Miscellany

<?php

class WP {
 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');

 var $private_query_vars = array('offset', 'posts_per_page', 'posts_per_archive_page', 'what_to_show', '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');
 var $extra_query_vars = array();

 var $query_vars;
 var $query_string;
 var $request;
 var $matched_rule;
 var $matched_query;
 var $did_permalink = false;

 function add_query_var($qv) {
  $this->public_query_vars[] = $qv;
 }

 function set_query_var($key, $value) {
  $this->query_vars[$key] = $value;
 }

 function parse_request($extra_query_vars = '') {
  global $wp_rewrite;

  $this->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'];
   $home_path = parse_url(get_option('home'));
   if ( isset($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, '', rawurldecode($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);
   $self = str_replace($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 = $request;
   foreach ($rewrite as $match => $query) {
    // If the requesting file is the anchor of the match, prepend it
    // to the path info.
    if ((! empty($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.
     eval("\$query = \"$query\";");
     $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);

  for ($i=0; $i<count($this->public_query_vars); $i += 1) {
   $wpvar = $this->public_query_vars[$i];
   if (isset($this->extra_query_vars[$wpvar]))
    $this->query_vars[$wpvar] = $this->extra_query_vars[$wpvar];
   elseif (isset($GLOBALS[$wpvar]))
    $this->query_vars[$wpvar] = $GLOBALS[$wpvar];
   elseif (!empty($_POST[$wpvar]))
    $this->query_vars[$wpvar] = $_POST[$wpvar];
   elseif (!empty($_GET[$wpvar]))
    $this->query_vars[$wpvar] = $_GET[$wpvar];
   elseif (!empty($perma_query_vars[$wpvar]))
    $this->query_vars[$wpvar] = $perma_query_vars[$wpvar];

   if ( !empty( $this->query_vars[$wpvar] ) )
    $this->query_vars[$wpvar] = (string) $this->query_vars[$wpvar];
  }

  foreach ($this->private_query_vars as $var) {
   if (isset($this->extra_query_vars[$var]))
    $this->query_vars[$var] = $this->extra_query_vars[$var];
   elseif (isset($GLOBALS[$var]) && '' != $GLOBALS[$var])
    $this->query_vars[$var] = $GLOBALS[$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));
 }

 function send_headers() {
  @header('X-Pingback: '. get_bloginfo('pingback_url'));
  if ( is_user_logged_in() )
   nocache_headers();
  if ( !empty($this->query_vars['error']) && '404' == $this->query_vars['error'] ) {
   status_header( 404 );
   if ( !is_user_logged_in() )
    nocache_headers();
   @header('Content-Type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset'));
  } else if ( empty($this->query_vars['feed']) ) {
   @header('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 ( $this->query_vars['withcomments']
    || ( !$this->query_vars['withoutcomments']
     && ( $this->query_vars['p']
      || $this->query_vars['name']
      || $this->query_vars['page_id']
      || $this->query_vars['pagename']
      || $this->query_vars['attachment']
      || $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) . '"';
   @header("Last-Modified: $wp_last_modified");
   @header("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 = 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_header( 304 );
    exit;
   }
  }

  do_action_ref_array('send_headers', array(&$this));
 }

 function build_query_string() {
  $this->query_string = '';
  foreach (array_keys($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.
  global $wp_filter;
  if ( isset($wp_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);
  }
 }

 function register_globals() {
  global $wp_query;
  // Extract updated query vars back into global namespace.
  foreach ($wp_query->query_vars as $key => $value) {
   $GLOBALS[$key] = $value;
  }

