Changeset 16051 for trunk/wp-includes/class.wp-object-query.php

Timestamp:

10/28/2010 04:27:18 PM (14 years ago)

Author:

scribu

Message:

Move WP_Object_Query to it's own file. See #15032

File:

• trunk/wp-includes/class.wp-object-query.php (copied) (copied from trunk/wp-includes/classes.php) (2 diffs)

trunk/wp-includes/class.wp-object-query.php

@@ -10 +10 @@
  * @package WordPress
  */
-
-/**
- * WordPress environment setup class.
- *
- * @package WordPress
- * @since 2.0.0
- */
-class WP {
-    /**
-     * Public query variables.
-     *
-     * Long list of public query variables.
-     *
-     * @since 2.0.0
-     * @access public
-     * @var array
-     */
-    var $public_query_vars = array('m', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'debug', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'static', 'pagename', 'page_id', 'error', 'comments_popup', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'taxonomy', 'term', 'cpage', 'post_type');
-
-    /**
-     * Private query variables.
-     *
-     * Long list of private query variables.
-     *
-     * @since 2.0.0
-     * @var array
-     */
-    var $private_query_vars = array('offset', 'posts_per_page', 'posts_per_archive_page', 'showposts', 'nopaging', 'post_type', 'post_status', 'category__in', 'category__not_in', 'category__and', 'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and', 'tag_id', 'post_mime_type', 'perm', 'comments_per_page', 'post__in', 'post__not_in');
-
-    /**
-     * Extra query variables set by the user.
-     *
-     * @since 2.1.0
-     * @var array
-     */
-    var $extra_query_vars = array();
-
-    /**
-     * Query variables for setting up the WordPress Query Loop.
-     *
-     * @since 2.0.0
-     * @var array
-     */
-    var $query_vars;
-
-    /**
-     * String parsed to set the query variables.
-     *
-     * @since 2.0.0
-     * @var string
-     */
-    var $query_string;
-
-    /**
-     * Permalink or requested URI.
-     *
-     * @since 2.0.0
-     * @var string
-     */
-    var $request;
-
-    /**
-     * Rewrite rule the request matched.
-     *
-     * @since 2.0.0
-     * @var string
-     */
-    var $matched_rule;
-
-    /**
-     * Rewrite query the request matched.
-     *
-     * @since 2.0.0
-     * @var string
-     */
-    var $matched_query;
-
-    /**
-     * Whether already did the permalink.
-     *
-     * @since 2.0.0
-     * @var bool
-     */
-    var $did_permalink = false;
-
-    /**
-     * Add name to list of public query variables.
-     *
-     * @since 2.1.0
-     *
-     * @param string $qv Query variable name.
-     */
-    function add_query_var($qv) {
-        if ( !in_array($qv, $this->public_query_vars) )
-            $this->public_query_vars[] = $qv;
-    }
-
-    /**
-     * Set the value of a query variable.
-     *
-     * @since 2.3.0
-     *
-     * @param string $key Query variable name.
-     * @param mixed $value Query variable value.
-     */
-    function set_query_var($key, $value) {
-        $this->query_vars[$key] = $value;
-    }
-
-    /**
-     * Parse request to find correct WordPress query.
-     *
-     * Sets up the query variables based on the request. There are also many
-     * filters and actions that can be used to further manipulate the result.
-     *
-     * @since 2.0.0
-     *
-     * @param array|string $extra_query_vars Set the extra query variables.
-     */
-    function parse_request($extra_query_vars = '') {
-        global $wp_rewrite;
-
-        $this->query_vars = array();
-        $post_type_query_vars = array();
-
-        if ( is_array($extra_query_vars) )
-            $this->extra_query_vars = & $extra_query_vars;
-        else if (! empty($extra_query_vars))
-            parse_str($extra_query_vars, $this->extra_query_vars);
-
-        // Process PATH_INFO, REQUEST_URI, and 404 for permalinks.
-
-        // Fetch the rewrite rules.
-        $rewrite = $wp_rewrite->wp_rewrite_rules();
-
-        if ( ! empty($rewrite) ) {
-            // If we match a rewrite rule, this will be cleared.
-            $error = '404';
-            $this->did_permalink = true;
-
-            if ( isset($_SERVER['PATH_INFO']) )
-                $pathinfo = $_SERVER['PATH_INFO'];
-            else
-                $pathinfo = '';
-            $pathinfo_array = explode('?', $pathinfo);
-            $pathinfo = str_replace("%", "%25", $pathinfo_array[0]);
-            $req_uri = $_SERVER['REQUEST_URI'];
-            $req_uri_array = explode('?', $req_uri);
-            $req_uri = $req_uri_array[0];
-            $self = $_SERVER['PHP_SELF'];
-            $home_path = parse_url(home_url());
-            if ( isset($home_path['path']) )
-                $home_path = $home_path['path'];
-            else
-                $home_path = '';
-            $home_path = trim($home_path, '/');
-
-            // Trim path info from the end and the leading home path from the
-            // front.  For path info requests, this leaves us with the requesting
-            // filename, if any.  For 404 requests, this leaves us with the
-            // requested permalink.
-            $req_uri = str_replace($pathinfo, '', $req_uri);
-            $req_uri = trim($req_uri, '/');
-            $req_uri = preg_replace("|^$home_path|", '', $req_uri);
-            $req_uri = trim($req_uri, '/');
-            $pathinfo = trim($pathinfo, '/');
-            $pathinfo = preg_replace("|^$home_path|", '', $pathinfo);
-            $pathinfo = trim($pathinfo, '/');
-            $self = trim($self, '/');
-            $self = preg_replace("|^$home_path|", '', $self);
-            $self = trim($self, '/');
-
-            // The requested permalink is in $pathinfo for path info requests and
-            //  $req_uri for other requests.
-            if ( ! empty($pathinfo) && !preg_match('|^.*' . $wp_rewrite->index . '$|', $pathinfo) ) {
-                $request = $pathinfo;
-            } else {
-                // If the request uri is the index, blank it out so that we don't try to match it against a rule.
-                if ( $req_uri == $wp_rewrite->index )
-                    $req_uri = '';
-                $request = $req_uri;
-            }
-
-            $this->request = $request;
-
-            // Look for matches.
-            $request_match = $request;
-            foreach ( (array) $rewrite as $match => $query) {
-                // Don't try to match against AtomPub calls
-                if ( $req_uri == 'wp-app.php' )
-                    break;
-
-                // If the requesting file is the anchor of the match, prepend it
-                // to the path info.
