                 // Icon basename - extension = MIME wildcard
    4471                 foreach ( $icon_files as $file => $uri )
    4472                         $types[ preg_replace('/^([^.]*).*$/', '$1', basename($file)) ] =& $icon_files[$file];
    4473 
    4474                 if ( ! empty($mime) ) {
    4475                         $post_mimes[] = substr($mime, 0, strpos($mime, '/'));
    4476                         $post_mimes[] = substr($mime, strpos($mime, '/') + 1);
    4477                         $post_mimes[] = str_replace('/', '_', $mime);
    4478                 }
    4479 
    4480                 $matches = wp_match_mime_types(array_keys($types), $post_mimes);
    4481                 $matches['default'] = array('default');
    4482 
    4483                 foreach ( $matches as $match => $wilds ) {
    4484                         if ( isset($types[$wilds[0]])) {
    4485                                 $icon = $types[$wilds[0]];
    4486                                 if ( !is_numeric($mime) )
    4487                                         wp_cache_add("mime_type_icon_$mime", $icon);
    4488                                 break;
    4489                         }
    4490                 }
    4491         }
    4492 
    4493         return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id ); // Last arg is 0 if function pass mime type.
    4494 }
    4495 
    4496 /**
    4497  * Checked for changed slugs for published post objects and save the old slug.
    4498  *
    4499  * The function is used when a post object of any type is updated,
    4500  * by comparing the current and previous post objects.
    4501  *
    4502  * If the slug was changed and not already part of the old slugs then it will be
    4503  * added to the post meta field ('_wp_old_slug') for storing old slugs for that
    4504  * post.
    4505  *
    4506  * The most logically usage of this function is redirecting changed post objects, so
    4507  * that those that linked to an changed post will be redirected to the new post.
    4508  *
    4509  * @since 2.1.0
    4510  *
    4511  * @param int $post_id Post ID.
    4512  * @param object $post The Post Object
    4513  * @param object $post_before The Previous Post Object
    4514  * @return int Same as $post_id
    4515  */
    4516 function wp_check_for_changed_slugs($post_id, $post, $post_before) {
    4517         // dont bother if it hasnt changed
    4518         if ( $post->post_name == $post_before->post_name )
    4519                 return;
    4520 
    4521         // we're only concerned with published, non-hierarchical objects
    4522         if ( $post->post_status != 'publish' || is_post_type_hierarchical( $post->post_type ) )
    4523                 return;
    4524 
    4525         $old_slugs = (array) get_post_meta($post_id, '_wp_old_slug');
    4526 
    4527         // if we haven't added this old slug before, add it now
    4528         if ( !empty( $post_before->post_name ) && !in_array($post_before->post_name, $old_slugs) )
    4529                 wp_add_post_meta($post_id, '_wp_old_slug', $post_before->post_name);
    4530 
    4531         // if the new slug was used previously, delete it from the list
    4532         if ( in_array($post->post_name, $old_slugs) )
    4533                 delete_post_meta($post_id, '_wp_old_slug', $post->post_name);
    4534 }
    4535 
    4536 /**
    4537  * Retrieve the private post SQL based on capability.
    4538  *
    4539  * This function provides a standardized way to appropriately select on the
    4540  * post_status of a post type. The function will return a piece of SQL code
    4541  * that can be added to a WHERE clause; this SQL is constructed to allow all
    4542  * published posts, and all private posts to which the user has access.
    4543  *
    4544  * @since 2.2.0
    4545  *
    4546  * @uses $user_ID
    4547  *
    4548  * @param string $post_type currently only supports 'post' or 'page'.
    4549  * @return string SQL code that can be added to a where clause.
    4550  */
    4551 function get_private_posts_cap_sql( $post_type ) {
    4552         return get_posts_by_author_sql( $post_type, false );
    4553 }
    4554 
    4555 /**
    4556  * Retrieve the post SQL based on capability, author, and type.
    4557  *
    4558  * @see get_private_posts_cap_sql() for full description.
    4559  *
    4560  * @since 3.0.0
    4561  * @param string $post_type Post type.
    4562  * @param bool $full Optional. Returns a full WHERE statement instead of just an 'andalso' term.