  $GLOBALS['query_string'] = & $this->query_string;
  $GLOBALS['posts'] = & $wp_query->posts;
  $GLOBALS['post'] = & $wp_query->post;
  $GLOBALS['request'] = & $wp_query->request;

  if ( is_single() || is_page() ) {
   $GLOBALS['more'] = 1;
   $GLOBALS['single'] = 1;
  }
 }

 function init() {
  wp_get_current_user();
 }

 function query_posts() {
  global $wp_the_query;
  $this->build_query_string();
  $wp_the_query->query($this->query_vars);
  }

 function handle_404() {
  global $wp_query;
  // Issue a 404 if a permalink request doesn't match any posts.  Don't
  // issue a 404 if one was already issued, if the request was a search,
  // or if the request was a regular query string request rather than a
  // permalink request.
  if ( (0 == count($wp_query->posts)) && !is_404() && !is_search() && ( $this->did_permalink || (!empty($_SERVER['QUERY_STRING']) && (false === strpos($_SERVER['REQUEST_URI'], '?'))) ) ) {
   $wp_query->set_404();
   status_header( 404 );
   nocache_headers();
  } elseif( is_404() != true ) {
   status_header( 200 );
  }
 }

 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));
 }

 function WP() {
  // Empty.
 }
}

class WP_Error {
 var $errors = array();
 var $error_data = array();

 function WP_Error($code = '', $message = '', $data = '') {
  if ( empty($code) )
   return;

  $this->errors[$code][] = $message;

  if ( ! empty($data) )
   $this->error_data[$code] = $data;
 }

 function get_error_codes() {
  if ( empty($this->errors) )
   return array();

  return array_keys($this->errors);
 }

 function get_error_code() {
  $codes = $this->get_error_codes();

  if ( empty($codes) )
   return '';

  return $codes[0];
 }

 function get_error_messages($code = '') {
  // Return all messages if no code specified.
  if ( empty($code) ) {
   $all_messages = array();
   foreach ( $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();
 }

 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];
 }

 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;
 }

 function add($code, $message, $data = '') {
  $this->errors[$code][] = $message;
  if ( ! empty($data) )
   $this->error_data[$code] = $data;
 }

 function add_data($data, $code = '') {
  if ( empty($code) )
   $code = $this->get_error_code();

  $this->error_data[$code] = $data;
 }
}

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 bottom

class Walker {
 var $tree_type;
 var $db_fields;

 //abstract callbacks
 function start_lvl($output) { return $output; }
 function end_lvl($output)   { return $output; }
 function start_el($output)  { return $output; }
 function end_el($output)    { return $output; }

 function walk($elements, $to_depth) {
  $args = array_slice(func_get_args(), 2); $parents = array(); $depth = 1; $previous_element = ''; $output = '';

  //padding at the end
  $last_element->post_parent = 0;
  $last_element->post_id = 0;
  $elements[] = $last_element;

  $id_field = $this->db_fields['id'];
  $parent_field = $this->db_fields['parent'];

  $flat = ($to_depth == -1) ? true : false;

  foreach ( $elements as $element ) {
   // If flat, start and end the element and skip the level checks.
   if ( $flat) {
    // Start the element.
    if ( isset($element->$id_field) && $element->$id_field != 0 ) {
     $cb_args = array_merge( array($output, $element, $depth - 1), $args);
     $output = call_user_func_array(array(&$this, 'start_el'), $cb_args);
    }

    // End the element.
    if ( isset($element->$id_field) && $element->$id_field != 0 ) {
     $cb_args = array_merge( array($output, $element, $depth - 1), $args);
     $output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
    }

    continue;
   }

   // Walk the tree.
   if ( !empty($previous_element) && ($element->$parent_field == $previous_element->$id_field) ) {
    // Previous element is my parent. Descend a level.
    array_unshift($parents, $previous_element);
    if ( !$to_depth || ($depth < $to_depth) ) { //only descend if we're below $to_depth
     $cb_args = array_merge( array($output, $depth), $args);
     $output = call_user_func_array(array(&$this, 'start_lvl'), $cb_args);
    } else if ( $to_depth && $depth == $to_depth  ) {  // If we've reached depth, end the previous element.
     $cb_args = array_merge( array($output, $previous_element, $depth), $args);
     $output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
    }
    $depth++; //always do this so when we start the element further down, we know where we are
   } else if ( $element->$parent_field == $previous_element->$parent_field) {
    // On the same level as previous element.
    if ( !$to_depth || ($depth <= $to_depth) ) {
     $cb_args = array_merge( array($output, $previous_element, $depth - 1), $args);
     $output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
    }
   } else if ( $depth > 1 ) {
    // Ascend one or more levels.
    if ( !$to_depth || ($depth <= $to_depth) ) {
     $cb_args = array_merge( array($output, $previous_element, $depth - 1), $args);
     $output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
    }

