site_iri: comparison web/wp-includes/post.php

equal deleted inserted replaced

-:53cff4b4a802
+:bde1974c263b
+<?php
+/**
+* Post functions and post utility function.
+*
+* @package WordPress
+* @subpackage Post
+* @since 1.5.0
+*/
+//
+// Post Type Registration
+//
+/**
+* Creates the initial post types when 'init' action is fired.
+*/
+function create_initial_post_types() {
+	register_post_type( 'post', array('exclude_from_search' => false) );
+	register_post_type( 'page', array('exclude_from_search' => false) );
+	register_post_type( 'attachment', array('exclude_from_search' => false) );
+	register_post_type( 'revision', array('exclude_from_search' => true) );
+}
+add_action( 'init', 'create_initial_post_types', 0 ); // highest priority
+/**
+* Retrieve attached file path based on attachment ID.
+*
+* You can optionally send it through the 'get_attached_file' filter, but by
+* default it will just return the file path unfiltered.
+*
+* The function works by getting the single post meta name, named
+* '_wp_attached_file' and returning it. This is a convenience function to
+* prevent looking up the meta name and provide a mechanism for sending the
+* attached filename through a filter.
+*
+* @since 2.0.0
+* @uses apply_filters() Calls 'get_attached_file' on file path and attachment ID.
+*
+* @param int $attachment_id Attachment ID.
+* @param bool $unfiltered Whether to apply filters or not.
+* @return string The file path to the attached file.
+*/
+function get_attached_file( $attachment_id, $unfiltered = false ) {
+	$file = get_post_meta( $attachment_id, '_wp_attached_file', true );
+	// If the file is relative, prepend upload dir
+	if ( 0 !== strpos($file, '/') && !preg_match('|^.:\\\|', $file) && ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) )
+		$file = $uploads['basedir'] . "/$file";
+	if ( $unfiltered )
+		return $file;
+	return apply_filters( 'get_attached_file', $file, $attachment_id );
+}
+/**
+* Update attachment file path based on attachment ID.
+*
+* Used to update the file path of the attachment, which uses post meta name
+* '_wp_attached_file' to store the path of the attachment.
+*
+* @since 2.1.0
+* @uses apply_filters() Calls 'update_attached_file' on file path and attachment ID.
+*
+* @param int $attachment_id Attachment ID
+* @param string $file File path for the attachment
+* @return bool False on failure, true on success.
+*/
+function update_attached_file( $attachment_id, $file ) {
+	if ( !get_post( $attachment_id ) )
+		return false;
+	$file = apply_filters( 'update_attached_file', $file, $attachment_id );
+	$file = _wp_relative_upload_path($file);
+	return update_post_meta( $attachment_id, '_wp_attached_file', $file );
+}
+/**
+* Return relative path to an uploaded file.
+*
+* The path is relative to the current upload dir.
+*
+* @since 2.9
+* @uses apply_filters() Calls '_wp_relative_upload_path' on file path.
+*
+* @param string $path Full path to the file
+* @return string relative path on success, unchanged path on failure.
+*/
+function _wp_relative_upload_path( $path ) {
+	$new_path = $path;
+	if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) {
+		if ( 0 === strpos($new_path, $uploads['basedir']) ) {
+				$new_path = str_replace($uploads['basedir'], '', $new_path);
+				$new_path = ltrim($new_path, '/');
+		}
+	}
+	return apply_filters( '_wp_relative_upload_path', $new_path, $path );
+}
+/**
+* Retrieve all children of the post parent ID.
+*
+* Normally, without any enhancements, the children would apply to pages. In the
+* context of the inner workings of WordPress, pages, posts, and attachments
+* share the same table, so therefore the functionality could apply to any one
+* of them. It is then noted that while this function does not work on posts, it
+* does not mean that it won't work on posts. It is recommended that you know
+* what context you wish to retrieve the children of.
+*
+* Attachments may also be made the child of a post, so if that is an accurate
+* statement (which needs to be verified), it would then be possible to get
+* all of the attachments for a post. Attachments have since changed since
+* version 2.5, so this is most likely unaccurate, but serves generally as an
+* example of what is possible.
+*
+* The arguments listed as defaults are for this function and also of the
+* {@link get_posts()} function. The arguments are combined with the
+* get_children defaults and are then passed to the {@link get_posts()}
+* function, which accepts additional arguments. You can replace the defaults in
+* this function, listed below and the additional arguments listed in the
+* {@link get_posts()} function.
+*
+* The 'post_parent' is the most important argument and important attention
+* needs to be paid to the $args parameter. If you pass either an object or an
+* integer (number), then just the 'post_parent' is grabbed and everything else
+* is lost. If you don't specify any arguments, then it is assumed that you are
+* in The Loop and the post parent will be grabbed for from the current post.
+*
+* The 'post_parent' argument is the ID to get the children. The 'numberposts'
+* is the amount of posts to retrieve that has a default of '-1', which is
+* used to get all of the posts. Giving a number higher than 0 will only
+* retrieve that amount of posts.
+*
+* The 'post_type' and 'post_status' arguments can be used to choose what
+* criteria of posts to retrieve. The 'post_type' can be anything, but WordPress
+* post types are 'post', 'pages', and 'attachments'. The 'post_status'
+* argument will accept any post status within the write administration panels.
+*
+* @see get_posts() Has additional arguments that can be replaced.
+* @internal Claims made in the long description might be inaccurate.
+*
+* @since 2.0.0
+*
+* @param mixed $args Optional. User defined arguments for replacing the defaults.
+* @param string $output Optional. Constant for return type, either OBJECT (default), ARRAY_A, ARRAY_N.
+* @return array|bool False on failure and the type will be determined by $output parameter.
+*/
+function &get_children($args = '', $output = OBJECT) {
+	$kids = array();
+	if ( empty( $args ) ) {
+		if ( isset( $GLOBALS['post'] ) ) {
+			$args = array('post_parent' => (int) $GLOBALS['post']->post_parent );
+		} else {
+			return $kids;
+		}
+	} elseif ( is_object( $args ) ) {
+		$args = array('post_parent' => (int) $args->post_parent );
+	} elseif ( is_numeric( $args ) ) {
+		$args = array('post_parent' => (int) $args);
+	}
+	$defaults = array(
+		'numberposts' => -1, 'post_type' => 'any',
+		'post_status' => 'any', 'post_parent' => 0,
+	);
+	$r = wp_parse_args( $args, $defaults );
+	$children = get_posts( $r );
+	if ( !$children )
+		return $kids;
+	update_post_cache($children);
+	foreach ( $children as $key => $child )
+		$kids[$child->ID] =& $children[$key];
+	if ( $output == OBJECT ) {
+		return $kids;
+	} elseif ( $output == ARRAY_A ) {
+		foreach ( (array) $kids as $kid )
+			$weeuns[$kid->ID] = get_object_vars($kids[$kid->ID]);
+		return $weeuns;
+	} elseif ( $output == ARRAY_N ) {
+		foreach ( (array) $kids as $kid )
+			$babes[$kid->ID] = array_values(get_object_vars($kids[$kid->ID]));
+		return $babes;
+	} else {
+		return $kids;
+	}
+}
+/**
+* Get extended entry info (<!--more-->).
+*
+* There should not be any space after the second dash and before the word
+* 'more'. There can be text or space(s) after the word 'more', but won't be
+* referenced.
+*
+* The returned array has 'main' and 'extended' keys. Main has the text before
+* the <code><!--more--></code>. The 'extended' key has the content after the
+* <code><!--more--></code> comment.
+*
+* @since 1.0.0
+*
+* @param string $post Post content.
+* @return array Post before ('main') and after ('extended').
+*/
+function get_extended($post) {
+	//Match the new style more links
+	if ( preg_match('/<!--more(.*?)?-->/', $post, $matches) ) {
+		list($main, $extended) = explode($matches[0], $post, 2);
+	} else {
+		$main = $post;
+		$extended = '';
+	}
+	// Strip leading and trailing whitespace
+	$main = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $main);
+	$extended = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $extended);
+	return array('main' => $main, 'extended' => $extended);
+}
+/**
+* Retrieves post data given a post ID or post object.
+*
+* See {@link sanitize_post()} for optional $filter values. Also, the parameter
+* $post, must be given as a variable, since it is passed by reference.
+*
+* @since 1.5.1
+* @uses $wpdb
+* @link http://codex.wordpress.org/Function_Reference/get_post
+*
+* @param int|object $post Post ID or post object.