-                if ( (! empty($req_uri)) && (strpos($match, $req_uri) === 0) && ($req_uri != $request) )
-                    $request_match = $req_uri . '/' . $request;
-
-                if ( preg_match("#^$match#", $request_match, $matches) ||
-                    preg_match("#^$match#", urldecode($request_match), $matches) ) {
-                    // Got a match.
-                    $this->matched_rule = $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));
-
-                    $this->matched_query = $query;
-
-                    // Parse the query.
-                    parse_str($query, $perma_query_vars);
-
-                    // If we're processing a 404 request, clear the error var
-                    // since we found something.
-                    if ( isset($_GET['error']) )
-                        unset($_GET['error']);
-
-                    if ( isset($error) )
-                        unset($error);
-
-                    break;
-                }
-            }
-
-            // If req_uri is empty or if it is a request for ourself, unset error.
-            if ( empty($request) || $req_uri == $self || strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false ) {
-                if ( isset($_GET['error']) )
-                    unset($_GET['error']);
-
-                if ( isset($error) )
-                    unset($error);
-
-                if ( isset($perma_query_vars) && strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false )
-                    unset($perma_query_vars);
-
-                $this->did_permalink = false;
-            }
-        }
-
-        $this->public_query_vars = apply_filters('query_vars', $this->public_query_vars);
-
-        foreach ( $GLOBALS['wp_post_types'] as $post_type => $t )
-            if ( $t->query_var )
-                $post_type_query_vars[$t->query_var] = $post_type;
-
-        foreach ( $this->public_query_vars as $wpvar ) {
-            if ( isset( $this->extra_query_vars[$wpvar] ) )
-                $this->query_vars[$wpvar] = $this->extra_query_vars[$wpvar];
-            elseif ( isset( $_POST[$wpvar] ) )
-                $this->query_vars[$wpvar] = $_POST[$wpvar];
-            elseif ( isset( $_GET[$wpvar] ) )
-                $this->query_vars[$wpvar] = $_GET[$wpvar];
-            elseif ( isset( $perma_query_vars[$wpvar] ) )
-                $this->query_vars[$wpvar] = $perma_query_vars[$wpvar];
-
-            if ( !empty( $this->query_vars[$wpvar] ) ) {
-                if ( ! is_array( $this->query_vars[$wpvar] ) ) {
-                    $this->query_vars[$wpvar] = (string) $this->query_vars[$wpvar];
-                } else {
-                    foreach ( $this->query_vars[$wpvar] as $vkey => $v ) {
-                        if ( !is_object( $v ) ) {
-                            $this->query_vars[$wpvar][$vkey] = (string) $v;
-                        }
-                    }
-                }
-
-                if ( isset($post_type_query_vars[$wpvar] ) ) {
-                    $this->query_vars['post_type'] = $post_type_query_vars[$wpvar];
-                    $this->query_vars['name'] = $this->query_vars[$wpvar];
-                }
-            }
-        }
-
-        // Limit publicly queried post_types to those that are publicly_queryable
-        if ( isset( $this->query_vars['post_type']) ) {
-            $queryable_post_types = get_post_types( array('publicly_queryable' => true) );
-            if ( ! is_array( $this->query_vars['post_type'] ) ) {
-                if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types ) )
-                    unset( $this->query_vars['post_type'] );
-            } else {
-                $this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );
-            }
-        }
-
-        foreach ( (array) $this->private_query_vars as $var) {
-            if ( isset($this->extra_query_vars[$var]) )
-                $this->query_vars[$var] = $this->extra_query_vars[$var];
-        }
-
-        if ( isset($error) )
-            $this->query_vars['error'] = $error;
-
-        $this->query_vars = apply_filters('request', $this->query_vars);
-
-        do_action_ref_array('parse_request', array(&$this));
-    }
-
-    /**
-     * Send additional HTTP headers for caching, content type, etc.
-     *
-     * Sets the X-Pingback header, 404 status (if 404), Content-type. If showing
-     * a feed, it will also send last-modified, etag, and 304 status if needed.
-     *
-     * @since 2.0.0
-     */
-    function send_headers() {
-        $headers = array('X-Pingback' => get_bloginfo('pingback_url'));
-        $status = null;
-        $exit_required = false;
-
-        if ( is_user_logged_in() )
-            $headers = array_merge($headers, wp_get_nocache_headers());
-        if ( !empty($this->query_vars['error']) && '404' == $this->query_vars['error'] ) {
-            $status = 404;
-            if ( !is_user_logged_in() )
-                $headers = array_merge($headers, wp_get_nocache_headers());
-            $headers['Content-Type'] = get_option('html_type') . '; charset=' . get_option('blog_charset');
-        } else if ( empty($this->query_vars['feed']) ) {
-            $headers['Content-Type'] = get_option('html_type') . '; charset=' . get_option('blog_charset');
-        } else {
-            // We're showing a feed, so WP is indeed the only thing that last changed
-            if ( !empty($this->query_vars['withcomments'])
-                || ( empty($this->query_vars['withoutcomments'])
-                    && ( !empty($this->query_vars['p'])
-                        || !empty($this->query_vars['name'])
-                        || !empty($this->query_vars['page_id'])
-                        || !empty($this->query_vars['pagename'])
-                        || !empty($this->query_vars['attachment'])
-                        || !empty($this->query_vars['attachment_id'])
-                    )
-                )
-            )
-                $wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastcommentmodified('GMT'), 0).' GMT';
-            else
-                $wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastpostmodified('GMT'), 0).' GMT';
-            $wp_etag = '"' . md5($wp_last_modified) . '"';
-            $headers['Last-Modified'] = $wp_last_modified;
-            $headers['ETag'] = $wp_etag;
-
-            // Support for Conditional GET
-            if (isset($_SERVER['HTTP_IF_NONE_MATCH']))
-                $client_etag = stripslashes(stripslashes($_SERVER['HTTP_IF_NONE_MATCH']));
-            else $client_etag = false;
-
-            $client_last_modified = empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? '' : trim($_SERVER['HTTP_IF_MODIFIED_SINCE']);
-            // If string is empty, return 0. If not, attempt to parse into a timestamp
-            $client_modified_timestamp = $client_last_modified ? strtotime($client_last_modified) : 0;
-
-            // Make a timestamp for our most recent modification...
-            $wp_modified_timestamp = strtotime($wp_last_modified);
-
-            if ( ($client_last_modified && $client_etag) ?