    4563  * @param int $post_author Optional. Query posts having a single author ID.
    4564  * @param bool $public_only Optional. Only return public posts. Skips cap checks for $current_user.  Default is false.
    4565  * @return string SQL WHERE code that can be added to a query.
    4566  */
    4567 function get_posts_by_author_sql( $post_type, $full = true, $post_author = null, $public_only = false ) {
    4568         global $user_ID, $wpdb;
    4569 
    4570         // Private posts
    4571         $post_type_obj = get_post_type_object( $post_type );
    4572         if ( ! $post_type_obj )
    4573                 return $full ? 'WHERE 1 = 0' : ' 1 = 0 ';
    4574 
    4575         // This hook is deprecated. Why you'd want to use it, I dunno.
    4576         if ( ! $cap = apply_filters( 'pub_priv_sql_capability', '' ) )
    4577                 $cap = $post_type_obj->cap->read_private_posts;
    4578 
    4579         if ( $full ) {
    4580                 if ( null === $post_author ) {
    4581                         $sql = $wpdb->prepare( 'WHERE post_type = %s AND ', $post_type );
    4582                 } else {
    4583                         $sql = $wpdb->prepare( 'WHERE post_author = %d AND post_type = %s AND ', $post_author, $post_type );
    4584                 }
    4585         } else {
    4586                 $sql = '';
    4587         }
    4588 
    4589         $sql .= "(post_status = 'publish'";
    4590 
    4591         // Only need to check the cap if $public_only is false
    4592         if ( false === $public_only ) {
    4593                 if ( current_user_can( $cap ) ) {
    4594                         // Does the user have the capability to view private posts? Guess so.
    4595                         $sql .= " OR post_status = 'private'";
    4596                 } elseif ( is_user_logged_in() ) {
    4597                         // Users can view their own private posts.
    4598                         $id = (int) $user_ID;
    4599                         if ( null === $post_author || ! $full ) {
    4600                                 $sql .= " OR post_status = 'private' AND post_author = $id";
    4601                         } elseif ( $id == (int) $post_author ) {
    4602                                 $sql .= " OR post_status = 'private'";
    4603                         } // else none
    4604                 } // else none
    4605         }
    4606 
    4607         $sql .= ')';
    4608 
    4609         return $sql;
    4610 }
    4611 
    4612 /**
    4613  * Retrieve the date that the last post was published.
    4614  *
    4615  * The server timezone is the default and is the difference between GMT and
    4616  * server time. The 'blog' value is the date when the last post was posted. The
    4617  * 'gmt' is when the last post was posted in GMT formatted date.
    4618  *
    4619  * @since 0.71
    4620  *
    4621  * @uses apply_filters() Calls 'get_lastpostdate' filter
    4622  *
    4623  * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
    4624  * @return string The date of the last post.
    4625  */
    4626 function get_lastpostdate($timezone = 'server') {
    4627         return apply_filters( 'get_lastpostdate', _get_last_post_time( $timezone, 'date' ), $timezone );
    4628 }
    4629 
    4630 /**
    4631  * Retrieve last post modified date depending on timezone.
    4632  *
    4633  * The server timezone is the default and is the difference between GMT and
    4634  * server time. The 'blog' value is just when the last post was modified. The
    4635  * 'gmt' is when the last post was modified in GMT time.
    4636  *
    4637  * @since 1.2.0
    4638  * @uses apply_filters() Calls 'get_lastpostmodified' filter
    4639  *
    4640  * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
    4641  * @return string The date the post was last modified.
    4642  */
    4643 function get_lastpostmodified($timezone = 'server') {
    4644         $lastpostmodified = _get_last_post_time( $timezone, 'modified' );
    4645 
    4646         $lastpostdate = get_lastpostdate($timezone);
    4647         if ( $lastpostdate > $lastpostmodified )
    4648                 $lastpostmodified = $lastpostdate;
    4649 
    4650         return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
    4651 }
    4652 
    4653 /**
    4654  * Retrieve latest post date data based on timezone.
    4655  *
    4656  * @access private
    4657  * @since 3.1.0
    4658  *
    4659  * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
    4660  * @param string $field Field to check. Can be 'date' or 'modified'.