    while ( $parent = array_shift($parents) ) {
     $depth--;
     if ( !$to_depth || ($depth < $to_depth) ) {
      $cb_args = array_merge( array($output, $depth), $args);
      $output = call_user_func_array(array(&$this, 'end_lvl'), $cb_args);
      $cb_args = array_merge( array($output, $parent, $depth - 1), $args);
      $output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
     }
     if ( $element->$parent_field == $parents[0]->$id_field ) {
      break;
     }
    }
   } else if ( !empty($previous_element) ) {
    // Close off previous element.
    if ( !$to_depth || ($depth <= $to_depth) ) {
     $cb_args = array_merge( array($output, $previous_element, $depth - 1), $args);
     $output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
    }
   }

   // Start the element.
   if ( !$to_depth || ($depth <= $to_depth) ) {
    if ( $element->$id_field != 0 ) {
     $cb_args = array_merge( array($output, $element, $depth - 1), $args);
     $output = call_user_func_array(array(&$this, 'start_el'), $cb_args);
    }
   }

   $previous_element = $element;
  }

  return $output;
 }
}

class Walker_Page extends Walker {
 var $tree_type = 'page';
 var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID'); //TODO: decouple this

 function start_lvl($output, $depth) {
  $indent = str_repeat("\t", $depth);
  $output .= "\n$indent<ul>\n";
  return $output;
 }

 function end_lvl($output, $depth) {
  $indent = str_repeat("\t", $depth);
  $output .= "$indent</ul>\n";
  return $output;
 }

 function start_el($output, $page, $depth, $current_page, $args) {
  if ( $depth )
   $indent = str_repeat("\t", $depth);
  extract($args, EXTR_SKIP);
  $css_class = 'page_item page-item-'.$page->ID;
  $_current_page = get_page( $current_page );
  if ( $page->ID == $current_page )
   $css_class .= ' current_page_item ';
  elseif ( $_current_page && $page->ID == $_current_page->post_parent )
   $css_class .= ' current_page_parent';

  $output .= $indent . '<li class="' . $css_class . '"><a href="' . get_page_link($page->ID) . '" title="' . attribute_escape(apply_filters('the_title', $page->post_title)) . '">' . apply_filters('the_title', $page->post_title) . '</a>';

  if ( !empty($show_date) ) {
   if ( 'modified' == $show_date )
    $time = $page->post_modified;
   else
    $time = $page->post_date;

   $output .= " " . mysql2date($date_format, $time);
  }

  return $output;
 }

 function end_el($output, $page, $depth) {
  $output .= "</li>\n";

  return $output;
 }

}

class Walker_PageDropdown extends Walker {
 var $tree_type = 'page';
 var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID'); //TODO: decouple this

 function start_el($output, $page, $depth, $args) {
    $pad = str_repeat('&nbsp;', $depth * 3);

    $output .= "\t<option value=\"$page->ID\"";
    if ( $page->ID == $args['selected'] )
        $output .= ' selected="selected"';
    $output .= '>';
    $title = wp_specialchars($page->post_title);
    $output .= "$pad$title";
    $output .= "</option>\n";

    return $output;
 }
}

class Walker_Category extends Walker {
 var $tree_type = 'category';
 var $db_fields = array ('parent' => 'parent', 'id' => 'term_id'); //TODO: decouple this

 function start_lvl($output, $depth, $args) {
  if ( 'list' != $args['style'] )
   return $output;