+* @param string $output Optional, default is Object. Either OBJECT, ARRAY_A, or ARRAY_N.
+* @param string $filter Optional, default is raw.
+* @return mixed Post data
+*/
+function &get_post(&$post, $output = OBJECT, $filter = 'raw') {
+	global $wpdb;
+	$null = null;
+	if ( empty($post) ) {
+		if ( isset($GLOBALS['post']) )
+			$_post = & $GLOBALS['post'];
+		else
+			return $null;
+	} elseif ( is_object($post) && empty($post->filter) ) {
+		_get_post_ancestors($post);
+		$_post = sanitize_post($post, 'raw');
+		wp_cache_add($post->ID, $_post, 'posts');
+	} else {
+		if ( is_object($post) )
+			$post = $post->ID;
+		$post = (int) $post;
+		if ( ! $_post = wp_cache_get($post, 'posts') ) {
+			$_post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post));
+			if ( ! $_post )
+				return $null;
+			_get_post_ancestors($_post);
+			$_post = sanitize_post($_post, 'raw');
+			wp_cache_add($_post->ID, $_post, 'posts');
+		}
+	}
+	if ($filter != 'raw')
+		$_post = sanitize_post($_post, $filter);
+	if ( $output == OBJECT ) {
+		return $_post;
+	} elseif ( $output == ARRAY_A ) {
+		$__post = get_object_vars($_post);
+		return $__post;
+	} elseif ( $output == ARRAY_N ) {
+		$__post = array_values(get_object_vars($_post));
+		return $__post;
+	} else {
+		return $_post;
+	}
+}
+/**
+* Retrieve ancestors of a post.
+*
+* @since 2.5.0
+*
+* @param int|object $post Post ID or post object
+* @return array Ancestor IDs or empty array if none are found.
+*/
+function get_post_ancestors($post) {
+	$post = get_post($post);
+	if ( !empty($post->ancestors) )
+		return $post->ancestors;
+	return array();
+}
+/**
+* Retrieve data from a post field based on Post ID.
+*
+* Examples of the post field will be, 'post_type', 'post_status', 'content',
+* etc and based off of the post object property or key names.
+*
+* The context values are based off of the taxonomy filter functions and
+* supported values are found within those functions.
+*
+* @since 2.3.0
+* @uses sanitize_post_field() See for possible $context values.
+*
+* @param string $field Post field name
+* @param id $post Post ID
+* @param string $context Optional. How to filter the field. Default is display.
+* @return WP_Error|string Value in post field or WP_Error on failure
+*/
+function get_post_field( $field, $post, $context = 'display' ) {
+	$post = (int) $post;
+	$post = get_post( $post );
+	if ( is_wp_error($post) )
+		return $post;
+	if ( !is_object($post) )
+		return '';
+	if ( !isset($post->$field) )
+		return '';
+	return sanitize_post_field($field, $post->$field, $post->ID, $context);
+}
+/**
+* Retrieve the mime type of an attachment based on the ID.
+*
+* This function can be used with any post type, but it makes more sense with
+* attachments.
+*
+* @since 2.0.0
+*
+* @param int $ID Optional. Post ID.
+* @return bool|string False on failure or returns the mime type
+*/
+function get_post_mime_type($ID = '') {
+	$post = & get_post($ID);
+	if ( is_object($post) )
+		return $post->post_mime_type;
+	return false;
+}
+/**
+* Retrieve the post status based on the Post ID.
+*
+* If the post ID is of an attachment, then the parent post status will be given
+* instead.
+*
+* @since 2.0.0
+*
+* @param int $ID Post ID
+* @return string|bool Post status or false on failure.
+*/
+function get_post_status($ID = '') {
+	$post = get_post($ID);
+	if ( is_object($post) ) {
+		if ( ('attachment' == $post->post_type) && $post->post_parent && ($post->ID != $post->post_parent) )
+			return get_post_status($post->post_parent);
+		else
+			return $post->post_status;
+	}
+	return false;
+}
+/**
+* Retrieve all of the WordPress supported post statuses.
+*
+* Posts have a limited set of valid status values, this provides the
+* post_status values and descriptions.
+*
+* @since 2.5.0
+*
+* @return array List of post statuses.
+*/
+function get_post_statuses( ) {
+	$status = array(
+		'draft'			=> __('Draft'),
+		'pending'		=> __('Pending Review'),
+		'private'		=> __('Private'),
+		'publish'		=> __('Published')
+	);
+	return $status;
+}
+/**
+* Retrieve all of the WordPress support page statuses.
+*
+* Pages have a limited set of valid status values, this provides the
+* post_status values and descriptions.
+*
+* @since 2.5.0
+*
+* @return array List of page statuses.
+*/
+function get_page_statuses( ) {
+	$status = array(
+		'draft'			=> __('Draft'),
+		'private'		=> __('Private'),
+		'publish'		=> __('Published')
+	);
+	return $status;
+}
+/**
+* Retrieve the post type of the current post or of a given post.
+*
+* @since 2.1.0
+*
+* @uses $wpdb
+* @uses $posts The Loop post global
+*
+* @param mixed $post Optional. Post object or post ID.
+* @return bool|string post type or false on failure.
+*/
+function get_post_type($post = false) {
+	global $posts;
+	if ( false === $post )
+		$post = $posts[0];
+	elseif ( (int) $post )
+		$post = get_post($post, OBJECT);
+	if ( is_object($post) )
+		return $post->post_type;
+	return false;
+}
+/**
+* Get a list of all registered post type objects.
+*
+* @package WordPress
+* @subpackage Post
+* @since 2.9.0
+* @uses $wp_post_types
+* @see register_post_type
+* @see get_post_types
+*
+* @param array|string $args An array of key => value arguments to match against the post types.
+*  Only post types having attributes that match all arguments are returned.
+* @param string $output The type of output to return, either post type 'names' or 'objects'. 'names' is the default.
+* @return array A list of post type names or objects
+*/
+function get_post_types( $args = array(), $output = 'names' ) {
+	global $wp_post_types;
+	$do_names = false;
+	if ( 'names' == $output )
+		$do_names = true;
+	$post_types = array();
+	foreach ( (array) $wp_post_types as $post_type ) {
+		if ( empty($args) ) {
+			if ( $do_names )
+				$post_types[] = $post_type->name;
+			else
+				$post_types[] = $post_type;
+		} elseif ( array_intersect_assoc((array) $post_type, $args) ) {
+			if ( $do_names )
+				$post_types[] = $post_type->name;
+			else
+				$post_types[] = $post_type;
+		}
+	}
+	return $post_types;
+}
+/**
+* Register a post type. Do not use before init.
+*
+* A simple function for creating or modifying a post type based on the
+* parameters given. The function will accept an array (second optional
+* parameter), along with a string for the post type name.
+*
+*
+* Optional $args contents:
+*
+* exclude_from_search - Whether to exclude posts with this post type from search results. Defaults to true.
+*
+* @package WordPress
+* @subpackage Post
+* @since 2.9.0
+* @uses $wp_post_types Inserts new post type object into the list
+*
+* @param string $post_type Name of the post type.
+* @param array|string $args See above description.
+*/
+function register_post_type($post_type, $args = array()) {
+	global $wp_post_types;
+	if (!is_array($wp_post_types))
+		$wp_post_types = array();
+	$defaults = array('exclude_from_search' => true);
+	$args = wp_parse_args($args, $defaults);
+	$post_type = sanitize_user($post_type, true);
+	$args['name'] = $post_type;
+	$wp_post_types[$post_type] = (object) $args;
+}
+/**
+* Updates the post type for the post ID.
+*
+* The page or post cache will be cleaned for the post ID.
+*
+* @since 2.5.0
+*
+* @uses $wpdb
+*
+* @param int $post_id Post ID to change post type. Not actually optional.
+* @param string $post_type Optional, default is post. Supported values are 'post' or 'page' to
+*  name a few.
+* @return int Amount of rows changed. Should be 1 for success and 0 for failure.
+*/
+function set_post_type( $post_id = 0, $post_type = 'post' ) {
+	global $wpdb;
+	$post_type = sanitize_post_field('post_type', $post_type, $post_id, 'db');
+	$return = $wpdb->update($wpdb->posts, array('post_type' => $post_type), array('ID' => $post_id) );
+	if ( 'page' == $post_type )
+		clean_page_cache($post_id);
+	else
+		clean_post_cache($post_id);
+	return $return;
+}
+/**
+* Retrieve list of latest posts or posts matching criteria.