    4661  * @return string The date.
    4662  */
    4663 function _get_last_post_time( $timezone, $field ) {
    4664         global $wpdb;
    4665 
    4666         if ( !in_array( $field, array( 'date', 'modified' ) ) )
    4667                 return false;
    4668 
    4669         $timezone = strtolower( $timezone );
    4670 
    4671         $key = "lastpost{$field}:$timezone";
    4672 
    4673         $date = wp_cache_get( $key, 'timeinfo' );
    4674 
    4675         if ( !$date ) {
    4676                 $add_seconds_server = date('Z');
    4677 
    4678                 $post_types = get_post_types( array( 'public' => true ) );
    4679                 array_walk( $post_types, array( &$wpdb, 'escape_by_ref' ) );
    4680                 $post_types = "'" . implode( "', '", $post_types ) . "'";
    4681 
    4682                 switch ( $timezone ) {
    4683                         case 'gmt':
    4684                                 $date = $wpdb->get_var("SELECT post_{$field}_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
    4685                                 break;
    4686                         case 'blog':
    4687                                 $date = $wpdb->get_var("SELECT post_{$field} FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
    4688                                 break;
    4689                         case 'server':
    4690                                 $date = $wpdb->get_var("SELECT DATE_ADD(post_{$field}_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
    4691                                 break;
    4692                 }
    4693 
    4694                 if ( $date )
    4695                         wp_cache_set( $key, $date, 'timeinfo' );
    4696         }
    4697 
    4698         return $date;
    4699 }
    4700 
    4701 /**
    4702  * Updates posts in cache.
    4703  *
    4704  * @package WordPress
    4705  * @subpackage Cache
    4706  * @since 1.5.1
    4707  *
    4708  * @param array $posts Array of post objects
    4709  */
    4710 function update_post_cache( &$posts ) {
    4711         if ( ! $posts )
    4712                 return;
    4713 
    4714         foreach ( $posts as $post )
    4715                 wp_cache_add( $post->ID, $post, 'posts' );
    4716 }
    4717 
    4718 /**
    4719  * Will clean the post in the cache.
    4720  *
    4721  * Cleaning means delete from the cache of the post. Will call to clean the term
    4722  * object cache associated with the post ID.
    4723  *
    4724  * This function not run if $_wp_suspend_cache_invalidation is not empty. See
    4725  * wp_suspend_cache_invalidation().
    4726  *
    4727  * @package WordPress
    4728  * @subpackage Cache
    4729  * @since 2.0.0
    4730  *
    4731  * @uses do_action() Calls 'clean_post_cache' on $id before adding children (if any).
    4732  *
    4733  * @param object|int $post The post object or ID to remove from the cache
    4734  */
    4735 function clean_post_cache( $post ) {
    4736         global $_wp_suspend_cache_invalidation, $wpdb;
    4737 
    4738         if ( ! empty( $_wp_suspend_cache_invalidation ) )
    4739                 return;
    4740 
    4741         $post = get_post( $post );
    4742         if ( empty( $post ) )
    4743                 return;
    4744 
    4745         wp_cache_delete( $post->ID, 'posts' );
    4746         wp_cache_delete( $post->ID, 'post_meta' );
    4747 
    4748         clean_object_term_cache( $post->ID, $post->post_type );
    4749 
    4750         wp_cache_delete( 'wp_get_archives', 'general' );
    4751 
    4752         do_action( 'clean_post_cache', $post->ID, $post );
    4753 
    4754         if ( is_post_type_hierarchical( $post->post_type ) )
    4755                 wp_cache_delete( 'get_pages', 'posts' );
    4756 
    4757         if ( 'page' == $post->post_type ) {
    4758                 wp_cache_delete( 'all_page_ids', 'posts' );
    4759                 do_action( 'clean_page_cache', $post->ID );
    4760         }
    4761 
    4762         wp_cache_set( 'last_changed', microtime(), 'posts' );
    4763 }
    4764 
    4765 /**
    4766  * Call major cache updating functions for list of Post objects.