  $indent = str_repeat("\t", $depth);
  $output .= "$indent<ul class='children'>\n";
  return $output;
 }

 function end_lvl($output, $depth, $args) {
  if ( 'list' != $args['style'] )
   return $output;

  $indent = str_repeat("\t", $depth);
  $output .= "$indent</ul>\n";
  return $output;
 }

 function start_el($output, $category, $depth, $args) {
  extract($args);

  $cat_name = attribute_escape( $category->name);
  $cat_name = apply_filters( 'list_cats', $cat_name, $category );
  $link = '<a href="' . get_category_link( $category->term_id ) . '" ';
  if ( $use_desc_for_title == 0 || empty($category->description) )
   $link .= 'title="' . sprintf(__( 'View all posts filed under %s' ), $cat_name) . '"';
  else
   $link .= 'title="' . attribute_escape( 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_category_rss_link( 0, $category->term_id, $category->slug ) . '"';

   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 ( isset($show_count) && $show_count )
   $link .= ' (' . intval($category->count) . ')';

  if ( isset($show_date) && $show_date ) {
   $link .= ' ' . gmdate('Y-m-d', $category->last_update_timestamp);
  }

  if ( $current_category )
   $_current_category = get_category( $current_category );

  if ( 'list' == $args['style'] ) {
   $output .= "\t<li";
   $class = 'cat-item cat-item-'.$category->term_id;
   if ( $current_category && ($category->term_id == $current_category) )
    $class .=  ' current-cat';
   elseif ( $_current_category && ($category->term_id == $_current_category->parent) )
    $class .=  ' current-cat-parent';
   $output .=  ' class="'.$class.'"';
   $output .= ">$link\n";
  } else {
   $output .= "\t$link<br />\n";
  }

  return $output;
 }

 function end_el($output, $page, $depth, $args) {
  if ( 'list' != $args['style'] )
   return $output;

  $output .= "</li>\n";
  return $output;
 }

}

class Walker_CategoryDropdown extends Walker {
 var $tree_type = 'category';
 var $db_fields = array ('parent' => 'parent', 'id' => 'term_id'); //TODO: decouple this

 function start_el($output, $category, $depth, $args) {
  $pad = str_repeat('&nbsp;', $depth * 3);

  $cat_name = apply_filters('list_cats', $category->name, $category);
  $output .= "\t<option value=\"".$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";

  return $output;
 }
}

class WP_Ajax_Response {
 var $responses = array();

 function WP_Ajax_Response( $args = '' ) {
  if ( !empty($args) )
   $this->add($args);
 }

 // a WP_Error object can be passed in 'id' or 'data'
 function add( $args = '' ) {
  $defaults = array(
   'what' => 'object', 'action' => false,
   'id' => '0', 'old_id' => false,
   'data' => '', 'supplemental' => array()
  );

  $r = wp_parse_args( $args, $defaults );
  extract( $r, EXTR_SKIP );

  if ( is_wp_error($id) ) {
   $data = $id;
   $id = 0;
  }

  $response = '';
  if ( is_wp_error($data) )
   foreach ( $data->get_error_codes() as $code )
    $response .= "<wp_error code='$code'><![CDATA[" . $data->get_error_message($code) . "]]></wp_error>";
  else
   $response = "<response_data><![CDATA[$data]]></response_data>";

  $s = '';
  if ( (array) $supplemental )
   foreach ( $supplemental as $k => $v )
    $s .= "<$k><![CDATA[$v]]></$k>";

  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'>" : '>' );
  $x .=  $response;
  $x .=  $s;
  $x .= "</$what>";
  $x .= "</response>";

  $this->responses[] = $x;
  return $x;
 }

 function send() {
  header('Content-Type: text/xml');
  echo "<?xml version='1.0' standalone='yes'?><wp_ajax>";
  foreach ( $this->responses as $response )
   echo $response;
  echo '</wp_ajax>';
  die();
 }
}

?>