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Changeset 33751

Timestamp:

08/26/2015 04:41:29 AM (10 years ago)

Author:

wonderboymusic

Message:

Rewrite: move WP_Rewrite into its own file. rewrite.php loads the new files, so this is 100% BC if someone is loading rewrite.php directly. New files created using svn cp.

The rewrite functions have all kinds of cross-dependencies (like WP_Query), so loading the file by itself would have been bizarre (and still is).

Creates:
rewrite-constants.php
rewrite-functions.php
class-wp-rewrite.php

rewrite.php contains only top-level code. Class file only contains the class. Functions file only contains functions.

See #33413.

Location:

trunk/src/wp-includes

Files:

: 1 edited
: 3 copied

class-wp-rewrite.php (copied) (copied from trunk/src/wp-includes/rewrite.php) (2 diffs)
rewrite-constants.php (copied) (copied from trunk/src/wp-includes/rewrite.php) (2 diffs)
rewrite-functions.php (copied) (copied from trunk/src/wp-includes/rewrite.php) (2 diffs)
rewrite.php (modified) (1 diff)

Legend:

: Unmodified
: Added
: Removed

trunk/src/wp-includes/class-wp-rewrite.php

-                      r33746
+                      r33751
 <?php
-/**
- * WordPress Rewrite API
+ *
- * @package WordPress
- * @subpackage Rewrite
- */
-/**
- * Add a straight rewrite rule.
+ *
- * @since 2.1.0
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param string $regex    Regular Expression to match request against.
- * @param string $redirect Page to redirect to.
- * @param string $after    Optional, default is 'bottom'. Where to add rule, can also be 'top'.
- */
-function add_rewrite_rule($regex, $redirect, $after = 'bottom') {
-    global $wp_rewrite;
-    $wp_rewrite->add_rule($regex, $redirect, $after);
+}
-/**
- * Add a new rewrite tag (like %postname%).
+ *
- * The $query parameter is optional. If it is omitted you must ensure that
- * you call this on, or before, the 'init' hook. This is because $query defaults
- * to "$tag=", and for this to work a new query var has to be added.
+ *
- * @since 2.1.0
+ *
- * @global WP_Rewrite $wp_rewrite
- * @global WP         $wp
+ *
- * @param string $tag   Name of the new rewrite tag.
- * @param string $regex Regular expression to substitute the tag for in rewrite rules.
- * @param string $query String to append to the rewritten query. Must end in '='. Optional.
- */
-function add_rewrite_tag( $tag, $regex, $query = '' ) {
-    // validate the tag's name
-    if ( strlen( $tag ) < 3 || $tag[0] != '%' || $tag[ strlen($tag) - 1 ] != '%' )
-        return;
-    global $wp_rewrite, $wp;
-    if ( empty( $query ) ) {
-        $qv = trim( $tag, '%' );
-        $wp->add_query_var( $qv );
-        $query = $qv . '=';
+    }
-    $wp_rewrite->add_rewrite_tag( $tag, $regex, $query );
+}
-/**
- * Add permalink structure.
+ *
- * @since 3.0.0
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param string $name   Name for permalink structure.
- * @param string $struct Permalink structure.
- * @param array  $args   Optional configuration for building the rules from the permalink structure,
- *                       see {@link WP_Rewrite::add_permastruct()} for full details.
- */
-function add_permastruct( $name, $struct, $args = array() ) {
-    global $wp_rewrite;
-    // backwards compatibility for the old parameters: $with_front and $ep_mask
-    if ( ! is_array( $args ) )
-        $args = array( 'with_front' => $args );
-    if ( func_num_args() == 4 )
-        $args['ep_mask'] = func_get_arg( 3 );
-    $wp_rewrite->add_permastruct( $name, $struct, $args );
+}
-/**
- * Add a new feed type like /atom1/.
+ *
- * @since 2.1.0
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param string   $feedname
- * @param callback $function Callback to run on feed display.
- * @return string Feed action name.
- */
-function add_feed($feedname, $function) {
-    global $wp_rewrite;
-    if ( ! in_array($feedname, $wp_rewrite->feeds) ) //override the file if it is
-        $wp_rewrite->feeds[] = $feedname;
-    $hook = 'do_feed_' . $feedname;
-    // Remove default function hook
-    remove_action($hook, $hook);
-    add_action($hook, $function, 10, 1);
-    return $hook;
+}
-/**
- * Remove rewrite rules and then recreate rewrite rules.
+ *
- * @since 3.0.0
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param bool $hard Whether to update .htaccess (hard flush) or just update
- *                   rewrite_rules transient (soft flush). Default is true (hard).
- */
-function flush_rewrite_rules( $hard = true ) {
-    global $wp_rewrite;
-    $wp_rewrite->flush_rules( $hard );
+}
-/**
- * Endpoint Mask for default, which is nothing.
+ *
- * @since 2.1.0
- */
-define('EP_NONE', 0);
-/**
- * Endpoint Mask for Permalink.
+ *
- * @since 2.1.0
- */
-define('EP_PERMALINK', 1);
-/**
- * Endpoint Mask for Attachment.
+ *
- * @since 2.1.0
- */
-define('EP_ATTACHMENT', 2);
-/**
- * Endpoint Mask for date.
+ *
- * @since 2.1.0
- */
-define('EP_DATE', 4);
-/**
- * Endpoint Mask for year
+ *
- * @since 2.1.0
- */
-define('EP_YEAR', 8);
-/**
- * Endpoint Mask for month.
+ *
- * @since 2.1.0
- */
-define('EP_MONTH', 16);
-/**
- * Endpoint Mask for day.
+ *
- * @since 2.1.0
- */
-define('EP_DAY', 32);
-/**
- * Endpoint Mask for root.
+ *
- * @since 2.1.0
- */
-define('EP_ROOT', 64);
-/**
- * Endpoint Mask for comments.
+ *
- * @since 2.1.0
- */
-define('EP_COMMENTS', 128);
-/**
- * Endpoint Mask for searches.
+ *
- * @since 2.1.0
- */
-define('EP_SEARCH', 256);
-/**
- * Endpoint Mask for categories.
+ *
- * @since 2.1.0
- */
-define('EP_CATEGORIES', 512);
-/**
- * Endpoint Mask for tags.
+ *
- * @since 2.3.0
- */
-define('EP_TAGS', 1024);
-/**
- * Endpoint Mask for authors.
+ *
- * @since 2.1.0
- */
-define('EP_AUTHORS', 2048);
-/**
- * Endpoint Mask for pages.
+ *
- * @since 2.1.0
- */
-define('EP_PAGES', 4096);
-/**
- * Endpoint Mask for all archive views.
+ *
- * @since 3.7.0
- */
-define( 'EP_ALL_ARCHIVES', EP_DATE | EP_YEAR | EP_MONTH | EP_DAY | EP_CATEGORIES | EP_TAGS | EP_AUTHORS );
-/**
- * Endpoint Mask for everything.
+ *
- * @since 2.1.0
- */
-define( 'EP_ALL', EP_PERMALINK | EP_ATTACHMENT | EP_ROOT | EP_COMMENTS | EP_SEARCH | EP_PAGES | EP_ALL_ARCHIVES );
-/**
- * Add an endpoint, like /trackback/.
+ *
- * Adding an endpoint creates extra rewrite rules for each of the matching
- * places specified by the provided bitmask. For example:
+ *
- *     add_rewrite_endpoint( 'json', EP_PERMALINK | EP_PAGES );
+ *
- * will add a new rewrite rule ending with "json(/(.*))?/?$" for every permastruct
- * that describes a permalink (post) or page. This is rewritten to "json=$match"
- * where $match is the part of the URL matched by the endpoint regex (e.g. "foo" in
- * "[permalink]/json/foo/").
+ *
- * A new query var with the same name as the endpoint will also be created.
+ *
- * When specifying $places ensure that you are using the EP_* constants (or a
- * combination of them using the bitwise OR operator) as their values are not
- * guaranteed to remain static (especially `EP_ALL`).
+ *
- * Be sure to flush the rewrite rules - see flush_rewrite_rules() - when your plugin gets
- * activated and deactivated.
+ *
- * @since 2.1.0
- * @since 4.3.0 Added support for skipping query var registration by passing `false` to `$query_var`.
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param string      $name      Name of the endpoint.
- * @param int         $places    Endpoint mask describing the places the endpoint should be added.
- * @param string|bool $query_var Name of the corresponding query variable. Pass `false` to skip registering a query_var
- *                               for this endpoint. Defaults to the value of `$name`.
- */
-function add_rewrite_endpoint( $name, $places, $query_var = true ) {
-    global $wp_rewrite;
-    $wp_rewrite->add_endpoint( $name, $places, $query_var );
+}
-/**
- * Filter the URL base for taxonomies.
+ *
- * To remove any manually prepended /index.php/.
+ *
- * @access private
- * @since 2.6.0
+ *
- * @param string $base The taxonomy base that we're going to filter
- * @return string
- */
-function _wp_filter_taxonomy_base( $base ) {
-    if ( !empty( $base ) ) {
-        $base = preg_replace( '|^/index\.php/|', '', $base );
-        $base = trim( $base, '/' );
+    }
-    return $base;
+}
-/**
- * Resolve numeric slugs that collide with date permalinks.
+ *
- * Permalinks of posts with numeric slugs can sometimes look to WP_Query::parse_query()
- * like a date archive, as when your permalink structure is `/%year%/%postname%/` and
- * a post with post_name '05' has the URL `/2015/05/`.
+ *
- * This function detects conflicts of this type and resolves them in favor of the
- * post permalink.
+ *
- * Note that, since 4.3.0, wp_unique_post_slug() prevents the creation of post slugs
- * that would result in a date archive conflict. The resolution performed in this
- * function is primarily for legacy content, as well as cases when the admin has changed
- * the site's permalink structure in a way that introduces URL conflicts.
+ *
- * @since 4.3.0
+ *
- * @param array $query_vars Optional. Query variables for setting up the loop, as determined in
- *                          WP::parse_request(). Default empty array.
- * @return array Returns the original array of query vars, with date/post conflicts resolved.
- */
-function wp_resolve_numeric_slug_conflicts( $query_vars = array() ) {
-    if ( ! isset( $query_vars['year'] ) && ! isset( $query_vars['monthnum'] ) && ! isset( $query_vars['day'] ) ) {
-        return $query_vars;
+    }
-    // Identify the 'postname' position in the permastruct array.
-    $permastructs   = array_values( array_filter( explode( '/', get_option( 'permalink_structure' ) ) ) );
-    $postname_index = array_search( '%postname%', $permastructs );
-    if ( false === $postname_index ) {
-        return $query_vars;
+    }
-    /*
-     * A numeric slug could be confused with a year, month, or day, depending on position. To account for
-     * the possibility of post pagination (eg 2015/2 for the second page of a post called '2015'), our
-     * `is_*` checks are generous: check for year-slug clashes when `is_year` *or* `is_month`, and check
-     * for month-slug clashes when `is_month` *or* `is_day`.
-     */
-    $compare = '';
-    if ( 0 === $postname_index && ( isset( $query_vars['year'] ) || isset( $query_vars['monthnum'] ) ) ) {
-        $compare = 'year';
-    } elseif ( '%year%' === $permastructs[ $postname_index - 1 ] && ( isset( $query_vars['monthnum'] ) || isset( $query_vars['day'] ) ) ) {
-        $compare = 'monthnum';
-    } elseif ( '%monthnum%' === $permastructs[ $postname_index - 1 ] && isset( $query_vars['day'] ) ) {
-        $compare = 'day';
+    }
-    if ( ! $compare ) {
-        return $query_vars;
+    }
-    // This is the potentially clashing slug.
-    $value = $query_vars[ $compare ];
-    $post = get_page_by_path( $value, OBJECT, 'post' );
-    if ( ! ( $post instanceof WP_Post ) ) {
-        return $query_vars;
+    }
-    // If the date of the post doesn't match the date specified in the URL, resolve to the date archive.
-    if ( preg_match( '/^([0-9]{4})\-([0-9]{2})/', $post->post_date, $matches ) && isset( $query_vars['year'] ) && ( 'monthnum' === $compare || 'day' === $compare ) ) {
-        // $matches[1] is the year the post was published.
-        if ( intval( $query_vars['year'] ) !== intval( $matches[1] ) ) {
-            return $query_vars;
+        }
-        // $matches[2] is the month the post was published.
-        if ( 'day' === $compare && isset( $query_vars['monthnum'] ) && intval( $query_vars['monthnum'] ) !== intval( $matches[2] ) ) {
-            return $query_vars;
+        }
+    }
-    /*
-     * If the located post contains nextpage pagination, then the URL chunk following postname may be
-     * intended as the page number. Verify that it's a valid page before resolving to it.
-     */
-    $maybe_page = '';
-    if ( 'year' === $compare && isset( $query_vars['monthnum'] ) ) {
-        $maybe_page = $query_vars['monthnum'];
-    } elseif ( 'monthnum' === $compare && isset( $query_vars['day'] ) ) {
-        $maybe_page = $query_vars['day'];
+    }
-    $post_page_count = substr_count( $post->post_content, '<!--nextpage-->' ) + 1;
-    // If the post doesn't have multiple pages, but a 'page' candidate is found, resolve to the date archive.
-    if ( 1 === $post_page_count && $maybe_page ) {
-        return $query_vars;
+    }
-    // If the post has multiple pages and the 'page' number isn't valid, resolve to the date archive.
-    if ( $post_page_count > 1 && $maybe_page > $post_page_count ) {
-        return $query_vars;
+    }
-    // If we've gotten to this point, we have a slug/date clash. First, adjust for nextpage.
-    if ( '' !== $maybe_page ) {
-        $query_vars['page'] = intval( $maybe_page );
+    }
-    // Next, unset autodetected date-related query vars.
-    unset( $query_vars['year'] );
-    unset( $query_vars['monthnum'] );
-    unset( $query_vars['day'] );
-    // Then, set the identified post.
-    $query_vars['name'] = $post->post_name;
-    // Finally, return the modified query vars.
-    return $query_vars;
+}
-/**
- * Examine a url and try to determine the post ID it represents.
+ *
- * Checks are supposedly from the hosted site blog.
+ *
- * @since 1.0.0
+ *
- * @global WP_Rewrite $wp_rewrite
- * @global WP         $wp
+ *
- * @param string $url Permalink to check.
- * @return int Post ID, or 0 on failure.
- */
-function url_to_postid( $url ) {
-    global $wp_rewrite;
-    /**
-     * Filter the URL to derive the post ID from.
+     *
-     * @since 2.2.0
+     *
-     * @param string $url The URL to derive the post ID from.
-     */
-    $url = apply_filters( 'url_to_postid', $url );
-    // First, check to see if there is a 'p=N' or 'page_id=N' to match against
-    if ( preg_match('#[?&](p|page_id|attachment_id)=(\d+)#', $url, $values) )   {
-        $id = absint($values[2]);
-        if ( $id )
-            return $id;
+    }
-    // Check to see if we are using rewrite rules
-    $rewrite = $wp_rewrite->wp_rewrite_rules();
-    // Not using rewrite rules, and 'p=N' and 'page_id=N' methods failed, so we're out of options
-    if ( empty($rewrite) )
-        return 0;
-    // Get rid of the #anchor
-    $url_split = explode('#', $url);
-    $url = $url_split[0];
-    // Get rid of URL ?query=string
-    $url_split = explode('?', $url);
-    $url = $url_split[0];
-    // Add 'www.' if it is absent and should be there
-    if ( false !== strpos(home_url(), '://www.') && false === strpos($url, '://www.') )
-        $url = str_replace('://', '://www.', $url);
-    // Strip 'www.' if it is present and shouldn't be
-    if ( false === strpos(home_url(), '://www.') )
-        $url = str_replace('://www.', '://', $url);
-    // Strip 'index.php/' if we're not using path info permalinks
-    if ( !$wp_rewrite->using_index_permalinks() )
-        $url = str_replace( $wp_rewrite->index . '/', '', $url );
-    if ( false !== strpos( trailingslashit( $url ), home_url( '/' ) ) ) {
-        // Chop off http://domain.com/[path]
-        $url = str_replace(home_url(), '', $url);
-    } else {
-        // Chop off /path/to/blog
-        $home_path = parse_url( home_url( '/' ) );
-        $home_path = isset( $home_path['path'] ) ? $home_path['path'] : '' ;
-        $url = preg_replace( sprintf( '#^%s#', preg_quote( $home_path ) ), '', trailingslashit( $url ) );
+    }
-    // Trim leading and lagging slashes
-    $url = trim($url, '/');
-    $request = $url;
-    $post_type_query_vars = array();
-    foreach ( get_post_types( array() , 'objects' ) as $post_type => $t ) {
-        if ( ! empty( $t->query_var ) )
-            $post_type_query_vars[ $t->query_var ] = $post_type;
+    }
-    // Look for matches.
-    $request_match = $request;
-    foreach ( (array)$rewrite as $match => $query) {
-        // If the requesting file is the anchor of the match, prepend it
-        // to the path info.
-        if ( !empty($url) && ($url != $request) && (strpos($match, $url) === 0) )
-            $request_match = $url . '/' . $request;
-        if ( preg_match("#^$match#", $request_match, $matches) ) {
-            if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
-                // This is a verbose page match, let's check to be sure about it.
-                if ( ! get_page_by_path( $matches[ $varmatch[1] ] ) )
-                    continue;
+            }
-            // Got a match.
-            // Trim the query of everything up to the '?'.
-            $query = preg_replace("!^.+\?!", '', $query);
-            // Substitute the substring matches into the query.
-            $query = addslashes(WP_MatchesMapRegex::apply($query, $matches));
-            // Filter out non-public query vars
-            global $wp;
-            parse_str( $query, $query_vars );
-            $query = array();
-            foreach ( (array) $query_vars as $key => $value ) {
-                if ( in_array( $key, $wp->public_query_vars ) ){
-                    $query[$key] = $value;
-                    if ( isset( $post_type_query_vars[$key] ) ) {
-                        $query['post_type'] = $post_type_query_vars[$key];
-                        $query['name'] = $value;
+                    }
+                }
+            }
-            // Resolve conflicts between posts with numeric slugs and date archive queries.
-            $query = wp_resolve_numeric_slug_conflicts( $query );
-            // Do the query
-            $query = new WP_Query( $query );
-            if ( ! empty( $query->posts ) && $query->is_singular )
-                return $query->post->ID;
-            else
-                return 0;
+        }
+    }
-    return 0;
+}
 /**
  * WordPress Rewrite Component.
 …
+ *
  * @since 1.5.0
+ * @package WordPress
+ * @subpackage Rewrite
  */
 class WP_Rewrite {