+*
+* The defaults are as follows:
+*     'numberposts' - Default is 5. Total number of posts to retrieve.
+*     'offset' - Default is 0. See {@link WP_Query::query()} for more.
+*     'category' - What category to pull the posts from.
+*     'orderby' - Default is 'post_date'. How to order the posts.
+*     'order' - Default is 'DESC'. The order to retrieve the posts.
+*     'include' - See {@link WP_Query::query()} for more.
+*     'exclude' - See {@link WP_Query::query()} for more.
+*     'meta_key' - See {@link WP_Query::query()} for more.
+*     'meta_value' - See {@link WP_Query::query()} for more.
+*     'post_type' - Default is 'post'. Can be 'page', or 'attachment' to name a few.
+*     'post_parent' - The parent of the post or post type.
+*     'post_status' - Default is 'published'. Post status to retrieve.
+*
+* @since 1.2.0
+* @uses $wpdb
+* @uses WP_Query::query() See for more default arguments and information.
+* @link http://codex.wordpress.org/Template_Tags/get_posts
+*
+* @param array $args Optional. Overrides defaults.
+* @return array List of posts.
+*/
+function get_posts($args = null) {
+	$defaults = array(
+		'numberposts' => 5, 'offset' => 0,
+		'category' => 0, 'orderby' => 'post_date',
+		'order' => 'DESC', 'include' => '',
+		'exclude' => '', 'meta_key' => '',
+		'meta_value' =>'', 'post_type' => 'post',
+		'suppress_filters' => true
+	);
+	$r = wp_parse_args( $args, $defaults );
+	if ( empty( $r['post_status'] ) )
+		$r['post_status'] = ( 'attachment' == $r['post_type'] ) ? 'inherit' : 'publish';
+	if ( ! empty($r['numberposts']) )
+		$r['posts_per_page'] = $r['numberposts'];
+	if ( ! empty($r['category']) )
+		$r['cat'] = $r['category'];
+	if ( ! empty($r['include']) ) {
+		$incposts = preg_split('/[\s,]+/',$r['include']);
+		$r['posts_per_page'] = count($incposts);  // only the number of posts included
+		$r['post__in'] = $incposts;
+	} elseif ( ! empty($r['exclude']) )
+		$r['post__not_in'] = preg_split('/[\s,]+/',$r['exclude']);
+	$r['caller_get_posts'] = true;
+	$get_posts = new WP_Query;
+	return $get_posts->query($r);
+}
+//
+// Post meta functions
+//
+/**
+* Add meta data field to a post.
+*
+* Post meta data is called "Custom Fields" on the Administration Panels.
+*
+* @since 1.5.0
+* @uses $wpdb
+* @link http://codex.wordpress.org/Function_Reference/add_post_meta
+*
+* @param int $post_id Post ID.
+* @param string $key Metadata name.
+* @param mixed $value Metadata value.
+* @param bool $unique Optional, default is false. Whether the same key should not be added.
+* @return bool False for failure. True for success.
+*/
+function add_post_meta($post_id, $meta_key, $meta_value, $unique = false) {
+	// make sure meta is added to the post, not a revision
+	if ( $the_post = wp_is_post_revision($post_id) )
+		$post_id = $the_post;
+	return add_metadata('post', $post_id, $meta_key, $meta_value, $unique);
+}
+/**
+* Remove metadata matching criteria from a post.
+*
+* You can match based on the key, or key and value. Removing based on key and
+* value, will keep from removing duplicate metadata with the same key. It also
+* allows removing all metadata matching key, if needed.
+*
+* @since 1.5.0
+* @uses $wpdb
+* @link http://codex.wordpress.org/Function_Reference/delete_post_meta
+*
+* @param int $post_id post ID
+* @param string $meta_key Metadata name.
+* @param mixed $meta_value Optional. Metadata value.
+* @return bool False for failure. True for success.
+*/
+function delete_post_meta($post_id, $meta_key, $meta_value = '') {
+	// make sure meta is added to the post, not a revision
+	if ( $the_post = wp_is_post_revision($post_id) )
+		$post_id = $the_post;
+	return delete_metadata('post', $post_id, $meta_key, $meta_value);
+}
+/**
+* Retrieve post meta field for a post.
+*
+* @since 1.5.0
+* @uses $wpdb
+* @link http://codex.wordpress.org/Function_Reference/get_post_meta
+*
+* @param int $post_id Post ID.
+* @param string $key The meta key to retrieve.
+* @param bool $single Whether to return a single value.
+* @return mixed Will be an array if $single is false. Will be value of meta data field if $single
+*  is true.
+*/
+function get_post_meta($post_id, $key, $single = false) {
+	return get_metadata('post', $post_id, $key, $single);
+}
+/**
+* Update post meta field based on post ID.
+*
+* Use the $prev_value parameter to differentiate between meta fields with the
+* same key and post ID.
+*
+* If the meta field for the post does not exist, it will be added.
+*
+* @since 1.5
+* @uses $wpdb
+* @link http://codex.wordpress.org/Function_Reference/update_post_meta
+*
+* @param int $post_id Post ID.
+* @param string $key Metadata key.
+* @param mixed $value Metadata value.
+* @param mixed $prev_value Optional. Previous value to check before removing.
+* @return bool False on failure, true if success.
+*/
+function update_post_meta($post_id, $meta_key, $meta_value, $prev_value = '') {
+	// make sure meta is added to the post, not a revision
+	if ( $the_post = wp_is_post_revision($post_id) )
+		$post_id = $the_post;
+	return update_metadata('post', $post_id, $meta_key, $meta_value, $prev_value);
+}
+/**
+* Delete everything from post meta matching meta key.
+*
+* @since 2.3.0
+* @uses $wpdb
+*
+* @param string $post_meta_key Key to search for when deleting.
+* @return bool Whether the post meta key was deleted from the database
+*/
+function delete_post_meta_by_key($post_meta_key) {
+	if ( !$post_meta_key )
+		return false;
+	global $wpdb;
+	$post_ids = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key));
+	if ( $post_ids ) {
+		$postmetaids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key ) );
+		$in = implode( ',', array_fill(1, count($postmetaids), '%d'));
+		do_action( 'delete_postmeta', $postmetaids );
+		$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id IN($in)", $postmetaids ));
+		do_action( 'deleted_postmeta', $postmetaids );
+		foreach ( $post_ids as $post_id )
+			wp_cache_delete($post_id, 'post_meta');
+		return true;
+	}
+	return false;
+}
+/**
+* Retrieve post meta fields, based on post ID.
+*
+* The post meta fields are retrieved from the cache, so the function is
+* optimized to be called more than once. It also applies to the functions, that
+* use this function.
+*
+* @since 1.2.0
+* @link http://codex.wordpress.org/Function_Reference/get_post_custom
+*
+* @uses $id Current Loop Post ID
+*
+* @param int $post_id post ID
+* @return array
+*/
+function get_post_custom($post_id = 0) {
+	global $id;
+	if ( !$post_id )
+		$post_id = (int) $id;
+	$post_id = (int) $post_id;
+	if ( ! wp_cache_get($post_id, 'post_meta') )
+		update_postmeta_cache($post_id);
+	return wp_cache_get($post_id, 'post_meta');
+}
+/**
+* Retrieve meta field names for a post.
+*
+* If there are no meta fields, then nothing (null) will be returned.
+*
+* @since 1.2.0
+* @link http://codex.wordpress.org/Function_Reference/get_post_custom_keys
+*
+* @param int $post_id post ID
+* @return array|null Either array of the keys, or null if keys could not be retrieved.
+*/
+function get_post_custom_keys( $post_id = 0 ) {
+	$custom = get_post_custom( $post_id );
+	if ( !is_array($custom) )
+		return;
+	if ( $keys = array_keys($custom) )
+		return $keys;
+}
+/**
+* Retrieve values for a custom post field.
+*
+* The parameters must not be considered optional. All of the post meta fields
+* will be retrieved and only the meta field key values returned.
+*
+* @since 1.2.0
+* @link http://codex.wordpress.org/Function_Reference/get_post_custom_values
+*
+* @param string $key Meta field key.
+* @param int $post_id Post ID
+* @return array Meta field values.
+*/
+function get_post_custom_values( $key = '', $post_id = 0 ) {
+	if ( !$key )
+		return null;
+	$custom = get_post_custom($post_id);
+	return isset($custom[$key]) ? $custom[$key] : null;
+}
+/**
+* Check if post is sticky.