-                     (($client_modified_timestamp >= $wp_modified_timestamp) && ($client_etag == $wp_etag)) :
-                     (($client_modified_timestamp >= $wp_modified_timestamp) || ($client_etag == $wp_etag)) ) {
-                $status = 304;
-                $exit_required = true;
-            }
-        }
-
-        $headers = apply_filters('wp_headers', $headers, $this);
-
-        if ( ! empty( $status ) )
-            status_header( $status );
-        foreach( (array) $headers as $name => $field_value )
-            @header("{$name}: {$field_value}");
-
-        if ( $exit_required )
-            exit();
-
-        do_action_ref_array('send_headers', array(&$this));
-    }
-
-    /**
-     * Sets the query string property based off of the query variable property.
-     *
-     * The 'query_string' filter is deprecated, but still works. Plugins should
-     * use the 'request' filter instead.
-     *
-     * @since 2.0.0
-     */
-    function build_query_string() {
-        $this->query_string = '';
-        foreach ( (array) array_keys($this->query_vars) as $wpvar) {
-            if ( '' != $this->query_vars[$wpvar] ) {
-                $this->query_string .= (strlen($this->query_string) < 1) ? '' : '&';
-                if ( !is_scalar($this->query_vars[$wpvar]) ) // Discard non-scalars.
-                    continue;
-                $this->query_string .= $wpvar . '=' . rawurlencode($this->query_vars[$wpvar]);
-            }
-        }
-
-        // query_string filter deprecated.  Use request filter instead.
-        if ( has_filter('query_string') ) {  // Don't bother filtering and parsing if no plugins are hooked in.
-            $this->query_string = apply_filters('query_string', $this->query_string);
-            parse_str($this->query_string, $this->query_vars);
-        }
-    }
-
-    /**
-     * Set up the WordPress Globals.
-     *
-     * The query_vars property will be extracted to the GLOBALS. So care should
-     * be taken when naming global variables that might interfere with the
-     * WordPress environment.
-     *
-     * @global string $query_string Query string for the loop.
-     * @global int $more Only set, if single page or post.
-     * @global int $single If single page or post. Only set, if single page or post.
-     *
-     * @since 2.0.0
-     */
-    function register_globals() {
-        global $wp_query;
-        // Extract updated query vars back into global namespace.
-        foreach ( (array) $wp_query->query_vars as $key => $value) {
-            $GLOBALS[$key] = $value;
-        }
-
-        $GLOBALS['query_string'] = $this->query_string;
-        $GLOBALS['posts'] = & $wp_query->posts;
-        $GLOBALS['post'] = (isset($wp_query->post)) ? $wp_query->post : null;
-        $GLOBALS['request'] = $wp_query->request;
-
-        if ( is_single() || is_page() ) {
-            $GLOBALS['more'] = 1;
-            $GLOBALS['single'] = 1;
-        }
-    }
-
-    /**
-     * Set up the current user.
-     *
-     * @since 2.0.0
-     */
-    function init() {
-        wp_get_current_user();
-    }
-
-    /**
-     * Set up the Loop based on the query variables.
-     *
-     * @uses WP::$query_vars
-     * @since 2.0.0
-     */
-    function query_posts() {
-        global $wp_the_query;
-        $this->build_query_string();
-        $wp_the_query->query($this->query_vars);
-    }
-
-    /**
-     * Set the Headers for 404, if nothing is found for requested URL.
-     *
-     * Issue a 404 if a request doesn't match any posts and doesn't match
-     * any object (e.g. an existing-but-empty category, tag, author) and a 404 was not already
-     * issued, and if the request was not a search or the homepage.
-     *
-     * Otherwise, issue a 200.
-     *
-     * @since 2.0.0
-     */
-    function handle_404() {
-        global $wp_query;
-
-        if ( !is_admin() && ( 0 == count( $wp_query->posts ) ) && !is_404() && !is_robots() && !is_search() && !is_home() ) {
-            // Don't 404 for these queries if they matched an object.
-            if ( ( is_tag() || is_category() || is_tax() || is_author() ) && $wp_query->get_queried_object() && !is_paged() ) {
-                if ( !is_404() )
-                    status_header( 200 );
-                return;
-            }
-            $wp_query->set_404();
-            status_header( 404 );
-            nocache_headers();
-        } elseif ( !is_404() ) {
-            status_header( 200 );
-        }
-    }
-
-    /**
-     * Sets up all of the variables required by the WordPress environment.
-     *
-     * The action 'wp' has one parameter that references the WP object. It
-     * allows for accessing the properties and methods to further manipulate the
-     * object.
-     *
-     * @since 2.0.0
-     *
-     * @param string|array $query_args Passed to {@link parse_request()}
-     */
-    function main($query_args = '') {
-        $this->init();
-        $this->parse_request($query_args);
-        $this->send_headers();
-        $this->query_posts();
-        $this->handle_404();
-        $this->register_globals();
-        do_action_ref_array('wp', array(&$this));
-    }
-
-    /**
-     * PHP4 Constructor - Does nothing.
-     *
-     * Call main() method when ready to run setup.
-     *
-     * @since 2.0.0
-     *
-     * @return WP
-     */
-    function WP() {
-        // Empty.
-    }
-}
 
 /**
@@ -761 +247 @@
 }
 
-/**
- * WordPress Error class.
- *
- * Container for checking for WordPress errors and error messages. Return
- * WP_Error and use {@link is_wp_error()} to check if this class is returned.
- * Many core WordPress functions pass this class in the event of an error and
- * if not handled properly will result in code errors.
- *
- * @package WordPress
- * @since 2.1.0
- */
-class WP_Error {
-    /**
-     * Stores the list of errors.
-     *
-     * @since 2.1.0
-     * @var array
-     * @access private
-     */
-    var $errors = array();
-
-    /**
-     * Stores the list of data for error codes.
-     *
-     * @since 2.1.0
-     * @var array
-     * @access private
-     */
-    var $error_data = array();
-
-    /**
-     * PHP4 Constructor - Sets up error message.
-     *
-     * If code parameter is empty then nothing will be done. It is possible to
-     * add multiple messages to the same code, but with other methods in the
-     * class.
-     *
-     * All parameters are optional, but if the code parameter is set, then the
-     * data parameter is optional.
-     *
-     * @since 2.1.0
-     *
-     * @param string|int $code Error code
-     * @param string $message Error message
-     * @param mixed $data Optional. Error data.