trunk/src/wp-includes/rewrite-constants.php

-                      r33746
+                      r33751
  * @subpackage Rewrite
  */
-/**
- * Add a straight rewrite rule.
+ *
- * @since 2.1.0
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param string $regex    Regular Expression to match request against.
- * @param string $redirect Page to redirect to.
- * @param string $after    Optional, default is 'bottom'. Where to add rule, can also be 'top'.
- */
-function add_rewrite_rule($regex, $redirect, $after = 'bottom') {
-    global $wp_rewrite;
-    $wp_rewrite->add_rule($regex, $redirect, $after);
+}
-/**
- * Add a new rewrite tag (like %postname%).
+ *
- * The $query parameter is optional. If it is omitted you must ensure that
- * you call this on, or before, the 'init' hook. This is because $query defaults
- * to "$tag=", and for this to work a new query var has to be added.
+ *
- * @since 2.1.0
+ *
- * @global WP_Rewrite $wp_rewrite
- * @global WP         $wp
+ *
- * @param string $tag   Name of the new rewrite tag.
- * @param string $regex Regular expression to substitute the tag for in rewrite rules.
- * @param string $query String to append to the rewritten query. Must end in '='. Optional.
- */
-function add_rewrite_tag( $tag, $regex, $query = '' ) {
-    // validate the tag's name
-    if ( strlen( $tag ) < 3 || $tag[0] != '%' || $tag[ strlen($tag) - 1 ] != '%' )
-        return;
-    global $wp_rewrite, $wp;
-    if ( empty( $query ) ) {
-        $qv = trim( $tag, '%' );
-        $wp->add_query_var( $qv );
-        $query = $qv . '=';
+    }
-    $wp_rewrite->add_rewrite_tag( $tag, $regex, $query );
+}
-/**
- * Add permalink structure.
+ *
- * @since 3.0.0
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param string $name   Name for permalink structure.
- * @param string $struct Permalink structure.
- * @param array  $args   Optional configuration for building the rules from the permalink structure,
- *                       see {@link WP_Rewrite::add_permastruct()} for full details.
- */
-function add_permastruct( $name, $struct, $args = array() ) {
-    global $wp_rewrite;
-    // backwards compatibility for the old parameters: $with_front and $ep_mask
-    if ( ! is_array( $args ) )
-        $args = array( 'with_front' => $args );
-    if ( func_num_args() == 4 )
-        $args['ep_mask'] = func_get_arg( 3 );
-    $wp_rewrite->add_permastruct( $name, $struct, $args );
+}
-/**
- * Add a new feed type like /atom1/.
+ *
- * @since 2.1.0
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param string   $feedname
- * @param callback $function Callback to run on feed display.
- * @return string Feed action name.
- */
-function add_feed($feedname, $function) {
-    global $wp_rewrite;
-    if ( ! in_array($feedname, $wp_rewrite->feeds) ) //override the file if it is
-        $wp_rewrite->feeds[] = $feedname;
-    $hook = 'do_feed_' . $feedname;
-    // Remove default function hook
-    remove_action($hook, $hook);
-    add_action($hook, $function, 10, 1);
-    return $hook;
+}
-/**
- * Remove rewrite rules and then recreate rewrite rules.
+ *
- * @since 3.0.0
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param bool $hard Whether to update .htaccess (hard flush) or just update
- *                   rewrite_rules transient (soft flush). Default is true (hard).
- */
-function flush_rewrite_rules( $hard = true ) {
-    global $wp_rewrite;
-    $wp_rewrite->flush_rules( $hard );
+}
 /**
 …
  */
 define( 'EP_ALL', EP_PERMALINK | EP_ATTACHMENT | EP_ROOT | EP_COMMENTS | EP_SEARCH | EP_PAGES | EP_ALL_ARCHIVES );
-/**
- * Add an endpoint, like /trackback/.
+ *
- * Adding an endpoint creates extra rewrite rules for each of the matching
- * places specified by the provided bitmask. For example:
+ *
- *     add_rewrite_endpoint( 'json', EP_PERMALINK | EP_PAGES );
+ *
- * will add a new rewrite rule ending with "json(/(.*))?/?$" for every permastruct
- * that describes a permalink (post) or page. This is rewritten to "json=$match"
- * where $match is the part of the URL matched by the endpoint regex (e.g. "foo" in
- * "[permalink]/json/foo/").
+ *
- * A new query var with the same name as the endpoint will also be created.
+ *
- * When specifying $places ensure that you are using the EP_* constants (or a
- * combination of them using the bitwise OR operator) as their values are not
- * guaranteed to remain static (especially `EP_ALL`).
+ *
- * Be sure to flush the rewrite rules - see flush_rewrite_rules() - when your plugin gets
- * activated and deactivated.
+ *
- * @since 2.1.0
- * @since 4.3.0 Added support for skipping query var registration by passing `false` to `$query_var`.
+ *
- * @global WP_Rewrite $wp_rewrite
+ *
- * @param string      $name      Name of the endpoint.
- * @param int         $places    Endpoint mask describing the places the endpoint should be added.
- * @param string|bool $query_var Name of the corresponding query variable. Pass `false` to skip registering a query_var
- *                               for this endpoint. Defaults to the value of `$name`.
- */
-function add_rewrite_endpoint( $name, $places, $query_var = true ) {
-    global $wp_rewrite;
-    $wp_rewrite->add_endpoint( $name, $places, $query_var );
+}
-/**
- * Filter the URL base for taxonomies.
+ *
- * To remove any manually prepended /index.php/.
+ *
- * @access private
- * @since 2.6.0
+ *
- * @param string $base The taxonomy base that we're going to filter
- * @return string
- */
-function _wp_filter_taxonomy_base( $base ) {
-    if ( !empty( $base ) ) {
-        $base = preg_replace( '|^/index\.php/|', '', $base );
-        $base = trim( $base, '/' );
+    }
-    return $base;
+}
-/**
- * Resolve numeric slugs that collide with date permalinks.
+ *
- * Permalinks of posts with numeric slugs can sometimes look to WP_Query::parse_query()
- * like a date archive, as when your permalink structure is `/%year%/%postname%/` and
- * a post with post_name '05' has the URL `/2015/05/`.
+ *
- * This function detects conflicts of this type and resolves them in favor of the
- * post permalink.
+ *
- * Note that, since 4.3.0, wp_unique_post_slug() prevents the creation of post slugs
- * that would result in a date archive conflict. The resolution performed in this
- * function is primarily for legacy content, as well as cases when the admin has changed
- * the site's permalink structure in a way that introduces URL conflicts.
+ *
- * @since 4.3.0
+ *
- * @param array $query_vars Optional. Query variables for setting up the loop, as determined in
- *                          WP::parse_request(). Default empty array.
- * @return array Returns the original array of query vars, with date/post conflicts resolved.
- */
-function wp_resolve_numeric_slug_conflicts( $query_vars = array() ) {
-    if ( ! isset( $query_vars['year'] ) && ! isset( $query_vars['monthnum'] ) && ! isset( $query_vars['day'] ) ) {
-        return $query_vars;
+    }
-    // Identify the 'postname' position in the permastruct array.
-    $permastructs   = array_values( array_filter( explode( '/', get_option( 'permalink_structure' ) ) ) );
-    $postname_index = array_search( '%postname%', $permastructs );
-    if ( false === $postname_index ) {
-        return $query_vars;
+    }
-    /*
-     * A numeric slug could be confused with a year, month, or day, depending on position. To account for
-     * the possibility of post pagination (eg 2015/2 for the second page of a post called '2015'), our
-     * `is_*` checks are generous: check for year-slug clashes when `is_year` *or* `is_month`, and check
-     * for month-slug clashes when `is_month` *or* `is_day`.
-     */
-    $compare = '';
-    if ( 0 === $postname_index && ( isset( $query_vars['year'] ) || isset( $query_vars['monthnum'] ) ) ) {
-        $compare = 'year';
-    } elseif ( '%year%' === $permastructs[ $postname_index - 1 ] && ( isset( $query_vars['monthnum'] ) || isset( $query_vars['day'] ) ) ) {
-        $compare = 'monthnum';
-    } elseif ( '%monthnum%' === $permastructs[ $postname_index - 1 ] && isset( $query_vars['day'] ) ) {
-        $compare = 'day';
+    }
-    if ( ! $compare ) {
-        return $query_vars;
+    }
-    // This is the potentially clashing slug.
-    $value = $query_vars[ $compare ];
-    $post = get_page_by_path( $value, OBJECT, 'post' );
-    if ( ! ( $post instanceof WP_Post ) ) {
-        return $query_vars;
+    }
-    // If the date of the post doesn't match the date specified in the URL, resolve to the date archive.
-    if ( preg_match( '/^([0-9]{4})\-([0-9]{2})/', $post->post_date, $matches ) && isset( $query_vars['year'] ) && ( 'monthnum' === $compare || 'day' === $compare ) ) {
-        // $matches[1] is the year the post was published.
-        if ( intval( $query_vars['year'] ) !== intval( $matches[1] ) ) {
-            return $query_vars;
+        }
-        // $matches[2] is the month the post was published.
-        if ( 'day' === $compare && isset( $query_vars['monthnum'] ) && intval( $query_vars['monthnum'] ) !== intval( $matches[2] ) ) {
-            return $query_vars;
+        }
+    }
-    /*
-     * If the located post contains nextpage pagination, then the URL chunk following postname may be
-     * intended as the page number. Verify that it's a valid page before resolving to it.
-     */
-    $maybe_page = '';
-    if ( 'year' === $compare && isset( $query_vars['monthnum'] ) ) {
-        $maybe_page = $query_vars['monthnum'];
-    } elseif ( 'monthnum' === $compare && isset( $query_vars['day'] ) ) {
-        $maybe_page = $query_vars['day'];
+    }
-    $post_page_count = substr_count( $post->post_content, '<!--nextpage-->' ) + 1;
-    // If the post doesn't have multiple pages, but a 'page' candidate is found, resolve to the date archive.
-    if ( 1 === $post_page_count && $maybe_page ) {
-        return $query_vars;
+    }
-    // If the post has multiple pages and the 'page' number isn't valid, resolve to the date archive.
-    if ( $post_page_count > 1 && $maybe_page > $post_page_count ) {
-        return $query_vars;
+    }
-    // If we've gotten to this point, we have a slug/date clash. First, adjust for nextpage.
-    if ( '' !== $maybe_page ) {
-        $query_vars['page'] = intval( $maybe_page );
+    }
-    // Next, unset autodetected date-related query vars.
-    unset( $query_vars['year'] );
-    unset( $query_vars['monthnum'] );
-    unset( $query_vars['day'] );
-    // Then, set the identified post.
-    $query_vars['name'] = $post->post_name;
-    // Finally, return the modified query vars.
-    return $query_vars;
+}
-/**
- * Examine a url and try to determine the post ID it represents.
+ *
- * Checks are supposedly from the hosted site blog.
+ *
- * @since 1.0.0
+ *
- * @global WP_Rewrite $wp_rewrite
- * @global WP         $wp
+ *
- * @param string $url Permalink to check.
- * @return int Post ID, or 0 on failure.
- */
-function url_to_postid( $url ) {
-    global $wp_rewrite;
-    /**
-     * Filter the URL to derive the post ID from.
+     *
-     * @since 2.2.0
+     *
-     * @param string $url The URL to derive the post ID from.
-     */
-    $url = apply_filters( 'url_to_postid', $url );
-    // First, check to see if there is a 'p=N' or 'page_id=N' to match against
-    if ( preg_match('#[?&](p|page_id|attachment_id)=(\d+)#', $url, $values) )   {
-        $id = absint($values[2]);
-        if ( $id )
-            return $id;
+    }
-    // Check to see if we are using rewrite rules
-    $rewrite = $wp_rewrite->wp_rewrite_rules();
-    // Not using rewrite rules, and 'p=N' and 'page_id=N' methods failed, so we're out of options
-    if ( empty($rewrite) )
-        return 0;
-    // Get rid of the #anchor
-    $url_split = explode('#', $url);
-    $url = $url_split[0];
-    // Get rid of URL ?query=string
-    $url_split = explode('?', $url);
-    $url = $url_split[0];
-    // Add 'www.' if it is absent and should be there
-    if ( false !== strpos(home_url(), '://www.') && false === strpos($url, '://www.') )
-        $url = str_replace('://', '://www.', $url);
-    // Strip 'www.' if it is present and shouldn't be
-    if ( false === strpos(home_url(), '://www.') )
-        $url = str_replace('://www.', '://', $url);
-    // Strip 'index.php/' if we're not using path info permalinks
-    if ( !$wp_rewrite->using_index_permalinks() )
-        $url = str_replace( $wp_rewrite->index . '/', '', $url );
-    if ( false !== strpos( trailingslashit( $url ), home_url( '/' ) ) ) {
-        // Chop off http://domain.com/[path]
-        $url = str_replace(home_url(), '', $url);
-    } else {
-        // Chop off /path/to/blog
-        $home_path = parse_url( home_url( '/' ) );
-        $home_path = isset( $home_path['path'] ) ? $home_path['path'] : '' ;
-        $url = preg_replace( sprintf( '#^%s#', preg_quote( $home_path ) ), '', trailingslashit( $url ) );
+    }
-    // Trim leading and lagging slashes
-    $url = trim($url, '/');
-    $request = $url;
-    $post_type_query_vars = array();
-    foreach ( get_post_types( array() , 'objects' ) as $post_type => $t ) {
-        if ( ! empty( $t->query_var ) )
-            $post_type_query_vars[ $t->query_var ] = $post_type;
+    }
-    // Look for matches.
-    $request_match = $request;
-    foreach ( (array)$rewrite as $match => $query) {
-        // If the requesting file is the anchor of the match, prepend it
-        // to the path info.
-        if ( !empty($url) && ($url != $request) && (strpos($match, $url) === 0) )
-            $request_match = $url . '/' . $request;
-        if ( preg_match("#^$match#", $request_match, $matches) ) {
-            if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
-                // This is a verbose page match, let's check to be sure about it.
-                if ( ! get_page_by_path( $matches[ $varmatch[1] ] ) )
-                    continue;
+            }
-            // Got a match.
-            // Trim the query of everything up to the '?'.
-            $query = preg_replace("!^.+\?!", '', $query);
-            // Substitute the substring matches into the query.
-            $query = addslashes(WP_MatchesMapRegex::apply($query, $matches));
-            // Filter out non-public query vars
-            global $wp;
-            parse_str( $query, $query_vars );
-            $query = array();
-            foreach ( (array) $query_vars as $key => $value ) {
-                if ( in_array( $key, $wp->public_query_vars ) ){
-                    $query[$key] = $value;
-                    if ( isset( $post_type_query_vars[$key] ) ) {
-                        $query['post_type'] = $post_type_query_vars[$key];
-                        $query['name'] = $value;
+                    }
+                }
+            }
-            // Resolve conflicts between posts with numeric slugs and date archive queries.
-            $query = wp_resolve_numeric_slug_conflicts( $query );
-            // Do the query
-            $query = new WP_Query( $query );
-            if ( ! empty( $query->posts ) && $query->is_singular )
-                return $query->post->ID;
-            else
-                return 0;
+        }
+    }
-    return 0;
+}
-/**
- * WordPress Rewrite Component.
+ *
- * The WordPress Rewrite class writes the rewrite module rules to the .htaccess
- * file. It also handles parsing the request to get the correct setup for the
- * WordPress Query class.
+ *
- * The Rewrite along with WP class function as a front controller for WordPress.
- * You can add rules to trigger your page view and processing using this
- * component. The full functionality of a front controller does not exist,
- * meaning you can't define how the template files load based on the rewrite
- * rules.
+ *
- * @since 1.5.0
- */
-class WP_Rewrite {
-    /**
-     * Permalink structure for posts.
+     *
-     * @since 1.5.0
-     * @var string
-     */
-    public $permalink_structure;
-    /**
-     * Whether to add trailing slashes.
+     *
-     * @since 2.2.0
-     * @var bool
-     */
-    public $use_trailing_slashes;
-    /**
-     * Base for the author permalink structure (example.com/$author_base/authorname).
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $author_base = 'author';
-    /**
-     * Permalink structure for author archives.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $author_structure;
-    /**
-     * Permalink structure for date archives.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $date_structure;
-    /**
-     * Permalink structure for pages.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $page_structure;
-    /**
-     * Base of the search permalink structure (example.com/$search_base/query).
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $search_base = 'search';
-    /**
-     * Permalink structure for searches.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $search_structure;
-    /**
-     * Comments permalink base.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $comments_base = 'comments';
-    /**
-     * Pagination permalink base.
+     *
-     * @since 3.1.0
-     * @var string
-     */
-    public $pagination_base = 'page';
-    /**
-     * Comments pagination permalink base.
+     *
-     * @since 4.2.0
-     * @access private
-     * @var string
-     */
-    var $comments_pagination_base = 'comment-page';
-    /**
-     * Feed permalink base.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $feed_base = 'feed';
-    /**
-     * Comments feed permalink structure.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $comment_feed_structure;
-    /**
-     * Feed request permalink structure.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $feed_structure;
-    /**
-     * The static portion of the post permalink structure.
+     *
-     * If the permalink structure is "/archive/%post_id%" then the front
-     * is "/archive/". If the permalink structure is "/%year%/%postname%/"
-     * then the front is "/".
+     *
-     * @see WP_Rewrite::init()
-     * @since 1.5.0
-     * @var string
-     */
-    public $front;
-    /**
-     * The prefix for all permalink structures.
+     *
-     * If PATHINFO/index permalinks are in use then the root is the value of
-     * {@link WP_Rewrite::$index} with a trailing slash appended. Otherwise
-     * the root will be empty.
+     *
-     * @see WP_Rewrite::init()
-     * @see WP_Rewrite::using_index_permalinks()
-     * @since 1.5.0
-     * @var string
-     */
-    public $root = '';
-    /**
-     * The name of the index file which is the entry point to all requests.
+     *
-     * @since 1.5.0
-     * @access public
-     * @var string
-     */
-    public $index = 'index.php';
-    /**
-     * Variable name to use for regex matches in the rewritten query.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $matches = '';
-    /**
-     * Rewrite rules to match against the request to find the redirect or query.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var array
-     */
-    var $rules;
-    /**
-     * Additional rules added external to the rewrite class.
+     *
-     * Those not generated by the class, see add_rewrite_rule().
+     *
-     * @since 2.1.0
-     * @access private
-     * @var array
-     */
-    var $extra_rules = array();
-    /**
-     * Additional rules that belong at the beginning to match first.
+     *
-     * Those not generated by the class, see add_rewrite_rule().
+     *
-     * @since 2.3.0
-     * @access private
-     * @var array
-     */
-    var $extra_rules_top = array();
-    /**
-     * Rules that don't redirect to WordPress' index.php.
+     *
-     * These rules are written to the mod_rewrite portion of the .htaccess,
-     * and are added by {@link add_external_rule()}.
+     *
-     * @since 2.1.0
-     * @access private
-     * @var array
-     */
-    var $non_wp_rules = array();
-    /**
-     * Extra permalink structures, e.g. categories, added by {@link add_permastruct()}.
+     *
-     * @since 2.1.0
-     * @access private
-     * @var array
-     */
-    var $extra_permastructs = array();
-    /**
-     * Endpoints (like /trackback/) added by {@link add_rewrite_endpoint()}.
+     *
-     * @since 2.1.0
-     * @access private
-     * @var array
-     */
-    var $endpoints;
-    /**
-     * Whether to write every mod_rewrite rule for WordPress into the .htaccess file.
+     *
-     * This is off by default, turning it on might print a lot of rewrite rules
-     * to the .htaccess file.
+     *
-     * @see WP_Rewrite::mod_rewrite_rules()
-     * @since 2.0.0
-     * @access public
-     * @var bool
-     */
-    public $use_verbose_rules = false;
-    /**
-     * Could post permalinks be confused with those of pages?
+     *
-     * If the first rewrite tag in the post permalink structure is one that could
-     * also match a page name (e.g. %postname% or %author%) then this flag is
-     * set to true. Prior to WordPress 3.3 this flag indicated that every page
-     * would have a set of rules added to the top of the rewrite rules array.
-     * Now it tells {@link WP::parse_request()} to check if a URL matching the
-     * page permastruct is actually a page before accepting it.
+     *
-     * @link https://core.trac.wordpress.org/ticket/16687
-     * @see WP_Rewrite::init()
-     * @since 2.5.0
-     * @access public
-     * @var bool
-     */
-    public $use_verbose_page_rules = true;
-    /**
-     * Rewrite tags that can be used in permalink structures.
+     *
-     * These are translated into the regular expressions stored in
-     * {@link WP_Rewrite::$rewritereplace} and are rewritten to the
-     * query variables listed in {@link WP_Rewrite::$queryreplace}.
+     *
-     * Additional tags can be added with {@link add_rewrite_tag()}.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var array
-     */
-    var $rewritecode = array(
-        '%year%',
-        '%monthnum%',
-        '%day%',
-        '%hour%',
-        '%minute%',
-        '%second%',
-        '%postname%',
-        '%post_id%',
-        '%author%',
-        '%pagename%',
-        '%search%'
-    );
-    /**
-     * Regular expressions to be substituted into rewrite rules in place
-     * of rewrite tags, see {@link WP_Rewrite::$rewritecode}.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var array
-     */
-    var $rewritereplace = array(
-        '([0-9]{4})',
-        '([0-9]{1,2})',
-        '([0-9]{1,2})',
-        '([0-9]{1,2})',
-        '([0-9]{1,2})',
-        '([0-9]{1,2})',
-        '([^/]+)',
-        '([0-9]+)',
-        '([^/]+)',
-        '([^/]+?)',
-        '(.+)'
-    );
-    /**
-     * Query variables that rewrite tags map to, see {@link WP_Rewrite::$rewritecode}.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var array
-     */
-    var $queryreplace = array(
-        'year=',
-        'monthnum=',
-        'day=',
-        'hour=',
-        'minute=',
-        'second=',
-        'name=',
-        'p=',
-        'author_name=',
-        'pagename=',
-        's='
-    );
-    /**
-     * Supported default feeds.
+     *
-     * @since 1.5.0
-     * @var array
-     */
-    public $feeds = array( 'feed', 'rdf', 'rss', 'rss2', 'atom' );
-    /**
-     * Whether permalinks are being used.
+     *
-     * This can be either rewrite module or permalink in the HTTP query string.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return bool True, if permalinks are enabled.
-     */
-    public function using_permalinks() {
-        return ! empty($this->permalink_structure);
+    }
-    /**
-     * Whether permalinks are being used and rewrite module is not enabled.
+     *
-     * Means that permalink links are enabled and index.php is in the URL.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return bool
-     */
-    public function using_index_permalinks() {
-        if ( empty( $this->permalink_structure ) ) {
-            return false;
+        }
-        // If the index is not in the permalink, we're using mod_rewrite.
-        return preg_match( '#^/*' . $this->index . '#', $this->permalink_structure );
+    }
-    /**
-     * Whether permalinks are being used and rewrite module is enabled.
+     *
-     * Using permalinks and index.php is not in the URL.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return bool
-     */
-    public function using_mod_rewrite_permalinks() {
-        return $this->using_permalinks() && ! $this->using_index_permalinks();
+    }
-    /**
-     * Index for matches for usage in preg_*() functions.
+     *
-     * The format of the string is, with empty matches property value, '$NUM'.
-     * The 'NUM' will be replaced with the value in the $number parameter. With
-     * the matches property not empty, the value of the returned string will
-     * contain that value of the matches property. The format then will be
-     * '$MATCHES[NUM]', with MATCHES as the value in the property and NUM the
-     * value of the $number parameter.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @param int $number Index number.
-     * @return string
-     */
-    public function preg_index($number) {
-        $match_prefix = '$';
-        $match_suffix = '';
-        if ( ! empty($this->matches) ) {
-            $match_prefix = '$' . $this->matches . '[';
-            $match_suffix = ']';
+        }
-        return "$match_prefix$number$match_suffix";
+    }
-    /**
-     * Retrieve all page and attachments for pages URIs.
+     *
-     * The attachments are for those that have pages as parents and will be
-     * retrieved.
+     *
-     * @since 2.5.0
-     * @access public
+     *
-     * @global wpdb $wpdb
+     *
-     * @return array Array of page URIs as first element and attachment URIs as second element.
-     */
-    public function page_uri_index() {
-        global $wpdb;
-        //get pages in order of hierarchy, i.e. children after parents
-        $pages = $wpdb->get_results("SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_type = 'page' AND post_status != 'auto-draft'");
-        $posts = get_page_hierarchy( $pages );
-        // If we have no pages get out quick
-        if ( !$posts )
-            return array( array(), array() );
-        //now reverse it, because we need parents after children for rewrite rules to work properly
-        $posts = array_reverse($posts, true);
-        $page_uris = array();
-        $page_attachment_uris = array();
-        foreach ( $posts as $id => $post ) {
-            // URL => page name
-            $uri = get_page_uri($id);
-            $attachments = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_type = 'attachment' AND post_parent = %d", $id ));
-            if ( !empty($attachments) ) {
-                foreach ( $attachments as $attachment ) {
-                    $attach_uri = get_page_uri($attachment->ID);
-                    $page_attachment_uris[$attach_uri] = $attachment->ID;
+                }
+            }
-            $page_uris[$uri] = $id;
+        }
-        return array( $page_uris, $page_attachment_uris );
+    }
-    /**
-     * Retrieve all of the rewrite rules for pages.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return array
-     */
-    public function page_rewrite_rules() {
-        // the extra .? at the beginning prevents clashes with other regular expressions in the rules array
-        $this->add_rewrite_tag( '%pagename%', '(.?.+?)', 'pagename=' );
-        return $this->generate_rewrite_rules( $this->get_page_permastruct(), EP_PAGES, true, true, false, false );
+    }
-    /**
-     * Retrieve date permalink structure, with year, month, and day.
+     *
-     * The permalink structure for the date, if not set already depends on the
-     * permalink structure. It can be one of three formats. The first is year,
-     * month, day; the second is day, month, year; and the last format is month,
-     * day, year. These are matched against the permalink structure for which
-     * one is used. If none matches, then the default will be used, which is
-     * year, month, day.
+     *
-     * Prevents post ID and date permalinks from overlapping. In the case of
-     * post_id, the date permalink will be prepended with front permalink with
-     * 'date/' before the actual permalink to form the complete date permalink
-     * structure.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False on no permalink structure. Date permalink structure.
-     */
-    public function get_date_permastruct() {
-        if ( isset($this->date_structure) )
-            return $this->date_structure;
-        if ( empty($this->permalink_structure) ) {
-            $this->date_structure = '';
-            return false;
+        }
-        // The date permalink must have year, month, and day separated by slashes.
-        $endians = array('%year%/%monthnum%/%day%', '%day%/%monthnum%/%year%', '%monthnum%/%day%/%year%');
-        $this->date_structure = '';
-        $date_endian = '';
-        foreach ( $endians as $endian ) {
-            if ( false !== strpos($this->permalink_structure, $endian) ) {
-                $date_endian= $endian;
-                break;
+            }
+        }
-        if ( empty($date_endian) )
-            $date_endian = '%year%/%monthnum%/%day%';
-        // Do not allow the date tags and %post_id% to overlap in the permalink
-        // structure. If they do, move the date tags to $front/date/.
-        $front = $this->front;
-        preg_match_all('/%.+?%/', $this->permalink_structure, $tokens);
-        $tok_index = 1;
-        foreach ( (array) $tokens[0] as $token) {
-            if ( '%post_id%' == $token && ($tok_index <= 3) ) {
-                $front = $front . 'date/';
-                break;
+            }
-            $tok_index++;
+        }
-        $this->date_structure = $front . $date_endian;
-        return $this->date_structure;
+    }
-    /**
-     * Retrieve the year permalink structure without month and day.
+     *
-     * Gets the date permalink structure and strips out the month and day
-     * permalink structures.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return false|string False on failure. Year structure on success.
-     */
-    public function get_year_permastruct() {
-        $structure = $this->get_date_permastruct();
-        if ( empty($structure) )
-            return false;
-        $structure = str_replace('%monthnum%', '', $structure);
-        $structure = str_replace('%day%', '', $structure);
-        $structure = preg_replace('#/+#', '/', $structure);
-        return $structure;
+    }
-    /**
-     * Retrieve the month permalink structure without day and with year.
+     *
-     * Gets the date permalink structure and strips out the day permalink
-     * structures. Keeps the year permalink structure.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return false|string False on failure. Year/Month structure on success.
-     */
-    public function get_month_permastruct() {
-        $structure = $this->get_date_permastruct();
-        if ( empty($structure) )
-            return false;
-        $structure = str_replace('%day%', '', $structure);
-        $structure = preg_replace('#/+#', '/', $structure);
-        return $structure;
+    }
-    /**
-     * Retrieve the day permalink structure with month and year.
+     *
-     * Keeps date permalink structure with all year, month, and day.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False on failure. Year/Month/Day structure on success.
-     */
-    public function get_day_permastruct() {
-        return $this->get_date_permastruct();
+    }
-    /**
-     * Retrieve the permalink structure for categories.
+     *
-     * If the category_base property has no value, then the category structure
-     * will have the front property value, followed by 'category', and finally
-     * '%category%'. If it does, then the root property will be used, along with
-     * the category_base property value.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False on failure. Category permalink structure.
-     */
-    public function get_category_permastruct() {
-        return $this->get_extra_permastruct('category');
+    }
-    /**
-     * Retrieve the permalink structure for tags.
+     *
-     * If the tag_base property has no value, then the tag structure will have
-     * the front property value, followed by 'tag', and finally '%tag%'. If it
-     * does, then the root property will be used, along with the tag_base
-     * property value.
+     *
-     * @since 2.3.0
-     * @access public
+     *
-     * @return string|false False on failure. Tag permalink structure.
-     */
-    public function get_tag_permastruct() {
-        return $this->get_extra_permastruct('post_tag');
+    }
-    /**
-     * Retrieve extra permalink structure by name.
+     *
-     * @since 2.5.0
-     * @access public
+     *
-     * @param string $name Permalink structure name.
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_extra_permastruct($name) {
-        if ( empty($this->permalink_structure) )
-            return false;
-        if ( isset($this->extra_permastructs[$name]) )
-            return $this->extra_permastructs[$name]['struct'];
-        return false;
+    }
-    /**
-     * Retrieve the author permalink structure.
+     *
-     * The permalink structure is front property, author base, and finally
-     * '/%author%'. Will set the author_structure property and then return it
-     * without attempting to set the value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_author_permastruct() {
-        if ( isset($this->author_structure) )
-            return $this->author_structure;
-        if ( empty($this->permalink_structure) ) {
-            $this->author_structure = '';
-            return false;
+        }
-        $this->author_structure = $this->front . $this->author_base . '/%author%';
-        return $this->author_structure;
+    }
-    /**
-     * Retrieve the search permalink structure.
+     *
-     * The permalink structure is root property, search base, and finally
-     * '/%search%'. Will set the search_structure property and then return it
-     * without attempting to set the value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_search_permastruct() {
-        if ( isset($this->search_structure) )
-            return $this->search_structure;
-        if ( empty($this->permalink_structure) ) {
-            $this->search_structure = '';
-            return false;
+        }
-        $this->search_structure = $this->root . $this->search_base . '/%search%';
-        return $this->search_structure;
+    }
-    /**
-     * Retrieve the page permalink structure.
+     *
-     * The permalink structure is root property, and '%pagename%'. Will set the
-     * page_structure property and then return it without attempting to set the
-     * value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_page_permastruct() {
-        if ( isset($this->page_structure) )
-            return $this->page_structure;
-        if (empty($this->permalink_structure)) {
-            $this->page_structure = '';
-            return false;
+        }
-        $this->page_structure = $this->root . '%pagename%';
-        return $this->page_structure;
+    }
-    /**
-     * Retrieve the feed permalink structure.
+     *
-     * The permalink structure is root property, feed base, and finally
-     * '/%feed%'. Will set the feed_structure property and then return it
-     * without attempting to set the value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_feed_permastruct() {
-        if ( isset($this->feed_structure) )
-            return $this->feed_structure;
-        if ( empty($this->permalink_structure) ) {
-            $this->feed_structure = '';
-            return false;
+        }
-        $this->feed_structure = $this->root . $this->feed_base . '/%feed%';
-        return $this->feed_structure;
+    }
-    /**
-     * Retrieve the comment feed permalink structure.
+     *
-     * The permalink structure is root property, comment base property, feed
-     * base and finally '/%feed%'. Will set the comment_feed_structure property
-     * and then return it without attempting to set the value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_comment_feed_permastruct() {
-        if ( isset($this->comment_feed_structure) )
-            return $this->comment_feed_structure;
-        if (empty($this->permalink_structure)) {
-            $this->comment_feed_structure = '';
-            return false;
+        }
-        $this->comment_feed_structure = $this->root . $this->comments_base . '/' . $this->feed_base . '/%feed%';
-        return $this->comment_feed_structure;
+    }
-    /**
-     * Add or update existing rewrite tags (e.g. %postname%).
+     *
-     * If the tag already exists, replace the existing pattern and query for
-     * that tag, otherwise add the new tag.
+     *
-     * @see WP_Rewrite::$rewritecode
-     * @see WP_Rewrite::$rewritereplace
-     * @see WP_Rewrite::$queryreplace
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $tag   Name of the rewrite tag to add or update.
-     * @param string $regex Regular expression to substitute the tag for in rewrite rules.
-     * @param string $query String to append to the rewritten query. Must end in '='.
-     */
-    public function add_rewrite_tag( $tag, $regex, $query ) {
-        $position = array_search( $tag, $this->rewritecode );
-        if ( false !== $position && null !== $position ) {
-            $this->rewritereplace[ $position ] = $regex;
-            $this->queryreplace[ $position ] = $query;
-        } else {
-            $this->rewritecode[] = $tag;
-            $this->rewritereplace[] = $regex;
-            $this->queryreplace[] = $query;
+        }
+    }
-    /**
-     * Generate rewrite rules from a permalink structure.
+     *
-     * The main WP_Rewrite function for building the rewrite rule list. The
-     * contents of the function is a mix of black magic and regular expressions,
-     * so best just ignore the contents and move to the parameters.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $permalink_structure The permalink structure.
-     * @param int    $ep_mask             Endpoint mask defining what endpoints are added to the structure. Default is EP_NONE.
-     * @param bool   $paged               Should archive pagination rules be added for the structure? Default is true.
-     * @param bool   $feed                Should feed rewrite rules be added for the structure? Default is true.
-     * @param bool   $forcomments         Should the feed rules be a query for a comments feed? Default is false.
-     * @param bool   $walk_dirs           Should the 'directories' making up the structure be walked over and rewrite rules
-     *                                    built for each in turn? Default is true.
-     * @param bool   $endpoints           Should endpoints be applied to the generated rewrite rules? Default is true.
-     * @return array Rewrite rule list.
-     */
-    public function generate_rewrite_rules($permalink_structure, $ep_mask = EP_NONE, $paged = true, $feed = true, $forcomments = false, $walk_dirs = true, $endpoints = true) {
-        //build a regex to match the feed section of URLs, something like (feed|atom|rss|rss2)/?
-        $feedregex2 = '';
-        foreach ( (array) $this->feeds as $feed_name)
-            $feedregex2 .= $feed_name . '|';
-        $feedregex2 = '(' . trim($feedregex2, '|') . ')/?$';
-        //$feedregex is identical but with /feed/ added on as well, so URLs like <permalink>/feed/atom
-        //and <permalink>/atom are both possible
-        $feedregex = $this->feed_base . '/' . $feedregex2;
-        //build a regex to match the trackback and page/xx parts of URLs
-        $trackbackregex = 'trackback/?$';
-        $pageregex = $this->pagination_base . '/?([0-9]{1,})/?$';
-        $commentregex = $this->comments_pagination_base . '-([0-9]{1,})/?$';