+*
+* Sticky posts should remain at the top of The Loop. If the post ID is not
+* given, then The Loop ID for the current post will be used.
+*
+* @since 2.7.0
+*
+* @param int $post_id Optional. Post ID.
+* @return bool Whether post is sticky (true) or not sticky (false).
+*/
+function is_sticky($post_id = null) {
+	global $id;
+	$post_id = absint($post_id);
+	if ( !$post_id )
+		$post_id = absint($id);
+	$stickies = get_option('sticky_posts');
+	if ( !is_array($stickies) )
+		return false;
+	if ( in_array($post_id, $stickies) )
+		return true;
+	return false;
+}
+/**
+* Sanitize every post field.
+*
+* If the context is 'raw', then the post object or array will get minimal santization of the int fields.
+*
+* @since 2.3.0
+* @uses sanitize_post_field() Used to sanitize the fields.
+*
+* @param object|array $post The Post Object or Array
+* @param string $context Optional, default is 'display'. How to sanitize post fields.
+* @return object|array The now sanitized Post Object or Array (will be the same type as $post)
+*/
+function sanitize_post($post, $context = 'display') {
+	if ( is_object($post) ) {
+		// Check if post already filtered for this context
+		if ( isset($post->filter) && $context == $post->filter )
+			return $post;
+		if ( !isset($post->ID) )
+			$post->ID = 0;
+		foreach ( array_keys(get_object_vars($post)) as $field )
+			$post->$field = sanitize_post_field($field, $post->$field, $post->ID, $context);
+		$post->filter = $context;
+	} else {
+		// Check if post already filtered for this context
+		if ( isset($post['filter']) && $context == $post['filter'] )
+			return $post;
+		if ( !isset($post['ID']) )
+			$post['ID'] = 0;
+		foreach ( array_keys($post) as $field )
+			$post[$field] = sanitize_post_field($field, $post[$field], $post['ID'], $context);
+		$post['filter'] = $context;
+	}
+	return $post;
+}
+/**
+* Sanitize post field based on context.
+*
+* Possible context values are:  'raw', 'edit', 'db', 'display', 'attribute' and 'js'. The
+* 'display' context is used by default. 'attribute' and 'js' contexts are treated like 'display'
+* when calling filters.
+*
+* @since 2.3.0
+* @uses apply_filters() Calls 'edit_$field' and '${field_no_prefix}_edit_pre' passing $value and
+*  $post_id if $context == 'edit' and field name prefix == 'post_'.
+*
+* @uses apply_filters() Calls 'edit_post_$field' passing $value and $post_id if $context == 'db'.
+* @uses apply_filters() Calls 'pre_$field' passing $value if $context == 'db' and field name prefix == 'post_'.
+* @uses apply_filters() Calls '${field}_pre' passing $value if $context == 'db' and field name prefix != 'post_'.
+*
+* @uses apply_filters() Calls '$field' passing $value, $post_id and $context if $context == anything
+*  other than 'raw', 'edit' and 'db' and field name prefix == 'post_'.
+* @uses apply_filters() Calls 'post_$field' passing $value if $context == anything other than 'raw',
+*  'edit' and 'db' and field name prefix != 'post_'.
+*
+* @param string $field The Post Object field name.
+* @param mixed $value The Post Object value.
+* @param int $post_id Post ID.
+* @param string $context How to sanitize post fields. Looks for 'raw', 'edit', 'db', 'display',
+*               'attribute' and 'js'.
+* @return mixed Sanitized value.
+*/
+function sanitize_post_field($field, $value, $post_id, $context) {
+	$int_fields = array('ID', 'post_parent', 'menu_order');
+	if ( in_array($field, $int_fields) )
+		$value = (int) $value;
+	if ( 'raw' == $context )
+		return $value;
+	$prefixed = false;
+	if ( false !== strpos($field, 'post_') ) {
+		$prefixed = true;
+		$field_no_prefix = str_replace('post_', '', $field);
+	}
+	if ( 'edit' == $context ) {
+		$format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password');
+		if ( $prefixed ) {
+			$value = apply_filters("edit_$field", $value, $post_id);
+			// Old school
+			$value = apply_filters("${field_no_prefix}_edit_pre", $value, $post_id);
+		} else {
+			$value = apply_filters("edit_post_$field", $value, $post_id);
+		}
+		if ( in_array($field, $format_to_edit) ) {
+			if ( 'post_content' == $field )
+				$value = format_to_edit($value, user_can_richedit());
+			else
+				$value = format_to_edit($value);
+		} else {
+			$value = esc_attr($value);
+		}
+	} else if ( 'db' == $context ) {
+		if ( $prefixed ) {
+			$value = apply_filters("pre_$field", $value);
+			$value = apply_filters("${field_no_prefix}_save_pre", $value);
+		} else {
+			$value = apply_filters("pre_post_$field", $value);
+			$value = apply_filters("${field}_pre", $value);
+		}
+	} else {
+		// Use display filters by default.
+		if ( $prefixed )
+			$value = apply_filters($field, $value, $post_id, $context);
+		else
+			$value = apply_filters("post_$field", $value, $post_id, $context);
+	}
+	if ( 'attribute' == $context )
+		$value = esc_attr($value);
+	else if ( 'js' == $context )
+		$value = esc_js($value);
+	return $value;
+}
+/**
+* Make a post sticky.
+*
+* Sticky posts should be displayed at the top of the front page.
+*
+* @since 2.7.0
+*
+* @param int $post_id Post ID.
+*/
+function stick_post($post_id) {
+	$stickies = get_option('sticky_posts');
+	if ( !is_array($stickies) )
+		$stickies = array($post_id);
+	if ( ! in_array($post_id, $stickies) )
+		$stickies[] = $post_id;
+	update_option('sticky_posts', $stickies);
+}
+/**
+* Unstick a post.
+*
+* Sticky posts should be displayed at the top of the front page.
+*
+* @since 2.7.0
+*
+* @param int $post_id Post ID.
+*/
+function unstick_post($post_id) {
+	$stickies = get_option('sticky_posts');
+	if ( !is_array($stickies) )
+		return;
+	if ( ! in_array($post_id, $stickies) )
+		return;
+	$offset = array_search($post_id, $stickies);
+	if ( false === $offset )
+		return;
+	array_splice($stickies, $offset, 1);
+	update_option('sticky_posts', $stickies);
+}
+/**
+* Count number of posts of a post type and is user has permissions to view.
+*
+* This function provides an efficient method of finding the amount of post's
+* type a blog has. Another method is to count the amount of items in
+* get_posts(), but that method has a lot of overhead with doing so. Therefore,
+* when developing for 2.5+, use this function instead.
+*
+* The $perm parameter checks for 'readable' value and if the user can read
+* private posts, it will display that for the user that is signed in.
+*
+* @since 2.5.0
+* @link http://codex.wordpress.org/Template_Tags/wp_count_posts
+*
+* @param string $type Optional. Post type to retrieve count
+* @param string $perm Optional. 'readable' or empty.
+* @return object Number of posts for each status
+*/
+function wp_count_posts( $type = 'post', $perm = '' ) {
+	global $wpdb;
+	$user = wp_get_current_user();
+	$cache_key = $type;
+	$query = "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s";
+	if ( 'readable' == $perm && is_user_logged_in() ) {
+		if ( !current_user_can("read_private_{$type}s") ) {
+			$cache_key .= '_' . $perm . '_' . $user->ID;
+			$query .= " AND (post_status != 'private' OR ( post_author = '$user->ID' AND post_status = 'private' ))";
+		}
+	}
+	$query .= ' GROUP BY post_status';
+	$count = wp_cache_get($cache_key, 'counts');
+	if ( false !== $count )
+		return $count;
+	$count = $wpdb->get_results( $wpdb->prepare( $query, $type ), ARRAY_A );
+	$stats = array( 'publish' => 0, 'private' => 0, 'draft' => 0, 'pending' => 0, 'future' => 0, 'trash' => 0 );
+	foreach( (array) $count as $row_num => $row ) {
+		$stats[$row['post_status']] = $row['num_posts'];
+	}
+	$stats = (object) $stats;
+	wp_cache_set($cache_key, $stats, 'counts');
+	return $stats;
+}
+/**
+* Count number of attachments for the mime type(s).