-     * @return WP_Error
-     */
-    function WP_Error($code = '', $message = '', $data = '') {
-        if ( empty($code) )
-            return;
-
-        $this->errors[$code][] = $message;
-
-        if ( ! empty($data) )
-            $this->error_data[$code] = $data;
-    }
-
-    /**
-     * Retrieve all error codes.
-     *
-     * @since 2.1.0
-     * @access public
-     *
-     * @return array List of error codes, if avaiable.
-     */
-    function get_error_codes() {
-        if ( empty($this->errors) )
-            return array();
-
-        return array_keys($this->errors);
-    }
-
-    /**
-     * Retrieve first error code available.
-     *
-     * @since 2.1.0
-     * @access public
-     *
-     * @return string|int Empty string, if no error codes.
-     */
-    function get_error_code() {
-        $codes = $this->get_error_codes();
-
-        if ( empty($codes) )
-            return '';
-
-        return $codes[0];
-    }
-
-    /**
-     * Retrieve all error messages or error messages matching code.
-     *
-     * @since 2.1.0
-     *
-     * @param string|int $code Optional. Retrieve messages matching code, if exists.
-     * @return array Error strings on success, or empty array on failure (if using codee parameter).
-     */
-    function get_error_messages($code = '') {
-        // Return all messages if no code specified.
-        if ( empty($code) ) {
-            $all_messages = array();
-            foreach ( (array) $this->errors as $code => $messages )
-                $all_messages = array_merge($all_messages, $messages);
-
-            return $all_messages;
-        }
-
-        if ( isset($this->errors[$code]) )
-            return $this->errors[$code];
-        else
-            return array();
-    }
-
-    /**
-     * Get single error message.
-     *
-     * This will get the first message available for the code. If no code is
-     * given then the first code available will be used.
-     *
-     * @since 2.1.0
-     *
-     * @param string|int $code Optional. Error code to retrieve message.
-     * @return string
-     */
-    function get_error_message($code = '') {
-        if ( empty($code) )
-            $code = $this->get_error_code();
-        $messages = $this->get_error_messages($code);
-        if ( empty($messages) )
-            return '';
-        return $messages[0];
-    }
-
-    /**
-     * Retrieve error data for error code.
-     *
-     * @since 2.1.0
-     *
-     * @param string|int $code Optional. Error code.
-     * @return mixed Null, if no errors.
-     */
-    function get_error_data($code = '') {
-        if ( empty($code) )
-            $code = $this->get_error_code();
-
-        if ( isset($this->error_data[$code]) )
-            return $this->error_data[$code];
-        return null;
-    }
-
-    /**
-     * Append more error messages to list of error messages.
-     *
-     * @since 2.1.0
-     * @access public
-     *
-     * @param string|int $code Error code.
-     * @param string $message Error message.
-     * @param mixed $data Optional. Error data.
-     */
-    function add($code, $message, $data = '') {
-        $this->errors[$code][] = $message;
-        if ( ! empty($data) )
-            $this->error_data[$code] = $data;
-    }
-
-    /**
-     * Add data for error code.
-     *
-     * The error code can only contain one error data.
-     *
-     * @since 2.1.0
-     *
-     * @param mixed $data Error data.
-     * @param string|int $code Error code.
-     */
-    function add_data($data, $code = '') {
-        if ( empty($code) )
-            $code = $this->get_error_code();
-
-        $this->error_data[$code] = $data;
-    }
-}
-
-/**
- * Check whether variable is a WordPress Error.
- *
- * Looks at the object and if a WP_Error class. Does not check to see if the
- * parent is also WP_Error, so can't inherit WP_Error and still use this
- * function.
- *
- * @since 2.1.0
- *
- * @param mixed $thing Check if unknown variable is WordPress Error object.
- * @return bool True, if WP_Error. False, if not WP_Error.
- */
-function is_wp_error($thing) {
-    if ( is_object($thing) && is_a($thing, 'WP_Error') )
-        return true;
-    return false;
-}
-
-/**
- * A class for displaying various tree-like structures.
- *
- * Extend the Walker class to use it, see examples at the below. Child classes
- * do not need to implement all of the abstract methods in the class. The child
- * only needs to implement the methods that are needed. Also, the methods are
- * not strictly abstract in that the parameter definition needs to be followed.
- * The child classes can have additional parameters.
- *
- * @package WordPress
- * @since 2.1.0
- * @abstract
- */
-class Walker {
-    /**
-     * What the class handles.
-     *
-     * @since 2.1.0
-     * @var string
-     * @access public
-     */
-    var $tree_type;
-
-    /**
-     * DB fields to use.
-     *
-     * @since 2.1.0
-     * @var array
-     * @access protected
-     */
-    var $db_fields;
-
-    /**
-     * Max number of pages walked by the paged walker
-     *
-     * @since 2.7.0
-     * @var int
-     * @access protected
-     */
-    var $max_pages = 1;
-
-    /**
-     * Starts the list before the elements are added.
-     *
-     * Additional parameters are used in child classes. The args parameter holds
-     * additional values that may be used with the child class methods. This
-     * method is called at the start of the output list.
-     *
-     * @since 2.1.0
-     * @abstract
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     */
-    function start_lvl(&$output) {}
-
-    /**
-     * Ends the list of after the elements are added.
-     *
-     * Additional parameters are used in child classes. The args parameter holds
-     * additional values that may be used with the child class methods. This
-     * method finishes the list at the end of output of the elements.
-     *
-     * @since 2.1.0
-     * @abstract
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     */
-    function end_lvl(&$output)   {}
-
-    /**
-     * Start the element output.
-     *
-     * Additional parameters are used in child classes. The args parameter holds
-     * additional values that may be used with the child class methods. Includes
-     * the element output also.
-     *
-     * @since 2.1.0
-     * @abstract
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     */
-    function start_el(&$output)  {}
-
-    /**
-     * Ends the element output, if needed.
-     *
-     * Additional parameters are used in child classes. The args parameter holds
-     * additional values that may be used with the child class methods.
-     *
-     * @since 2.1.0
-     * @abstract
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     */
-    function end_el(&$output)    {}
-
-    /**
-     * Traverse elements to create list from elements.
-     *
-     * Display one element if the element doesn't have any children otherwise,
-     * display the element and its children. Will only traverse up to the max
-     * depth and no ignore elements under that depth. It is possible to set the
-     * max depth to include all depths, see walk() method.
-     *
-     * This method shouldn't be called directly, use the walk() method instead.
-     *
-     * @since 2.5.0
-     *
-     * @param object $element Data object
-     * @param array $children_elements List of elements to continue traversing.