-        //build up an array of endpoint regexes to append => queries to append
-        if ( $endpoints ) {
-            $ep_query_append = array ();
-            foreach ( (array) $this->endpoints as $endpoint) {
-                //match everything after the endpoint name, but allow for nothing to appear there
-                $epmatch = $endpoint[1] . '(/(.*))?/?$';
-                //this will be appended on to the rest of the query for each dir
-                $epquery = '&' . $endpoint[2] . '=';
-                $ep_query_append[$epmatch] = array ( $endpoint[0], $epquery );
+            }
+        }
-        //get everything up to the first rewrite tag
-        $front = substr($permalink_structure, 0, strpos($permalink_structure, '%'));
-        //build an array of the tags (note that said array ends up being in $tokens[0])
-        preg_match_all('/%.+?%/', $permalink_structure, $tokens);
-        $num_tokens = count($tokens[0]);
-        $index = $this->index; //probably 'index.php'
-        $feedindex = $index;
-        $trackbackindex = $index;
-        //build a list from the rewritecode and queryreplace arrays, that will look something like
-        //tagname=$matches[i] where i is the current $i
-        $queries = array();
-        for ( $i = 0; $i < $num_tokens; ++$i ) {
-            if ( 0 < $i )
-                $queries[$i] = $queries[$i - 1] . '&';
-            else
-                $queries[$i] = '';
-            $query_token = str_replace($this->rewritecode, $this->queryreplace, $tokens[0][$i]) . $this->preg_index($i+1);
-            $queries[$i] .= $query_token;
+        }
-        //get the structure, minus any cruft (stuff that isn't tags) at the front
-        $structure = $permalink_structure;
-        if ( $front != '/' )
-            $structure = str_replace($front, '', $structure);
-        //create a list of dirs to walk over, making rewrite rules for each level
-        //so for example, a $structure of /%year%/%monthnum%/%postname% would create
-        //rewrite rules for /%year%/, /%year%/%monthnum%/ and /%year%/%monthnum%/%postname%
-        $structure = trim($structure, '/');
-        $dirs = $walk_dirs ? explode('/', $structure) : array( $structure );
-        $num_dirs = count($dirs);
-        //strip slashes from the front of $front
-        $front = preg_replace('|^/+|', '', $front);
-        //the main workhorse loop
-        $post_rewrite = array();
-        $struct = $front;
-        for ( $j = 0; $j < $num_dirs; ++$j ) {
-            //get the struct for this dir, and trim slashes off the front
-            $struct .= $dirs[$j] . '/'; //accumulate. see comment near explode('/', $structure) above
-            $struct = ltrim($struct, '/');
-            //replace tags with regexes
-            $match = str_replace($this->rewritecode, $this->rewritereplace, $struct);
-            //make a list of tags, and store how many there are in $num_toks
-            $num_toks = preg_match_all('/%.+?%/', $struct, $toks);
-            //get the 'tagname=$matches[i]'
-            $query = ( ! empty( $num_toks ) && isset( $queries[$num_toks - 1] ) ) ? $queries[$num_toks - 1] : '';
-            //set up $ep_mask_specific which is used to match more specific URL types
-            switch ( $dirs[$j] ) {
-                case '%year%':
-                    $ep_mask_specific = EP_YEAR;
-                    break;
-                case '%monthnum%':
-                    $ep_mask_specific = EP_MONTH;
-                    break;
-                case '%day%':
-                    $ep_mask_specific = EP_DAY;
-                    break;
-                default:
-                    $ep_mask_specific = EP_NONE;
+            }
-            //create query for /page/xx
-            $pagematch = $match . $pageregex;
-            $pagequery = $index . '?' . $query . '&paged=' . $this->preg_index($num_toks + 1);
-            //create query for /comment-page-xx
-            $commentmatch = $match . $commentregex;
-            $commentquery = $index . '?' . $query . '&cpage=' . $this->preg_index($num_toks + 1);
-            if ( get_option('page_on_front') ) {
-                //create query for Root /comment-page-xx
-                $rootcommentmatch = $match . $commentregex;
-                $rootcommentquery = $index . '?' . $query . '&page_id=' . get_option('page_on_front') . '&cpage=' . $this->preg_index($num_toks + 1);
+            }
-            //create query for /feed/(feed|atom|rss|rss2|rdf)
-            $feedmatch = $match . $feedregex;
-            $feedquery = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);
-            //create query for /(feed|atom|rss|rss2|rdf) (see comment near creation of $feedregex)
-            $feedmatch2 = $match . $feedregex2;
-            $feedquery2 = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);
-            //if asked to, turn the feed queries into comment feed ones
-            if ( $forcomments ) {
-                $feedquery .= '&withcomments=1';
-                $feedquery2 .= '&withcomments=1';
+            }
-            //start creating the array of rewrites for this dir
-            $rewrite = array();
-            if ( $feed ) //...adding on /feed/ regexes => queries
-                $rewrite = array($feedmatch => $feedquery, $feedmatch2 => $feedquery2);
-            if ( $paged ) //...and /page/xx ones
-                $rewrite = array_merge($rewrite, array($pagematch => $pagequery));
-            //only on pages with comments add ../comment-page-xx/
-            if ( EP_PAGES & $ep_mask || EP_PERMALINK & $ep_mask ) {
-                $rewrite = array_merge($rewrite, array($commentmatch => $commentquery));
-            } elseif ( EP_ROOT & $ep_mask && get_option('page_on_front') ) {
-                $rewrite = array_merge($rewrite, array($rootcommentmatch => $rootcommentquery));
+            }
-            //do endpoints
-            if ( $endpoints ) {
-                foreach ( (array) $ep_query_append as $regex => $ep) {
-                    //add the endpoints on if the mask fits
-                    if ( $ep[0] & $ep_mask || $ep[0] & $ep_mask_specific )
-                        $rewrite[$match . $regex] = $index . '?' . $query . $ep[1] . $this->preg_index($num_toks + 2);
+                }
+            }
-            //if we've got some tags in this dir
-            if ( $num_toks ) {
-                $post = false;
-                $page = false;
-                //check to see if this dir is permalink-level: i.e. the structure specifies an
-                //individual post. Do this by checking it contains at least one of 1) post name,
-                //2) post ID, 3) page name, 4) timestamp (year, month, day, hour, second and
-                //minute all present). Set these flags now as we need them for the endpoints.
-                if ( strpos($struct, '%postname%') !== false
-                        || strpos($struct, '%post_id%') !== false
-                        || strpos($struct, '%pagename%') !== false
-                        || (strpos($struct, '%year%') !== false && strpos($struct, '%monthnum%') !== false && strpos($struct, '%day%') !== false && strpos($struct, '%hour%') !== false && strpos($struct, '%minute%') !== false && strpos($struct, '%second%') !== false)
-                        ) {
-                    $post = true;
-                    if ( strpos($struct, '%pagename%') !== false )
-                        $page = true;
+                }
-                if ( ! $post ) {
-                    // For custom post types, we need to add on endpoints as well.
-                    foreach ( get_post_types( array('_builtin' => false ) ) as $ptype ) {
-                        if ( strpos($struct, "%$ptype%") !== false ) {
-                            $post = true;
-                            $page = is_post_type_hierarchical( $ptype ); // This is for page style attachment url's
-                            break;
+                        }
+                    }
+                }
-                //if we're creating rules for a permalink, do all the endpoints like attachments etc
-                if ( $post ) {
-                    //create query and regex for trackback
-                    $trackbackmatch = $match . $trackbackregex;
-                    $trackbackquery = $trackbackindex . '?' . $query . '&tb=1';
-                    //trim slashes from the end of the regex for this dir
-                    $match = rtrim($match, '/');
-                    //get rid of brackets
-                    $submatchbase = str_replace( array('(', ')'), '', $match);
-                    //add a rule for at attachments, which take the form of <permalink>/some-text
-                    $sub1 = $submatchbase . '/([^/]+)/';
-                    $sub1tb = $sub1 . $trackbackregex; //add trackback regex <permalink>/trackback/...
-                    $sub1feed = $sub1 . $feedregex; //and <permalink>/feed/(atom|...)
-                    $sub1feed2 = $sub1 . $feedregex2; //and <permalink>/(feed|atom...)
-                    $sub1comment = $sub1 . $commentregex; //and <permalink>/comment-page-xx
-                    //add another rule to match attachments in the explicit form:
-                    //<permalink>/attachment/some-text
-                    $sub2 = $submatchbase . '/attachment/([^/]+)/';
-                    $sub2tb = $sub2 . $trackbackregex; //and add trackbacks <permalink>/attachment/trackback
-                    $sub2feed = $sub2 . $feedregex;    //feeds, <permalink>/attachment/feed/(atom|...)
-                    $sub2feed2 = $sub2 . $feedregex2;  //and feeds again on to this <permalink>/attachment/(feed|atom...)
-                    $sub2comment = $sub2 . $commentregex; //and <permalink>/comment-page-xx
-                    //create queries for these extra tag-ons we've just dealt with
-                    $subquery = $index . '?attachment=' . $this->preg_index(1);
-                    $subtbquery = $subquery . '&tb=1';
-                    $subfeedquery = $subquery . '&feed=' . $this->preg_index(2);
-                    $subcommentquery = $subquery . '&cpage=' . $this->preg_index(2);
-                    //do endpoints for attachments
-                    if ( !empty($endpoints) ) {
-                        foreach ( (array) $ep_query_append as $regex => $ep ) {
-                            if ( $ep[0] & EP_ATTACHMENT ) {
-                                $rewrite[$sub1 . $regex] = $subquery . $ep[1] . $this->preg_index(3);
-                                $rewrite[$sub2 . $regex] = $subquery . $ep[1] . $this->preg_index(3);
+                            }
+                        }
+                    }
-                    //now we've finished with endpoints, finish off the $sub1 and $sub2 matches
-                    //add a ? as we don't have to match that last slash, and finally a $ so we
-                    //match to the end of the URL
-                    $sub1 .= '?$';
-                    $sub2 .= '?$';
-                    //post pagination, e.g. <permalink>/2/
-                    $match = $match . '(/[0-9]+)?/?$';
-                    $query = $index . '?' . $query . '&page=' . $this->preg_index($num_toks + 1);
-                } else { //not matching a permalink so this is a lot simpler
-                    //close the match and finalise the query
-                    $match .= '?$';
-                    $query = $index . '?' . $query;
+                }
-                //create the final array for this dir by joining the $rewrite array (which currently
-                //only contains rules/queries for trackback, pages etc) to the main regex/query for
-                //this dir
-                $rewrite = array_merge($rewrite, array($match => $query));
-                //if we're matching a permalink, add those extras (attachments etc) on
-                if ( $post ) {
-                    //add trackback
-                    $rewrite = array_merge(array($trackbackmatch => $trackbackquery), $rewrite);
-                    //add regexes/queries for attachments, attachment trackbacks and so on
-                    if ( ! $page ) //require <permalink>/attachment/stuff form for pages because of confusion with subpages
-                        $rewrite = array_merge($rewrite, array($sub1 => $subquery, $sub1tb => $subtbquery, $sub1feed => $subfeedquery, $sub1feed2 => $subfeedquery, $sub1comment => $subcommentquery));
-                    $rewrite = array_merge(array($sub2 => $subquery, $sub2tb => $subtbquery, $sub2feed => $subfeedquery, $sub2feed2 => $subfeedquery, $sub2comment => $subcommentquery), $rewrite);
+                }
-            } //if($num_toks)
-            //add the rules for this dir to the accumulating $post_rewrite
-            $post_rewrite = array_merge($rewrite, $post_rewrite);
-        } //foreach ($dir)
-        return $post_rewrite; //the finished rules. phew!
+    }
-    /**
-     * Generate Rewrite rules with permalink structure and walking directory only.
+     *
-     * Shorten version of {@link WP_Rewrite::generate_rewrite_rules()} that
-     * allows for shorter list of parameters. See the method for longer
-     * description of what generating rewrite rules does.
+     *
-     * @uses WP_Rewrite::generate_rewrite_rules() See for long description and rest of parameters.
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $permalink_structure The permalink structure to generate rules.
-     * @param bool   $walk_dirs           Optional, default is false. Whether to create list of directories to walk over.
-     * @return array
-     */
-    public function generate_rewrite_rule($permalink_structure, $walk_dirs = false) {
-        return $this->generate_rewrite_rules($permalink_structure, EP_NONE, false, false, false, $walk_dirs);
+    }
-    /**
-     * Construct rewrite matches and queries from permalink structure.
+     *
-     * Runs the action 'generate_rewrite_rules' with the parameter that is an
-     * reference to the current WP_Rewrite instance to further manipulate the
-     * permalink structures and rewrite rules. Runs the 'rewrite_rules_array'
-     * filter on the full rewrite rule array.
+     *
-     * There are two ways to manipulate the rewrite rules, one by hooking into
-     * the 'generate_rewrite_rules' action and gaining full control of the
-     * object or just manipulating the rewrite rule array before it is passed
-     * from the function.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return array An associate array of matches and queries.
-     */
-    public function rewrite_rules() {
-        $rewrite = array();
-        if ( empty($this->permalink_structure) )
-            return $rewrite;
-        // robots.txt -only if installed at the root
-        $home_path = parse_url( home_url() );
-        $robots_rewrite = ( empty( $home_path['path'] ) || '/' == $home_path['path'] ) ? array( 'robots\.txt$' => $this->index . '?robots=1' ) : array();
-        // Old feed and service files
-        $deprecated_files = array(
-            '.*wp-(atom|rdf|rss|rss2|feed|commentsrss2)\.php$' => $this->index . '?feed=old',
-            '.*wp-app\.php(/.*)?$' => $this->index . '?error=403',
-        );
-        // Registration rules
-        $registration_pages = array();
-        if ( is_multisite() && is_main_site() ) {
-            $registration_pages['.*wp-signup.php$'] = $this->index . '?signup=true';
-            $registration_pages['.*wp-activate.php$'] = $this->index . '?activate=true';
+        }
-        $registration_pages['.*wp-register.php$'] = $this->index . '?register=true'; // Deprecated
-        // Post rewrite rules.
-        $post_rewrite = $this->generate_rewrite_rules( $this->permalink_structure, EP_PERMALINK );
-        /**
-         * Filter rewrite rules used for "post" archives.
+         *
-         * @since 1.5.0
+         *
-         * @param array $post_rewrite The rewrite rules for posts.
-         */
-        $post_rewrite = apply_filters( 'post_rewrite_rules', $post_rewrite );
-        // Date rewrite rules.
-        $date_rewrite = $this->generate_rewrite_rules($this->get_date_permastruct(), EP_DATE);
-        /**
-         * Filter rewrite rules used for date archives.
+         *
-         * Likely date archives would include /yyyy/, /yyyy/mm/, and /yyyy/mm/dd/.
+         *
-         * @since 1.5.0
+         *
-         * @param array $date_rewrite The rewrite rules for date archives.
-         */
-        $date_rewrite = apply_filters( 'date_rewrite_rules', $date_rewrite );
-        // Root-level rewrite rules.
-        $root_rewrite = $this->generate_rewrite_rules($this->root . '/', EP_ROOT);
-        /**
-         * Filter rewrite rules used for root-level archives.
+         *
-         * Likely root-level archives would include pagination rules for the homepage
-         * as well as site-wide post feeds (e.g. /feed/, and /feed/atom/).
+         *
-         * @since 1.5.0
+         *
-         * @param array $root_rewrite The root-level rewrite rules.
-         */
-        $root_rewrite = apply_filters( 'root_rewrite_rules', $root_rewrite );
-        // Comments rewrite rules.
-        $comments_rewrite = $this->generate_rewrite_rules($this->root . $this->comments_base, EP_COMMENTS, false, true, true, false);
-        /**
-         * Filter rewrite rules used for comment feed archives.
+         *
-         * Likely comments feed archives include /comments/feed/, and /comments/feed/atom/.
+         *
-         * @since 1.5.0
+         *
-         * @param array $comments_rewrite The rewrite rules for the site-wide comments feeds.
-         */
-        $comments_rewrite = apply_filters( 'comments_rewrite_rules', $comments_rewrite );
-        // Search rewrite rules.
-        $search_structure = $this->get_search_permastruct();
-        $search_rewrite = $this->generate_rewrite_rules($search_structure, EP_SEARCH);
-        /**
-         * Filter rewrite rules used for search archives.
+         *
-         * Likely search-related archives include /search/search+query/ as well as
-         * pagination and feed paths for a search.
+         *
-         * @since 1.5.0
+         *
-         * @param array $search_rewrite The rewrite rules for search queries.
-         */
-        $search_rewrite = apply_filters( 'search_rewrite_rules', $search_rewrite );
-        // Author rewrite rules.
-        $author_rewrite = $this->generate_rewrite_rules($this->get_author_permastruct(), EP_AUTHORS);
-        /**
-         * Filter rewrite rules used for author archives.
+         *
-         * Likely author archives would include /author/author-name/, as well as
-         * pagination and feed paths for author archives.
+         *
-         * @since 1.5.0
+         *
-         * @param array $author_rewrite The rewrite rules for author archives.
-         */
-        $author_rewrite = apply_filters( 'author_rewrite_rules', $author_rewrite );
-        // Pages rewrite rules.
-        $page_rewrite = $this->page_rewrite_rules();
-        /**
-         * Filter rewrite rules used for "page" post type archives.
+         *
-         * @since 1.5.0
+         *
-         * @param array $page_rewrite The rewrite rules for the "page" post type.
-         */
-        $page_rewrite = apply_filters( 'page_rewrite_rules', $page_rewrite );
-        // Extra permastructs.
-        foreach ( $this->extra_permastructs as $permastructname => $struct ) {
-            if ( is_array( $struct ) ) {
-                if ( count( $struct ) == 2 )
-                    $rules = $this->generate_rewrite_rules( $struct[0], $struct[1] );
-                else
-                    $rules = $this->generate_rewrite_rules( $struct['struct'], $struct['ep_mask'], $struct['paged'], $struct['feed'], $struct['forcomments'], $struct['walk_dirs'], $struct['endpoints'] );
-            } else {
-                $rules = $this->generate_rewrite_rules( $struct );
+            }
-            /**
-             * Filter rewrite rules used for individual permastructs.
+             *
-             * The dynamic portion of the hook name, `$permastructname`, refers
-             * to the name of the registered permastruct, e.g. 'post_tag' (tags),
-             * 'category' (categories), etc.
+             *
-             * @since 3.1.0
+             *
-             * @param array $rules The rewrite rules generated for the current permastruct.
-             */
-            $rules = apply_filters( $permastructname . '_rewrite_rules', $rules );
-            if ( 'post_tag' == $permastructname ) {
-                /**
-                 * Filter rewrite rules used specifically for Tags.
+                 *
-                 * @since 2.3.0
-                 * @deprecated 3.1.0 Use 'post_tag_rewrite_rules' instead
+                 *
-                 * @param array $rules The rewrite rules generated for tags.
-                 */
-                $rules = apply_filters( 'tag_rewrite_rules', $rules );
+            }
-            $this->extra_rules_top = array_merge($this->extra_rules_top, $rules);
+        }
-        // Put them together.
-        if ( $this->use_verbose_page_rules )
-            $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite,  $author_rewrite, $date_rewrite, $page_rewrite, $post_rewrite, $this->extra_rules);
-        else
-            $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite,  $author_rewrite, $date_rewrite, $post_rewrite, $page_rewrite, $this->extra_rules);
-        /**
-         * Fires after the rewrite rules are generated.
+         *
-         * @since 1.5.0
+         *
-         * @param WP_Rewrite $this Current WP_Rewrite instance, passed by reference.
-         */
-        do_action_ref_array( 'generate_rewrite_rules', array( &$this ) );
-        /**
-         * Filter the full set of generated rewrite rules.
+         *
-         * @since 1.5.0
+         *
-         * @param array $this->rules The compiled array of rewrite rules.
-         */
-        $this->rules = apply_filters( 'rewrite_rules_array', $this->rules );
-        return $this->rules;
+    }
-    /**
-     * Retrieve the rewrite rules.
+     *
-     * The difference between this method and {@link
-     * WP_Rewrite::rewrite_rules()} is that this method stores the rewrite rules
-     * in the 'rewrite_rules' option and retrieves it. This prevents having to
-     * process all of the permalinks to get the rewrite rules in the form of
-     * caching.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return array Rewrite rules.
-     */
-    public function wp_rewrite_rules() {
-        $this->rules = get_option('rewrite_rules');
-        if ( empty($this->rules) ) {
-            $this->matches = 'matches';
-            $this->rewrite_rules();
-            update_option('rewrite_rules', $this->rules);
+        }
-        return $this->rules;
+    }
-    /**
-     * Retrieve mod_rewrite formatted rewrite rules to write to .htaccess.
+     *
-     * Does not actually write to the .htaccess file, but creates the rules for
-     * the process that will.
+     *
-     * Will add the non_wp_rules property rules to the .htaccess file before
-     * the WordPress rewrite rules one.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string
-     */
-    public function mod_rewrite_rules() {
-        if ( ! $this->using_permalinks() )
-            return '';
-        $site_root = parse_url( site_url() );
-        if ( isset( $site_root['path'] ) )
-            $site_root = trailingslashit($site_root['path']);
-        $home_root = parse_url(home_url());
-        if ( isset( $home_root['path'] ) )
-            $home_root = trailingslashit($home_root['path']);
-        else
-            $home_root = '/';
-        $rules = "<IfModule mod_rewrite.c>\n";
-        $rules .= "RewriteEngine On\n";
-        $rules .= "RewriteBase $home_root\n";
-        $rules .= "RewriteRule ^index\.php$ - [L]\n"; // Prevent -f checks on index.php.
-        //add in the rules that don't redirect to WP's index.php (and thus shouldn't be handled by WP at all)
-        foreach ( (array) $this->non_wp_rules as $match => $query) {
-            // Apache 1.3 does not support the reluctant (non-greedy) modifier.
-            $match = str_replace('.+?', '.+', $match);
-            // If the match is unanchored and greedy, prepend rewrite conditions
-            // to avoid infinite redirects and eclipsing of real files.
-            //if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
-                //nada.
-            //}
-            $rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
+        }
-        if ( $this->use_verbose_rules ) {
-            $this->matches = '';
-            $rewrite = $this->rewrite_rules();
-            $num_rules = count($rewrite);
-            $rules .= "RewriteCond %{REQUEST_FILENAME} -f [OR]\n" .
-                "RewriteCond %{REQUEST_FILENAME} -d\n" .
-                "RewriteRule ^.*$ - [S=$num_rules]\n";
-            foreach ( (array) $rewrite as $match => $query) {
-                // Apache 1.3 does not support the reluctant (non-greedy) modifier.
-                $match = str_replace('.+?', '.+', $match);
-                // If the match is unanchored and greedy, prepend rewrite conditions
-                // to avoid infinite redirects and eclipsing of real files.
-                //if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
-                    //nada.
-                //}
-                if ( strpos($query, $this->index) !== false )
-                    $rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
-                else
-                    $rules .= 'RewriteRule ^' . $match . ' ' . $site_root . $query . " [QSA,L]\n";
+            }
-        } else {
-            $rules .= "RewriteCond %{REQUEST_FILENAME} !-f\n" .
-                "RewriteCond %{REQUEST_FILENAME} !-d\n" .
-                "RewriteRule . {$home_root}{$this->index} [L]\n";
+        }
-        $rules .= "</IfModule>\n";
-        /**
+         *
-         * Filter the list of rewrite rules formatted for output to an .htaccess file.
+         *
-         * @since 1.5.0
+         *
-         * @param string $rules mod_rewrite Rewrite rules formatted for .htaccess.
-         */
-        $rules = apply_filters( 'mod_rewrite_rules', $rules );
-        /**
-         * Filter the list of rewrite rules formatted for output to an .htaccess file.
+         *
-         * @since 1.5.0
-         * @deprecated 1.5.0 Use the mod_rewrite_rules filter instead.
+         *
-         * @param string $rules mod_rewrite Rewrite rules formatted for .htaccess.
-         */
-        return apply_filters( 'rewrite_rules', $rules );
+    }
-    /**
-     * Retrieve IIS7 URL Rewrite formatted rewrite rules to write to web.config file.
+     *
-     * Does not actually write to the web.config file, but creates the rules for
-     * the process that will.
+     *
-     * @since 2.8.0
-     * @access public
+     *
-     * @return string
-     */
-    public function iis7_url_rewrite_rules( $add_parent_tags = false ) {
-        if ( ! $this->using_permalinks() )
-            return '';
-        $rules = '';
-        if ( $add_parent_tags ) {
-            $rules .= '<configuration>
-    <system.webServer>
-        <rewrite>
-            <rules>';
+        }
-        $rules .= '
-            <rule name="wordpress" patternSyntax="Wildcard">
-                <match url="*" />
-                    <conditions>
-                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
-                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
-                    </conditions>
-                <action type="Rewrite" url="index.php" />
-            </rule>';
-        if ( $add_parent_tags ) {
-            $rules .= '
-            </rules>
-        </rewrite>
-    </system.webServer>
-</configuration>';
+        }
-        /**
-         * Filter the list of rewrite rules formatted for output to a web.config.
+         *
-         * @since 2.8.0
+         *
-         * @param string $rules Rewrite rules formatted for IIS web.config.
-         */
-        return apply_filters( 'iis7_url_rewrite_rules', $rules );
+    }
-    /**
-     * Add a straight rewrite rule.
+     *
-     * Any value in the $after parameter that isn't 'bottom' will be placed at
-     * the top of the rules.
+     *
-     * @since 2.1.0
-     * @access public
+     *
-     * @param string $regex    Regular expression to match against request.
-     * @param string $redirect URL regex redirects to when regex matches request.
-     * @param string $after    Optional, default is bottom. Location to place rule.
-     */
-    public function add_rule($regex, $redirect, $after = 'bottom') {
-        //get everything up to the first ?
-        $index = (strpos($redirect, '?') === false ? strlen($redirect) : strpos($redirect, '?'));
-        $front = substr($redirect, 0, $index);
-        if ( $front != $this->index ) { //it doesn't redirect to WP's index.php
-            $this->add_external_rule($regex, $redirect);
-        } else {
-            if ( 'bottom' == $after)
-                $this->extra_rules = array_merge($this->extra_rules, array($regex => $redirect));
-            else
-                $this->extra_rules_top = array_merge($this->extra_rules_top, array($regex => $redirect));
-            //$this->extra_rules[$regex] = $redirect;
+        }
+    }
-    /**
-     * Add a rule that doesn't redirect to index.php.
+     *
-     * Can redirect to any place.
+     *
-     * @since 2.1.0
-     * @access public
+     *
-     * @param string $regex    Regular expression to match against request.
-     * @param string $redirect URL regex redirects to when regex matches request.
-     */
-    public function add_external_rule($regex, $redirect) {
-        $this->non_wp_rules[$regex] = $redirect;
+    }
-    /**
-     * Add an endpoint, like /trackback/.
+     *
-     * @since 2.1.0
-     * @since 3.9.0 $query_var parameter added.
-     * @since 4.3.0 Added support for skipping query var registration by passing `false` to `$query_var`.
-     * @access public
+     *
-     * @see add_rewrite_endpoint() for full documentation.
+     *
-     * @global WP $wp
+     *
-     * @param string      $name      Name of the endpoint.
-     * @param int         $places    Endpoint mask describing the places the endpoint should be added.
-     * @param string|bool $query_var Optional. Name of the corresponding query variable. Pass `false` to
-     *                               skip registering a query_var for this endpoint. Defaults to the
-     *                               value of `$name`.
-     */
-    public function add_endpoint( $name, $places, $query_var = true ) {
-        global $wp;
-        // For backward compatibility, if `null` has explicitly been passed as `$query_var`, assume `true`.
-        if ( true === $query_var || null === func_get_arg( 2 ) ) {
-            $query_var = $name;
+        }
-        $this->endpoints[] = array( $places, $name, $query_var );
-        if ( $query_var ) {
-            $wp->add_query_var( $query_var );
+        }
+    }
-    /**
-     * Add a new permalink structure.
+     *
-     * A permalink structure (permastruct) is an abstract definition of a set of rewrite rules; it
-     * is an easy way of expressing a set of regular expressions that rewrite to a set of query strings.
-     * The new permastruct is added to the {@link WP_Rewrite::$extra_permastructs} array. When the
-     * rewrite rules are built by {@link WP_Rewrite::rewrite_rules()} all of these extra permastructs
-     * are passed to {@link WP_Rewrite::generate_rewrite_rules()} which transforms them into the
-     * regular expressions that many love to hate.
+     *
-     * The $args parameter gives you control over how {@link WP_Rewrite::generate_rewrite_rules()}
-     * works on the new permastruct.
+     *
-     * @since 2.5.0
-     * @access public
+     *
-     * @param string $name   Name for permalink structure.
-     * @param string $struct Permalink structure (e.g. category/%category%)
-     * @param array  $args   Optional configuration for building the rules from the permalink structure:
-     *     - with_front (bool) - Should the structure be prepended with WP_Rewrite::$front? Default is true.
-     *     - ep_mask (int) - Endpoint mask defining what endpoints are added to the structure. Default is EP_NONE.
-     *     - paged (bool) - Should archive pagination rules be added for the structure? Default is true.
-     *     - feed (bool) - Should feed rewrite rules be added for the structure? Default is true.
-     *     - forcomments (bool) - Should the feed rules be a query for a comments feed? Default is false.
-     *     - walk_dirs (bool) - Should the 'directories' making up the structure be walked over and rewrite
-     *                          rules built for each in turn? Default is true.
-     *     - endpoints (bool) - Should endpoints be applied to the generated rewrite rules? Default is true.
-     */
-    public function add_permastruct( $name, $struct, $args = array() ) {
-        // backwards compatibility for the old parameters: $with_front and $ep_mask
-        if ( ! is_array( $args ) )
-            $args = array( 'with_front' => $args );
-        if ( func_num_args() == 4 )
-            $args['ep_mask'] = func_get_arg( 3 );
-        $defaults = array(
-            'with_front' => true,
-            'ep_mask' => EP_NONE,
-            'paged' => true,
-            'feed' => true,
-            'forcomments' => false,
-            'walk_dirs' => true,
-            'endpoints' => true,
-        );
-        $args = array_intersect_key( $args, $defaults );
-        $args = wp_parse_args( $args, $defaults );
-        if ( $args['with_front'] )
-            $struct = $this->front . $struct;
-        else
-            $struct = $this->root . $struct;
-        $args['struct'] = $struct;
-        $this->extra_permastructs[ $name ] = $args;
+    }
-    /**
-     * Remove rewrite rules and then recreate rewrite rules.
+     *
-     * Calls {@link WP_Rewrite::wp_rewrite_rules()} after removing the
-     * 'rewrite_rules' option. If the function named 'save_mod_rewrite_rules'
-     * exists, it will be called.
+     *
-     * @since 2.0.1
-     * @access public
+     *
-     * @staticvar bool $do_hard_later
+     *
-     * @param bool $hard Whether to update .htaccess (hard flush) or just update rewrite_rules option (soft flush). Default is true (hard).
-     */
-    public function flush_rules( $hard = true ) {
-        static $do_hard_later = null;
-        // Prevent this action from running before everyone has registered their rewrites
-        if ( ! did_action( 'wp_loaded' ) ) {
-            add_action( 'wp_loaded', array( $this, 'flush_rules' ) );
-            $do_hard_later = ( isset( $do_hard_later ) ) ? $do_hard_later || $hard : $hard;
-            return;
+        }
-        if ( isset( $do_hard_later ) ) {
-            $hard = $do_hard_later;
-            unset( $do_hard_later );
+        }
-        delete_option('rewrite_rules');
-        $this->wp_rewrite_rules();
-        /**
-         * Filter whether a "hard" rewrite rule flush should be performed when requested.
+         *
-         * A "hard" flush updates .htaccess (Apache) or web.config (IIS).
+         *
-         * @since 3.7.0
+         *
-         * @param bool $hard Whether to flush rewrite rules "hard". Default true.
-         */
-        if ( ! $hard || ! apply_filters( 'flush_rewrite_rules_hard', true ) ) {
-            return;
+        }
-        if ( function_exists( 'save_mod_rewrite_rules' ) )
-            save_mod_rewrite_rules();
-        if ( function_exists( 'iis7_save_url_rewrite_rules' ) )
-            iis7_save_url_rewrite_rules();
+    }
-    /**
-     * Sets up the object's properties.
+     *
-     * The 'use_verbose_page_rules' object property will be set to true if the
-     * permalink structure begins with one of the following: '%postname%', '%category%',
-     * '%tag%', or '%author%'.
+     *
-     * @since 1.5.0
-     * @access public
-     */
-    public function init() {
-        $this->extra_rules = $this->non_wp_rules = $this->endpoints = array();
-        $this->permalink_structure = get_option('permalink_structure');
-        $this->front = substr($this->permalink_structure, 0, strpos($this->permalink_structure, '%'));
-        $this->root = '';
-        if ( $this->using_index_permalinks() )
-            $this->root = $this->index . '/';
-        unset($this->author_structure);
-        unset($this->date_structure);
-        unset($this->page_structure);
-        unset($this->search_structure);
-        unset($this->feed_structure);
-        unset($this->comment_feed_structure);
-        $this->use_trailing_slashes = ( '/' == substr($this->permalink_structure, -1, 1) );
-        // Enable generic rules for pages if permalink structure doesn't begin with a wildcard.
-        if ( preg_match("/^[^%]*%(?:postname|category|tag|author)%/", $this->permalink_structure) )
-             $this->use_verbose_page_rules = true;
-        else
-            $this->use_verbose_page_rules = false;
+    }
-    /**
-     * Set the main permalink structure for the blog.
+     *
-     * Will update the 'permalink_structure' option, if there is a difference
-     * between the current permalink structure and the parameter value. Calls
-     * {@link WP_Rewrite::init()} after the option is updated.
+     *
-     * Fires the 'permalink_structure_changed' action once the init call has
-     * processed passing the old and new values
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $permalink_structure Permalink structure.
-     */
-    public function set_permalink_structure($permalink_structure) {
-        if ( $permalink_structure != $this->permalink_structure ) {
-            $old_permalink_structure = $this->permalink_structure;
-            update_option('permalink_structure', $permalink_structure);
-            $this->init();
-            /**
-             * Fires after the permalink structure is updated.
+             *
-             * @since 2.8.0
+             *
-             * @param string $old_permalink_structure The previous permalink structure.
-             * @param string $permalink_structure     The new permalink structure.
-             */
-            do_action( 'permalink_structure_changed', $old_permalink_structure, $permalink_structure );
+        }
+    }
-    /**
-     * Set the category base for the category permalink.
+     *
-     * Will update the 'category_base' option, if there is a difference between
-     * the current category base and the parameter value. Calls
-     * {@link WP_Rewrite::init()} after the option is updated.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $category_base Category permalink structure base.
-     */
-    public function set_category_base($category_base) {
-        if ( $category_base != get_option('category_base') ) {
-            update_option('category_base', $category_base);
-            $this->init();
+        }
+    }
-    /**
-     * Set the tag base for the tag permalink.
+     *
-     * Will update the 'tag_base' option, if there is a difference between the
-     * current tag base and the parameter value. Calls
-     * {@link WP_Rewrite::init()} after the option is updated.
+     *
-     * @since 2.3.0
-     * @access public
+     *
-     * @param string $tag_base Tag permalink structure base.
-     */
-    public function set_tag_base( $tag_base ) {
-        if ( $tag_base != get_option( 'tag_base') ) {
-            update_option( 'tag_base', $tag_base );
-            $this->init();
+        }
+    }
-    /**
-     * Constructor - Calls init(), which runs setup.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     */
-    public function __construct() {
-        $this->init();
+    }
+}