    4767  *
    4768  * @package WordPress
    4769  * @subpackage Cache
    4770  * @since 1.5.0
    4771  *
    4772  * @uses $wpdb
    4773  * @uses update_post_cache()
    4774  * @uses update_object_term_cache()
    4775  * @uses update_postmeta_cache()
    4776  *
    4777  * @param array $posts Array of Post objects
    4778  * @param string $post_type The post type of the posts in $posts. Default is 'post'.
    4779  * @param bool $update_term_cache Whether to update the term cache. Default is true.
    4780  * @param bool $update_meta_cache Whether to update the meta cache. Default is true.
    4781  */
    4782 function update_post_caches(&$posts, $post_type = 'post', $update_term_cache = true, $update_meta_cache = true) {
    4783         // No point in doing all this work if we didn't match any posts.
    4784         if ( !$posts )
    4785                 return;
    4786 
    4787         update_post_cache($posts);
    4788 
    4789         $post_ids = array();
    4790         foreach ( $posts as $post )
    4791                 $post_ids[] = $post->ID;
    4792 
    4793         if ( ! $post_type )
    4794                 $post_type = 'any';
    4795 
    4796         if ( $update_term_cache ) {
    4797                 if ( is_array($post_type) ) {
    4798                         $ptypes = $post_type;
    4799                 } elseif ( 'any' == $post_type ) {
    4800                         // Just use the post_types in the supplied posts.
    4801                         foreach ( $posts as $post )
    4802                                 $ptypes[] = $post->post_type;
    4803                         $ptypes = array_unique($ptypes);
    4804                 } else {
    4805                         $ptypes = array($post_type);
    4806                 }
    4807 
    4808                 if ( ! empty($ptypes) )
    4809                         update_object_term_cache($post_ids, $ptypes);
    4810         }
    4811 
    4812         if ( $update_meta_cache )
    4813                 update_postmeta_cache($post_ids);
    4814 }
    4815 
    4816 /**
    4817  * Updates metadata cache for list of post IDs.
    4818  *
    4819  * Performs SQL query to retrieve the metadata for the post IDs and updates the
    4820  * metadata cache for the posts. Therefore, the functions, which call this
    4821  * function, do not need to perform SQL queries on their own.
    4822  *
    4823  * @package WordPress
    4824  * @subpackage Cache
    4825  * @since 2.1.0
    4826  *
    4827  * @uses $wpdb
    4828  *
    4829  * @param array $post_ids List of post IDs.
    4830  * @return bool|array Returns false if there is nothing to update or an array of metadata.
    4831  */
    4832 function update_postmeta_cache($post_ids) {
    4833         return update_meta_cache('post', $post_ids);
    4834 }
    4835 
    4836 /**
    4837  * Will clean the attachment in the cache.
    4838  *
    4839  * Cleaning means delete from the cache. Optionally will clean the term
    4840  * object cache associated with the attachment ID.
    4841  *
    4842  * This function will not run if $_wp_suspend_cache_invalidation is not empty. See
    4843  * wp_suspend_cache_invalidation().
    4844  *
    4845  * @package WordPress
    4846  * @subpackage Cache
    4847  * @since 3.0.0
    4848  *
    4849  * @uses do_action() Calls 'clean_attachment_cache' on $id.
    4850  *
    4851  * @param int $id The attachment ID in the cache to clean
    4852  * @param bool $clean_terms optional. Whether to clean terms cache
    4853  */
    4854 function clean_attachment_cache($id, $clean_terms = false) {
    4855         global $_wp_suspend_cache_invalidation;
    4856 
    4857         if ( !empty($_wp_suspend_cache_invalidation) )
    4858                 return;
    4859 
    4860         $id = (int) $id;
    4861 
    4862         wp_cache_delete($id, 'posts');
    4863         wp_cache_delete($id, 'post_meta');
    4864 
    4865         if ( $clean_terms )
    4866                 clean_object_term_cache($id, 'attachment');
    4867 
    4868         do_action('clean_attachment_cache', $id);
    4869 }
    4870 
    4871 //
    4872 // Hooks
    4873 //
    4874 
    4875 /**
    4876  * Hook for managing future post transitions to published.