-     * @param int $max_depth Max depth to traverse.
-     * @param int $depth Depth of current element.
-     * @param array $args
-     * @param string $output Passed by reference. Used to append additional content.
-     * @return null Null on failure with no changes to parameters.
-     */
-    function display_element( $element, &$children_elements, $max_depth, $depth=0, $args, &$output ) {
-
-        if ( !$element )
-            return;
-
-        $id_field = $this->db_fields['id'];
-
-        //display this element
-        if ( is_array( $args[0] ) )
-            $args[0]['has_children'] = ! empty( $children_elements[$element->$id_field] );
-        $cb_args = array_merge( array(&$output, $element, $depth), $args);
-        call_user_func_array(array(&$this, 'start_el'), $cb_args);
-
-        $id = $element->$id_field;
-
-        // descend only when the depth is right and there are childrens for this element
-        if ( ($max_depth == 0 || $max_depth > $depth+1 ) && isset( $children_elements[$id]) ) {
-
-            foreach( $children_elements[ $id ] as $child ){
-
-                if ( !isset($newlevel) ) {
-                    $newlevel = true;
-                    //start the child delimiter
-                    $cb_args = array_merge( array(&$output, $depth), $args);
-                    call_user_func_array(array(&$this, 'start_lvl'), $cb_args);
-                }
-                $this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output );
-            }
-            unset( $children_elements[ $id ] );
-        }
-
-        if ( isset($newlevel) && $newlevel ){
-            //end the child delimiter
-            $cb_args = array_merge( array(&$output, $depth), $args);
-            call_user_func_array(array(&$this, 'end_lvl'), $cb_args);
-        }
-
-        //end this element
-        $cb_args = array_merge( array(&$output, $element, $depth), $args);
-        call_user_func_array(array(&$this, 'end_el'), $cb_args);
-    }
-
-    /**
-     * Display array of elements hierarchically.
-     *
-     * It is a generic function which does not assume any existing order of
-     * elements. max_depth = -1 means flatly display every element. max_depth =
-     * 0 means display all levels. max_depth > 0  specifies the number of
-     * display levels.
-     *
-     * @since 2.1.0
-     *
-     * @param array $elements
-     * @param int $max_depth
-     * @return string
-     */
-    function walk( $elements, $max_depth) {
-
-        $args = array_slice(func_get_args(), 2);
-        $output = '';
-
-        if ($max_depth < -1) //invalid parameter
-            return $output;
-
-        if (empty($elements)) //nothing to walk
-            return $output;
-
-        $id_field = $this->db_fields['id'];
-        $parent_field = $this->db_fields['parent'];
-
-        // flat display
-        if ( -1 == $max_depth ) {
-            $empty_array = array();
-            foreach ( $elements as $e )
-                $this->display_element( $e, $empty_array, 1, 0, $args, $output );
-            return $output;
-        }
-
-        /*
-         * need to display in hierarchical order
-         * separate elements into two buckets: top level and children elements
-         * children_elements is two dimensional array, eg.
-         * children_elements[10][] contains all sub-elements whose parent is 10.
-         */
-        $top_level_elements = array();
-        $children_elements  = array();
-        foreach ( $elements as $e) {
-            if ( 0 == $e->$parent_field )
-                $top_level_elements[] = $e;
-            else
-                $children_elements[ $e->$parent_field ][] = $e;
-        }
-
-        /*
-         * when none of the elements is top level
-         * assume the first one must be root of the sub elements
-         */
-        if ( empty($top_level_elements) ) {
-
-            $first = array_slice( $elements, 0, 1 );
-            $root = $first[0];
-
-            $top_level_elements = array();
-            $children_elements  = array();
-            foreach ( $elements as $e) {
-                if ( $root->$parent_field == $e->$parent_field )
-                    $top_level_elements[] = $e;
-                else
-                    $children_elements[ $e->$parent_field ][] = $e;
-            }
-        }
-
-        foreach ( $top_level_elements as $e )
-            $this->display_element( $e, $children_elements, $max_depth, 0, $args, $output );
-
-        /*
-         * if we are displaying all levels, and remaining children_elements is not empty,
-         * then we got orphans, which should be displayed regardless
-         */
-        if ( ( $max_depth == 0 ) && count( $children_elements ) > 0 ) {
-            $empty_array = array();
-            foreach ( $children_elements as $orphans )
-                foreach( $orphans as $op )
-                    $this->display_element( $op, $empty_array, 1, 0, $args, $output );
-         }
-
-         return $output;
-    }
-
-    /**
-     * paged_walk() - produce a page of nested elements
-     *
-     * Given an array of hierarchical elements, the maximum depth, a specific page number,
-     * and number of elements per page, this function first determines all top level root elements
-     * belonging to that page, then lists them and all of their children in hierarchical order.
-     *
-     * @package WordPress
-     * @since 2.7
-     * @param int $max_depth = 0 means display all levels; $max_depth > 0 specifies the number of display levels.
-     * @param int $page_num the specific page number, beginning with 1.
-     * @return XHTML of the specified page of elements
-     */
-    function paged_walk( $elements, $max_depth, $page_num, $per_page ) {
-
-        /* sanity check */
-        if ( empty($elements) || $max_depth < -1 )
-            return '';
-
-        $args = array_slice( func_get_args(), 4 );
-        $output = '';
-
-        $id_field = $this->db_fields['id'];
-        $parent_field = $this->db_fields['parent'];
-
-        $count = -1;
-        if ( -1 == $max_depth )
-            $total_top = count( $elements );
-        if ( $page_num < 1 || $per_page < 0  ) {
-            // No paging
-            $paging = false;
-            $start = 0;
-            if ( -1 == $max_depth )
-                $end = $total_top;
-            $this->max_pages = 1;
-        } else {
-            $paging = true;
-            $start = ( (int)$page_num - 1 ) * (int)$per_page;
-            $end   = $start + $per_page;
-            if ( -1 == $max_depth )
-                $this->max_pages = ceil($total_top / $per_page);
-        }
-
-        // flat display
-        if ( -1 == $max_depth ) {
-            if ( !empty($args[0]['reverse_top_level']) ) {
-                $elements = array_reverse( $elements );
-                $oldstart = $start;
-                $start = $total_top - $end;
-                $end = $total_top - $oldstart;
-            }
-
-            $empty_array = array();
-            foreach ( $elements as $e ) {
-                $count++;
-                if ( $count < $start )
-                    continue;
-                if ( $count >= $end )
-                    break;
-                $this->display_element( $e, $empty_array, 1, 0, $args, $output );
-            }
-            return $output;
-        }
-
-        /*
-         * separate elements into two buckets: top level and children elements
-         * children_elements is two dimensional array, eg.