+*
+* If you set the optional mime_type parameter, then an array will still be
+* returned, but will only have the item you are looking for. It does not give
+* you the number of attachments that are children of a post. You can get that
+* by counting the number of children that post has.
+*
+* @since 2.5.0
+*
+* @param string|array $mime_type Optional. Array or comma-separated list of MIME patterns.
+* @return array Number of posts for each mime type.
+*/
+function wp_count_attachments( $mime_type = '' ) {
+	global $wpdb;
+	$and = wp_post_mime_type_where( $mime_type );
+	$count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' $and GROUP BY post_mime_type", ARRAY_A );
+	$stats = array( );
+	foreach( (array) $count as $row ) {
+		$stats[$row['post_mime_type']] = $row['num_posts'];
+	}
+	$stats['trash'] = $wpdb->get_var( "SELECT COUNT( * ) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status = 'trash' $and");
+	return (object) $stats;
+}
+/**
+* Check a MIME-Type against a list.
+*
+* If the wildcard_mime_types parameter is a string, it must be comma separated
+* list. If the real_mime_types is a string, it is also comma separated to
+* create the list.
+*
+* @since 2.5.0
+*
+* @param string|array $wildcard_mime_types e.g. audio/mpeg or image (same as image/*) or
+*  flash (same as *flash*).
+* @param string|array $real_mime_types post_mime_type values
+* @return array array(wildcard=>array(real types))
+*/
+function wp_match_mime_types($wildcard_mime_types, $real_mime_types) {
+	$matches = array();
+	if ( is_string($wildcard_mime_types) )
+		$wildcard_mime_types = array_map('trim', explode(',', $wildcard_mime_types));
+	if ( is_string($real_mime_types) )
+		$real_mime_types = array_map('trim', explode(',', $real_mime_types));
+	$wild = '[-._a-z0-9]*';
+	foreach ( (array) $wildcard_mime_types as $type ) {
+		$type = str_replace('*', $wild, $type);
+		$patternses[1][$type] = "^$type$";
+		if ( false === strpos($type, '/') ) {
+			$patternses[2][$type] = "^$type/";
+			$patternses[3][$type] = $type;
+		}
+	}
+	asort($patternses);
+	foreach ( $patternses as $patterns )
+		foreach ( $patterns as $type => $pattern )
+			foreach ( (array) $real_mime_types as $real )
+				if ( preg_match("#$pattern#", $real) && ( empty($matches[$type]) || false === array_search($real, $matches[$type]) ) )
+					$matches[$type][] = $real;
+	return $matches;
+}
+/**
+* Convert MIME types into SQL.
+*
+* @since 2.5.0
+*
+* @param string|array $mime_types List of mime types or comma separated string of mime types.
+* @return string The SQL AND clause for mime searching.
+*/
+function wp_post_mime_type_where($post_mime_types) {
+	$where = '';
+	$wildcards = array('', '%', '%/%');
+	if ( is_string($post_mime_types) )
+		$post_mime_types = array_map('trim', explode(',', $post_mime_types));
+	foreach ( (array) $post_mime_types as $mime_type ) {
+		$mime_type = preg_replace('/\s/', '', $mime_type);
+		$slashpos = strpos($mime_type, '/');
+		if ( false !== $slashpos ) {
+			$mime_group = preg_replace('/[^-*.a-zA-Z0-9]/', '', substr($mime_type, 0, $slashpos));
+			$mime_subgroup = preg_replace('/[^-*.+a-zA-Z0-9]/', '', substr($mime_type, $slashpos + 1));
+			if ( empty($mime_subgroup) )
+				$mime_subgroup = '*';
+			else
+				$mime_subgroup = str_replace('/', '', $mime_subgroup);
+			$mime_pattern = "$mime_group/$mime_subgroup";
+		} else {
+			$mime_pattern = preg_replace('/[^-*.a-zA-Z0-9]/', '', $mime_type);
+			if ( false === strpos($mime_pattern, '*') )
+				$mime_pattern .= '/*';
+		}
+		$mime_pattern = preg_replace('/\*+/', '%', $mime_pattern);
+		if ( in_array( $mime_type, $wildcards ) )
+			return '';
+		if ( false !== strpos($mime_pattern, '%') )
+			$wheres[] = "post_mime_type LIKE '$mime_pattern'";
+		else
+			$wheres[] = "post_mime_type = '$mime_pattern'";
+	}
+	if ( !empty($wheres) )
+		$where = ' AND (' . join(' OR ', $wheres) . ') ';
+	return $where;
+}
+/**
+* Removes a post, attachment, or page.
+*
+* When the post and page goes, everything that is tied to it is deleted also.
+* This includes comments, post meta fields, and terms associated with the post.
+*
+* @since 1.0.0
+* @uses do_action() on 'delete_post' before deletion unless post type is 'attachment'.
+* @uses do_action() on 'deleted_post' after deletion unless post type is 'attachment'.
+* @uses wp_delete_attachment() if post type is 'attachment'.
+*
+* @param int $postid Post ID.
+* @param bool $force_delete Whether to bypass trash and force deletion
+* @return mixed False on failure
+*/
+function wp_delete_post( $postid = 0, $force_delete = false ) {
+	global $wpdb, $wp_rewrite;
+	if ( !$post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
+		return $post;
+	if ( !$force_delete && ( $post->post_type == 'post' || $post->post_type == 'page') && get_post_status( $postid ) != 'trash' && EMPTY_TRASH_DAYS > 0 )
+			return wp_trash_post($postid);
+	if ( $post->post_type == 'attachment' )
+		return wp_delete_attachment( $postid, $force_delete );
+	do_action('delete_post', $postid);
+	delete_post_meta($postid,'_wp_trash_meta_status');
+	delete_post_meta($postid,'_wp_trash_meta_time');
+	wp_delete_object_term_relationships($postid, get_object_taxonomies($post->post_type));
+	$parent_data = array( 'post_parent' => $post->post_parent );
+	$parent_where = array( 'post_parent' => $postid );
+	if ( 'page' == $post->post_type) {
+	 	// if the page is defined in option page_on_front or post_for_posts,
+		// adjust the corresponding options
+		if ( get_option('page_on_front') == $postid ) {
+			update_option('show_on_front', 'posts');
+			delete_option('page_on_front');
+		}
+		if ( get_option('page_for_posts') == $postid ) {
+			delete_option('page_for_posts');
+		}
+		// Point children of this page to its parent, also clean the cache of affected children
+		$children_query = $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE post_parent = %d AND post_type='page'", $postid);
+		$children = $wpdb->get_results($children_query);
+		$wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'page' ) );
+	} else {
+		unstick_post($postid);
+	}
+	// Do raw query.  wp_get_post_revisions() is filtered
+	$revision_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_parent = %d AND post_type = 'revision'", $postid ) );
+	// Use wp_delete_post (via wp_delete_post_revision) again.  Ensures any meta/misplaced data gets cleaned up.
+	foreach ( $revision_ids as $revision_id )
+		wp_delete_post_revision( $revision_id );
+	// Point all attachments to this post up one level
+	$wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'attachment' ) );
+	$comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
+	if ( ! empty($comment_ids) ) {
+		do_action( 'delete_comment', $comment_ids );
+		$in_comment_ids = "'" . implode("', '", $comment_ids) . "'";
+		$wpdb->query( "DELETE FROM $wpdb->comments WHERE comment_ID IN($in_comment_ids)" );
+		do_action( 'deleted_comment', $comment_ids );
+	}
+	$post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid ));
+	if ( !empty($post_meta_ids) ) {
+		do_action( 'delete_postmeta', $post_meta_ids );
+		$in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'";
+		$wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" );
+		do_action( 'deleted_postmeta', $post_meta_ids );
+	}
+	do_action( 'delete_post', $postid );
+	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid ));
+	do_action( 'deleted_post', $postid );
+	if ( 'page' == $post->post_type ) {
+		clean_page_cache($postid);
+		foreach ( (array) $children as $child )
+			clean_page_cache($child->ID);
+		$wp_rewrite->flush_rules(false);
+	} else {
+		clean_post_cache($postid);
+	}
+	wp_clear_scheduled_hook('publish_future_post', $postid);
+	do_action('deleted_post', $postid);
+	return $post;
+}
+/**
+* Moves a post or page to the Trash
+*
+* @since 2.9.0
+* @uses do_action() on 'trash_post' before trashing
+* @uses do_action() on 'trashed_post' after trashing
+*
+* @param int $postid Post ID.