trunk/src/wp-includes/rewrite-functions.php

-                      r33746
+                      r33751
     $wp_rewrite->flush_rules( $hard );
+}
-/**
- * Endpoint Mask for default, which is nothing.
+ *
- * @since 2.1.0
- */
-define('EP_NONE', 0);
-/**
- * Endpoint Mask for Permalink.
+ *
- * @since 2.1.0
- */
-define('EP_PERMALINK', 1);
-/**
- * Endpoint Mask for Attachment.
+ *
- * @since 2.1.0
- */
-define('EP_ATTACHMENT', 2);
-/**
- * Endpoint Mask for date.
+ *
- * @since 2.1.0
- */
-define('EP_DATE', 4);
-/**
- * Endpoint Mask for year
+ *
- * @since 2.1.0
- */
-define('EP_YEAR', 8);
-/**
- * Endpoint Mask for month.
+ *
- * @since 2.1.0
- */
-define('EP_MONTH', 16);
-/**
- * Endpoint Mask for day.
+ *
- * @since 2.1.0
- */
-define('EP_DAY', 32);
-/**
- * Endpoint Mask for root.
+ *
- * @since 2.1.0
- */
-define('EP_ROOT', 64);
-/**
- * Endpoint Mask for comments.
+ *
- * @since 2.1.0
- */
-define('EP_COMMENTS', 128);
-/**
- * Endpoint Mask for searches.
+ *
- * @since 2.1.0
- */
-define('EP_SEARCH', 256);
-/**
- * Endpoint Mask for categories.
+ *
- * @since 2.1.0
- */
-define('EP_CATEGORIES', 512);
-/**
- * Endpoint Mask for tags.
+ *
- * @since 2.3.0
- */
-define('EP_TAGS', 1024);
-/**
- * Endpoint Mask for authors.
+ *
- * @since 2.1.0
- */
-define('EP_AUTHORS', 2048);
-/**
- * Endpoint Mask for pages.
+ *
- * @since 2.1.0
- */
-define('EP_PAGES', 4096);
-/**
- * Endpoint Mask for all archive views.
+ *
- * @since 3.7.0
- */
-define( 'EP_ALL_ARCHIVES', EP_DATE | EP_YEAR | EP_MONTH | EP_DAY | EP_CATEGORIES | EP_TAGS | EP_AUTHORS );
-/**
- * Endpoint Mask for everything.
+ *
- * @since 2.1.0
- */
-define( 'EP_ALL', EP_PERMALINK | EP_ATTACHMENT | EP_ROOT | EP_COMMENTS | EP_SEARCH | EP_PAGES | EP_ALL_ARCHIVES );
 /**
 …
     return 0;
+}
-/**
- * WordPress Rewrite Component.
+ *
- * The WordPress Rewrite class writes the rewrite module rules to the .htaccess
- * file. It also handles parsing the request to get the correct setup for the
- * WordPress Query class.
+ *
- * The Rewrite along with WP class function as a front controller for WordPress.
- * You can add rules to trigger your page view and processing using this
- * component. The full functionality of a front controller does not exist,
- * meaning you can't define how the template files load based on the rewrite
- * rules.
+ *
- * @since 1.5.0
- */
-class WP_Rewrite {
-    /**
-     * Permalink structure for posts.
+     *
-     * @since 1.5.0
-     * @var string
-     */
-    public $permalink_structure;
-    /**
-     * Whether to add trailing slashes.
+     *
-     * @since 2.2.0
-     * @var bool
-     */
-    public $use_trailing_slashes;
-    /**
-     * Base for the author permalink structure (example.com/$author_base/authorname).
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $author_base = 'author';
-    /**
-     * Permalink structure for author archives.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $author_structure;
-    /**
-     * Permalink structure for date archives.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $date_structure;
-    /**
-     * Permalink structure for pages.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $page_structure;
-    /**
-     * Base of the search permalink structure (example.com/$search_base/query).
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $search_base = 'search';
-    /**
-     * Permalink structure for searches.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $search_structure;
-    /**
-     * Comments permalink base.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $comments_base = 'comments';
-    /**
-     * Pagination permalink base.
+     *
-     * @since 3.1.0
-     * @var string
-     */
-    public $pagination_base = 'page';
-    /**
-     * Comments pagination permalink base.
+     *
-     * @since 4.2.0
-     * @access private
-     * @var string
-     */
-    var $comments_pagination_base = 'comment-page';
-    /**
-     * Feed permalink base.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $feed_base = 'feed';
-    /**
-     * Comments feed permalink structure.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $comment_feed_structure;
-    /**
-     * Feed request permalink structure.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $feed_structure;
-    /**
-     * The static portion of the post permalink structure.
+     *
-     * If the permalink structure is "/archive/%post_id%" then the front
-     * is "/archive/". If the permalink structure is "/%year%/%postname%/"
-     * then the front is "/".
+     *
-     * @see WP_Rewrite::init()
-     * @since 1.5.0
-     * @var string
-     */
-    public $front;
-    /**
-     * The prefix for all permalink structures.
+     *
-     * If PATHINFO/index permalinks are in use then the root is the value of
-     * {@link WP_Rewrite::$index} with a trailing slash appended. Otherwise
-     * the root will be empty.
+     *
-     * @see WP_Rewrite::init()
-     * @see WP_Rewrite::using_index_permalinks()
-     * @since 1.5.0
-     * @var string
-     */
-    public $root = '';
-    /**
-     * The name of the index file which is the entry point to all requests.
+     *
-     * @since 1.5.0
-     * @access public
-     * @var string
-     */
-    public $index = 'index.php';
-    /**
-     * Variable name to use for regex matches in the rewritten query.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var string
-     */
-    var $matches = '';
-    /**
-     * Rewrite rules to match against the request to find the redirect or query.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var array
-     */
-    var $rules;
-    /**
-     * Additional rules added external to the rewrite class.
+     *
-     * Those not generated by the class, see add_rewrite_rule().
+     *
-     * @since 2.1.0
-     * @access private
-     * @var array
-     */
-    var $extra_rules = array();
-    /**
-     * Additional rules that belong at the beginning to match first.
+     *
-     * Those not generated by the class, see add_rewrite_rule().
+     *
-     * @since 2.3.0
-     * @access private
-     * @var array
-     */
-    var $extra_rules_top = array();
-    /**
-     * Rules that don't redirect to WordPress' index.php.
+     *
-     * These rules are written to the mod_rewrite portion of the .htaccess,
-     * and are added by {@link add_external_rule()}.
+     *
-     * @since 2.1.0
-     * @access private
-     * @var array
-     */
-    var $non_wp_rules = array();
-    /**
-     * Extra permalink structures, e.g. categories, added by {@link add_permastruct()}.
+     *
-     * @since 2.1.0
-     * @access private
-     * @var array
-     */
-    var $extra_permastructs = array();
-    /**
-     * Endpoints (like /trackback/) added by {@link add_rewrite_endpoint()}.
+     *
-     * @since 2.1.0
-     * @access private
-     * @var array
-     */
-    var $endpoints;
-    /**
-     * Whether to write every mod_rewrite rule for WordPress into the .htaccess file.
+     *
-     * This is off by default, turning it on might print a lot of rewrite rules
-     * to the .htaccess file.
+     *
-     * @see WP_Rewrite::mod_rewrite_rules()
-     * @since 2.0.0
-     * @access public
-     * @var bool
-     */
-    public $use_verbose_rules = false;
-    /**
-     * Could post permalinks be confused with those of pages?
+     *
-     * If the first rewrite tag in the post permalink structure is one that could
-     * also match a page name (e.g. %postname% or %author%) then this flag is
-     * set to true. Prior to WordPress 3.3 this flag indicated that every page
-     * would have a set of rules added to the top of the rewrite rules array.
-     * Now it tells {@link WP::parse_request()} to check if a URL matching the
-     * page permastruct is actually a page before accepting it.
+     *
-     * @link https://core.trac.wordpress.org/ticket/16687
-     * @see WP_Rewrite::init()
-     * @since 2.5.0
-     * @access public
-     * @var bool
-     */
-    public $use_verbose_page_rules = true;
-    /**
-     * Rewrite tags that can be used in permalink structures.
+     *
-     * These are translated into the regular expressions stored in
-     * {@link WP_Rewrite::$rewritereplace} and are rewritten to the
-     * query variables listed in {@link WP_Rewrite::$queryreplace}.
+     *
-     * Additional tags can be added with {@link add_rewrite_tag()}.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var array
-     */
-    var $rewritecode = array(
-        '%year%',
-        '%monthnum%',
-        '%day%',
-        '%hour%',
-        '%minute%',
-        '%second%',
-        '%postname%',
-        '%post_id%',
-        '%author%',
-        '%pagename%',
-        '%search%'
-    );
-    /**
-     * Regular expressions to be substituted into rewrite rules in place
-     * of rewrite tags, see {@link WP_Rewrite::$rewritecode}.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var array
-     */
-    var $rewritereplace = array(
-        '([0-9]{4})',
-        '([0-9]{1,2})',
-        '([0-9]{1,2})',
-        '([0-9]{1,2})',
-        '([0-9]{1,2})',
-        '([0-9]{1,2})',
-        '([^/]+)',
-        '([0-9]+)',
-        '([^/]+)',
-        '([^/]+?)',
-        '(.+)'
-    );
-    /**
-     * Query variables that rewrite tags map to, see {@link WP_Rewrite::$rewritecode}.
+     *
-     * @since 1.5.0
-     * @access private
-     * @var array
-     */
-    var $queryreplace = array(
-        'year=',
-        'monthnum=',
-        'day=',
-        'hour=',
-        'minute=',
-        'second=',
-        'name=',
-        'p=',
-        'author_name=',
-        'pagename=',
-        's='
-    );
-    /**
-     * Supported default feeds.
+     *
-     * @since 1.5.0
-     * @var array
-     */
-    public $feeds = array( 'feed', 'rdf', 'rss', 'rss2', 'atom' );
-    /**
-     * Whether permalinks are being used.
+     *
-     * This can be either rewrite module or permalink in the HTTP query string.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return bool True, if permalinks are enabled.
-     */
-    public function using_permalinks() {
-        return ! empty($this->permalink_structure);
+    }
-    /**
-     * Whether permalinks are being used and rewrite module is not enabled.
+     *
-     * Means that permalink links are enabled and index.php is in the URL.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return bool
-     */
-    public function using_index_permalinks() {
-        if ( empty( $this->permalink_structure ) ) {
-            return false;
+        }
-        // If the index is not in the permalink, we're using mod_rewrite.
-        return preg_match( '#^/*' . $this->index . '#', $this->permalink_structure );
+    }
-    /**
-     * Whether permalinks are being used and rewrite module is enabled.
+     *
-     * Using permalinks and index.php is not in the URL.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return bool
-     */
-    public function using_mod_rewrite_permalinks() {
-        return $this->using_permalinks() && ! $this->using_index_permalinks();
+    }
-    /**
-     * Index for matches for usage in preg_*() functions.
+     *
-     * The format of the string is, with empty matches property value, '$NUM'.
-     * The 'NUM' will be replaced with the value in the $number parameter. With
-     * the matches property not empty, the value of the returned string will
-     * contain that value of the matches property. The format then will be
-     * '$MATCHES[NUM]', with MATCHES as the value in the property and NUM the
-     * value of the $number parameter.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @param int $number Index number.
-     * @return string
-     */
-    public function preg_index($number) {
-        $match_prefix = '$';
-        $match_suffix = '';
-        if ( ! empty($this->matches) ) {
-            $match_prefix = '$' . $this->matches . '[';
-            $match_suffix = ']';
+        }
-        return "$match_prefix$number$match_suffix";
+    }
-    /**
-     * Retrieve all page and attachments for pages URIs.
+     *
-     * The attachments are for those that have pages as parents and will be
-     * retrieved.
+     *
-     * @since 2.5.0
-     * @access public
+     *
-     * @global wpdb $wpdb
+     *
-     * @return array Array of page URIs as first element and attachment URIs as second element.
-     */
-    public function page_uri_index() {
-        global $wpdb;
-        //get pages in order of hierarchy, i.e. children after parents
-        $pages = $wpdb->get_results("SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_type = 'page' AND post_status != 'auto-draft'");
-        $posts = get_page_hierarchy( $pages );
-        // If we have no pages get out quick
-        if ( !$posts )
-            return array( array(), array() );
-        //now reverse it, because we need parents after children for rewrite rules to work properly
-        $posts = array_reverse($posts, true);
-        $page_uris = array();
-        $page_attachment_uris = array();
-        foreach ( $posts as $id => $post ) {
-            // URL => page name
-            $uri = get_page_uri($id);
-            $attachments = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_type = 'attachment' AND post_parent = %d", $id ));
-            if ( !empty($attachments) ) {
-                foreach ( $attachments as $attachment ) {
-                    $attach_uri = get_page_uri($attachment->ID);
-                    $page_attachment_uris[$attach_uri] = $attachment->ID;
+                }
+            }
-            $page_uris[$uri] = $id;
+        }
-        return array( $page_uris, $page_attachment_uris );
+    }
-    /**
-     * Retrieve all of the rewrite rules for pages.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return array
-     */
-    public function page_rewrite_rules() {
-        // the extra .? at the beginning prevents clashes with other regular expressions in the rules array
-        $this->add_rewrite_tag( '%pagename%', '(.?.+?)', 'pagename=' );
-        return $this->generate_rewrite_rules( $this->get_page_permastruct(), EP_PAGES, true, true, false, false );
+    }
-    /**
-     * Retrieve date permalink structure, with year, month, and day.
+     *
-     * The permalink structure for the date, if not set already depends on the
-     * permalink structure. It can be one of three formats. The first is year,
-     * month, day; the second is day, month, year; and the last format is month,
-     * day, year. These are matched against the permalink structure for which
-     * one is used. If none matches, then the default will be used, which is
-     * year, month, day.
+     *
-     * Prevents post ID and date permalinks from overlapping. In the case of
-     * post_id, the date permalink will be prepended with front permalink with
-     * 'date/' before the actual permalink to form the complete date permalink
-     * structure.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False on no permalink structure. Date permalink structure.
-     */
-    public function get_date_permastruct() {
-        if ( isset($this->date_structure) )
-            return $this->date_structure;
-        if ( empty($this->permalink_structure) ) {
-            $this->date_structure = '';
-            return false;
+        }
-        // The date permalink must have year, month, and day separated by slashes.
-        $endians = array('%year%/%monthnum%/%day%', '%day%/%monthnum%/%year%', '%monthnum%/%day%/%year%');
-        $this->date_structure = '';
-        $date_endian = '';
-        foreach ( $endians as $endian ) {
-            if ( false !== strpos($this->permalink_structure, $endian) ) {
-                $date_endian= $endian;
-                break;
+            }
+        }
-        if ( empty($date_endian) )
-            $date_endian = '%year%/%monthnum%/%day%';
-        // Do not allow the date tags and %post_id% to overlap in the permalink
-        // structure. If they do, move the date tags to $front/date/.
-        $front = $this->front;
-        preg_match_all('/%.+?%/', $this->permalink_structure, $tokens);
-        $tok_index = 1;
-        foreach ( (array) $tokens[0] as $token) {
-            if ( '%post_id%' == $token && ($tok_index <= 3) ) {
-                $front = $front . 'date/';
-                break;
+            }
-            $tok_index++;
+        }
-        $this->date_structure = $front . $date_endian;
-        return $this->date_structure;
+    }
-    /**
-     * Retrieve the year permalink structure without month and day.
+     *
-     * Gets the date permalink structure and strips out the month and day
-     * permalink structures.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return false|string False on failure. Year structure on success.
-     */
-    public function get_year_permastruct() {
-        $structure = $this->get_date_permastruct();
-        if ( empty($structure) )
-            return false;
-        $structure = str_replace('%monthnum%', '', $structure);
-        $structure = str_replace('%day%', '', $structure);
-        $structure = preg_replace('#/+#', '/', $structure);
-        return $structure;
+    }
-    /**
-     * Retrieve the month permalink structure without day and with year.
+     *
-     * Gets the date permalink structure and strips out the day permalink
-     * structures. Keeps the year permalink structure.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return false|string False on failure. Year/Month structure on success.
-     */
-    public function get_month_permastruct() {
-        $structure = $this->get_date_permastruct();
-        if ( empty($structure) )
-            return false;
-        $structure = str_replace('%day%', '', $structure);
-        $structure = preg_replace('#/+#', '/', $structure);
-        return $structure;
+    }
-    /**
-     * Retrieve the day permalink structure with month and year.
+     *
-     * Keeps date permalink structure with all year, month, and day.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False on failure. Year/Month/Day structure on success.
-     */
-    public function get_day_permastruct() {
-        return $this->get_date_permastruct();
+    }
-    /**
-     * Retrieve the permalink structure for categories.
+     *
-     * If the category_base property has no value, then the category structure
-     * will have the front property value, followed by 'category', and finally
-     * '%category%'. If it does, then the root property will be used, along with
-     * the category_base property value.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False on failure. Category permalink structure.
-     */
-    public function get_category_permastruct() {
-        return $this->get_extra_permastruct('category');
+    }
-    /**
-     * Retrieve the permalink structure for tags.
+     *
-     * If the tag_base property has no value, then the tag structure will have
-     * the front property value, followed by 'tag', and finally '%tag%'. If it
-     * does, then the root property will be used, along with the tag_base
-     * property value.
+     *
-     * @since 2.3.0
-     * @access public
+     *
-     * @return string|false False on failure. Tag permalink structure.
-     */
-    public function get_tag_permastruct() {
-        return $this->get_extra_permastruct('post_tag');
+    }
-    /**
-     * Retrieve extra permalink structure by name.
+     *
-     * @since 2.5.0
-     * @access public
+     *
-     * @param string $name Permalink structure name.
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_extra_permastruct($name) {
-        if ( empty($this->permalink_structure) )
-            return false;
-        if ( isset($this->extra_permastructs[$name]) )
-            return $this->extra_permastructs[$name]['struct'];
-        return false;
+    }
-    /**
-     * Retrieve the author permalink structure.
+     *
-     * The permalink structure is front property, author base, and finally
-     * '/%author%'. Will set the author_structure property and then return it
-     * without attempting to set the value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_author_permastruct() {
-        if ( isset($this->author_structure) )
-            return $this->author_structure;
-        if ( empty($this->permalink_structure) ) {
-            $this->author_structure = '';
-            return false;
+        }
-        $this->author_structure = $this->front . $this->author_base . '/%author%';
-        return $this->author_structure;
+    }
-    /**
-     * Retrieve the search permalink structure.
+     *
-     * The permalink structure is root property, search base, and finally
-     * '/%search%'. Will set the search_structure property and then return it
-     * without attempting to set the value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_search_permastruct() {
-        if ( isset($this->search_structure) )
-            return $this->search_structure;
-        if ( empty($this->permalink_structure) ) {
-            $this->search_structure = '';
-            return false;
+        }
-        $this->search_structure = $this->root . $this->search_base . '/%search%';
-        return $this->search_structure;
+    }
-    /**
-     * Retrieve the page permalink structure.
+     *
-     * The permalink structure is root property, and '%pagename%'. Will set the
-     * page_structure property and then return it without attempting to set the
-     * value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_page_permastruct() {
-        if ( isset($this->page_structure) )
-            return $this->page_structure;
-        if (empty($this->permalink_structure)) {
-            $this->page_structure = '';
-            return false;
+        }
-        $this->page_structure = $this->root . '%pagename%';
-        return $this->page_structure;
+    }
-    /**
-     * Retrieve the feed permalink structure.
+     *
-     * The permalink structure is root property, feed base, and finally
-     * '/%feed%'. Will set the feed_structure property and then return it
-     * without attempting to set the value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_feed_permastruct() {
-        if ( isset($this->feed_structure) )
-            return $this->feed_structure;
-        if ( empty($this->permalink_structure) ) {
-            $this->feed_structure = '';
-            return false;
+        }
-        $this->feed_structure = $this->root . $this->feed_base . '/%feed%';
-        return $this->feed_structure;
+    }
-    /**
-     * Retrieve the comment feed permalink structure.
+     *
-     * The permalink structure is root property, comment base property, feed
-     * base and finally '/%feed%'. Will set the comment_feed_structure property
-     * and then return it without attempting to set the value again.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string|false False if not found. Permalink structure string.
-     */
-    public function get_comment_feed_permastruct() {
-        if ( isset($this->comment_feed_structure) )
-            return $this->comment_feed_structure;
-        if (empty($this->permalink_structure)) {
-            $this->comment_feed_structure = '';
-            return false;
+        }
-        $this->comment_feed_structure = $this->root . $this->comments_base . '/' . $this->feed_base . '/%feed%';
-        return $this->comment_feed_structure;
+    }
-    /**
-     * Add or update existing rewrite tags (e.g. %postname%).
+     *
-     * If the tag already exists, replace the existing pattern and query for
-     * that tag, otherwise add the new tag.
+     *
-     * @see WP_Rewrite::$rewritecode
-     * @see WP_Rewrite::$rewritereplace
-     * @see WP_Rewrite::$queryreplace
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $tag   Name of the rewrite tag to add or update.
-     * @param string $regex Regular expression to substitute the tag for in rewrite rules.
-     * @param string $query String to append to the rewritten query. Must end in '='.
-     */
-    public function add_rewrite_tag( $tag, $regex, $query ) {
-        $position = array_search( $tag, $this->rewritecode );
-        if ( false !== $position && null !== $position ) {
-            $this->rewritereplace[ $position ] = $regex;
-            $this->queryreplace[ $position ] = $query;
-        } else {
-            $this->rewritecode[] = $tag;
-            $this->rewritereplace[] = $regex;
-            $this->queryreplace[] = $query;
+        }
+    }
-    /**
-     * Generate rewrite rules from a permalink structure.
+     *
-     * The main WP_Rewrite function for building the rewrite rule list. The
-     * contents of the function is a mix of black magic and regular expressions,
-     * so best just ignore the contents and move to the parameters.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $permalink_structure The permalink structure.
-     * @param int    $ep_mask             Endpoint mask defining what endpoints are added to the structure. Default is EP_NONE.
-     * @param bool   $paged               Should archive pagination rules be added for the structure? Default is true.
-     * @param bool   $feed                Should feed rewrite rules be added for the structure? Default is true.
-     * @param bool   $forcomments         Should the feed rules be a query for a comments feed? Default is false.
-     * @param bool   $walk_dirs           Should the 'directories' making up the structure be walked over and rewrite rules
-     *                                    built for each in turn? Default is true.
-     * @param bool   $endpoints           Should endpoints be applied to the generated rewrite rules? Default is true.
-     * @return array Rewrite rule list.
-     */
-    public function generate_rewrite_rules($permalink_structure, $ep_mask = EP_NONE, $paged = true, $feed = true, $forcomments = false, $walk_dirs = true, $endpoints = true) {
-        //build a regex to match the feed section of URLs, something like (feed|atom|rss|rss2)/?
-        $feedregex2 = '';
-        foreach ( (array) $this->feeds as $feed_name)
-            $feedregex2 .= $feed_name . '|';
-        $feedregex2 = '(' . trim($feedregex2, '|') . ')/?$';
-        //$feedregex is identical but with /feed/ added on as well, so URLs like <permalink>/feed/atom
-        //and <permalink>/atom are both possible
-        $feedregex = $this->feed_base . '/' . $feedregex2;
-        //build a regex to match the trackback and page/xx parts of URLs
-        $trackbackregex = 'trackback/?$';
-        $pageregex = $this->pagination_base . '/?([0-9]{1,})/?$';
-        $commentregex = $this->comments_pagination_base . '-([0-9]{1,})/?$';
-        //build up an array of endpoint regexes to append => queries to append
-        if ( $endpoints ) {
-            $ep_query_append = array ();
-            foreach ( (array) $this->endpoints as $endpoint) {
-                //match everything after the endpoint name, but allow for nothing to appear there
-                $epmatch = $endpoint[1] . '(/(.*))?/?$';
-                //this will be appended on to the rest of the query for each dir
-                $epquery = '&' . $endpoint[2] . '=';
-                $ep_query_append[$epmatch] = array ( $endpoint[0], $epquery );
+            }
+        }
-        //get everything up to the first rewrite tag
-        $front = substr($permalink_structure, 0, strpos($permalink_structure, '%'));
-        //build an array of the tags (note that said array ends up being in $tokens[0])
-        preg_match_all('/%.+?%/', $permalink_structure, $tokens);
-        $num_tokens = count($tokens[0]);
-        $index = $this->index; //probably 'index.php'
-        $feedindex = $index;
-        $trackbackindex = $index;
-        //build a list from the rewritecode and queryreplace arrays, that will look something like
-        //tagname=$matches[i] where i is the current $i
-        $queries = array();
-        for ( $i = 0; $i < $num_tokens; ++$i ) {
-            if ( 0 < $i )
-                $queries[$i] = $queries[$i - 1] . '&';
-            else
-                $queries[$i] = '';
-            $query_token = str_replace($this->rewritecode, $this->queryreplace, $tokens[0][$i]) . $this->preg_index($i+1);
-            $queries[$i] .= $query_token;
+        }
-        //get the structure, minus any cruft (stuff that isn't tags) at the front
-        $structure = $permalink_structure;
-        if ( $front != '/' )
-            $structure = str_replace($front, '', $structure);
-        //create a list of dirs to walk over, making rewrite rules for each level
-        //so for example, a $structure of /%year%/%monthnum%/%postname% would create
-        //rewrite rules for /%year%/, /%year%/%monthnum%/ and /%year%/%monthnum%/%postname%
-        $structure = trim($structure, '/');
-        $dirs = $walk_dirs ? explode('/', $structure) : array( $structure );
-        $num_dirs = count($dirs);
-        //strip slashes from the front of $front
-        $front = preg_replace('|^/+|', '', $front);
-        //the main workhorse loop
-        $post_rewrite = array();
-        $struct = $front;
-        for ( $j = 0; $j < $num_dirs; ++$j ) {
-            //get the struct for this dir, and trim slashes off the front
-            $struct .= $dirs[$j] . '/'; //accumulate. see comment near explode('/', $structure) above
-            $struct = ltrim($struct, '/');
-            //replace tags with regexes
-            $match = str_replace($this->rewritecode, $this->rewritereplace, $struct);
-            //make a list of tags, and store how many there are in $num_toks
-            $num_toks = preg_match_all('/%.+?%/', $struct, $toks);
-            //get the 'tagname=$matches[i]'
-            $query = ( ! empty( $num_toks ) && isset( $queries[$num_toks - 1] ) ) ? $queries[$num_toks - 1] : '';
-            //set up $ep_mask_specific which is used to match more specific URL types
-            switch ( $dirs[$j] ) {
-                case '%year%':
-                    $ep_mask_specific = EP_YEAR;
-                    break;
-                case '%monthnum%':
-                    $ep_mask_specific = EP_MONTH;
-                    break;
-                case '%day%':
-                    $ep_mask_specific = EP_DAY;
-                    break;
-                default:
-                    $ep_mask_specific = EP_NONE;
+            }
-            //create query for /page/xx
-            $pagematch = $match . $pageregex;
-            $pagequery = $index . '?' . $query . '&paged=' . $this->preg_index($num_toks + 1);
-            //create query for /comment-page-xx
-            $commentmatch = $match . $commentregex;
-            $commentquery = $index . '?' . $query . '&cpage=' . $this->preg_index($num_toks + 1);
-            if ( get_option('page_on_front') ) {
-                //create query for Root /comment-page-xx
-                $rootcommentmatch = $match . $commentregex;
-                $rootcommentquery = $index . '?' . $query . '&page_id=' . get_option('page_on_front') . '&cpage=' . $this->preg_index($num_toks + 1);
+            }
-            //create query for /feed/(feed|atom|rss|rss2|rdf)
-            $feedmatch = $match . $feedregex;
-            $feedquery = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);
-            //create query for /(feed|atom|rss|rss2|rdf) (see comment near creation of $feedregex)
-            $feedmatch2 = $match . $feedregex2;
-            $feedquery2 = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);
-            //if asked to, turn the feed queries into comment feed ones
-            if ( $forcomments ) {
-                $feedquery .= '&withcomments=1';
-                $feedquery2 .= '&withcomments=1';
+            }
-            //start creating the array of rewrites for this dir
-            $rewrite = array();
-            if ( $feed ) //...adding on /feed/ regexes => queries
-                $rewrite = array($feedmatch => $feedquery, $feedmatch2 => $feedquery2);
-            if ( $paged ) //...and /page/xx ones
-                $rewrite = array_merge($rewrite, array($pagematch => $pagequery));
-            //only on pages with comments add ../comment-page-xx/
-            if ( EP_PAGES & $ep_mask || EP_PERMALINK & $ep_mask ) {
-                $rewrite = array_merge($rewrite, array($commentmatch => $commentquery));
-            } elseif ( EP_ROOT & $ep_mask && get_option('page_on_front') ) {
-                $rewrite = array_merge($rewrite, array($rootcommentmatch => $rootcommentquery));
+            }
-            //do endpoints
-            if ( $endpoints ) {
-                foreach ( (array) $ep_query_append as $regex => $ep) {
-                    //add the endpoints on if the mask fits
-                    if ( $ep[0] & $ep_mask || $ep[0] & $ep_mask_specific )
-                        $rewrite[$match . $regex] = $index . '?' . $query . $ep[1] . $this->preg_index($num_toks + 2);
+                }
+            }
-            //if we've got some tags in this dir
-            if ( $num_toks ) {
-                $post = false;
-                $page = false;
-                //check to see if this dir is permalink-level: i.e. the structure specifies an
-                //individual post. Do this by checking it contains at least one of 1) post name,