-         * children_elements[10][] contains all sub-elements whose parent is 10.
-         */
-        $top_level_elements = array();
-        $children_elements  = array();
-        foreach ( $elements as $e) {
-            if ( 0 == $e->$parent_field )
-                $top_level_elements[] = $e;
-            else
-                $children_elements[ $e->$parent_field ][] = $e;
-        }
-
-        $total_top = count( $top_level_elements );
-        if ( $paging )
-            $this->max_pages = ceil($total_top / $per_page);
-        else
-            $end = $total_top;
-
-        if ( !empty($args[0]['reverse_top_level']) ) {
-            $top_level_elements = array_reverse( $top_level_elements );
-            $oldstart = $start;
-            $start = $total_top - $end;
-            $end = $total_top - $oldstart;
-        }
-        if ( !empty($args[0]['reverse_children']) ) {
-            foreach ( $children_elements as $parent => $children )
-                $children_elements[$parent] = array_reverse( $children );
-        }
-
-        foreach ( $top_level_elements as $e ) {
-            $count++;
-
-            //for the last page, need to unset earlier children in order to keep track of orphans
-            if ( $end >= $total_top && $count < $start )
-                    $this->unset_children( $e, $children_elements );
-
-            if ( $count < $start )
-                continue;
-
-            if ( $count >= $end )
-                break;
-
-            $this->display_element( $e, $children_elements, $max_depth, 0, $args, $output );
-        }
-
-        if ( $end >= $total_top && count( $children_elements ) > 0 ) {
-            $empty_array = array();
-            foreach ( $children_elements as $orphans )
-                foreach( $orphans as $op )
-                    $this->display_element( $op, $empty_array, 1, 0, $args, $output );
-        }
-
-        return $output;
-    }
-
-    function get_number_of_root_elements( $elements ){
-
-        $num = 0;
-        $parent_field = $this->db_fields['parent'];
-
-        foreach ( $elements as $e) {
-            if ( 0 == $e->$parent_field )
-                $num++;
-        }
-        return $num;
-    }
-
-    // unset all the children for a given top level element
-    function unset_children( $e, &$children_elements ){
-
-        if ( !$e || !$children_elements )
-            return;
-
-        $id_field = $this->db_fields['id'];
-        $id = $e->$id_field;
-
-        if ( !empty($children_elements[$id]) && is_array($children_elements[$id]) )
-            foreach ( (array) $children_elements[$id] as $child )
-                $this->unset_children( $child, $children_elements );
-
-        if ( isset($children_elements[$id]) )
-            unset( $children_elements[$id] );
-
-    }
-}
-
-/**
- * Create HTML list of pages.
- *
- * @package WordPress
- * @since 2.1.0
- * @uses Walker
- */
-class Walker_Page extends Walker {
-    /**
-     * @see Walker::$tree_type
-     * @since 2.1.0
-     * @var string
-     */
-    var $tree_type = 'page';
-
-    /**
-     * @see Walker::$db_fields
-     * @since 2.1.0
-     * @todo Decouple this.
-     * @var array
-     */
-    var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID');
-
-    /**
-     * @see Walker::start_lvl()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param int $depth Depth of page. Used for padding.
-     */
-    function start_lvl(&$output, $depth) {
-        $indent = str_repeat("\t", $depth);
-        $output .= "\n$indent<ul class='children'>\n";
-    }
-
-    /**
-     * @see Walker::end_lvl()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param int $depth Depth of page. Used for padding.
-     */
-    function end_lvl(&$output, $depth) {
-        $indent = str_repeat("\t", $depth);
-        $output .= "$indent</ul>\n";
-    }
-
-    /**
-     * @see Walker::start_el()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param object $page Page data object.
-     * @param int $depth Depth of page. Used for padding.
-     * @param int $current_page Page ID.
-     * @param array $args
-     */
-    function start_el(&$output, $page, $depth, $args, $current_page) {
-        if ( $depth )
-            $indent = str_repeat("\t", $depth);
-        else
-            $indent = '';
-
-        extract($args, EXTR_SKIP);
-        $css_class = array('page_item', 'page-item-'.$page->ID);
-        if ( !empty($current_page) ) {
-            $_current_page = get_page( $current_page );
-            if ( isset($_current_page->ancestors) && in_array($page->ID, (array) $_current_page->ancestors) )
-                $css_class[] = 'current_page_ancestor';
-            if ( $page->ID == $current_page )
-                $css_class[] = 'current_page_item';
-            elseif ( $_current_page && $page->ID == $_current_page->post_parent )
-                $css_class[] = 'current_page_parent';
-        } elseif ( $page->ID == get_option('page_for_posts') ) {
-            $css_class[] = 'current_page_parent';
-        }
-
-        $css_class = implode(' ', apply_filters('page_css_class', $css_class, $page));
-
-        $output .= $indent . '<li class="' . $css_class . '"><a href="' . get_permalink($page->ID) . '" title="' . esc_attr( wp_strip_all_tags( apply_filters( 'the_title', $page->post_title, $page->ID ) ) ) . '">' . $link_before . apply_filters( 'the_title', $page->post_title, $page->ID ) . $link_after . '</a>';
-
-        if ( !empty($show_date) ) {
-            if ( 'modified' == $show_date )
-                $time = $page->post_modified;
-            else
-                $time = $page->post_date;
-
-            $output .= " " . mysql2date($date_format, $time);
-        }
-    }
-
-    /**
-     * @see Walker::end_el()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param object $page Page data object. Not used.
-     * @param int $depth Depth of page. Not Used.
-     */
-    function end_el(&$output, $page, $depth) {
-        $output .= "</li>\n";
-    }
-
-}
-
-/**
- * Create HTML dropdown list of pages.
- *
- * @package WordPress
- * @since 2.1.0
- * @uses Walker
- */
-class Walker_PageDropdown extends Walker {
-    /**
-     * @see Walker::$tree_type
-     * @since 2.1.0
-     * @var string
-     */
-    var $tree_type = 'page';
-
-    /**
-     * @see Walker::$db_fields
-     * @since 2.1.0
-     * @todo Decouple this
-     * @var array
-     */
-    var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID');
-
-    /**
-     * @see Walker::start_el()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param object $page Page data object.
-     * @param int $depth Depth of page in reference to parent pages. Used for padding.