+* @return mixed False on failure
+*/
+function wp_trash_post($post_id = 0) {
+	if ( EMPTY_TRASH_DAYS == 0 )
+		return wp_delete_post($post_id);
+	if ( !$post = wp_get_single_post($post_id, ARRAY_A) )
+		return $post;
+	if ( $post['post_status'] == 'trash' )
+		return false;
+	do_action('trash_post', $post_id);
+	add_post_meta($post_id,'_wp_trash_meta_status', $post['post_status']);
+	add_post_meta($post_id,'_wp_trash_meta_time', time());
+	$post['post_status'] = 'trash';
+	wp_insert_post($post);
+	wp_trash_post_comments($post_id);
+	do_action('trashed_post', $post_id);
+	return $post;
+}
+/**
+* Restores a post or page from the Trash
+*
+* @since 2.9.0
+* @uses do_action() on 'untrash_post' before undeletion
+* @uses do_action() on 'untrashed_post' after undeletion
+*
+* @param int $postid Post ID.
+* @return mixed False on failure
+*/
+function wp_untrash_post($post_id = 0) {
+	if ( !$post = wp_get_single_post($post_id, ARRAY_A) )
+		return $post;
+	if ( $post['post_status'] != 'trash' )
+		return false;
+	do_action('untrash_post', $post_id);
+	$post_status = get_post_meta($post_id, '_wp_trash_meta_status', true);
+	$post['post_status'] = $post_status;
+	delete_post_meta($post_id, '_wp_trash_meta_status');
+	delete_post_meta($post_id, '_wp_trash_meta_time');
+	wp_insert_post($post);
+	wp_untrash_post_comments($post_id);
+	do_action('untrashed_post', $post_id);
+	return $post;
+}
+/**
+* Moves comments for a post to the trash
+*
+* @since 2.9.0
+* @uses do_action() on 'trash_post_comments' before trashing
+* @uses do_action() on 'trashed_post_comments' after trashing
+*
+* @param int $post Post ID or object.
+* @return mixed False on failure
+*/
+function wp_trash_post_comments($post = null) {
+	global $wpdb;
+	$post = get_post($post);
+	if ( empty($post) )
+		return;
+	$post_id = $post->ID;
+	do_action('trash_post_comments', $post_id);
+	$comments = $wpdb->get_results( $wpdb->prepare("SELECT comment_ID, comment_approved FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id) );
+	if ( empty($comments) )
+		return;
+	// Cache current status for each comment
+	$statuses = array();
+	foreach ( $comments as $comment )
+		$statuses[$comment->comment_ID] = $comment->comment_approved;
+	add_post_meta($post_id, '_wp_trash_meta_comments_status', $statuses);
+	// Set status for all comments to post-trashed
+	$result = $wpdb->update($wpdb->comments, array('comment_approved' => 'post-trashed'), array('comment_post_ID' => $post_id));
+	clean_comment_cache( array_keys($statuses) );
+	do_action('trashed_post_comments', $post_id, $statuses);
+	return $result;
+}
+/**
+* Restore comments for a post from the trash
+*
+* @since 2.9.0
+* @uses do_action() on 'untrash_post_comments' before trashing
+* @uses do_action() on 'untrashed_post_comments' after trashing
+*
+* @param int $post Post ID or object.
+* @return mixed False on failure
+*/
+function wp_untrash_post_comments($post = null) {
+	global $wpdb;
+	$post = get_post($post);
+	if ( empty($post) )
+		return;
+	$post_id = $post->ID;
+	$statuses = get_post_meta($post_id, '_wp_trash_meta_comments_status', true);
+	if ( empty($statuses) )
+		return true;
+	do_action('untrash_post_comments', $post_id);
+	// Restore each comment to its original status
+	$group_by_status = array();
+	foreach ( $statuses as $comment_id => $comment_status )
+		$group_by_status[$comment_status][] = $comment_id;
+	foreach ( $group_by_status as $status => $comments ) {
+		// Sanity check. This shouldn't happen.
+		if ( 'post-trashed' == $status )
+			$status = '0';
+		$comments_in = implode( "', '", $comments );
+		$wpdb->query( "UPDATE $wpdb->comments SET comment_approved = '$status' WHERE comment_ID IN ('" . $comments_in . "')" );
+	}
+	clean_comment_cache( array_keys($statuses) );
+	delete_post_meta($post_id, '_wp_trash_meta_comments_status');
+	do_action('untrashed_post_comments', $post_id);
+}
+/**
+* Retrieve the list of categories for a post.
+*
+* Compatibility layer for themes and plugins. Also an easy layer of abstraction
+* away from the complexity of the taxonomy layer.
+*
+* @since 2.1.0
+*
+* @uses wp_get_object_terms() Retrieves the categories. Args details can be found here.
+*
+* @param int $post_id Optional. The Post ID.
+* @param array $args Optional. Overwrite the defaults.
+* @return array
+*/
+function wp_get_post_categories( $post_id = 0, $args = array() ) {
+	$post_id = (int) $post_id;
+	$defaults = array('fields' => 'ids');
+	$args = wp_parse_args( $args, $defaults );
+	$cats = wp_get_object_terms($post_id, 'category', $args);
+	return $cats;
+}
+/**
+* Retrieve the tags for a post.
+*
+* There is only one default for this function, called 'fields' and by default
+* is set to 'all'. There are other defaults that can be overridden in
+* {@link wp_get_object_terms()}.
+*
+* @package WordPress
+* @subpackage Post
+* @since 2.3.0
+*
+* @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
+*
+* @param int $post_id Optional. The Post ID
+* @param array $args Optional. Overwrite the defaults
+* @return array List of post tags.
+*/
+function wp_get_post_tags( $post_id = 0, $args = array() ) {
+	return wp_get_post_terms( $post_id, 'post_tag', $args);
+}
+/**
+* Retrieve the terms for a post.
+*
+* There is only one default for this function, called 'fields' and by default
+* is set to 'all'. There are other defaults that can be overridden in
+* {@link wp_get_object_terms()}.
+*
+* @package WordPress
+* @subpackage Post
+* @since 2.8.0
+*
+* @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
+*
+* @param int $post_id Optional. The Post ID
+* @param string $taxonomy The taxonomy for which to retrieve terms. Defaults to post_tag.
+* @param array $args Optional. Overwrite the defaults
+* @return array List of post tags.
+*/
+function wp_get_post_terms( $post_id = 0, $taxonomy = 'post_tag', $args = array() ) {
+	$post_id = (int) $post_id;
+	$defaults = array('fields' => 'all');
+	$args = wp_parse_args( $args, $defaults );
+	$tags = wp_get_object_terms($post_id, $taxonomy, $args);
+	return $tags;
+}
+/**
+* Retrieve number of recent posts.
+*
+* @since 1.0.0
+* @uses $wpdb
+*
+* @param int $num Optional, default is 10. Number of posts to get.
+* @return array List of posts.
+*/
+function wp_get_recent_posts($num = 10) {
+	global $wpdb;
+	// Set the limit clause, if we got a limit
+	$num = (int) $num;
+	if ( $num ) {
+		$limit = "LIMIT $num";
+	}
+	$sql = "SELECT * FROM $wpdb->posts WHERE post_type = 'post' AND post_status IN ( 'draft', 'publish', 'future', 'pending', 'private' ) ORDER BY post_date DESC $limit";
+	$result = $wpdb->get_results($sql, ARRAY_A);
+	return $result ? $result : array();
+}
+/**
+* Retrieve a single post, based on post ID.
+*
+* Has categories in 'post_category' property or key. Has tags in 'tags_input'
+* property or key.
+*
+* @since 1.0.0
+*
+* @param int $postid Post ID.
+* @param string $mode How to return result, either OBJECT, ARRAY_N, or ARRAY_A.
+* @return object|array Post object or array holding post contents and information
+*/
+function wp_get_single_post($postid = 0, $mode = OBJECT) {
+	$postid = (int) $postid;
+	$post = get_post($postid, $mode);
+	// Set categories and tags
+	if($mode == OBJECT) {
+		$post->post_category = wp_get_post_categories($postid);
+		$post->tags_input = wp_get_post_tags($postid, array('fields' => 'names'));
+	}
+	else {
+		$post['post_category'] = wp_get_post_categories($postid);
+		$post['tags_input'] = wp_get_post_tags($postid, array('fields' => 'names'));
+	}
+	return $post;
+}
+/**
+* Insert a post.
+*
+* If the $postarr parameter has 'ID' set to a value, then post will be updated.