-                //2) post ID, 3) page name, 4) timestamp (year, month, day, hour, second and
-                //minute all present). Set these flags now as we need them for the endpoints.
-                if ( strpos($struct, '%postname%') !== false
-                        || strpos($struct, '%post_id%') !== false
-                        || strpos($struct, '%pagename%') !== false
-                        || (strpos($struct, '%year%') !== false && strpos($struct, '%monthnum%') !== false && strpos($struct, '%day%') !== false && strpos($struct, '%hour%') !== false && strpos($struct, '%minute%') !== false && strpos($struct, '%second%') !== false)
-                        ) {
-                    $post = true;
-                    if ( strpos($struct, '%pagename%') !== false )
-                        $page = true;
+                }
-                if ( ! $post ) {
-                    // For custom post types, we need to add on endpoints as well.
-                    foreach ( get_post_types( array('_builtin' => false ) ) as $ptype ) {
-                        if ( strpos($struct, "%$ptype%") !== false ) {
-                            $post = true;
-                            $page = is_post_type_hierarchical( $ptype ); // This is for page style attachment url's
-                            break;
+                        }
+                    }
+                }
-                //if we're creating rules for a permalink, do all the endpoints like attachments etc
-                if ( $post ) {
-                    //create query and regex for trackback
-                    $trackbackmatch = $match . $trackbackregex;
-                    $trackbackquery = $trackbackindex . '?' . $query . '&tb=1';
-                    //trim slashes from the end of the regex for this dir
-                    $match = rtrim($match, '/');
-                    //get rid of brackets
-                    $submatchbase = str_replace( array('(', ')'), '', $match);
-                    //add a rule for at attachments, which take the form of <permalink>/some-text
-                    $sub1 = $submatchbase . '/([^/]+)/';
-                    $sub1tb = $sub1 . $trackbackregex; //add trackback regex <permalink>/trackback/...
-                    $sub1feed = $sub1 . $feedregex; //and <permalink>/feed/(atom|...)
-                    $sub1feed2 = $sub1 . $feedregex2; //and <permalink>/(feed|atom...)
-                    $sub1comment = $sub1 . $commentregex; //and <permalink>/comment-page-xx
-                    //add another rule to match attachments in the explicit form:
-                    //<permalink>/attachment/some-text
-                    $sub2 = $submatchbase . '/attachment/([^/]+)/';
-                    $sub2tb = $sub2 . $trackbackregex; //and add trackbacks <permalink>/attachment/trackback
-                    $sub2feed = $sub2 . $feedregex;    //feeds, <permalink>/attachment/feed/(atom|...)
-                    $sub2feed2 = $sub2 . $feedregex2;  //and feeds again on to this <permalink>/attachment/(feed|atom...)
-                    $sub2comment = $sub2 . $commentregex; //and <permalink>/comment-page-xx
-                    //create queries for these extra tag-ons we've just dealt with
-                    $subquery = $index . '?attachment=' . $this->preg_index(1);
-                    $subtbquery = $subquery . '&tb=1';
-                    $subfeedquery = $subquery . '&feed=' . $this->preg_index(2);
-                    $subcommentquery = $subquery . '&cpage=' . $this->preg_index(2);
-                    //do endpoints for attachments
-                    if ( !empty($endpoints) ) {
-                        foreach ( (array) $ep_query_append as $regex => $ep ) {
-                            if ( $ep[0] & EP_ATTACHMENT ) {
-                                $rewrite[$sub1 . $regex] = $subquery . $ep[1] . $this->preg_index(3);
-                                $rewrite[$sub2 . $regex] = $subquery . $ep[1] . $this->preg_index(3);
+                            }
+                        }
+                    }
-                    //now we've finished with endpoints, finish off the $sub1 and $sub2 matches
-                    //add a ? as we don't have to match that last slash, and finally a $ so we
-                    //match to the end of the URL
-                    $sub1 .= '?$';
-                    $sub2 .= '?$';
-                    //post pagination, e.g. <permalink>/2/
-                    $match = $match . '(/[0-9]+)?/?$';
-                    $query = $index . '?' . $query . '&page=' . $this->preg_index($num_toks + 1);
-                } else { //not matching a permalink so this is a lot simpler
-                    //close the match and finalise the query
-                    $match .= '?$';
-                    $query = $index . '?' . $query;
+                }
-                //create the final array for this dir by joining the $rewrite array (which currently
-                //only contains rules/queries for trackback, pages etc) to the main regex/query for
-                //this dir
-                $rewrite = array_merge($rewrite, array($match => $query));
-                //if we're matching a permalink, add those extras (attachments etc) on
-                if ( $post ) {
-                    //add trackback
-                    $rewrite = array_merge(array($trackbackmatch => $trackbackquery), $rewrite);
-                    //add regexes/queries for attachments, attachment trackbacks and so on
-                    if ( ! $page ) //require <permalink>/attachment/stuff form for pages because of confusion with subpages
-                        $rewrite = array_merge($rewrite, array($sub1 => $subquery, $sub1tb => $subtbquery, $sub1feed => $subfeedquery, $sub1feed2 => $subfeedquery, $sub1comment => $subcommentquery));
-                    $rewrite = array_merge(array($sub2 => $subquery, $sub2tb => $subtbquery, $sub2feed => $subfeedquery, $sub2feed2 => $subfeedquery, $sub2comment => $subcommentquery), $rewrite);
+                }
-            } //if($num_toks)
-            //add the rules for this dir to the accumulating $post_rewrite
-            $post_rewrite = array_merge($rewrite, $post_rewrite);
-        } //foreach ($dir)
-        return $post_rewrite; //the finished rules. phew!
+    }
-    /**
-     * Generate Rewrite rules with permalink structure and walking directory only.
+     *
-     * Shorten version of {@link WP_Rewrite::generate_rewrite_rules()} that
-     * allows for shorter list of parameters. See the method for longer
-     * description of what generating rewrite rules does.
+     *
-     * @uses WP_Rewrite::generate_rewrite_rules() See for long description and rest of parameters.
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $permalink_structure The permalink structure to generate rules.
-     * @param bool   $walk_dirs           Optional, default is false. Whether to create list of directories to walk over.
-     * @return array
-     */
-    public function generate_rewrite_rule($permalink_structure, $walk_dirs = false) {
-        return $this->generate_rewrite_rules($permalink_structure, EP_NONE, false, false, false, $walk_dirs);
+    }
-    /**
-     * Construct rewrite matches and queries from permalink structure.
+     *
-     * Runs the action 'generate_rewrite_rules' with the parameter that is an
-     * reference to the current WP_Rewrite instance to further manipulate the
-     * permalink structures and rewrite rules. Runs the 'rewrite_rules_array'
-     * filter on the full rewrite rule array.
+     *
-     * There are two ways to manipulate the rewrite rules, one by hooking into
-     * the 'generate_rewrite_rules' action and gaining full control of the
-     * object or just manipulating the rewrite rule array before it is passed
-     * from the function.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return array An associate array of matches and queries.
-     */
-    public function rewrite_rules() {
-        $rewrite = array();
-        if ( empty($this->permalink_structure) )
-            return $rewrite;
-        // robots.txt -only if installed at the root
-        $home_path = parse_url( home_url() );
-        $robots_rewrite = ( empty( $home_path['path'] ) || '/' == $home_path['path'] ) ? array( 'robots\.txt$' => $this->index . '?robots=1' ) : array();
-        // Old feed and service files
-        $deprecated_files = array(
-            '.*wp-(atom|rdf|rss|rss2|feed|commentsrss2)\.php$' => $this->index . '?feed=old',
-            '.*wp-app\.php(/.*)?$' => $this->index . '?error=403',
-        );
-        // Registration rules
-        $registration_pages = array();
-        if ( is_multisite() && is_main_site() ) {
-            $registration_pages['.*wp-signup.php$'] = $this->index . '?signup=true';
-            $registration_pages['.*wp-activate.php$'] = $this->index . '?activate=true';
+        }
-        $registration_pages['.*wp-register.php$'] = $this->index . '?register=true'; // Deprecated
-        // Post rewrite rules.
-        $post_rewrite = $this->generate_rewrite_rules( $this->permalink_structure, EP_PERMALINK );
-        /**
-         * Filter rewrite rules used for "post" archives.
+         *
-         * @since 1.5.0
+         *
-         * @param array $post_rewrite The rewrite rules for posts.
-         */
-        $post_rewrite = apply_filters( 'post_rewrite_rules', $post_rewrite );
-        // Date rewrite rules.
-        $date_rewrite = $this->generate_rewrite_rules($this->get_date_permastruct(), EP_DATE);
-        /**
-         * Filter rewrite rules used for date archives.
+         *
-         * Likely date archives would include /yyyy/, /yyyy/mm/, and /yyyy/mm/dd/.
+         *
-         * @since 1.5.0
+         *
-         * @param array $date_rewrite The rewrite rules for date archives.
-         */
-        $date_rewrite = apply_filters( 'date_rewrite_rules', $date_rewrite );
-        // Root-level rewrite rules.
-        $root_rewrite = $this->generate_rewrite_rules($this->root . '/', EP_ROOT);
-        /**
-         * Filter rewrite rules used for root-level archives.
+         *
-         * Likely root-level archives would include pagination rules for the homepage
-         * as well as site-wide post feeds (e.g. /feed/, and /feed/atom/).
+         *
-         * @since 1.5.0
+         *
-         * @param array $root_rewrite The root-level rewrite rules.
-         */
-        $root_rewrite = apply_filters( 'root_rewrite_rules', $root_rewrite );
-        // Comments rewrite rules.
-        $comments_rewrite = $this->generate_rewrite_rules($this->root . $this->comments_base, EP_COMMENTS, false, true, true, false);
-        /**
-         * Filter rewrite rules used for comment feed archives.
+         *
-         * Likely comments feed archives include /comments/feed/, and /comments/feed/atom/.
+         *
-         * @since 1.5.0
+         *
-         * @param array $comments_rewrite The rewrite rules for the site-wide comments feeds.
-         */
-        $comments_rewrite = apply_filters( 'comments_rewrite_rules', $comments_rewrite );
-        // Search rewrite rules.
-        $search_structure = $this->get_search_permastruct();
-        $search_rewrite = $this->generate_rewrite_rules($search_structure, EP_SEARCH);
-        /**
-         * Filter rewrite rules used for search archives.
+         *
-         * Likely search-related archives include /search/search+query/ as well as
-         * pagination and feed paths for a search.
+         *
-         * @since 1.5.0
+         *
-         * @param array $search_rewrite The rewrite rules for search queries.
-         */
-        $search_rewrite = apply_filters( 'search_rewrite_rules', $search_rewrite );
-        // Author rewrite rules.
-        $author_rewrite = $this->generate_rewrite_rules($this->get_author_permastruct(), EP_AUTHORS);
-        /**
-         * Filter rewrite rules used for author archives.
+         *
-         * Likely author archives would include /author/author-name/, as well as
-         * pagination and feed paths for author archives.
+         *
-         * @since 1.5.0
+         *
-         * @param array $author_rewrite The rewrite rules for author archives.
-         */
-        $author_rewrite = apply_filters( 'author_rewrite_rules', $author_rewrite );
-        // Pages rewrite rules.
-        $page_rewrite = $this->page_rewrite_rules();
-        /**
-         * Filter rewrite rules used for "page" post type archives.
+         *
-         * @since 1.5.0
+         *
-         * @param array $page_rewrite The rewrite rules for the "page" post type.
-         */
-        $page_rewrite = apply_filters( 'page_rewrite_rules', $page_rewrite );
-        // Extra permastructs.
-        foreach ( $this->extra_permastructs as $permastructname => $struct ) {
-            if ( is_array( $struct ) ) {
-                if ( count( $struct ) == 2 )
-                    $rules = $this->generate_rewrite_rules( $struct[0], $struct[1] );
-                else
-                    $rules = $this->generate_rewrite_rules( $struct['struct'], $struct['ep_mask'], $struct['paged'], $struct['feed'], $struct['forcomments'], $struct['walk_dirs'], $struct['endpoints'] );
-            } else {
-                $rules = $this->generate_rewrite_rules( $struct );
+            }
-            /**
-             * Filter rewrite rules used for individual permastructs.
+             *
-             * The dynamic portion of the hook name, `$permastructname`, refers
-             * to the name of the registered permastruct, e.g. 'post_tag' (tags),
-             * 'category' (categories), etc.
+             *
-             * @since 3.1.0
+             *
-             * @param array $rules The rewrite rules generated for the current permastruct.
-             */
-            $rules = apply_filters( $permastructname . '_rewrite_rules', $rules );
-            if ( 'post_tag' == $permastructname ) {
-                /**
-                 * Filter rewrite rules used specifically for Tags.
+                 *
-                 * @since 2.3.0
-                 * @deprecated 3.1.0 Use 'post_tag_rewrite_rules' instead
+                 *
-                 * @param array $rules The rewrite rules generated for tags.
-                 */
-                $rules = apply_filters( 'tag_rewrite_rules', $rules );
+            }
-            $this->extra_rules_top = array_merge($this->extra_rules_top, $rules);
+        }
-        // Put them together.
-        if ( $this->use_verbose_page_rules )
-            $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite,  $author_rewrite, $date_rewrite, $page_rewrite, $post_rewrite, $this->extra_rules);
-        else
-            $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite,  $author_rewrite, $date_rewrite, $post_rewrite, $page_rewrite, $this->extra_rules);
-        /**
-         * Fires after the rewrite rules are generated.
+         *
-         * @since 1.5.0
+         *
-         * @param WP_Rewrite $this Current WP_Rewrite instance, passed by reference.
-         */
-        do_action_ref_array( 'generate_rewrite_rules', array( &$this ) );
-        /**
-         * Filter the full set of generated rewrite rules.
+         *
-         * @since 1.5.0
+         *
-         * @param array $this->rules The compiled array of rewrite rules.
-         */
-        $this->rules = apply_filters( 'rewrite_rules_array', $this->rules );
-        return $this->rules;
+    }
-    /**
-     * Retrieve the rewrite rules.
+     *
-     * The difference between this method and {@link
-     * WP_Rewrite::rewrite_rules()} is that this method stores the rewrite rules
-     * in the 'rewrite_rules' option and retrieves it. This prevents having to
-     * process all of the permalinks to get the rewrite rules in the form of
-     * caching.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return array Rewrite rules.
-     */
-    public function wp_rewrite_rules() {
-        $this->rules = get_option('rewrite_rules');
-        if ( empty($this->rules) ) {
-            $this->matches = 'matches';
-            $this->rewrite_rules();
-            update_option('rewrite_rules', $this->rules);
+        }
-        return $this->rules;
+    }
-    /**
-     * Retrieve mod_rewrite formatted rewrite rules to write to .htaccess.
+     *
-     * Does not actually write to the .htaccess file, but creates the rules for
-     * the process that will.
+     *
-     * Will add the non_wp_rules property rules to the .htaccess file before
-     * the WordPress rewrite rules one.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @return string
-     */
-    public function mod_rewrite_rules() {
-        if ( ! $this->using_permalinks() )
-            return '';
-        $site_root = parse_url( site_url() );
-        if ( isset( $site_root['path'] ) )
-            $site_root = trailingslashit($site_root['path']);
-        $home_root = parse_url(home_url());
-        if ( isset( $home_root['path'] ) )
-            $home_root = trailingslashit($home_root['path']);
-        else
-            $home_root = '/';
-        $rules = "<IfModule mod_rewrite.c>\n";
-        $rules .= "RewriteEngine On\n";
-        $rules .= "RewriteBase $home_root\n";
-        $rules .= "RewriteRule ^index\.php$ - [L]\n"; // Prevent -f checks on index.php.
-        //add in the rules that don't redirect to WP's index.php (and thus shouldn't be handled by WP at all)
-        foreach ( (array) $this->non_wp_rules as $match => $query) {
-            // Apache 1.3 does not support the reluctant (non-greedy) modifier.
-            $match = str_replace('.+?', '.+', $match);
-            // If the match is unanchored and greedy, prepend rewrite conditions
-            // to avoid infinite redirects and eclipsing of real files.
-            //if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
-                //nada.
-            //}
-            $rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
+        }
-        if ( $this->use_verbose_rules ) {
-            $this->matches = '';
-            $rewrite = $this->rewrite_rules();
-            $num_rules = count($rewrite);
-            $rules .= "RewriteCond %{REQUEST_FILENAME} -f [OR]\n" .
-                "RewriteCond %{REQUEST_FILENAME} -d\n" .
-                "RewriteRule ^.*$ - [S=$num_rules]\n";
-            foreach ( (array) $rewrite as $match => $query) {
-                // Apache 1.3 does not support the reluctant (non-greedy) modifier.
-                $match = str_replace('.+?', '.+', $match);
-                // If the match is unanchored and greedy, prepend rewrite conditions
-                // to avoid infinite redirects and eclipsing of real files.
-                //if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
-                    //nada.
-                //}
-                if ( strpos($query, $this->index) !== false )
-                    $rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
-                else
-                    $rules .= 'RewriteRule ^' . $match . ' ' . $site_root . $query . " [QSA,L]\n";
+            }
-        } else {
-            $rules .= "RewriteCond %{REQUEST_FILENAME} !-f\n" .
-                "RewriteCond %{REQUEST_FILENAME} !-d\n" .
-                "RewriteRule . {$home_root}{$this->index} [L]\n";
+        }
-        $rules .= "</IfModule>\n";
-        /**
+         *
-         * Filter the list of rewrite rules formatted for output to an .htaccess file.
+         *
-         * @since 1.5.0
+         *
-         * @param string $rules mod_rewrite Rewrite rules formatted for .htaccess.
-         */
-        $rules = apply_filters( 'mod_rewrite_rules', $rules );
-        /**
-         * Filter the list of rewrite rules formatted for output to an .htaccess file.
+         *
-         * @since 1.5.0
-         * @deprecated 1.5.0 Use the mod_rewrite_rules filter instead.
+         *
-         * @param string $rules mod_rewrite Rewrite rules formatted for .htaccess.
-         */
-        return apply_filters( 'rewrite_rules', $rules );
+    }
-    /**
-     * Retrieve IIS7 URL Rewrite formatted rewrite rules to write to web.config file.
+     *
-     * Does not actually write to the web.config file, but creates the rules for
-     * the process that will.
+     *
-     * @since 2.8.0
-     * @access public
+     *
-     * @return string
-     */
-    public function iis7_url_rewrite_rules( $add_parent_tags = false ) {
-        if ( ! $this->using_permalinks() )
-            return '';
-        $rules = '';
-        if ( $add_parent_tags ) {
-            $rules .= '<configuration>
-    <system.webServer>
-        <rewrite>
-            <rules>';
+        }
-        $rules .= '
-            <rule name="wordpress" patternSyntax="Wildcard">
-                <match url="*" />
-                    <conditions>
-                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
-                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
-                    </conditions>
-                <action type="Rewrite" url="index.php" />
-            </rule>';
-        if ( $add_parent_tags ) {
-            $rules .= '
-            </rules>
-        </rewrite>
-    </system.webServer>
-</configuration>';
+        }
-        /**
-         * Filter the list of rewrite rules formatted for output to a web.config.
+         *
-         * @since 2.8.0
+         *
-         * @param string $rules Rewrite rules formatted for IIS web.config.
-         */
-        return apply_filters( 'iis7_url_rewrite_rules', $rules );
+    }
-    /**
-     * Add a straight rewrite rule.
+     *
-     * Any value in the $after parameter that isn't 'bottom' will be placed at
-     * the top of the rules.
+     *
-     * @since 2.1.0
-     * @access public
+     *
-     * @param string $regex    Regular expression to match against request.
-     * @param string $redirect URL regex redirects to when regex matches request.
-     * @param string $after    Optional, default is bottom. Location to place rule.
-     */
-    public function add_rule($regex, $redirect, $after = 'bottom') {
-        //get everything up to the first ?
-        $index = (strpos($redirect, '?') === false ? strlen($redirect) : strpos($redirect, '?'));
-        $front = substr($redirect, 0, $index);
-        if ( $front != $this->index ) { //it doesn't redirect to WP's index.php
-            $this->add_external_rule($regex, $redirect);
-        } else {
-            if ( 'bottom' == $after)
-                $this->extra_rules = array_merge($this->extra_rules, array($regex => $redirect));
-            else
-                $this->extra_rules_top = array_merge($this->extra_rules_top, array($regex => $redirect));
-            //$this->extra_rules[$regex] = $redirect;
+        }
+    }
-    /**
-     * Add a rule that doesn't redirect to index.php.
+     *
-     * Can redirect to any place.
+     *
-     * @since 2.1.0
-     * @access public
+     *
-     * @param string $regex    Regular expression to match against request.
-     * @param string $redirect URL regex redirects to when regex matches request.
-     */
-    public function add_external_rule($regex, $redirect) {
-        $this->non_wp_rules[$regex] = $redirect;
+    }
-    /**
-     * Add an endpoint, like /trackback/.
+     *
-     * @since 2.1.0
-     * @since 3.9.0 $query_var parameter added.
-     * @since 4.3.0 Added support for skipping query var registration by passing `false` to `$query_var`.
-     * @access public
+     *
-     * @see add_rewrite_endpoint() for full documentation.
+     *
-     * @global WP $wp
+     *
-     * @param string      $name      Name of the endpoint.
-     * @param int         $places    Endpoint mask describing the places the endpoint should be added.
-     * @param string|bool $query_var Optional. Name of the corresponding query variable. Pass `false` to
-     *                               skip registering a query_var for this endpoint. Defaults to the
-     *                               value of `$name`.
-     */
-    public function add_endpoint( $name, $places, $query_var = true ) {
-        global $wp;
-        // For backward compatibility, if `null` has explicitly been passed as `$query_var`, assume `true`.
-        if ( true === $query_var || null === func_get_arg( 2 ) ) {
-            $query_var = $name;
+        }
-        $this->endpoints[] = array( $places, $name, $query_var );
-        if ( $query_var ) {
-            $wp->add_query_var( $query_var );
+        }
+    }
-    /**
-     * Add a new permalink structure.
+     *
-     * A permalink structure (permastruct) is an abstract definition of a set of rewrite rules; it
-     * is an easy way of expressing a set of regular expressions that rewrite to a set of query strings.
-     * The new permastruct is added to the {@link WP_Rewrite::$extra_permastructs} array. When the
-     * rewrite rules are built by {@link WP_Rewrite::rewrite_rules()} all of these extra permastructs
-     * are passed to {@link WP_Rewrite::generate_rewrite_rules()} which transforms them into the
-     * regular expressions that many love to hate.
+     *
-     * The $args parameter gives you control over how {@link WP_Rewrite::generate_rewrite_rules()}
-     * works on the new permastruct.
+     *
-     * @since 2.5.0
-     * @access public
+     *
-     * @param string $name   Name for permalink structure.
-     * @param string $struct Permalink structure (e.g. category/%category%)
-     * @param array  $args   Optional configuration for building the rules from the permalink structure:
-     *     - with_front (bool) - Should the structure be prepended with WP_Rewrite::$front? Default is true.
-     *     - ep_mask (int) - Endpoint mask defining what endpoints are added to the structure. Default is EP_NONE.
-     *     - paged (bool) - Should archive pagination rules be added for the structure? Default is true.
-     *     - feed (bool) - Should feed rewrite rules be added for the structure? Default is true.
-     *     - forcomments (bool) - Should the feed rules be a query for a comments feed? Default is false.
-     *     - walk_dirs (bool) - Should the 'directories' making up the structure be walked over and rewrite
-     *                          rules built for each in turn? Default is true.
-     *     - endpoints (bool) - Should endpoints be applied to the generated rewrite rules? Default is true.
-     */
-    public function add_permastruct( $name, $struct, $args = array() ) {
-        // backwards compatibility for the old parameters: $with_front and $ep_mask
-        if ( ! is_array( $args ) )
-            $args = array( 'with_front' => $args );
-        if ( func_num_args() == 4 )
-            $args['ep_mask'] = func_get_arg( 3 );
-        $defaults = array(
-            'with_front' => true,
-            'ep_mask' => EP_NONE,
-            'paged' => true,
-            'feed' => true,
-            'forcomments' => false,
-            'walk_dirs' => true,
-            'endpoints' => true,
-        );
-        $args = array_intersect_key( $args, $defaults );
-        $args = wp_parse_args( $args, $defaults );
-        if ( $args['with_front'] )
-            $struct = $this->front . $struct;
-        else
-            $struct = $this->root . $struct;
-        $args['struct'] = $struct;
-        $this->extra_permastructs[ $name ] = $args;
+    }
-    /**
-     * Remove rewrite rules and then recreate rewrite rules.
+     *
-     * Calls {@link WP_Rewrite::wp_rewrite_rules()} after removing the
-     * 'rewrite_rules' option. If the function named 'save_mod_rewrite_rules'
-     * exists, it will be called.
+     *
-     * @since 2.0.1
-     * @access public
+     *
-     * @staticvar bool $do_hard_later
+     *
-     * @param bool $hard Whether to update .htaccess (hard flush) or just update rewrite_rules option (soft flush). Default is true (hard).
-     */
-    public function flush_rules( $hard = true ) {
-        static $do_hard_later = null;
-        // Prevent this action from running before everyone has registered their rewrites
-        if ( ! did_action( 'wp_loaded' ) ) {
-            add_action( 'wp_loaded', array( $this, 'flush_rules' ) );
-            $do_hard_later = ( isset( $do_hard_later ) ) ? $do_hard_later || $hard : $hard;
-            return;
+        }
-        if ( isset( $do_hard_later ) ) {
-            $hard = $do_hard_later;
-            unset( $do_hard_later );
+        }
-        delete_option('rewrite_rules');
-        $this->wp_rewrite_rules();
-        /**
-         * Filter whether a "hard" rewrite rule flush should be performed when requested.
+         *
-         * A "hard" flush updates .htaccess (Apache) or web.config (IIS).
+         *
-         * @since 3.7.0
+         *
-         * @param bool $hard Whether to flush rewrite rules "hard". Default true.
-         */
-        if ( ! $hard || ! apply_filters( 'flush_rewrite_rules_hard', true ) ) {
-            return;
+        }
-        if ( function_exists( 'save_mod_rewrite_rules' ) )
-            save_mod_rewrite_rules();
-        if ( function_exists( 'iis7_save_url_rewrite_rules' ) )
-            iis7_save_url_rewrite_rules();
+    }
-    /**
-     * Sets up the object's properties.
+     *
-     * The 'use_verbose_page_rules' object property will be set to true if the
-     * permalink structure begins with one of the following: '%postname%', '%category%',
-     * '%tag%', or '%author%'.
+     *
-     * @since 1.5.0
-     * @access public
-     */
-    public function init() {
-        $this->extra_rules = $this->non_wp_rules = $this->endpoints = array();
-        $this->permalink_structure = get_option('permalink_structure');
-        $this->front = substr($this->permalink_structure, 0, strpos($this->permalink_structure, '%'));
-        $this->root = '';
-        if ( $this->using_index_permalinks() )
-            $this->root = $this->index . '/';
-        unset($this->author_structure);
-        unset($this->date_structure);
-        unset($this->page_structure);
-        unset($this->search_structure);
-        unset($this->feed_structure);
-        unset($this->comment_feed_structure);
-        $this->use_trailing_slashes = ( '/' == substr($this->permalink_structure, -1, 1) );
-        // Enable generic rules for pages if permalink structure doesn't begin with a wildcard.
-        if ( preg_match("/^[^%]*%(?:postname|category|tag|author)%/", $this->permalink_structure) )
-             $this->use_verbose_page_rules = true;
-        else
-            $this->use_verbose_page_rules = false;
+    }
-    /**
-     * Set the main permalink structure for the blog.
+     *
-     * Will update the 'permalink_structure' option, if there is a difference
-     * between the current permalink structure and the parameter value. Calls
-     * {@link WP_Rewrite::init()} after the option is updated.
+     *
-     * Fires the 'permalink_structure_changed' action once the init call has
-     * processed passing the old and new values
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $permalink_structure Permalink structure.
-     */
-    public function set_permalink_structure($permalink_structure) {
-        if ( $permalink_structure != $this->permalink_structure ) {
-            $old_permalink_structure = $this->permalink_structure;
-            update_option('permalink_structure', $permalink_structure);
-            $this->init();
-            /**
-             * Fires after the permalink structure is updated.
+             *
-             * @since 2.8.0
+             *
-             * @param string $old_permalink_structure The previous permalink structure.
-             * @param string $permalink_structure     The new permalink structure.
-             */
-            do_action( 'permalink_structure_changed', $old_permalink_structure, $permalink_structure );
+        }
+    }
-    /**
-     * Set the category base for the category permalink.
+     *
-     * Will update the 'category_base' option, if there is a difference between
-     * the current category base and the parameter value. Calls
-     * {@link WP_Rewrite::init()} after the option is updated.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     * @param string $category_base Category permalink structure base.
-     */
-    public function set_category_base($category_base) {
-        if ( $category_base != get_option('category_base') ) {
-            update_option('category_base', $category_base);
-            $this->init();
+        }
+    }
-    /**
-     * Set the tag base for the tag permalink.
+     *
-     * Will update the 'tag_base' option, if there is a difference between the
-     * current tag base and the parameter value. Calls
-     * {@link WP_Rewrite::init()} after the option is updated.
+     *
-     * @since 2.3.0
-     * @access public
+     *
-     * @param string $tag_base Tag permalink structure base.
-     */
-    public function set_tag_base( $tag_base ) {
-        if ( $tag_base != get_option( 'tag_base') ) {
-            update_option( 'tag_base', $tag_base );
-            $this->init();
+        }
+    }
-    /**
-     * Constructor - Calls init(), which runs setup.
+     *
-     * @since 1.5.0
-     * @access public
+     *
-     */
-    public function __construct() {
-        $this->init();
+    }
+}