    4877  *
    4878  * @since 2.3.0
    4879  * @access private
    4880  * @uses $wpdb
    4881  * @uses do_action() Calls 'private_to_published' on post ID if this is a 'private_to_published' call.
    4882  * @uses wp_clear_scheduled_hook() with 'publish_future_post' and post ID.
    4883  *
    4884  * @param string $new_status New post status
    4885  * @param string $old_status Previous post status
    4886  * @param object $post Object type containing the post information
    4887  */
    4888 function _transition_post_status($new_status, $old_status, $post) {
    4889         global $wpdb;
    4890 
    4891         if ( $old_status != 'publish' && $new_status == 'publish' ) {
    4892                 // Reset GUID if transitioning to publish and it is empty
    4893                 if ( '' == get_the_guid($post->ID) )
    4894                         $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
    4895                 do_action('private_to_published', $post->ID);  // Deprecated, use private_to_publish
    4896         }
    4897 
    4898         // If published posts changed clear the lastpostmodified cache
    4899         if ( 'publish' == $new_status || 'publish' == $old_status) {
    4900                 foreach ( array( 'server', 'gmt', 'blog' ) as $timezone ) {
    4901                         wp_cache_delete( "lastpostmodified:$timezone", 'timeinfo' );
    4902                         wp_cache_delete( "lastpostdate:$timezone", 'timeinfo' );
    4903                 }
    4904         }
    4905 
    4906         // Always clears the hook in case the post status bounced from future to draft.
    4907         wp_clear_scheduled_hook('publish_future_post', array( $post->ID ) );
    4908 }
    4909 
    4910 /**
    4911  * Hook used to schedule publication for a post marked for the future.
    4912  *
    4913  * The $post properties used and must exist are 'ID' and 'post_date_gmt'.
    4914  *
    4915  * @since 2.3.0
    4916  * @access private
    4917  *
    4918  * @param int $deprecated Not used. Can be set to null. Never implemented.
    4919  *   Not marked as deprecated with _deprecated_argument() as it conflicts with
    4920  *   wp_transition_post_status() and the default filter for _future_post_hook().
    4921  * @param object $post Object type containing the post information
    4922  */
    4923 function _future_post_hook( $deprecated = '', $post ) {
    4924         wp_clear_scheduled_hook( 'publish_future_post', array( $post->ID ) );
    4925         wp_schedule_single_event( strtotime( get_gmt_from_date( $post->post_date ) . ' GMT') , 'publish_future_post', array( $post->ID ) );
    4926 }
    4927 
    4928 /**
    4929  * Hook to schedule pings and enclosures when a post is published.
    4930  *
    4931  * @since 2.3.0
    4932  * @access private
    4933  * @uses XMLRPC_REQUEST and WP_IMPORTING constants.
    4934  * @uses do_action() Calls 'xmlrpc_publish_post' on post ID if XMLRPC_REQUEST is defined.
    4935  *
    4936  * @param int $post_id The ID in the database table of the post being published
    4937  */
    4938 function _publish_post_hook($post_id) {
    4939         if ( defined('XMLRPC_REQUEST') )
    4940                 do_action('xmlrpc_publish_post', $post_id);
    4941 
    4942         if ( defined('WP_IMPORTING') )
    4943                 return;
    4944 
    4945         if ( get_option('default_pingback_flag') )
    4946                 wp_add_post_meta( $post_id, '_pingme', '1' );
    4947         wp_add_post_meta( $post_id, '_encloseme', '1' );
    4948 
    4949         wp_schedule_single_event(time(), 'do_pings');
    4950 }
     3 * Post revision functions.
     4 *
     5 * @package WordPress
     6 * @subpackage Post_Revisions
     7 */
    49518
    49529/**
     
    5359416        }
    5360417}
    5361 
    5362 /**
    5363  * Returns the post's parent's post_ID
    5364  *
    5365  * @since 3.1.0
    5366  *
    5367  * @param int $post_id
    5368  *
    5369  * @return int|bool false on error
    5370  */
    5371 function wp_get_post_parent_id( $post_ID ) {
    5372         $post = get_post( $post_ID );
    5373         if ( !$post || is_wp_error( $post ) )
    5374                 return false;
    5375         return (int) $post->post_parent;
    5376 }
    5377 
    5378 /**
    5379  * Checks the given subset of the post hierarchy for hierarchy loops.