+*
+* You can set the post date manually, but setting the values for 'post_date'
+* and 'post_date_gmt' keys. You can close the comments or open the comments by
+* setting the value for 'comment_status' key.
+*
+* The defaults for the parameter $postarr are:
+*     'post_status'   - Default is 'draft'.
+*     'post_type'     - Default is 'post'.
+*     'post_author'   - Default is current user ID ($user_ID). The ID of the user who added the post.
+*     'ping_status'   - Default is the value in 'default_ping_status' option.
+*                       Whether the attachment can accept pings.
+*     'post_parent'   - Default is 0. Set this for the post it belongs to, if any.
+*     'menu_order'    - Default is 0. The order it is displayed.
+*     'to_ping'       - Whether to ping.
+*     'pinged'        - Default is empty string.
+*     'post_password' - Default is empty string. The password to access the attachment.
+*     'guid'          - Global Unique ID for referencing the attachment.
+*     'post_content_filtered' - Post content filtered.
+*     'post_excerpt'  - Post excerpt.
+*
+* @since 1.0.0
+* @link http://core.trac.wordpress.org/ticket/9084 Bug report on 'wp_insert_post_data' filter.
+* @uses $wpdb
+* @uses $wp_rewrite
+* @uses $user_ID
+*
+* @uses do_action() Calls 'pre_post_update' on post ID if this is an update.
+* @uses do_action() Calls 'edit_post' action on post ID and post data if this is an update.
+* @uses do_action() Calls 'save_post' and 'wp_insert_post' on post id and post data just before
+*                   returning.
+*
+* @uses apply_filters() Calls 'wp_insert_post_data' passing $data, $postarr prior to database
+*                       update or insert.
+* @uses wp_transition_post_status()
+*
+* @param array $postarr Optional. Overrides defaults.
+* @param bool $wp_error Optional. Allow return of WP_Error on failure.
+* @return int|WP_Error The value 0 or WP_Error on failure. The post ID on success.
+*/
+function wp_insert_post($postarr = array(), $wp_error = false) {
+	global $wpdb, $wp_rewrite, $user_ID;
+	$defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
+		'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
+		'menu_order' => 0, 'to_ping' =>  '', 'pinged' => '', 'post_password' => '',
+		'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0);
+	$postarr = wp_parse_args($postarr, $defaults);
+	$postarr = sanitize_post($postarr, 'db');
+	// export array as variables
+	extract($postarr, EXTR_SKIP);
+	// Are we updating or creating?
+	$update = false;
+	if ( !empty($ID) ) {
+		$update = true;
+		$previous_status = get_post_field('post_status', $ID);
+	} else {
+		$previous_status = 'new';
+	}
+	if ( ('' == $post_content) && ('' == $post_title) && ('' == $post_excerpt) && ('attachment' != $post_type) ) {
+		if ( $wp_error )
+			return new WP_Error('empty_content', __('Content, title, and excerpt are empty.'));
+		else
+			return 0;
+	}
+	// Make sure we set a valid category
+	if ( empty($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
+		$post_category = array(get_option('default_category'));
+	}
+	//Set the default tag list
+	if ( !isset($tags_input) )
+		$tags_input = array();
+	if ( empty($post_author) )
+		$post_author = $user_ID;
+	if ( empty($post_status) )
+		$post_status = 'draft';
+	if ( empty($post_type) )
+		$post_type = 'post';
+	$post_ID = 0;
+	// Get the post ID and GUID
+	if ( $update ) {
+		$post_ID = (int) $ID;
+		$guid = get_post_field( 'guid', $post_ID );
+	}
+	// Don't allow contributors to set to set the post slug for pending review posts
+	if ( 'pending' == $post_status && !current_user_can( 'publish_posts' ) )
+		$post_name = '';
+	// Create a valid post name.  Drafts and pending posts are allowed to have an empty
+	// post name.
+	if ( !isset($post_name) || empty($post_name) ) {
+		if ( !in_array( $post_status, array( 'draft', 'pending' ) ) )
+			$post_name = sanitize_title($post_title);
+		else
+			$post_name = '';
+	} else {
+		$post_name = sanitize_title($post_name);
+	}
+	// If the post date is empty (due to having been new or a draft) and status is not 'draft' or 'pending', set date to now
+	if ( empty($post_date) || '0000-00-00 00:00:00' == $post_date )
+		$post_date = current_time('mysql');
+	if ( empty($post_date_gmt) || '0000-00-00 00:00:00' == $post_date_gmt ) {
+		if ( !in_array( $post_status, array( 'draft', 'pending' ) ) )
+			$post_date_gmt = get_gmt_from_date($post_date);
+		else
+			$post_date_gmt = '0000-00-00 00:00:00';
+	}
+	if ( $update || '0000-00-00 00:00:00' == $post_date ) {
+		$post_modified     = current_time( 'mysql' );
+		$post_modified_gmt = current_time( 'mysql', 1 );
+	} else {
+		$post_modified     = $post_date;
+		$post_modified_gmt = $post_date_gmt;
+	}
+	if ( 'publish' == $post_status ) {
+		$now = gmdate('Y-m-d H:i:59');
+		if ( mysql2date('U', $post_date_gmt, false) > mysql2date('U', $now, false) )
+			$post_status = 'future';
+	}
+	if ( empty($comment_status) ) {
+		if ( $update )
+			$comment_status = 'closed';
+		else
+			$comment_status = get_option('default_comment_status');
+	}
+	if ( empty($ping_status) )
+		$ping_status = get_option('default_ping_status');
+	if ( isset($to_ping) )
+		$to_ping = preg_replace('|\s+|', "\n", $to_ping);
+	else
+		$to_ping = '';
+	if ( ! isset($pinged) )
+		$pinged = '';
+	if ( isset($post_parent) )
+		$post_parent = (int) $post_parent;
+	else
+		$post_parent = 0;
+	if ( !empty($post_ID) ) {
+		if ( $post_parent == $post_ID ) {
+			// Post can't be its own parent
+			$post_parent = 0;
+		} elseif ( !empty($post_parent) ) {
+			$parent_post = get_post($post_parent);
+			// Check for circular dependency
+			if ( $parent_post->post_parent == $post_ID )
+				$post_parent = 0;
+		}
+	}
+	if ( isset($menu_order) )
+		$menu_order = (int) $menu_order;
+	else
+		$menu_order = 0;
+	if ( !isset($post_password) || 'private' == $post_status )
+		$post_password = '';
+	$post_name = wp_unique_post_slug($post_name, $post_ID, $post_status, $post_type, $post_parent);
+	// expected_slashed (everything!)
+	$data = compact( array( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_content_filtered', 'post_title', 'post_excerpt', 'post_status', 'post_type', 'comment_status', 'ping_status', 'post_password', 'post_name', 'to_ping', 'pinged', 'post_modified', 'post_modified_gmt', 'post_parent', 'menu_order', 'guid' ) );
+	$data = apply_filters('wp_insert_post_data', $data, $postarr);
+	$data = stripslashes_deep( $data );
+	$where = array( 'ID' => $post_ID );
+	if ($update) {
+		do_action( 'pre_post_update', $post_ID );
+		if ( false === $wpdb->update( $wpdb->posts, $data, $where ) ) {
+			if ( $wp_error )
+				return new WP_Error('db_update_error', __('Could not update post in the database'), $wpdb->last_error);
+			else
+				return 0;
+		}
+	} else {
+		if ( isset($post_mime_type) )
+			$data['post_mime_type'] = stripslashes( $post_mime_type ); // This isn't in the update
+		// If there is a suggested ID, use it if not already present
+		if ( !empty($import_id) ) {
+			$import_id = (int) $import_id;
+			if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
+				$data['ID'] = $import_id;
+			}
+		}
+		if ( false === $wpdb->insert( $wpdb->posts, $data ) ) {
+			if ( $wp_error )
+				return new WP_Error('db_insert_error', __('Could not insert post into the database'), $wpdb->last_error);
+			else
+				return 0;
+		}
+		$post_ID = (int) $wpdb->insert_id;
+		// use the newly generated $post_ID
+		$where = array( 'ID' => $post_ID );
+	}
+	if ( empty($data['post_name']) && !in_array( $data['post_status'], array( 'draft', 'pending' ) ) ) {
+		$data['post_name'] = sanitize_title($data['post_title'], $post_ID);
+		$wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
+	}
+	wp_set_post_categories( $post_ID, $post_category );
+	// old-style tags_input
+	if ( !empty($tags_input) )
+		wp_set_post_tags( $post_ID, $tags_input );
+	// new-style support for all tag-like taxonomies
+	if ( !empty($tax_input) ) {
+		foreach ( $tax_input as $taxonomy => $tags ) {
+			wp_set_post_terms( $post_ID, $tags, $taxonomy );
+		}
+	}
+	$current_guid = get_post_field( 'guid', $post_ID );
+	if ( 'page' == $data['post_type'] )
+		clean_page_cache($post_ID);
+	else
+		clean_post_cache($post_ID);
+	// Set GUID
+	if ( !$update && '' == $current_guid )
+		$wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post_ID ) ), $where );
+	$post = get_post($post_ID);
+	if ( !empty($page_template) && 'page' == $data['post_type'] ) {
+		$post->page_template = $page_template;
+		$page_templates = get_page_templates();
+		if ( 'default' != $page_template && !in_array($page_template, $page_templates) ) {
+			if ( $wp_error )
+				return new WP_Error('invalid_page_template', __('The page template is invalid.'));
+			else
+				return 0;
+		}
+		update_post_meta($post_ID, '_wp_page_template',  $page_template);
+	}
+	wp_transition_post_status($data['post_status'], $previous_status, $post);
+	if ( $update)
+		do_action('edit_post', $post_ID, $post);
+	do_action('save_post', $post_ID, $post);
+	do_action('wp_insert_post', $post_ID, $post);
+	return $post_ID;
+}
+/**
+* Update a post with new post data.