-     * @param array $args Uses 'selected' argument for selected page to set selected HTML attribute for option element.
-     */
-    function start_el(&$output, $page, $depth, $args) {
-        $pad = str_repeat('&nbsp;', $depth * 3);
-
-        $output .= "\t<option class=\"level-$depth\" value=\"$page->ID\"";
-        if ( $page->ID == $args['selected'] )
-            $output .= ' selected="selected"';
-        $output .= '>';
-        $title = esc_html($page->post_title);
-        $output .= "$pad$title";
-        $output .= "</option>\n";
-    }
-}
-
-/**
- * Create HTML list of categories.
- *
- * @package WordPress
- * @since 2.1.0
- * @uses Walker
- */
-class Walker_Category extends Walker {
-    /**
-     * @see Walker::$tree_type
-     * @since 2.1.0
-     * @var string
-     */
-    var $tree_type = 'category';
-
-    /**
-     * @see Walker::$db_fields
-     * @since 2.1.0
-     * @todo Decouple this
-     * @var array
-     */
-    var $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
-
-    /**
-     * @see Walker::start_lvl()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param int $depth Depth of category. Used for tab indentation.
-     * @param array $args Will only append content if style argument value is 'list'.
-     */
-    function start_lvl(&$output, $depth, $args) {
-        if ( 'list' != $args['style'] )
-            return;
-
-        $indent = str_repeat("\t", $depth);
-        $output .= "$indent<ul class='children'>\n";
-    }
-
-    /**
-     * @see Walker::end_lvl()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param int $depth Depth of category. Used for tab indentation.
-     * @param array $args Will only append content if style argument value is 'list'.
-     */
-    function end_lvl(&$output, $depth, $args) {
-        if ( 'list' != $args['style'] )
-            return;
-
-        $indent = str_repeat("\t", $depth);
-        $output .= "$indent</ul>\n";
-    }
-
-    /**
-     * @see Walker::start_el()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param object $category Category data object.
-     * @param int $depth Depth of category in reference to parents.
-     * @param array $args
-     */
-    function start_el(&$output, $category, $depth, $args) {
-        extract($args);
-
-        $cat_name = esc_attr( $category->name );
-        $cat_name = apply_filters( 'list_cats', $cat_name, $category );
-        $link = '<a href="' . esc_attr( get_term_link($category) ) . '" ';
-        if ( $use_desc_for_title == 0 || empty($category->description) )
-            $link .= 'title="' . sprintf(__( 'View all posts filed under %s' ), $cat_name) . '"';
-        else
-            $link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"';
-        $link .= '>';
-        $link .= $cat_name . '</a>';
-
-        if ( !empty($feed_image) || !empty($feed) ) {
-            $link .= ' ';
-
-            if ( empty($feed_image) )
-                $link .= '(';
-
-            $link .= '<a href="' . get_term_feed_link( $category->term_id, $category->taxonomy, $feed_type ) . '"';
-
-            if ( empty($feed) ) {
-                $alt = ' alt="' . sprintf(__( 'Feed for all posts filed under %s' ), $cat_name ) . '"';
-            } else {
-                $title = ' title="' . $feed . '"';
-                $alt = ' alt="' . $feed . '"';
-                $name = $feed;
-                $link .= $title;
-            }
-
-            $link .= '>';
-
-            if ( empty($feed_image) )
-                $link .= $name;
-            else
-                $link .= "<img src='$feed_image'$alt$title" . ' />';
-
-            $link .= '</a>';
-
-            if ( empty($feed_image) )
-                $link .= ')';
-        }
-
-        if ( !empty($show_count) )
-            $link .= ' (' . intval($category->count) . ')';
-
-        if ( !empty($show_date) )
-            $link .= ' ' . gmdate('Y-m-d', $category->last_update_timestamp);
-
-        if ( 'list' == $args['style'] ) {
-            $output .= "\t<li";
-            $class = 'cat-item cat-item-' . $category->term_id;
-            if ( !empty($current_category) ) {
-                $_current_category = get_term( $current_category, $category->taxonomy );
-                if ( $category->term_id == $current_category )
-                    $class .=  ' current-cat';
-                elseif ( $category->term_id == $_current_category->parent )
-                    $class .=  ' current-cat-parent';
-            }
-            $output .=  ' class="' . $class . '"';
-            $output .= ">$link\n";
-        } else {
-            $output .= "\t$link<br />\n";
-        }
-    }
-
-    /**
-     * @see Walker::end_el()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param object $page Not used.
-     * @param int $depth Depth of category. Not used.
-     * @param array $args Only uses 'list' for whether should append to output.
-     */
-    function end_el(&$output, $page, $depth, $args) {
-        if ( 'list' != $args['style'] )
-            return;
-
-        $output .= "</li>\n";
-    }
-
-}
-
-/**
- * Create HTML dropdown list of Categories.
- *
- * @package WordPress
- * @since 2.1.0
- * @uses Walker
- */
-class Walker_CategoryDropdown extends Walker {
-    /**
-     * @see Walker::$tree_type
-     * @since 2.1.0
-     * @var string
-     */
-    var $tree_type = 'category';
-
-    /**
-     * @see Walker::$db_fields
-     * @since 2.1.0
-     * @todo Decouple this
-     * @var array
-     */
-    var $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
-
-    /**
-     * @see Walker::start_el()
-     * @since 2.1.0
-     *
-     * @param string $output Passed by reference. Used to append additional content.
-     * @param object $category Category data object.
-     * @param int $depth Depth of category. Used for padding.
-     * @param array $args Uses 'selected', 'show_count', and 'show_last_update' keys, if they exist.
-     */
-    function start_el(&$output, $category, $depth, $args) {
-        $pad = str_repeat('&nbsp;', $depth * 3);
-
-        $cat_name = apply_filters('list_cats', $category->name, $category);
-        $output .= "\t<option class=\"level-$depth\" value=\"".$category->term_id."\"";
-        if ( $category->term_id == $args['selected'] )
-            $output .= ' selected="selected"';
-        $output .= '>';
-        $output .= $pad.$cat_name;
-        if ( $args['show_count'] )
-            $output .= '&nbsp;&nbsp;('. $category->count .')';
-        if ( $args['show_last_update'] ) {
-            $format = 'Y-m-d';
-            $output .= '&nbsp;&nbsp;' . gmdate($format, $category->last_update_timestamp);
-        }
-        $output .= "</option>\n";
-    }
-}
-
-/**
- * Send XML response back to AJAX request.