    5380  * Prevents loops from forming and breaks those that it finds.
    5381  *
    5382  * Attached to the wp_insert_post_parent filter.
    5383  *
    5384  * @since 3.1.0
    5385  * @uses wp_find_hierarchy_loop()
    5386  *
    5387  * @param int $post_parent ID of the parent for the post we're checking.
    5388  * @param int $post_ID ID of the post we're checking.
    5389  *
    5390  * @return int The new post_parent for the post.
    5391  */
    5392 function wp_check_post_hierarchy_for_loops( $post_parent, $post_ID ) {
    5393         // Nothing fancy here - bail
    5394         if ( !$post_parent )
    5395                 return 0;
    5396 
    5397         // New post can't cause a loop
    5398         if ( empty( $post_ID ) )
    5399                 return $post_parent;
    5400 
    5401         // Can't be its own parent
    5402         if ( $post_parent == $post_ID )
    5403                 return 0;
    5404 
    5405         // Now look for larger loops
    5406 
    5407         if ( !$loop = wp_find_hierarchy_loop( 'wp_get_post_parent_id', $post_ID, $post_parent ) )
    5408                 return $post_parent; // No loop
    5409 
    5410         // Setting $post_parent to the given value causes a loop
    5411         if ( isset( $loop[$post_ID] ) )
    5412                 return 0;
    5413 
    5414         // There's a loop, but it doesn't contain $post_ID. Break the loop.
    5415         foreach ( array_keys( $loop ) as $loop_member )
    5416                 wp_update_post( array( 'ID' => $loop_member, 'post_parent' => 0 ) );
    5417 
    5418         return $post_parent;
    5419 }
    5420 
    5421 /**
    5422  * Returns an array of post format slugs to their translated and pretty display versions
    5423  *
    5424  * @since 3.1.0
    5425  *
    5426  * @return array The array of translations
    5427  */
    5428 function get_post_format_strings() {
    5429         $strings = array(
    5430                 'standard' => _x( 'Standard', 'Post format' ), // Special case. any value that evals to false will be considered standard
    5431                 'aside'    => _x( 'Aside',    'Post format' ),
    5432                 'chat'     => _x( 'Chat',     'Post format' ),
    5433                 'gallery'  => _x( 'Gallery',  'Post format' ),
    5434                 'link'     => _x( 'Link',     'Post format' ),
    5435                 'image'    => _x( 'Image',    'Post format' ),
    5436                 'quote'    => _x( 'Quote',    'Post format' ),
    5437                 'status'   => _x( 'Status',   'Post format' ),
    5438                 'video'    => _x( 'Video',    'Post format' ),
    5439                 'audio'    => _x( 'Audio',    'Post format' ),
    5440         );
    5441         return $strings;
    5442 }
    5443 
    5444 /**
    5445  * Retrieves an array of post format slugs.
    5446  *
    5447  * @since 3.1.0
    5448  *
    5449  * @return array The array of post format slugs.
    5450  */
    5451 function get_post_format_slugs() {
    5452         $slugs = array_keys( get_post_format_strings() );
    5453         return array_combine( $slugs, $slugs );
    5454 }
    5455 
    5456 /**
    5457  * Returns a pretty, translated version of a post format slug
    5458  *
    5459  * @since 3.1.0
    5460  *
    5461  * @param string $slug A post format slug
    5462  * @return string The translated post format name
    5463  */
    5464 function get_post_format_string( $slug ) {
    5465         $strings = get_post_format_strings();
    5466         if ( !$slug )
    5467                 return $strings['standard'];
    5468         else
    5469                 return ( isset( $strings[$slug] ) ) ? $strings[$slug] : '';
    5470 }
    5471 
    5472 /**
    5473  * Sets a post thumbnail.
    5474  *
    5475  * @since 3.1.0
    5476  *
    5477  * @param int|object $post Post ID or object where thumbnail should be attached.