trunk/src/wp-includes/rewrite.php

-                      r33237
+                      r33751
  */
+/**
+ * Add a straight rewrite rule.
+ *
+ * @since 2.1.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param string $regex    Regular Expression to match request against.
+ * @param string $redirect Page to redirect to.
+ * @param string $after    Optional, default is 'bottom'. Where to add rule, can also be 'top'.
+ */
+function add_rewrite_rule($regex, $redirect, $after = 'bottom') {
+    global $wp_rewrite;
+    $wp_rewrite->add_rule($regex, $redirect, $after);
+}
+/**
+ * Add a new rewrite tag (like %postname%).
+ *
+ * The $query parameter is optional. If it is omitted you must ensure that
+ * you call this on, or before, the 'init' hook. This is because $query defaults
+ * to "$tag=", and for this to work a new query var has to be added.
+ *
+ * @since 2.1.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ * @global WP         $wp
+ *
+ * @param string $tag   Name of the new rewrite tag.
+ * @param string $regex Regular expression to substitute the tag for in rewrite rules.
+ * @param string $query String to append to the rewritten query. Must end in '='. Optional.
+ */
+function add_rewrite_tag( $tag, $regex, $query = '' ) {
+    // validate the tag's name
+    if ( strlen( $tag ) < 3 || $tag[0] != '%' || $tag[ strlen($tag) - 1 ] != '%' )
+        return;
+    global $wp_rewrite, $wp;
+    if ( empty( $query ) ) {
+        $qv = trim( $tag, '%' );
+        $wp->add_query_var( $qv );
+        $query = $qv . '=';
+    }
+    $wp_rewrite->add_rewrite_tag( $tag, $regex, $query );
+}
+/**
+ * Add permalink structure.
+ *
+ * @since 3.0.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param string $name   Name for permalink structure.
+ * @param string $struct Permalink structure.
+ * @param array  $args   Optional configuration for building the rules from the permalink structure,
+ *                       see {@link WP_Rewrite::add_permastruct()} for full details.
+ */
+function add_permastruct( $name, $struct, $args = array() ) {
+    global $wp_rewrite;
+    // backwards compatibility for the old parameters: $with_front and $ep_mask
+    if ( ! is_array( $args ) )
+        $args = array( 'with_front' => $args );
+    if ( func_num_args() == 4 )
+        $args['ep_mask'] = func_get_arg( 3 );
+    $wp_rewrite->add_permastruct( $name, $struct, $args );
+}
+/**
+ * Add a new feed type like /atom1/.
+ *
+ * @since 2.1.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param string   $feedname
+ * @param callback $function Callback to run on feed display.
+ * @return string Feed action name.
+ */
+function add_feed($feedname, $function) {
+    global $wp_rewrite;
+    if ( ! in_array($feedname, $wp_rewrite->feeds) ) //override the file if it is
+        $wp_rewrite->feeds[] = $feedname;
+    $hook = 'do_feed_' . $feedname;
+    // Remove default function hook
+    remove_action($hook, $hook);
+    add_action($hook, $function, 10, 1);
+    return $hook;
+}
+/**
+ * Remove rewrite rules and then recreate rewrite rules.
+ *
+ * @since 3.0.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param bool $hard Whether to update .htaccess (hard flush) or just update
+ *                   rewrite_rules transient (soft flush). Default is true (hard).
+ */
+function flush_rewrite_rules( $hard = true ) {
+    global $wp_rewrite;
+    $wp_rewrite->flush_rules( $hard );
+}
+/**
+ * Endpoint Mask for default, which is nothing.
+ *
+ * @since 2.1.0
+ */
+define('EP_NONE', 0);
+/**
+ * Endpoint Mask for Permalink.
+ *
+ * @since 2.1.0
+ */
+define('EP_PERMALINK', 1);
+/**
+ * Endpoint Mask for Attachment.
+ *
+ * @since 2.1.0
+ */
+define('EP_ATTACHMENT', 2);
+/**
+ * Endpoint Mask for date.
+ *
+ * @since 2.1.0
+ */
+define('EP_DATE', 4);
+/**
+ * Endpoint Mask for year
+ *
+ * @since 2.1.0
+ */
+define('EP_YEAR', 8);
+/**
+ * Endpoint Mask for month.
+ *
+ * @since 2.1.0
+ */
+define('EP_MONTH', 16);
+/**
+ * Endpoint Mask for day.
+ *
+ * @since 2.1.0
+ */
+define('EP_DAY', 32);
+/**
+ * Endpoint Mask for root.
+ *
+ * @since 2.1.0
+ */
+define('EP_ROOT', 64);
+/**
+ * Endpoint Mask for comments.
+ *
+ * @since 2.1.0
+ */
+define('EP_COMMENTS', 128);
+/**
+ * Endpoint Mask for searches.
+ *
+ * @since 2.1.0
+ */
+define('EP_SEARCH', 256);
+/**
+ * Endpoint Mask for categories.
+ *
+ * @since 2.1.0
+ */
+define('EP_CATEGORIES', 512);
+/**
+ * Endpoint Mask for tags.
+ *
+ * @since 2.3.0
+ */
+define('EP_TAGS', 1024);
+/**
+ * Endpoint Mask for authors.
+ *
+ * @since 2.1.0
+ */
+define('EP_AUTHORS', 2048);
+/**
+ * Endpoint Mask for pages.
+ *
+ * @since 2.1.0
+ */
+define('EP_PAGES', 4096);
+/**
+ * Endpoint Mask for all archive views.
+ *
+ * @since 3.7.0
+ */
+define( 'EP_ALL_ARCHIVES', EP_DATE | EP_YEAR | EP_MONTH | EP_DAY | EP_CATEGORIES | EP_TAGS | EP_AUTHORS );
+/**
+ * Endpoint Mask for everything.
+ *
+ * @since 2.1.0
+ */
+define( 'EP_ALL', EP_PERMALINK | EP_ATTACHMENT | EP_ROOT | EP_COMMENTS | EP_SEARCH | EP_PAGES | EP_ALL_ARCHIVES );
+/**
+ * Add an endpoint, like /trackback/.
+ *
+ * Adding an endpoint creates extra rewrite rules for each of the matching
+ * places specified by the provided bitmask. For example:
+ *
+ *     add_rewrite_endpoint( 'json', EP_PERMALINK | EP_PAGES );
+ *
+ * will add a new rewrite rule ending with "json(/(.*))?/?$" for every permastruct
+ * that describes a permalink (post) or page. This is rewritten to "json=$match"
+ * where $match is the part of the URL matched by the endpoint regex (e.g. "foo" in
+ * "[permalink]/json/foo/").
+ *
+ * A new query var with the same name as the endpoint will also be created.
+ *
+ * When specifying $places ensure that you are using the EP_* constants (or a
+ * combination of them using the bitwise OR operator) as their values are not
+ * guaranteed to remain static (especially `EP_ALL`).
+ *
+ * Be sure to flush the rewrite rules - see flush_rewrite_rules() - when your plugin gets
+ * activated and deactivated.
+ *
+ * @since 2.1.0
+ * @since 4.3.0 Added support for skipping query var registration by passing `false` to `$query_var`.
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param string      $name      Name of the endpoint.
+ * @param int         $places    Endpoint mask describing the places the endpoint should be added.
+ * @param string|bool $query_var Name of the corresponding query variable. Pass `false` to skip registering a query_var
+ *                               for this endpoint. Defaults to the value of `$name`.
+ */
+function add_rewrite_endpoint( $name, $places, $query_var = true ) {
+    global $wp_rewrite;
+    $wp_rewrite->add_endpoint( $name, $places, $query_var );
+}
+/**
+ * Filter the URL base for taxonomies.
+ *
+ * To remove any manually prepended /index.php/.
+ *
+ * @access private
+ * @since 2.6.0
+ *
+ * @param string $base The taxonomy base that we're going to filter
+ * @return string
+ */
+function _wp_filter_taxonomy_base( $base ) {
+    if ( !empty( $base ) ) {
+        $base = preg_replace( '|^/index\.php/|', '', $base );
+        $base = trim( $base, '/' );
+    }
+    return $base;
+}
+/**
+ * Resolve numeric slugs that collide with date permalinks.
+ *
+ * Permalinks of posts with numeric slugs can sometimes look to WP_Query::parse_query()
+ * like a date archive, as when your permalink structure is `/%year%/%postname%/` and
+ * a post with post_name '05' has the URL `/2015/05/`.
+ *
+ * This function detects conflicts of this type and resolves them in favor of the
+ * post permalink.
+ *
+ * Note that, since 4.3.0, wp_unique_post_slug() prevents the creation of post slugs
+ * that would result in a date archive conflict. The resolution performed in this
+ * function is primarily for legacy content, as well as cases when the admin has changed
+ * the site's permalink structure in a way that introduces URL conflicts.
+ *
+ * @since 4.3.0
+ *
+ * @param array $query_vars Optional. Query variables for setting up the loop, as determined in
+ *                          WP::parse_request(). Default empty array.
+ * @return array Returns the original array of query vars, with date/post conflicts resolved.
+ */
+function wp_resolve_numeric_slug_conflicts( $query_vars = array() ) {
+    if ( ! isset( $query_vars['year'] ) && ! isset( $query_vars['monthnum'] ) && ! isset( $query_vars['day'] ) ) {
+        return $query_vars;
+    }
+    // Identify the 'postname' position in the permastruct array.
+    $permastructs   = array_values( array_filter( explode( '/', get_option( 'permalink_structure' ) ) ) );
+    $postname_index = array_search( '%postname%', $permastructs );
+    if ( false === $postname_index ) {
+        return $query_vars;
+    }
+    /*
+     * A numeric slug could be confused with a year, month, or day, depending on position. To account for
+     * the possibility of post pagination (eg 2015/2 for the second page of a post called '2015'), our
+     * `is_*` checks are generous: check for year-slug clashes when `is_year` *or* `is_month`, and check
+     * for month-slug clashes when `is_month` *or* `is_day`.
+     */
+    $compare = '';
+    if ( 0 === $postname_index && ( isset( $query_vars['year'] ) || isset( $query_vars['monthnum'] ) ) ) {
+        $compare = 'year';
+    } elseif ( '%year%' === $permastructs[ $postname_index - 1 ] && ( isset( $query_vars['monthnum'] ) || isset( $query_vars['day'] ) ) ) {
+        $compare = 'monthnum';
+    } elseif ( '%monthnum%' === $permastructs[ $postname_index - 1 ] && isset( $query_vars['day'] ) ) {
+        $compare = 'day';
+    }
+    if ( ! $compare ) {
+        return $query_vars;
+    }
+    // This is the potentially clashing slug.
+    $value = $query_vars[ $compare ];
+    $post = get_page_by_path( $value, OBJECT, 'post' );
+    if ( ! ( $post instanceof WP_Post ) ) {
+        return $query_vars;
+    }
+    // If the date of the post doesn't match the date specified in the URL, resolve to the date archive.
+    if ( preg_match( '/^([0-9]{4})\-([0-9]{2})/', $post->post_date, $matches ) && isset( $query_vars['year'] ) && ( 'monthnum' === $compare || 'day' === $compare ) ) {
+        // $matches[1] is the year the post was published.
+        if ( intval( $query_vars['year'] ) !== intval( $matches[1] ) ) {
+            return $query_vars;
+        }
+        // $matches[2] is the month the post was published.
+        if ( 'day' === $compare && isset( $query_vars['monthnum'] ) && intval( $query_vars['monthnum'] ) !== intval( $matches[2] ) ) {
+            return $query_vars;
+        }
+    }
+    /*
+     * If the located post contains nextpage pagination, then the URL chunk following postname may be
+     * intended as the page number. Verify that it's a valid page before resolving to it.
+     */
+    $maybe_page = '';
+    if ( 'year' === $compare && isset( $query_vars['monthnum'] ) ) {
+        $maybe_page = $query_vars['monthnum'];
+    } elseif ( 'monthnum' === $compare && isset( $query_vars['day'] ) ) {
+        $maybe_page = $query_vars['day'];
+    }
+    $post_page_count = substr_count( $post->post_content, '<!--nextpage-->' ) + 1;
+    // If the post doesn't have multiple pages, but a 'page' candidate is found, resolve to the date archive.
+    if ( 1 === $post_page_count && $maybe_page ) {
+        return $query_vars;
+    }
+    // If the post has multiple pages and the 'page' number isn't valid, resolve to the date archive.
+    if ( $post_page_count > 1 && $maybe_page > $post_page_count ) {
+        return $query_vars;
+    }
+    // If we've gotten to this point, we have a slug/date clash. First, adjust for nextpage.
+    if ( '' !== $maybe_page ) {
+        $query_vars['page'] = intval( $maybe_page );
+    }
+    // Next, unset autodetected date-related query vars.
+    unset( $query_vars['year'] );
+    unset( $query_vars['monthnum'] );
+    unset( $query_vars['day'] );
+    // Then, set the identified post.
+    $query_vars['name'] = $post->post_name;
+    // Finally, return the modified query vars.
+    return $query_vars;
+}
+/**
+ * Examine a url and try to determine the post ID it represents.
+ *
+ * Checks are supposedly from the hosted site blog.
+ *
+ * @since 1.0.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ * @global WP         $wp
+ *
+ * @param string $url Permalink to check.
+ * @return int Post ID, or 0 on failure.
+ */
+function url_to_postid( $url ) {
+    global $wp_rewrite;
+    /**
+     * Filter the URL to derive the post ID from.
+     *
+     * @since 2.2.0
+     *
+     * @param string $url The URL to derive the post ID from.
+     */
+    $url = apply_filters( 'url_to_postid', $url );
+    // First, check to see if there is a 'p=N' or 'page_id=N' to match against
+    if ( preg_match('#[?&](p|page_id|attachment_id)=(\d+)#', $url, $values) )   {
+        $id = absint($values[2]);
+        if ( $id )
+            return $id;
+    }
+    // Check to see if we are using rewrite rules
+    $rewrite = $wp_rewrite->wp_rewrite_rules();
+    // Not using rewrite rules, and 'p=N' and 'page_id=N' methods failed, so we're out of options
+    if ( empty($rewrite) )
+        return 0;
+    // Get rid of the #anchor
+    $url_split = explode('#', $url);
+    $url = $url_split[0];
+    // Get rid of URL ?query=string
+    $url_split = explode('?', $url);
+    $url = $url_split[0];
+    // Add 'www.' if it is absent and should be there
+    if ( false !== strpos(home_url(), '://www.') && false === strpos($url, '://www.') )
+        $url = str_replace('://', '://www.', $url);
+    // Strip 'www.' if it is present and shouldn't be
+    if ( false === strpos(home_url(), '://www.') )
+        $url = str_replace('://www.', '://', $url);
+    // Strip 'index.php/' if we're not using path info permalinks
+    if ( !$wp_rewrite->using_index_permalinks() )
+        $url = str_replace( $wp_rewrite->index . '/', '', $url );
+    if ( false !== strpos( trailingslashit( $url ), home_url( '/' ) ) ) {
+        // Chop off http://domain.com/[path]
+        $url = str_replace(home_url(), '', $url);
+    } else {
+        // Chop off /path/to/blog
+        $home_path = parse_url( home_url( '/' ) );
+        $home_path = isset( $home_path['path'] ) ? $home_path['path'] : '' ;
+        $url = preg_replace( sprintf( '#^%s#', preg_quote( $home_path ) ), '', trailingslashit( $url ) );
+    }
+    // Trim leading and lagging slashes
+    $url = trim($url, '/');
+    $request = $url;
+    $post_type_query_vars = array();
+    foreach ( get_post_types( array() , 'objects' ) as $post_type => $t ) {
+        if ( ! empty( $t->query_var ) )
+            $post_type_query_vars[ $t->query_var ] = $post_type;
+    }
+    // Look for matches.
+    $request_match = $request;
+    foreach ( (array)$rewrite as $match => $query) {
+        // If the requesting file is the anchor of the match, prepend it
+        // to the path info.
+        if ( !empty($url) && ($url != $request) && (strpos($match, $url) === 0) )
+            $request_match = $url . '/' . $request;
+        if ( preg_match("#^$match#", $request_match, $matches) ) {
+            if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
+                // This is a verbose page match, let's check to be sure about it.
+                if ( ! get_page_by_path( $matches[ $varmatch[1] ] ) )
+                    continue;
+            }
+            // Got a match.
+            // Trim the query of everything up to the '?'.
+            $query = preg_replace("!^.+\?!", '', $query);
+            // Substitute the substring matches into the query.
+            $query = addslashes(WP_MatchesMapRegex::apply($query, $matches));
+            // Filter out non-public query vars
+            global $wp;
+            parse_str( $query, $query_vars );
+            $query = array();
+            foreach ( (array) $query_vars as $key => $value ) {
+                if ( in_array( $key, $wp->public_query_vars ) ){
+                    $query[$key] = $value;
+                    if ( isset( $post_type_query_vars[$key] ) ) {
+                        $query['post_type'] = $post_type_query_vars[$key];
+                        $query['name'] = $value;
+                    }
+                }
+            }
+            // Resolve conflicts between posts with numeric slugs and date archive queries.
+            $query = wp_resolve_numeric_slug_conflicts( $query );
+            // Do the query
+            $query = new WP_Query( $query );
+            if ( ! empty( $query->posts ) && $query->is_singular )
+                return $query->post->ID;
+            else
+                return 0;
+        }
+    }
+    return 0;
+}
+/**
+ * WordPress Rewrite Component.
+ *
+ * The WordPress Rewrite class writes the rewrite module rules to the .htaccess
+ * file. It also handles parsing the request to get the correct setup for the
+ * WordPress Query class.
+ *
+ * The Rewrite along with WP class function as a front controller for WordPress.
+ * You can add rules to trigger your page view and processing using this
+ * component. The full functionality of a front controller does not exist,
+ * meaning you can't define how the template files load based on the rewrite
+ * rules.
+ *
+ * @since 1.5.0
+ */
+class WP_Rewrite {
+    /**
+     * Permalink structure for posts.
+     *
+     * @since 1.5.0
+     * @var string
+     */
+    public $permalink_structure;
+    /**
+     * Whether to add trailing slashes.
+     *
+     * @since 2.2.0
+     * @var bool
+     */
+    public $use_trailing_slashes;
+    /**
+     * Base for the author permalink structure (example.com/$author_base/authorname).
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $author_base = 'author';
+    /**
+     * Permalink structure for author archives.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $author_structure;
+    /**
+     * Permalink structure for date archives.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $date_structure;
+    /**
+     * Permalink structure for pages.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $page_structure;
+    /**
+     * Base of the search permalink structure (example.com/$search_base/query).
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $search_base = 'search';
+    /**
+     * Permalink structure for searches.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $search_structure;
+    /**
+     * Comments permalink base.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $comments_base = 'comments';
+    /**
+     * Pagination permalink base.
+     *
+     * @since 3.1.0
+     * @var string
+     */
+    public $pagination_base = 'page';
+    /**
+     * Comments pagination permalink base.
+     *
+     * @since 4.2.0
+     * @access private
+     * @var string
+     */
+    var $comments_pagination_base = 'comment-page';
+    /**
+     * Feed permalink base.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $feed_base = 'feed';
+    /**
+     * Comments feed permalink structure.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $comment_feed_structure;
+    /**
+     * Feed request permalink structure.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $feed_structure;
+    /**
+     * The static portion of the post permalink structure.
+     *
+     * If the permalink structure is "/archive/%post_id%" then the front
+     * is "/archive/". If the permalink structure is "/%year%/%postname%/"
+     * then the front is "/".
+     *
+     * @see WP_Rewrite::init()
+     * @since 1.5.0
+     * @var string
+     */
+    public $front;
+    /**
+     * The prefix for all permalink structures.
+     *
+     * If PATHINFO/index permalinks are in use then the root is the value of
+     * {@link WP_Rewrite::$index} with a trailing slash appended. Otherwise
+     * the root will be empty.
+     *
+     * @see WP_Rewrite::init()
+     * @see WP_Rewrite::using_index_permalinks()
+     * @since 1.5.0
+     * @var string
+     */
+    public $root = '';
+    /**
+     * The name of the index file which is the entry point to all requests.
+     *
+     * @since 1.5.0
+     * @access public
+     * @var string
+     */
+    public $index = 'index.php';
+    /**
+     * Variable name to use for regex matches in the rewritten query.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var string
+     */
+    var $matches = '';
+    /**
+     * Rewrite rules to match against the request to find the redirect or query.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var array
+     */
+    var $rules;
+    /**
+     * Additional rules added external to the rewrite class.
+     *
+     * Those not generated by the class, see add_rewrite_rule().
+     *
+     * @since 2.1.0
+     * @access private
+     * @var array
+     */
+    var $extra_rules = array();
+    /**
+     * Additional rules that belong at the beginning to match first.
+     *
+     * Those not generated by the class, see add_rewrite_rule().
+     *
+     * @since 2.3.0
+     * @access private
+     * @var array
+     */
+    var $extra_rules_top = array();
+    /**
+     * Rules that don't redirect to WordPress' index.php.
+     *
+     * These rules are written to the mod_rewrite portion of the .htaccess,
+     * and are added by {@link add_external_rule()}.
+     *
+     * @since 2.1.0
+     * @access private
+     * @var array
+     */
+    var $non_wp_rules = array();
+    /**
+     * Extra permalink structures, e.g. categories, added by {@link add_permastruct()}.
+     *
+     * @since 2.1.0
+     * @access private
+     * @var array
+     */
+    var $extra_permastructs = array();
+    /**
+     * Endpoints (like /trackback/) added by {@link add_rewrite_endpoint()}.
+     *
+     * @since 2.1.0
+     * @access private
+     * @var array
+     */
+    var $endpoints;
+    /**
+     * Whether to write every mod_rewrite rule for WordPress into the .htaccess file.
+     *
+     * This is off by default, turning it on might print a lot of rewrite rules
+     * to the .htaccess file.
+     *
+     * @see WP_Rewrite::mod_rewrite_rules()
+     * @since 2.0.0
+     * @access public
+     * @var bool
+     */
+    public $use_verbose_rules = false;
+    /**
+     * Could post permalinks be confused with those of pages?
+     *
+     * If the first rewrite tag in the post permalink structure is one that could
+     * also match a page name (e.g. %postname% or %author%) then this flag is
+     * set to true. Prior to WordPress 3.3 this flag indicated that every page
+     * would have a set of rules added to the top of the rewrite rules array.
+     * Now it tells {@link WP::parse_request()} to check if a URL matching the
+     * page permastruct is actually a page before accepting it.
+     *
+     * @link https://core.trac.wordpress.org/ticket/16687
+     * @see WP_Rewrite::init()
+     * @since 2.5.0
+     * @access public
+     * @var bool
+     */
+    public $use_verbose_page_rules = true;
+    /**
+     * Rewrite tags that can be used in permalink structures.
+     *
+     * These are translated into the regular expressions stored in
+     * {@link WP_Rewrite::$rewritereplace} and are rewritten to the
+     * query variables listed in {@link WP_Rewrite::$queryreplace}.
+     *
+     * Additional tags can be added with {@link add_rewrite_tag()}.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var array
+     */
+    var $rewritecode = array(
+        '%year%',
+        '%monthnum%',
+        '%day%',
+        '%hour%',
+        '%minute%',
+        '%second%',
+        '%postname%',
+        '%post_id%',
+        '%author%',
+        '%pagename%',
+        '%search%'
+    );
+    /**
+     * Regular expressions to be substituted into rewrite rules in place
+     * of rewrite tags, see {@link WP_Rewrite::$rewritecode}.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var array
+     */
+    var $rewritereplace = array(
+        '([0-9]{4})',
+        '([0-9]{1,2})',
+        '([0-9]{1,2})',
+        '([0-9]{1,2})',
+        '([0-9]{1,2})',
+        '([0-9]{1,2})',
+        '([^/]+)',
+        '([0-9]+)',
+        '([^/]+)',
+        '([^/]+?)',
+        '(.+)'
+    );
+    /**
+     * Query variables that rewrite tags map to, see {@link WP_Rewrite::$rewritecode}.
+     *
+     * @since 1.5.0
+     * @access private
+     * @var array
+     */
+    var $queryreplace = array(
+        'year=',
+        'monthnum=',
+        'day=',
+        'hour=',
+        'minute=',
+        'second=',
+        'name=',
+        'p=',
+        'author_name=',
+        'pagename=',
+        's='
+    );
+    /**
+     * Supported default feeds.
+     *
+     * @since 1.5.0
+     * @var array
+     */
+    public $feeds = array( 'feed', 'rdf', 'rss', 'rss2', 'atom' );
+    /**
+     * Whether permalinks are being used.
+     *
+     * This can be either rewrite module or permalink in the HTTP query string.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return bool True, if permalinks are enabled.
+     */
+    public function using_permalinks() {
+        return ! empty($this->permalink_structure);
+    }
+    /**
+     * Whether permalinks are being used and rewrite module is not enabled.
+     *
+     * Means that permalink links are enabled and index.php is in the URL.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return bool
+     */
+    public function using_index_permalinks() {
+        if ( empty( $this->permalink_structure ) ) {
+            return false;
+        }
+        // If the index is not in the permalink, we're using mod_rewrite.
+        return preg_match( '#^/*' . $this->index . '#', $this->permalink_structure );
+    }
+    /**
+     * Whether permalinks are being used and rewrite module is enabled.
+     *
+     * Using permalinks and index.php is not in the URL.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return bool
+     */
+    public function using_mod_rewrite_permalinks() {
+        return $this->using_permalinks() && ! $this->using_index_permalinks();
+    }
+    /**
+     * Index for matches for usage in preg_*() functions.
+     *
+     * The format of the string is, with empty matches property value, '$NUM'.
+     * The 'NUM' will be replaced with the value in the $number parameter. With
+     * the matches property not empty, the value of the returned string will
+     * contain that value of the matches property. The format then will be
+     * '$MATCHES[NUM]', with MATCHES as the value in the property and NUM the
+     * value of the $number parameter.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @param int $number Index number.
+     * @return string
+     */
+    public function preg_index($number) {
+        $match_prefix = '$';
+        $match_suffix = '';
+        if ( ! empty($this->matches) ) {
+            $match_prefix = '$' . $this->matches . '[';
+            $match_suffix = ']';
+        }
+        return "$match_prefix$number$match_suffix";
+    }
+    /**
+     * Retrieve all page and attachments for pages URIs.
+     *
+     * The attachments are for those that have pages as parents and will be
+     * retrieved.
+     *
+     * @since 2.5.0
+     * @access public
+     *
+     * @global wpdb $wpdb
+     *
+     * @return array Array of page URIs as first element and attachment URIs as second element.
+     */
+    public function page_uri_index() {
+        global $wpdb;
+        //get pages in order of hierarchy, i.e. children after parents
+        $pages = $wpdb->get_results("SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_type = 'page' AND post_status != 'auto-draft'");