- *
- * @package WordPress
- * @since 2.1.0
- */
-class WP_Ajax_Response {
-    /**
-     * Store XML responses to send.
-     *
-     * @since 2.1.0
-     * @var array
-     * @access private
-     */
-    var $responses = array();
-
-    /**
-     * PHP4 Constructor - Passes args to {@link WP_Ajax_Response::add()}.
-     *
-     * @since 2.1.0
-     * @see WP_Ajax_Response::add()
-     *
-     * @param string|array $args Optional. Will be passed to add() method.
-     * @return WP_Ajax_Response
-     */
-    function WP_Ajax_Response( $args = '' ) {
-        if ( !empty($args) )
-            $this->add($args);
-    }
-
-    /**
-     * Append to XML response based on given arguments.
-     *
-     * The arguments that can be passed in the $args parameter are below. It is
-     * also possible to pass a WP_Error object in either the 'id' or 'data'
-     * argument. The parameter isn't actually optional, content should be given
-     * in order to send the correct response.
-     *
-     * 'what' argument is a string that is the XMLRPC response type.
-     * 'action' argument is a boolean or string that acts like a nonce.
-     * 'id' argument can be WP_Error or an integer.
-     * 'old_id' argument is false by default or an integer of the previous ID.
-     * 'position' argument is an integer or a string with -1 = top, 1 = bottom,
-     * html ID = after, -html ID = before.
-     * 'data' argument is a string with the content or message.
-     * 'supplemental' argument is an array of strings that will be children of
-     * the supplemental element.
-     *
-     * @since 2.1.0
-     *
-     * @param string|array $args Override defaults.
-     * @return string XML response.
-     */
-    function add( $args = '' ) {
-        $defaults = array(
-            'what' => 'object', 'action' => false,
-            'id' => '0', 'old_id' => false,
-            'position' => 1,
-            'data' => '', 'supplemental' => array()
-        );
-
-        $r = wp_parse_args( $args, $defaults );
-        extract( $r, EXTR_SKIP );
-        $position = preg_replace( '/[^a-z0-9:_-]/i', '', $position );
-
-        if ( is_wp_error($id) ) {
-            $data = $id;
-            $id = 0;
-        }
-
-        $response = '';
-        if ( is_wp_error($data) ) {
-            foreach ( (array) $data->get_error_codes() as $code ) {
-                $response .= "<wp_error code='$code'><![CDATA[" . $data->get_error_message($code) . "]]></wp_error>";
-                if ( !$error_data = $data->get_error_data($code) )
-                    continue;
-                $class = '';
-                if ( is_object($error_data) ) {
-                    $class = ' class="' . get_class($error_data) . '"';
-                    $error_data = get_object_vars($error_data);
-                }
-
-                $response .= "<wp_error_data code='$code'$class>";
-
-                if ( is_scalar($error_data) ) {
-                    $response .= "<![CDATA[$error_data]]>";
-                } elseif ( is_array($error_data) ) {
-                    foreach ( $error_data as $k => $v )
-                        $response .= "<$k><![CDATA[$v]]></$k>";
-                }
-
-                $response .= "</wp_error_data>";
-            }
-        } else {
-            $response = "<response_data><![CDATA[$data]]></response_data>";
-        }
-
-        $s = '';
-        if ( is_array($supplemental) ) {
-            foreach ( $supplemental as $k => $v )
-                $s .= "<$k><![CDATA[$v]]></$k>";
-            $s = "<supplemental>$s</supplemental>";
-        }
-
-        if ( false === $action )
-            $action = $_POST['action'];
-
-        $x = '';
-        $x .= "<response action='{$action}_$id'>"; // The action attribute in the xml output is formatted like a nonce action
-        $x .=   "<$what id='$id' " . ( false === $old_id ? '' : "old_id='$old_id' " ) . "position='$position'>";
-        $x .=       $response;
-        $x .=       $s;
-        $x .=   "</$what>";
-        $x .= "</response>";
-
-        $this->responses[] = $x;
-        return $x;
-    }
-
-    /**
-     * Display XML formatted responses.
-     *
-     * Sets the content type header to text/xml.
-     *
-     * @since 2.1.0
-     */
-    function send() {
-        header('Content-Type: text/xml');
-        echo "<?xml version='1.0' standalone='yes'?><wp_ajax>";
-        foreach ( (array) $this->responses as $response )
-            echo $response;
-        echo '</wp_ajax>';
-        die();
-    }
-}
-
-/**
- * Helper class to remove the need to use eval to replace $matches[] in query strings.
- *
- * @since 2.9.0
- */
-class WP_MatchesMapRegex {
-    /**
-     * store for matches
-     *
-     * @access private
-     * @var array
-     */
-    var $_matches;
-
-    /**
-     * store for mapping result
-     *
-     * @access public
-     * @var string
-     */
-    var $output;
-
-    /**
-     * subject to perform mapping on (query string containing $matches[] references
-     *
-     * @access private
-     * @var string
-     */
-    var $_subject;
-
-    /**
-     * regexp pattern to match $matches[] references
-     *
-     * @var string
-     */
-    var $_pattern = '(\$matches\[[1-9]+[0-9]*\])'; // magic number
-
-    /**
-     * constructor
-     *
-     * @param string $subject subject if regex
-     * @param array  $matches data to use in map
-     * @return self
-     */
-    function WP_MatchesMapRegex($subject, $matches) {
-        $this->_subject = $subject;
-        $this->_matches = $matches;
-        $this->output = $this->_map();
-    }
-
-    /**
-     * Substitute substring matches in subject.
-     *
-     * static helper function to ease use
-     *
-     * @access public
-     * @param string $subject subject
-     * @param array  $matches data used for subsitution
-     * @return string
-     */
-    function apply($subject, $matches) {
-        $oSelf =& new WP_MatchesMapRegex($subject, $matches);
-        return $oSelf->output;
-    }
-
-    /**
-     * do the actual mapping
-     *
-     * @access private
-     * @return string
-     */
-    function _map() {
-        $callback = array(&$this, 'callback');
-        return preg_replace_callback($this->_pattern, $callback, $this->_subject);
-    }
-
-    /**
-     * preg_replace_callback hook
-     *
-     * @access public
-     * @param  array $matches preg_replace regexp matches
-     * @return string
-     */
-    function callback($matches) {
-        $index = intval(substr($matches[0], 9, -1));
-        return ( isset( $this->_matches[$index] ) ? urlencode($this->_matches[$index]) : '' );
-    }
-
-}
-
 ?>