    5478  * @param int $thumbnail_id Thumbnail to attach.
    5479  * @return bool True on success, false on failure.
    5480  */
    5481 function set_post_thumbnail( $post, $thumbnail_id ) {
    5482         $post = get_post( $post );
    5483         $thumbnail_id = absint( $thumbnail_id );
    5484         if ( $post && $thumbnail_id && get_post( $thumbnail_id ) ) {
    5485                 if ( $thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'thumbnail' ) )
    5486                         return wp_update_post_meta( $post->ID, '_thumbnail_id', $thumbnail_id );
    5487                 else
    5488                         return delete_post_meta( $post->ID, '_thumbnail_id' );
    5489         }
    5490         return false;
    5491 }
    5492 
    5493 /**
    5494  * Removes a post thumbnail.
    5495  *
    5496  * @since 3.3.0
    5497  *
    5498  * @param int|object $post Post ID or object where thumbnail should be removed from.
    5499  * @return bool True on success, false on failure.
    5500  */
    5501 function delete_post_thumbnail( $post ) {
    5502         $post = get_post( $post );
    5503         if ( $post )
    5504                 return delete_post_meta( $post->ID, '_thumbnail_id' );
    5505         return false;
    5506 }
    5507 
    5508 /**
    5509  * Returns a link to a post format index.
    5510  *
    5511  * @since 3.1.0
    5512  *
    5513  * @param string $format Post format
    5514  * @return string Link
    5515  */
    5516 function get_post_format_link( $format ) {
    5517         $term = get_term_by('slug', 'post-format-' . $format, 'post_format' );
    5518         if ( ! $term || is_wp_error( $term ) )
    5519                 return false;
    5520         return get_term_link( $term );
    5521 }
    5522 
    5523 /**
    5524  * Deletes auto-drafts for new posts that are > 7 days old
    5525  *
    5526  * @since 3.4.0
    5527  */
    5528 function wp_delete_auto_drafts() {
    5529         global $wpdb;
    5530 
    5531         // Cleanup old auto-drafts more than 7 days old
    5532         $old_posts = $wpdb->get_col( "SELECT ID FROM $wpdb->posts WHERE post_status = 'auto-draft' AND DATE_SUB( NOW(), INTERVAL 7 DAY ) > post_date" );
    5533         foreach ( (array) $old_posts as $delete )
    5534                 wp_delete_post( $delete, true ); // Force delete
    5535 }
    5536 
    5537 /**
    5538  * Filters the request to allow for the format prefix.
    5539  *
    5540  * @access private
    5541  * @since 3.1.0
    5542  */
    5543 function _post_format_request( $qvs ) {
    5544         if ( ! isset( $qvs['post_format'] ) )
    5545                 return $qvs;
    5546         $slugs = get_post_format_slugs();
    5547         if ( isset( $slugs[ $qvs['post_format'] ] ) )
    5548                 $qvs['post_format'] = 'post-format-' . $slugs[ $qvs['post_format'] ];
    5549         $tax = get_taxonomy( 'post_format' );
    5550         if ( ! is_admin() )
    5551                 $qvs['post_type'] = $tax->object_type;
    5552         return $qvs;
    5553 }
    5554 add_filter( 'request', '_post_format_request' );
    5555 
    5556 /**
    5557  * Filters the post format term link to remove the format prefix.
    5558  *
    5559  * @access private
    5560  * @since 3.1.0
    5561  */
    5562 function _post_format_link( $link, $term, $taxonomy ) {
    5563         global $wp_rewrite;
    5564         if ( 'post_format' != $taxonomy )
    5565                 return $link;
    5566         if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) {
    5567                 return str_replace( "/{$term->slug}", '/' . str_replace( 'post-format-', '', $term->slug ), $link );
    5568         } else {
    5569                 $link = remove_query_arg( 'post_format', $link );
    5570                 return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link );
    5571         }
    5572 }
    5573 add_filter( 'term_link', '_post_format_link', 10, 3 );
    5574 
    5575 /**
    5576  * Remove the post format prefix from the name property of the term object created by get_term().