+        $posts = get_page_hierarchy( $pages );
+        // If we have no pages get out quick
+        if ( !$posts )
+            return array( array(), array() );
+        //now reverse it, because we need parents after children for rewrite rules to work properly
+        $posts = array_reverse($posts, true);
+        $page_uris = array();
+        $page_attachment_uris = array();
+        foreach ( $posts as $id => $post ) {
+            // URL => page name
+            $uri = get_page_uri($id);
+            $attachments = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_type = 'attachment' AND post_parent = %d", $id ));
+            if ( !empty($attachments) ) {
+                foreach ( $attachments as $attachment ) {
+                    $attach_uri = get_page_uri($attachment->ID);
+                    $page_attachment_uris[$attach_uri] = $attachment->ID;
+                }
+            }
+            $page_uris[$uri] = $id;
+        }
+        return array( $page_uris, $page_attachment_uris );
+    }
+    /**
+     * Retrieve all of the rewrite rules for pages.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return array
+     */
+    public function page_rewrite_rules() {
+        // the extra .? at the beginning prevents clashes with other regular expressions in the rules array
+        $this->add_rewrite_tag( '%pagename%', '(.?.+?)', 'pagename=' );
+        return $this->generate_rewrite_rules( $this->get_page_permastruct(), EP_PAGES, true, true, false, false );
+    }
+    /**
+     * Retrieve date permalink structure, with year, month, and day.
+     *
+     * The permalink structure for the date, if not set already depends on the
+     * permalink structure. It can be one of three formats. The first is year,
+     * month, day; the second is day, month, year; and the last format is month,
+     * day, year. These are matched against the permalink structure for which
+     * one is used. If none matches, then the default will be used, which is
+     * year, month, day.
+     *
+     * Prevents post ID and date permalinks from overlapping. In the case of
+     * post_id, the date permalink will be prepended with front permalink with
+     * 'date/' before the actual permalink to form the complete date permalink
+     * structure.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string|false False on no permalink structure. Date permalink structure.
+     */
+    public function get_date_permastruct() {
+        if ( isset($this->date_structure) )
+            return $this->date_structure;
+        if ( empty($this->permalink_structure) ) {
+            $this->date_structure = '';
+            return false;
+        }
+        // The date permalink must have year, month, and day separated by slashes.
+        $endians = array('%year%/%monthnum%/%day%', '%day%/%monthnum%/%year%', '%monthnum%/%day%/%year%');
+        $this->date_structure = '';
+        $date_endian = '';
+        foreach ( $endians as $endian ) {
+            if ( false !== strpos($this->permalink_structure, $endian) ) {
+                $date_endian= $endian;
+                break;
+            }
+        }
+        if ( empty($date_endian) )
+            $date_endian = '%year%/%monthnum%/%day%';
+        // Do not allow the date tags and %post_id% to overlap in the permalink
+        // structure. If they do, move the date tags to $front/date/.
+        $front = $this->front;
+        preg_match_all('/%.+?%/', $this->permalink_structure, $tokens);
+        $tok_index = 1;
+        foreach ( (array) $tokens[0] as $token) {
+            if ( '%post_id%' == $token && ($tok_index <= 3) ) {
+                $front = $front . 'date/';
+                break;
+            }
+            $tok_index++;
+        }
+        $this->date_structure = $front . $date_endian;
+        return $this->date_structure;
+    }
+    /**
+     * Retrieve the year permalink structure without month and day.
+     *
+     * Gets the date permalink structure and strips out the month and day
+     * permalink structures.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return false|string False on failure. Year structure on success.
+     */
+    public function get_year_permastruct() {
+        $structure = $this->get_date_permastruct();
+        if ( empty($structure) )
+            return false;
+        $structure = str_replace('%monthnum%', '', $structure);
+        $structure = str_replace('%day%', '', $structure);
+        $structure = preg_replace('#/+#', '/', $structure);
+        return $structure;
+    }
+    /**
+     * Retrieve the month permalink structure without day and with year.
+     *
+     * Gets the date permalink structure and strips out the day permalink
+     * structures. Keeps the year permalink structure.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return false|string False on failure. Year/Month structure on success.
+     */
+    public function get_month_permastruct() {
+        $structure = $this->get_date_permastruct();
+        if ( empty($structure) )
+            return false;
+        $structure = str_replace('%day%', '', $structure);
+        $structure = preg_replace('#/+#', '/', $structure);
+        return $structure;
+    }
+    /**
+     * Retrieve the day permalink structure with month and year.
+     *
+     * Keeps date permalink structure with all year, month, and day.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string|false False on failure. Year/Month/Day structure on success.
+     */
+    public function get_day_permastruct() {
+        return $this->get_date_permastruct();
+    }
+    /**
+     * Retrieve the permalink structure for categories.
+     *
+     * If the category_base property has no value, then the category structure
+     * will have the front property value, followed by 'category', and finally
+     * '%category%'. If it does, then the root property will be used, along with
+     * the category_base property value.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string|false False on failure. Category permalink structure.
+     */
+    public function get_category_permastruct() {
+        return $this->get_extra_permastruct('category');
+    }
+    /**
+     * Retrieve the permalink structure for tags.
+     *
+     * If the tag_base property has no value, then the tag structure will have
+     * the front property value, followed by 'tag', and finally '%tag%'. If it
+     * does, then the root property will be used, along with the tag_base
+     * property value.
+     *
+     * @since 2.3.0
+     * @access public
+     *
+     * @return string|false False on failure. Tag permalink structure.
+     */
+    public function get_tag_permastruct() {
+        return $this->get_extra_permastruct('post_tag');
+    }
+    /**
+     * Retrieve extra permalink structure by name.
+     *
+     * @since 2.5.0
+     * @access public
+     *
+     * @param string $name Permalink structure name.
+     * @return string|false False if not found. Permalink structure string.
+     */
+    public function get_extra_permastruct($name) {
+        if ( empty($this->permalink_structure) )
+            return false;
+        if ( isset($this->extra_permastructs[$name]) )
+            return $this->extra_permastructs[$name]['struct'];
+        return false;
+    }
+    /**
+     * Retrieve the author permalink structure.
+     *
+     * The permalink structure is front property, author base, and finally
+     * '/%author%'. Will set the author_structure property and then return it
+     * without attempting to set the value again.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string|false False if not found. Permalink structure string.
+     */
+    public function get_author_permastruct() {
+        if ( isset($this->author_structure) )
+            return $this->author_structure;
+        if ( empty($this->permalink_structure) ) {
+            $this->author_structure = '';
+            return false;
+        }
+        $this->author_structure = $this->front . $this->author_base . '/%author%';
+        return $this->author_structure;
+    }
+    /**
+     * Retrieve the search permalink structure.
+     *
+     * The permalink structure is root property, search base, and finally
+     * '/%search%'. Will set the search_structure property and then return it
+     * without attempting to set the value again.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string|false False if not found. Permalink structure string.
+     */
+    public function get_search_permastruct() {
+        if ( isset($this->search_structure) )
+            return $this->search_structure;
+        if ( empty($this->permalink_structure) ) {
+            $this->search_structure = '';
+            return false;
+        }
+        $this->search_structure = $this->root . $this->search_base . '/%search%';
+        return $this->search_structure;
+    }
+    /**
+     * Retrieve the page permalink structure.
+     *
+     * The permalink structure is root property, and '%pagename%'. Will set the
+     * page_structure property and then return it without attempting to set the
+     * value again.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string|false False if not found. Permalink structure string.
+     */
+    public function get_page_permastruct() {
+        if ( isset($this->page_structure) )
+            return $this->page_structure;
+        if (empty($this->permalink_structure)) {
+            $this->page_structure = '';
+            return false;
+        }
+        $this->page_structure = $this->root . '%pagename%';
+        return $this->page_structure;
+    }
+    /**
+     * Retrieve the feed permalink structure.
+     *
+     * The permalink structure is root property, feed base, and finally
+     * '/%feed%'. Will set the feed_structure property and then return it
+     * without attempting to set the value again.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string|false False if not found. Permalink structure string.
+     */
+    public function get_feed_permastruct() {
+        if ( isset($this->feed_structure) )
+            return $this->feed_structure;
+        if ( empty($this->permalink_structure) ) {
+            $this->feed_structure = '';
+            return false;
+        }
+        $this->feed_structure = $this->root . $this->feed_base . '/%feed%';
+        return $this->feed_structure;
+    }
+    /**
+     * Retrieve the comment feed permalink structure.
+     *
+     * The permalink structure is root property, comment base property, feed
+     * base and finally '/%feed%'. Will set the comment_feed_structure property
+     * and then return it without attempting to set the value again.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string|false False if not found. Permalink structure string.
+     */
+    public function get_comment_feed_permastruct() {
+        if ( isset($this->comment_feed_structure) )
+            return $this->comment_feed_structure;
+        if (empty($this->permalink_structure)) {
+            $this->comment_feed_structure = '';
+            return false;
+        }
+        $this->comment_feed_structure = $this->root . $this->comments_base . '/' . $this->feed_base . '/%feed%';
+        return $this->comment_feed_structure;
+    }
+    /**
+     * Add or update existing rewrite tags (e.g. %postname%).
+     *
+     * If the tag already exists, replace the existing pattern and query for
+     * that tag, otherwise add the new tag.
+     *
+     * @see WP_Rewrite::$rewritecode
+     * @see WP_Rewrite::$rewritereplace
+     * @see WP_Rewrite::$queryreplace
+     * @since 1.5.0
+     * @access public
+     *
+     * @param string $tag   Name of the rewrite tag to add or update.
+     * @param string $regex Regular expression to substitute the tag for in rewrite rules.
+     * @param string $query String to append to the rewritten query. Must end in '='.
+     */
+    public function add_rewrite_tag( $tag, $regex, $query ) {
+        $position = array_search( $tag, $this->rewritecode );
+        if ( false !== $position && null !== $position ) {
+            $this->rewritereplace[ $position ] = $regex;
+            $this->queryreplace[ $position ] = $query;
+        } else {
+            $this->rewritecode[] = $tag;
+            $this->rewritereplace[] = $regex;
+            $this->queryreplace[] = $query;
+        }
+    }
+    /**
+     * Generate rewrite rules from a permalink structure.
+     *
+     * The main WP_Rewrite function for building the rewrite rule list. The
+     * contents of the function is a mix of black magic and regular expressions,
+     * so best just ignore the contents and move to the parameters.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @param string $permalink_structure The permalink structure.
+     * @param int    $ep_mask             Endpoint mask defining what endpoints are added to the structure. Default is EP_NONE.
+     * @param bool   $paged               Should archive pagination rules be added for the structure? Default is true.
+     * @param bool   $feed                Should feed rewrite rules be added for the structure? Default is true.
+     * @param bool   $forcomments         Should the feed rules be a query for a comments feed? Default is false.
+     * @param bool   $walk_dirs           Should the 'directories' making up the structure be walked over and rewrite rules
+     *                                    built for each in turn? Default is true.
+     * @param bool   $endpoints           Should endpoints be applied to the generated rewrite rules? Default is true.
+     * @return array Rewrite rule list.
+     */
+    public function generate_rewrite_rules($permalink_structure, $ep_mask = EP_NONE, $paged = true, $feed = true, $forcomments = false, $walk_dirs = true, $endpoints = true) {
+        //build a regex to match the feed section of URLs, something like (feed|atom|rss|rss2)/?
+        $feedregex2 = '';
+        foreach ( (array) $this->feeds as $feed_name)
+            $feedregex2 .= $feed_name . '|';
+        $feedregex2 = '(' . trim($feedregex2, '|') . ')/?$';
+        //$feedregex is identical but with /feed/ added on as well, so URLs like <permalink>/feed/atom
+        //and <permalink>/atom are both possible
+        $feedregex = $this->feed_base . '/' . $feedregex2;
+        //build a regex to match the trackback and page/xx parts of URLs
+        $trackbackregex = 'trackback/?$';
+        $pageregex = $this->pagination_base . '/?([0-9]{1,})/?$';
+        $commentregex = $this->comments_pagination_base . '-([0-9]{1,})/?$';
+        //build up an array of endpoint regexes to append => queries to append
+        if ( $endpoints ) {
+            $ep_query_append = array ();
+            foreach ( (array) $this->endpoints as $endpoint) {
+                //match everything after the endpoint name, but allow for nothing to appear there
+                $epmatch = $endpoint[1] . '(/(.*))?/?$';
+                //this will be appended on to the rest of the query for each dir
+                $epquery = '&' . $endpoint[2] . '=';
+                $ep_query_append[$epmatch] = array ( $endpoint[0], $epquery );
+            }
+        }
+        //get everything up to the first rewrite tag
+        $front = substr($permalink_structure, 0, strpos($permalink_structure, '%'));
+        //build an array of the tags (note that said array ends up being in $tokens[0])
+        preg_match_all('/%.+?%/', $permalink_structure, $tokens);
+        $num_tokens = count($tokens[0]);
+        $index = $this->index; //probably 'index.php'
+        $feedindex = $index;
+        $trackbackindex = $index;
+        //build a list from the rewritecode and queryreplace arrays, that will look something like
+        //tagname=$matches[i] where i is the current $i
+        $queries = array();
+        for ( $i = 0; $i < $num_tokens; ++$i ) {
+            if ( 0 < $i )
+                $queries[$i] = $queries[$i - 1] . '&';
+            else
+                $queries[$i] = '';
+            $query_token = str_replace($this->rewritecode, $this->queryreplace, $tokens[0][$i]) . $this->preg_index($i+1);
+            $queries[$i] .= $query_token;
+        }
+        //get the structure, minus any cruft (stuff that isn't tags) at the front
+        $structure = $permalink_structure;
+        if ( $front != '/' )
+            $structure = str_replace($front, '', $structure);
+        //create a list of dirs to walk over, making rewrite rules for each level
+        //so for example, a $structure of /%year%/%monthnum%/%postname% would create
+        //rewrite rules for /%year%/, /%year%/%monthnum%/ and /%year%/%monthnum%/%postname%
+        $structure = trim($structure, '/');
+        $dirs = $walk_dirs ? explode('/', $structure) : array( $structure );
+        $num_dirs = count($dirs);
+        //strip slashes from the front of $front
+        $front = preg_replace('|^/+|', '', $front);
+        //the main workhorse loop
+        $post_rewrite = array();
+        $struct = $front;
+        for ( $j = 0; $j < $num_dirs; ++$j ) {
+            //get the struct for this dir, and trim slashes off the front
+            $struct .= $dirs[$j] . '/'; //accumulate. see comment near explode('/', $structure) above
+            $struct = ltrim($struct, '/');
+            //replace tags with regexes
+            $match = str_replace($this->rewritecode, $this->rewritereplace, $struct);
+            //make a list of tags, and store how many there are in $num_toks
+            $num_toks = preg_match_all('/%.+?%/', $struct, $toks);
+            //get the 'tagname=$matches[i]'
+            $query = ( ! empty( $num_toks ) && isset( $queries[$num_toks - 1] ) ) ? $queries[$num_toks - 1] : '';
+            //set up $ep_mask_specific which is used to match more specific URL types
+            switch ( $dirs[$j] ) {
+                case '%year%':
+                    $ep_mask_specific = EP_YEAR;
+                    break;
+                case '%monthnum%':
+                    $ep_mask_specific = EP_MONTH;
+                    break;
+                case '%day%':
+                    $ep_mask_specific = EP_DAY;
+                    break;
+                default:
+                    $ep_mask_specific = EP_NONE;
+            }
+            //create query for /page/xx
+            $pagematch = $match . $pageregex;
+            $pagequery = $index . '?' . $query . '&paged=' . $this->preg_index($num_toks + 1);
+            //create query for /comment-page-xx
+            $commentmatch = $match . $commentregex;
+            $commentquery = $index . '?' . $query . '&cpage=' . $this->preg_index($num_toks + 1);
+            if ( get_option('page_on_front') ) {
+                //create query for Root /comment-page-xx
+                $rootcommentmatch = $match . $commentregex;
+                $rootcommentquery = $index . '?' . $query . '&page_id=' . get_option('page_on_front') . '&cpage=' . $this->preg_index($num_toks + 1);
+            }
+            //create query for /feed/(feed|atom|rss|rss2|rdf)
+            $feedmatch = $match . $feedregex;
+            $feedquery = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);
+            //create query for /(feed|atom|rss|rss2|rdf) (see comment near creation of $feedregex)
+            $feedmatch2 = $match . $feedregex2;
+            $feedquery2 = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);
+            //if asked to, turn the feed queries into comment feed ones
+            if ( $forcomments ) {
+                $feedquery .= '&withcomments=1';
+                $feedquery2 .= '&withcomments=1';
+            }
+            //start creating the array of rewrites for this dir
+            $rewrite = array();
+            if ( $feed ) //...adding on /feed/ regexes => queries
+                $rewrite = array($feedmatch => $feedquery, $feedmatch2 => $feedquery2);
+            if ( $paged ) //...and /page/xx ones
+                $rewrite = array_merge($rewrite, array($pagematch => $pagequery));
+            //only on pages with comments add ../comment-page-xx/
+            if ( EP_PAGES & $ep_mask || EP_PERMALINK & $ep_mask ) {
+                $rewrite = array_merge($rewrite, array($commentmatch => $commentquery));
+            } elseif ( EP_ROOT & $ep_mask && get_option('page_on_front') ) {
+                $rewrite = array_merge($rewrite, array($rootcommentmatch => $rootcommentquery));
+            }
+            //do endpoints
+            if ( $endpoints ) {
+                foreach ( (array) $ep_query_append as $regex => $ep) {
+                    //add the endpoints on if the mask fits
+                    if ( $ep[0] & $ep_mask || $ep[0] & $ep_mask_specific )
+                        $rewrite[$match . $regex] = $index . '?' . $query . $ep[1] . $this->preg_index($num_toks + 2);
+                }
+            }
+            //if we've got some tags in this dir
+            if ( $num_toks ) {
+                $post = false;
+                $page = false;
+                //check to see if this dir is permalink-level: i.e. the structure specifies an
+                //individual post. Do this by checking it contains at least one of 1) post name,
+                //2) post ID, 3) page name, 4) timestamp (year, month, day, hour, second and
+                //minute all present). Set these flags now as we need them for the endpoints.
+                if ( strpos($struct, '%postname%') !== false
+                        || strpos($struct, '%post_id%') !== false
+                        || strpos($struct, '%pagename%') !== false
+                        || (strpos($struct, '%year%') !== false && strpos($struct, '%monthnum%') !== false && strpos($struct, '%day%') !== false && strpos($struct, '%hour%') !== false && strpos($struct, '%minute%') !== false && strpos($struct, '%second%') !== false)
+                        ) {
+                    $post = true;
+                    if ( strpos($struct, '%pagename%') !== false )
+                        $page = true;
+                }
+                if ( ! $post ) {
+                    // For custom post types, we need to add on endpoints as well.
+                    foreach ( get_post_types( array('_builtin' => false ) ) as $ptype ) {
+                        if ( strpos($struct, "%$ptype%") !== false ) {
+                            $post = true;
+                            $page = is_post_type_hierarchical( $ptype ); // This is for page style attachment url's
+                            break;
+                        }
+                    }
+                }
+                //if we're creating rules for a permalink, do all the endpoints like attachments etc
+                if ( $post ) {
+                    //create query and regex for trackback
+                    $trackbackmatch = $match . $trackbackregex;
+                    $trackbackquery = $trackbackindex . '?' . $query . '&tb=1';
+                    //trim slashes from the end of the regex for this dir
+                    $match = rtrim($match, '/');
+                    //get rid of brackets
+                    $submatchbase = str_replace( array('(', ')'), '', $match);
+                    //add a rule for at attachments, which take the form of <permalink>/some-text
+                    $sub1 = $submatchbase . '/([^/]+)/';
+                    $sub1tb = $sub1 . $trackbackregex; //add trackback regex <permalink>/trackback/...
+                    $sub1feed = $sub1 . $feedregex; //and <permalink>/feed/(atom|...)
+                    $sub1feed2 = $sub1 . $feedregex2; //and <permalink>/(feed|atom...)
+                    $sub1comment = $sub1 . $commentregex; //and <permalink>/comment-page-xx
+                    //add another rule to match attachments in the explicit form:
+                    //<permalink>/attachment/some-text
+                    $sub2 = $submatchbase . '/attachment/([^/]+)/';
+                    $sub2tb = $sub2 . $trackbackregex; //and add trackbacks <permalink>/attachment/trackback
+                    $sub2feed = $sub2 . $feedregex;    //feeds, <permalink>/attachment/feed/(atom|...)
+                    $sub2feed2 = $sub2 . $feedregex2;  //and feeds again on to this <permalink>/attachment/(feed|atom...)
+                    $sub2comment = $sub2 . $commentregex; //and <permalink>/comment-page-xx
+                    //create queries for these extra tag-ons we've just dealt with
+                    $subquery = $index . '?attachment=' . $this->preg_index(1);
+                    $subtbquery = $subquery . '&tb=1';
+                    $subfeedquery = $subquery . '&feed=' . $this->preg_index(2);
+                    $subcommentquery = $subquery . '&cpage=' . $this->preg_index(2);
+                    //do endpoints for attachments
+                    if ( !empty($endpoints) ) {
+                        foreach ( (array) $ep_query_append as $regex => $ep ) {
+                            if ( $ep[0] & EP_ATTACHMENT ) {
+                                $rewrite[$sub1 . $regex] = $subquery . $ep[1] . $this->preg_index(3);
+                                $rewrite[$sub2 . $regex] = $subquery . $ep[1] . $this->preg_index(3);
+                            }
+                        }
+                    }
+                    //now we've finished with endpoints, finish off the $sub1 and $sub2 matches
+                    //add a ? as we don't have to match that last slash, and finally a $ so we
+                    //match to the end of the URL
+                    $sub1 .= '?$';
+                    $sub2 .= '?$';
+                    //post pagination, e.g. <permalink>/2/
+                    $match = $match . '(/[0-9]+)?/?$';
+                    $query = $index . '?' . $query . '&page=' . $this->preg_index($num_toks + 1);
+                } else { //not matching a permalink so this is a lot simpler
+                    //close the match and finalise the query
+                    $match .= '?$';
+                    $query = $index . '?' . $query;
+                }
+                //create the final array for this dir by joining the $rewrite array (which currently
+                //only contains rules/queries for trackback, pages etc) to the main regex/query for
+                //this dir
+                $rewrite = array_merge($rewrite, array($match => $query));
+                //if we're matching a permalink, add those extras (attachments etc) on
+                if ( $post ) {
+                    //add trackback
+                    $rewrite = array_merge(array($trackbackmatch => $trackbackquery), $rewrite);
+                    //add regexes/queries for attachments, attachment trackbacks and so on
+                    if ( ! $page ) //require <permalink>/attachment/stuff form for pages because of confusion with subpages
+                        $rewrite = array_merge($rewrite, array($sub1 => $subquery, $sub1tb => $subtbquery, $sub1feed => $subfeedquery, $sub1feed2 => $subfeedquery, $sub1comment => $subcommentquery));
+                    $rewrite = array_merge(array($sub2 => $subquery, $sub2tb => $subtbquery, $sub2feed => $subfeedquery, $sub2feed2 => $subfeedquery, $sub2comment => $subcommentquery), $rewrite);
+                }
+            } //if($num_toks)
+            //add the rules for this dir to the accumulating $post_rewrite