    5577  *
    5578  * @access private
    5579  * @since 3.1.0
    5580  */
    5581 function _post_format_get_term( $term ) {
    5582         if ( isset( $term->slug ) ) {
    5583                 $term->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
    5584         }
    5585         return $term;
    5586 }
    5587 add_filter( 'get_post_format', '_post_format_get_term' );
    5588 
    5589 /**
    5590  * Remove the post format prefix from the name property of the term objects created by get_terms().
    5591  *
    5592  * @access private
    5593  * @since 3.1.0
    5594  */
    5595 function _post_format_get_terms( $terms, $taxonomies, $args ) {
    5596         if ( in_array( 'post_format', (array) $taxonomies ) ) {
    5597                 if ( isset( $args['fields'] ) && 'names' == $args['fields'] ) {
    5598                         foreach( $terms as $order => $name ) {
    5599                                 $terms[$order] = get_post_format_string( str_replace( 'post-format-', '', $name ) );
    5600                         }
    5601                 } else {
    5602                         foreach ( (array) $terms as $order => $term ) {
    5603                                 if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
    5604                                         $terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
    5605                                 }
    5606                         }
    5607                 }
    5608         }
    5609         return $terms;
    5610 }
    5611 add_filter( 'get_terms', '_post_format_get_terms', 10, 3 );
    5612 
    5613 /**
    5614  * Remove the post format prefix from the name property of the term objects created by wp_get_object_terms().
    5615  *
    5616  * @access private
    5617  * @since 3.1.0
    5618  */
    5619 function _post_format_wp_get_object_terms( $terms ) {
    5620         foreach ( (array) $terms as $order => $term ) {
    5621                 if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
    5622                         $terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
    5623                 }
    5624         }
    5625         return $terms;
    5626 }
    5627 add_filter( 'wp_get_object_terms', '_post_format_wp_get_object_terms' );
    5628 
    5629 /**
    5630  * Update the custom taxonomies' term counts when a post's status is changed. For example, default posts term counts (for custom taxonomies) don't include private / draft posts.
    5631  *
    5632  * @access private
    5633  * @param string $new_status
    5634  * @param string $old_status
    5635  * @param object $post
    5636  * @since 3.3.0
    5637  */
    5638 function _update_term_count_on_transition_post_status( $new_status, $old_status, $post ) {
    5639         // Update counts for the post's terms.
    5640         foreach ( (array) get_object_taxonomies( $post->post_type ) as $taxonomy ) {
    5641                 $tt_ids = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'tt_ids' ) );
    5642                 wp_update_term_count( $tt_ids, $taxonomy );
    5643         }
    5644 }
    5645 
    5646 /**
    5647  * Adds any posts from the given ids to the cache that do not already exist in cache
    5648  *
    5649  * @since 3.4.0
    5650  *
    5651  * @access private
    5652  *
    5653  * @param array $post_ids ID list
    5654  * @param bool $update_term_cache Whether to update the term cache. Default is true.
    5655  * @param bool $update_meta_cache Whether to update the meta cache. Default is true.
    5656  */
    5657 function _prime_post_caches( $ids, $update_term_cache = true, $update_meta_cache = true ) {
    5658         global $wpdb;
    5659 
    5660         $non_cached_ids = _get_non_cached_ids( $ids, 'posts' );
    5661         if ( !empty( $non_cached_ids ) ) {
    5662                 $fresh_posts = $wpdb->get_results( sprintf( "SELECT $wpdb->posts.* FROM $wpdb->posts WHERE ID IN (%s)", join( ",", $non_cached_ids ) ) );
    5663 
    5664                 update_post_caches( $fresh_posts, 'any', $update_term_cache, $update_meta_cache );
    5665         }
    5666 }
  • trunk/wp-settings.php

    r23265 r23466  
    118118require( ABSPATH . WPINC . '/post.php' );
    119119require( ABSPATH . WPINC . '/post-template.php' );
     120require( ABSPATH . WPINC . '/revision.php' );
     121require( ABSPATH . WPINC . '/post-formats.php' );
    120122require( ABSPATH . WPINC . '/post-thumbnail-template.php' );
    121123require( ABSPATH . WPINC . '/category.php' );
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