+            $post_rewrite = array_merge($rewrite, $post_rewrite);
+        } //foreach ($dir)
+        return $post_rewrite; //the finished rules. phew!
+    }
+    /**
+     * Generate Rewrite rules with permalink structure and walking directory only.
+     *
+     * Shorten version of {@link WP_Rewrite::generate_rewrite_rules()} that
+     * allows for shorter list of parameters. See the method for longer
+     * description of what generating rewrite rules does.
+     *
+     * @uses WP_Rewrite::generate_rewrite_rules() See for long description and rest of parameters.
+     * @since 1.5.0
+     * @access public
+     *
+     * @param string $permalink_structure The permalink structure to generate rules.
+     * @param bool   $walk_dirs           Optional, default is false. Whether to create list of directories to walk over.
+     * @return array
+     */
+    public function generate_rewrite_rule($permalink_structure, $walk_dirs = false) {
+        return $this->generate_rewrite_rules($permalink_structure, EP_NONE, false, false, false, $walk_dirs);
+    }
+    /**
+     * Construct rewrite matches and queries from permalink structure.
+     *
+     * Runs the action 'generate_rewrite_rules' with the parameter that is an
+     * reference to the current WP_Rewrite instance to further manipulate the
+     * permalink structures and rewrite rules. Runs the 'rewrite_rules_array'
+     * filter on the full rewrite rule array.
+     *
+     * There are two ways to manipulate the rewrite rules, one by hooking into
+     * the 'generate_rewrite_rules' action and gaining full control of the
+     * object or just manipulating the rewrite rule array before it is passed
+     * from the function.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return array An associate array of matches and queries.
+     */
+    public function rewrite_rules() {
+        $rewrite = array();
+        if ( empty($this->permalink_structure) )
+            return $rewrite;
+        // robots.txt -only if installed at the root
+        $home_path = parse_url( home_url() );
+        $robots_rewrite = ( empty( $home_path['path'] ) || '/' == $home_path['path'] ) ? array( 'robots\.txt$' => $this->index . '?robots=1' ) : array();
+        // Old feed and service files
+        $deprecated_files = array(
+            '.*wp-(atom|rdf|rss|rss2|feed|commentsrss2)\.php$' => $this->index . '?feed=old',
+            '.*wp-app\.php(/.*)?$' => $this->index . '?error=403',
+        );
+        // Registration rules
+        $registration_pages = array();
+        if ( is_multisite() && is_main_site() ) {
+            $registration_pages['.*wp-signup.php$'] = $this->index . '?signup=true';
+            $registration_pages['.*wp-activate.php$'] = $this->index . '?activate=true';
+        }
+        $registration_pages['.*wp-register.php$'] = $this->index . '?register=true'; // Deprecated
+        // Post rewrite rules.
+        $post_rewrite = $this->generate_rewrite_rules( $this->permalink_structure, EP_PERMALINK );
+        /**
+         * Filter rewrite rules used for "post" archives.
+         *
+         * @since 1.5.0
+         *
+         * @param array $post_rewrite The rewrite rules for posts.
+         */
+        $post_rewrite = apply_filters( 'post_rewrite_rules', $post_rewrite );
+        // Date rewrite rules.
+        $date_rewrite = $this->generate_rewrite_rules($this->get_date_permastruct(), EP_DATE);
+        /**
+         * Filter rewrite rules used for date archives.
+         *
+         * Likely date archives would include /yyyy/, /yyyy/mm/, and /yyyy/mm/dd/.
+         *
+         * @since 1.5.0
+         *
+         * @param array $date_rewrite The rewrite rules for date archives.
+         */
+        $date_rewrite = apply_filters( 'date_rewrite_rules', $date_rewrite );
+        // Root-level rewrite rules.
+        $root_rewrite = $this->generate_rewrite_rules($this->root . '/', EP_ROOT);
+        /**
+         * Filter rewrite rules used for root-level archives.
+         *
+         * Likely root-level archives would include pagination rules for the homepage
+         * as well as site-wide post feeds (e.g. /feed/, and /feed/atom/).
+         *
+         * @since 1.5.0
+         *
+         * @param array $root_rewrite The root-level rewrite rules.
+         */
+        $root_rewrite = apply_filters( 'root_rewrite_rules', $root_rewrite );
+        // Comments rewrite rules.
+        $comments_rewrite = $this->generate_rewrite_rules($this->root . $this->comments_base, EP_COMMENTS, false, true, true, false);
+        /**
+         * Filter rewrite rules used for comment feed archives.
+         *
+         * Likely comments feed archives include /comments/feed/, and /comments/feed/atom/.
+         *
+         * @since 1.5.0
+         *
+         * @param array $comments_rewrite The rewrite rules for the site-wide comments feeds.
+         */
+        $comments_rewrite = apply_filters( 'comments_rewrite_rules', $comments_rewrite );
+        // Search rewrite rules.
+        $search_structure = $this->get_search_permastruct();
+        $search_rewrite = $this->generate_rewrite_rules($search_structure, EP_SEARCH);
+        /**
+         * Filter rewrite rules used for search archives.
+         *
+         * Likely search-related archives include /search/search+query/ as well as
+         * pagination and feed paths for a search.
+         *
+         * @since 1.5.0
+         *
+         * @param array $search_rewrite The rewrite rules for search queries.
+         */
+        $search_rewrite = apply_filters( 'search_rewrite_rules', $search_rewrite );
+        // Author rewrite rules.
+        $author_rewrite = $this->generate_rewrite_rules($this->get_author_permastruct(), EP_AUTHORS);
+        /**
+         * Filter rewrite rules used for author archives.
+         *
+         * Likely author archives would include /author/author-name/, as well as
+         * pagination and feed paths for author archives.
+         *
+         * @since 1.5.0
+         *
+         * @param array $author_rewrite The rewrite rules for author archives.
+         */
+        $author_rewrite = apply_filters( 'author_rewrite_rules', $author_rewrite );
+        // Pages rewrite rules.
+        $page_rewrite = $this->page_rewrite_rules();
+        /**
+         * Filter rewrite rules used for "page" post type archives.
+         *
+         * @since 1.5.0
+         *
+         * @param array $page_rewrite The rewrite rules for the "page" post type.
+         */
+        $page_rewrite = apply_filters( 'page_rewrite_rules', $page_rewrite );
+        // Extra permastructs.
+        foreach ( $this->extra_permastructs as $permastructname => $struct ) {
+            if ( is_array( $struct ) ) {
+                if ( count( $struct ) == 2 )
+                    $rules = $this->generate_rewrite_rules( $struct[0], $struct[1] );
+                else
+                    $rules = $this->generate_rewrite_rules( $struct['struct'], $struct['ep_mask'], $struct['paged'], $struct['feed'], $struct['forcomments'], $struct['walk_dirs'], $struct['endpoints'] );
+            } else {
+                $rules = $this->generate_rewrite_rules( $struct );
+            }
+            /**
+             * Filter rewrite rules used for individual permastructs.
+             *
+             * The dynamic portion of the hook name, `$permastructname`, refers
+             * to the name of the registered permastruct, e.g. 'post_tag' (tags),
+             * 'category' (categories), etc.
+             *
+             * @since 3.1.0
+             *
+             * @param array $rules The rewrite rules generated for the current permastruct.
+             */
+            $rules = apply_filters( $permastructname . '_rewrite_rules', $rules );
+            if ( 'post_tag' == $permastructname ) {
+                /**
+                 * Filter rewrite rules used specifically for Tags.
+                 *
+                 * @since 2.3.0
+                 * @deprecated 3.1.0 Use 'post_tag_rewrite_rules' instead
+                 *
+                 * @param array $rules The rewrite rules generated for tags.
+                 */
+                $rules = apply_filters( 'tag_rewrite_rules', $rules );
+            }
+            $this->extra_rules_top = array_merge($this->extra_rules_top, $rules);
+        }
+        // Put them together.
+        if ( $this->use_verbose_page_rules )
+            $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite,  $author_rewrite, $date_rewrite, $page_rewrite, $post_rewrite, $this->extra_rules);
+        else
+            $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite,  $author_rewrite, $date_rewrite, $post_rewrite, $page_rewrite, $this->extra_rules);
+        /**
+         * Fires after the rewrite rules are generated.
+         *
+         * @since 1.5.0
+         *
+         * @param WP_Rewrite $this Current WP_Rewrite instance, passed by reference.
+         */
+        do_action_ref_array( 'generate_rewrite_rules', array( &$this ) );
+        /**
+         * Filter the full set of generated rewrite rules.
+         *
+         * @since 1.5.0
+         *
+         * @param array $this->rules The compiled array of rewrite rules.
+         */
+        $this->rules = apply_filters( 'rewrite_rules_array', $this->rules );
+        return $this->rules;
+    }
+    /**
+     * Retrieve the rewrite rules.
+     *
+     * The difference between this method and {@link
+     * WP_Rewrite::rewrite_rules()} is that this method stores the rewrite rules
+     * in the 'rewrite_rules' option and retrieves it. This prevents having to
+     * process all of the permalinks to get the rewrite rules in the form of
+     * caching.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return array Rewrite rules.
+     */
+    public function wp_rewrite_rules() {
+        $this->rules = get_option('rewrite_rules');
+        if ( empty($this->rules) ) {
+            $this->matches = 'matches';
+            $this->rewrite_rules();
+            update_option('rewrite_rules', $this->rules);
+        }
+        return $this->rules;
+    }
+    /**
+     * Retrieve mod_rewrite formatted rewrite rules to write to .htaccess.
+     *
+     * Does not actually write to the .htaccess file, but creates the rules for
+     * the process that will.
+     *
+     * Will add the non_wp_rules property rules to the .htaccess file before
+     * the WordPress rewrite rules one.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @return string
+     */
+    public function mod_rewrite_rules() {
+        if ( ! $this->using_permalinks() )
+            return '';
+        $site_root = parse_url( site_url() );
+        if ( isset( $site_root['path'] ) )
+            $site_root = trailingslashit($site_root['path']);
+        $home_root = parse_url(home_url());
+        if ( isset( $home_root['path'] ) )
+            $home_root = trailingslashit($home_root['path']);
+        else
+            $home_root = '/';
+        $rules = "<IfModule mod_rewrite.c>\n";
+        $rules .= "RewriteEngine On\n";
+        $rules .= "RewriteBase $home_root\n";
+        $rules .= "RewriteRule ^index\.php$ - [L]\n"; // Prevent -f checks on index.php.
+        //add in the rules that don't redirect to WP's index.php (and thus shouldn't be handled by WP at all)
+        foreach ( (array) $this->non_wp_rules as $match => $query) {
+            // Apache 1.3 does not support the reluctant (non-greedy) modifier.
+            $match = str_replace('.+?', '.+', $match);
+            // If the match is unanchored and greedy, prepend rewrite conditions
+            // to avoid infinite redirects and eclipsing of real files.
+            //if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
+                //nada.
+            //}
+            $rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
+        }
+        if ( $this->use_verbose_rules ) {
+            $this->matches = '';
+            $rewrite = $this->rewrite_rules();
+            $num_rules = count($rewrite);
+            $rules .= "RewriteCond %{REQUEST_FILENAME} -f [OR]\n" .
+                "RewriteCond %{REQUEST_FILENAME} -d\n" .
+                "RewriteRule ^.*$ - [S=$num_rules]\n";
+            foreach ( (array) $rewrite as $match => $query) {
+                // Apache 1.3 does not support the reluctant (non-greedy) modifier.
+                $match = str_replace('.+?', '.+', $match);
+                // If the match is unanchored and greedy, prepend rewrite conditions
+                // to avoid infinite redirects and eclipsing of real files.
+                //if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
+                    //nada.
+                //}
+                if ( strpos($query, $this->index) !== false )
+                    $rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
+                else
+                    $rules .= 'RewriteRule ^' . $match . ' ' . $site_root . $query . " [QSA,L]\n";
+            }
+        } else {
+            $rules .= "RewriteCond %{REQUEST_FILENAME} !-f\n" .
+                "RewriteCond %{REQUEST_FILENAME} !-d\n" .
+                "RewriteRule . {$home_root}{$this->index} [L]\n";
+        }
+        $rules .= "</IfModule>\n";
+        /**
+         *
+         * Filter the list of rewrite rules formatted for output to an .htaccess file.
+         *
+         * @since 1.5.0
+         *
+         * @param string $rules mod_rewrite Rewrite rules formatted for .htaccess.
+         */
+        $rules = apply_filters( 'mod_rewrite_rules', $rules );
+        /**
+         * Filter the list of rewrite rules formatted for output to an .htaccess file.
+         *
+         * @since 1.5.0
+         * @deprecated 1.5.0 Use the mod_rewrite_rules filter instead.
+         *
+         * @param string $rules mod_rewrite Rewrite rules formatted for .htaccess.
+         */
+        return apply_filters( 'rewrite_rules', $rules );
+    }
+    /**
+     * Retrieve IIS7 URL Rewrite formatted rewrite rules to write to web.config file.
+     *
+     * Does not actually write to the web.config file, but creates the rules for
+     * the process that will.
+     *
+     * @since 2.8.0
+     * @access public
+     *
+     * @return string
+     */
+    public function iis7_url_rewrite_rules( $add_parent_tags = false ) {
+        if ( ! $this->using_permalinks() )
+            return '';
+        $rules = '';
+        if ( $add_parent_tags ) {
+            $rules .= '<configuration>
+    <system.webServer>
+        <rewrite>
+            <rules>';
+        }
+        $rules .= '
+            <rule name="wordpress" patternSyntax="Wildcard">
+                <match url="*" />
+                    <conditions>
+                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
+                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
+                    </conditions>
+                <action type="Rewrite" url="index.php" />
+            </rule>';
+        if ( $add_parent_tags ) {
+            $rules .= '
+            </rules>
+        </rewrite>
+    </system.webServer>
+</configuration>';
+        }
+        /**
+         * Filter the list of rewrite rules formatted for output to a web.config.
+         *
+         * @since 2.8.0
+         *
+         * @param string $rules Rewrite rules formatted for IIS web.config.
+         */
+        return apply_filters( 'iis7_url_rewrite_rules', $rules );
+    }
+    /**
+     * Add a straight rewrite rule.
+     *
+     * Any value in the $after parameter that isn't 'bottom' will be placed at
+     * the top of the rules.
+     *
+     * @since 2.1.0
+     * @access public
+     *
+     * @param string $regex    Regular expression to match against request.
+     * @param string $redirect URL regex redirects to when regex matches request.
+     * @param string $after    Optional, default is bottom. Location to place rule.
+     */
+    public function add_rule($regex, $redirect, $after = 'bottom') {
+        //get everything up to the first ?
+        $index = (strpos($redirect, '?') === false ? strlen($redirect) : strpos($redirect, '?'));
+        $front = substr($redirect, 0, $index);
+        if ( $front != $this->index ) { //it doesn't redirect to WP's index.php
+            $this->add_external_rule($regex, $redirect);
+        } else {
+            if ( 'bottom' == $after)
+                $this->extra_rules = array_merge($this->extra_rules, array($regex => $redirect));
+            else
+                $this->extra_rules_top = array_merge($this->extra_rules_top, array($regex => $redirect));
+            //$this->extra_rules[$regex] = $redirect;
+        }
+    }
+    /**
+     * Add a rule that doesn't redirect to index.php.
+     *
+     * Can redirect to any place.
+     *
+     * @since 2.1.0
+     * @access public
+     *
+     * @param string $regex    Regular expression to match against request.
+     * @param string $redirect URL regex redirects to when regex matches request.
+     */
+    public function add_external_rule($regex, $redirect) {
+        $this->non_wp_rules[$regex] = $redirect;
+    }
+    /**
+     * Add an endpoint, like /trackback/.
+     *
+     * @since 2.1.0
+     * @since 3.9.0 $query_var parameter added.
+     * @since 4.3.0 Added support for skipping query var registration by passing `false` to `$query_var`.
+     * @access public
+     *
+     * @see add_rewrite_endpoint() for full documentation.
+     *
+     * @global WP $wp
+     *
+     * @param string      $name      Name of the endpoint.
+     * @param int         $places    Endpoint mask describing the places the endpoint should be added.
+     * @param string|bool $query_var Optional. Name of the corresponding query variable. Pass `false` to
+     *                               skip registering a query_var for this endpoint. Defaults to the
+     *                               value of `$name`.
+     */
+    public function add_endpoint( $name, $places, $query_var = true ) {
+        global $wp;
+        // For backward compatibility, if `null` has explicitly been passed as `$query_var`, assume `true`.
+        if ( true === $query_var || null === func_get_arg( 2 ) ) {
+            $query_var = $name;
+        }
+        $this->endpoints[] = array( $places, $name, $query_var );
+        if ( $query_var ) {
+            $wp->add_query_var( $query_var );
+        }
+    }
+    /**
+     * Add a new permalink structure.
+     *
+     * A permalink structure (permastruct) is an abstract definition of a set of rewrite rules; it
+     * is an easy way of expressing a set of regular expressions that rewrite to a set of query strings.
+     * The new permastruct is added to the {@link WP_Rewrite::$extra_permastructs} array. When the
+     * rewrite rules are built by {@link WP_Rewrite::rewrite_rules()} all of these extra permastructs
+     * are passed to {@link WP_Rewrite::generate_rewrite_rules()} which transforms them into the
+     * regular expressions that many love to hate.
+     *
+     * The $args parameter gives you control over how {@link WP_Rewrite::generate_rewrite_rules()}
+     * works on the new permastruct.
+     *
+     * @since 2.5.0
+     * @access public
+     *
+     * @param string $name   Name for permalink structure.
+     * @param string $struct Permalink structure (e.g. category/%category%)
+     * @param array  $args   Optional configuration for building the rules from the permalink structure:
+     *     - with_front (bool) - Should the structure be prepended with WP_Rewrite::$front? Default is true.
+     *     - ep_mask (int) - Endpoint mask defining what endpoints are added to the structure. Default is EP_NONE.
+     *     - paged (bool) - Should archive pagination rules be added for the structure? Default is true.
+     *     - feed (bool) - Should feed rewrite rules be added for the structure? Default is true.
+     *     - forcomments (bool) - Should the feed rules be a query for a comments feed? Default is false.
+     *     - walk_dirs (bool) - Should the 'directories' making up the structure be walked over and rewrite
+     *                          rules built for each in turn? Default is true.
+     *     - endpoints (bool) - Should endpoints be applied to the generated rewrite rules? Default is true.
+     */
+    public function add_permastruct( $name, $struct, $args = array() ) {
+        // backwards compatibility for the old parameters: $with_front and $ep_mask
+        if ( ! is_array( $args ) )
+            $args = array( 'with_front' => $args );
+        if ( func_num_args() == 4 )
+            $args['ep_mask'] = func_get_arg( 3 );
+        $defaults = array(
+            'with_front' => true,
+            'ep_mask' => EP_NONE,
+            'paged' => true,
+            'feed' => true,
+            'forcomments' => false,
+            'walk_dirs' => true,
+            'endpoints' => true,
+        );
+        $args = array_intersect_key( $args, $defaults );
+        $args = wp_parse_args( $args, $defaults );
+        if ( $args['with_front'] )
+            $struct = $this->front . $struct;
+        else
+            $struct = $this->root . $struct;
+        $args['struct'] = $struct;
+        $this->extra_permastructs[ $name ] = $args;
+    }
+    /**
+     * Remove rewrite rules and then recreate rewrite rules.
+     *
+     * Calls {@link WP_Rewrite::wp_rewrite_rules()} after removing the
+     * 'rewrite_rules' option. If the function named 'save_mod_rewrite_rules'
+     * exists, it will be called.
+     *
+     * @since 2.0.1
+     * @access public
+     *
+     * @staticvar bool $do_hard_later
+     *
+     * @param bool $hard Whether to update .htaccess (hard flush) or just update rewrite_rules option (soft flush). Default is true (hard).
+     */
+    public function flush_rules( $hard = true ) {
+        static $do_hard_later = null;
+        // Prevent this action from running before everyone has registered their rewrites
+        if ( ! did_action( 'wp_loaded' ) ) {
+            add_action( 'wp_loaded', array( $this, 'flush_rules' ) );
+            $do_hard_later = ( isset( $do_hard_later ) ) ? $do_hard_later || $hard : $hard;
+            return;
+        }
+        if ( isset( $do_hard_later ) ) {
+            $hard = $do_hard_later;
+            unset( $do_hard_later );
+        }
+        delete_option('rewrite_rules');
+        $this->wp_rewrite_rules();
+        /**
+         * Filter whether a "hard" rewrite rule flush should be performed when requested.
+         *
+         * A "hard" flush updates .htaccess (Apache) or web.config (IIS).
+         *
+         * @since 3.7.0
+         *
+         * @param bool $hard Whether to flush rewrite rules "hard". Default true.
+         */
+        if ( ! $hard || ! apply_filters( 'flush_rewrite_rules_hard', true ) ) {
+            return;
+        }
+        if ( function_exists( 'save_mod_rewrite_rules' ) )
+            save_mod_rewrite_rules();
+        if ( function_exists( 'iis7_save_url_rewrite_rules' ) )
+            iis7_save_url_rewrite_rules();
+    }
+    /**
+     * Sets up the object's properties.
+     *
+     * The 'use_verbose_page_rules' object property will be set to true if the
+     * permalink structure begins with one of the following: '%postname%', '%category%',
+     * '%tag%', or '%author%'.
+     *
+     * @since 1.5.0
+     * @access public
+     */
+    public function init() {
+        $this->extra_rules = $this->non_wp_rules = $this->endpoints = array();
+        $this->permalink_structure = get_option('permalink_structure');
+        $this->front = substr($this->permalink_structure, 0, strpos($this->permalink_structure, '%'));
+        $this->root = '';
+        if ( $this->using_index_permalinks() )
+            $this->root = $this->index . '/';
+        unset($this->author_structure);
+        unset($this->date_structure);
+        unset($this->page_structure);
+        unset($this->search_structure);
+        unset($this->feed_structure);
+        unset($this->comment_feed_structure);
+        $this->use_trailing_slashes = ( '/' == substr($this->permalink_structure, -1, 1) );
+        // Enable generic rules for pages if permalink structure doesn't begin with a wildcard.
+        if ( preg_match("/^[^%]*%(?:postname|category|tag|author)%/", $this->permalink_structure) )
+             $this->use_verbose_page_rules = true;
+        else
+            $this->use_verbose_page_rules = false;
+    }
+    /**
+     * Set the main permalink structure for the blog.
+     *
+     * Will update the 'permalink_structure' option, if there is a difference
+     * between the current permalink structure and the parameter value. Calls
+     * {@link WP_Rewrite::init()} after the option is updated.
+     *
+     * Fires the 'permalink_structure_changed' action once the init call has
+     * processed passing the old and new values
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @param string $permalink_structure Permalink structure.
+     */
+    public function set_permalink_structure($permalink_structure) {
+        if ( $permalink_structure != $this->permalink_structure ) {
+            $old_permalink_structure = $this->permalink_structure;
+            update_option('permalink_structure', $permalink_structure);
+            $this->init();
+            /**
+             * Fires after the permalink structure is updated.
+             *
+             * @since 2.8.0
+             *
+             * @param string $old_permalink_structure The previous permalink structure.
+             * @param string $permalink_structure     The new permalink structure.
+             */
+            do_action( 'permalink_structure_changed', $old_permalink_structure, $permalink_structure );
+        }
+    }
+    /**
+     * Set the category base for the category permalink.
+     *
+     * Will update the 'category_base' option, if there is a difference between
+     * the current category base and the parameter value. Calls
+     * {@link WP_Rewrite::init()} after the option is updated.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     * @param string $category_base Category permalink structure base.
+     */
+    public function set_category_base($category_base) {
+        if ( $category_base != get_option('category_base') ) {
+            update_option('category_base', $category_base);
+            $this->init();
+        }
+    }
+    /**
+     * Set the tag base for the tag permalink.
+     *
+     * Will update the 'tag_base' option, if there is a difference between the
+     * current tag base and the parameter value. Calls
+     * {@link WP_Rewrite::init()} after the option is updated.
+     *
+     * @since 2.3.0
+     * @access public
+     *
+     * @param string $tag_base Tag permalink structure base.
+     */
+    public function set_tag_base( $tag_base ) {
+        if ( $tag_base != get_option( 'tag_base') ) {
+            update_option( 'tag_base', $tag_base );
+            $this->init();
+        }
+    }
+    /**
+     * Constructor - Calls init(), which runs setup.
+     *
+     * @since 1.5.0
+     * @access public
+     *
+     */
+    public function __construct() {
+        $this->init();
+    }
+}
+require_once( ABSPATH . WPINC . '/rewrite-constants.php' );
+require_once( ABSPATH . WPINC . '/rewrite-functions.php' );
+require_once( ABSPATH . WPINC . '/class-wp-rewrite.php' );

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