+*
+* The date does not have to be set for drafts. You can set the date and it will
+* not be overridden.
+*
+* @since 1.0.0
+*
+* @param array|object $postarr Post data. Arrays are expected to be escaped, objects are not.
+* @return int 0 on failure, Post ID on success.
+*/
+function wp_update_post($postarr = array()) {
+	if ( is_object($postarr) ) {
+		// non-escaped post was passed
+		$postarr = get_object_vars($postarr);
+		$postarr = add_magic_quotes($postarr);
+	}
+	// First, get all of the original fields
+	$post = wp_get_single_post($postarr['ID'], ARRAY_A);
+	// Escape data pulled from DB.
+	$post = add_magic_quotes($post);
+	// Passed post category list overwrites existing category list if not empty.
+	if ( isset($postarr['post_category']) && is_array($postarr['post_category'])
+			 && 0 != count($postarr['post_category']) )
+		$post_cats = $postarr['post_category'];
+	else
+		$post_cats = $post['post_category'];
+	// Drafts shouldn't be assigned a date unless explicitly done so by the user
+	if ( in_array($post['post_status'], array('draft', 'pending')) && empty($postarr['edit_date']) &&
+			 ('0000-00-00 00:00:00' == $post['post_date_gmt']) )
+		$clear_date = true;
+	else
+		$clear_date = false;
+	// Merge old and new fields with new fields overwriting old ones.
+	$postarr = array_merge($post, $postarr);
+	$postarr['post_category'] = $post_cats;
+	if ( $clear_date ) {
+		$postarr['post_date'] = current_time('mysql');
+		$postarr['post_date_gmt'] = '';
+	}
+	if ($postarr['post_type'] == 'attachment')
+		return wp_insert_attachment($postarr);
+	return wp_insert_post($postarr);
+}
+/**
+* Publish a post by transitioning the post status.
+*
+* @since 2.1.0
+* @uses $wpdb
+* @uses do_action() Calls 'edit_post', 'save_post', and 'wp_insert_post' on post_id and post data.
+*
+* @param int $post_id Post ID.
+* @return null
+*/
+function wp_publish_post($post_id) {
+	global $wpdb;
+	$post = get_post($post_id);
+	if ( empty($post) )
+		return;
+	if ( 'publish' == $post->post_status )
+		return;
+	$wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post_id ) );
+	$old_status = $post->post_status;
+	$post->post_status = 'publish';
+	wp_transition_post_status('publish', $old_status, $post);
+	// Update counts for the post's terms.
+	foreach ( (array) get_object_taxonomies('post') as $taxonomy ) {
+		$tt_ids = wp_get_object_terms($post_id, $taxonomy, 'fields=tt_ids');
+		wp_update_term_count($tt_ids, $taxonomy);
+	}
+	do_action('edit_post', $post_id, $post);
+	do_action('save_post', $post_id, $post);
+	do_action('wp_insert_post', $post_id, $post);
+}
+/**
+* Publish future post and make sure post ID has future post status.
+*
+* Invoked by cron 'publish_future_post' event. This safeguard prevents cron
+* from publishing drafts, etc.
+*
+* @since 2.5.0
+*
+* @param int $post_id Post ID.
+* @return null Nothing is returned. Which can mean that no action is required or post was published.
+*/
+function check_and_publish_future_post($post_id) {
+	$post = get_post($post_id);
+	if ( empty($post) )
+		return;
+	if ( 'future' != $post->post_status )
+		return;
+	$time = strtotime( $post->post_date_gmt . ' GMT' );
+	if ( $time > time() ) { // Uh oh, someone jumped the gun!
+		wp_clear_scheduled_hook( 'publish_future_post', $post_id ); // clear anything else in the system
+		wp_schedule_single_event( $time, 'publish_future_post', array( $post_id ) );
+		return;
+	}
+	return wp_publish_post($post_id);
+}
+/**
+* Given the desired slug and some post details computes a unique slug for the post.
+*
+* @global wpdb $wpdb
+* @global WP_Rewrite $wp_rewrite
+* @param string $slug the desired slug (post_name)
+* @param integer $post_ID
+* @param string $post_status no uniqueness checks are made if the post is still draft or pending
+* @param string $post_type
+* @param integer $post_parent
+* @return string unique slug for the post, based on $post_name (with a -1, -2, etc. suffix)
+*/
+function wp_unique_post_slug($slug, $post_ID, $post_status, $post_type, $post_parent) {
+	if ( in_array( $post_status, array( 'draft', 'pending' ) ) )
+		return $slug;
+	global $wpdb, $wp_rewrite;
+	$feeds = $wp_rewrite->feeds;
+	if ( !is_array($feeds) )
+		$feeds = array();
+	$hierarchical_post_types = apply_filters('hierarchical_post_types', array('page'));
+	if ( 'attachment' == $post_type ) {
+		// Attachment slugs must be unique across all types.
+		$check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND ID != %d LIMIT 1";
+		$post_name_check = $wpdb->get_var($wpdb->prepare($check_sql, $slug, $post_ID));
+		if ( $post_name_check || in_array($slug, $feeds) ) {
+			$suffix = 2;
+			do {
+				$alt_post_name = substr($slug, 0, 200-(strlen($suffix)+1)). "-$suffix";
+				$post_name_check = $wpdb->get_var($wpdb->prepare($check_sql, $alt_post_name, $post_ID));
+				$suffix++;
+			} while ($post_name_check);
+			$slug = $alt_post_name;
+		}
+	} elseif ( in_array($post_type, $hierarchical_post_types) ) {
+		// Page slugs must be unique within their own trees.  Pages are in a
+		// separate namespace than posts so page slugs are allowed to overlap post slugs.
+		$check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type IN ( '" . implode("', '", esc_sql($hierarchical_post_types)) . "' ) AND ID != %d AND post_parent = %d LIMIT 1";
+		$post_name_check = $wpdb->get_var($wpdb->prepare($check_sql, $slug, $post_ID, $post_parent));
+		if ( $post_name_check || in_array($slug, $feeds) ) {
+			$suffix = 2;
+			do {
+				$alt_post_name = substr($slug, 0, 200-(strlen($suffix)+1)). "-$suffix";
+				$post_name_check = $wpdb->get_var($wpdb->prepare($check_sql, $alt_post_name, $post_ID, $post_parent));
+				$suffix++;
+			} while ($post_name_check);
+			$slug = $alt_post_name;
+		}
+	} else {
+		// Post slugs must be unique across all posts.
+		$check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d LIMIT 1";
+		$post_name_check = $wpdb->get_var($wpdb->prepare($check_sql, $slug, $post_type, $post_ID));
+		if ( $post_name_check || in_array($slug, $wp_rewrite->feeds) ) {
+			$suffix = 2;
+			do {
+				$alt_post_name = substr($slug, 0, 200-(strlen($suffix)+1)). "-$suffix";
+				$post_name_check = $wpdb->get_var($wpdb->prepare($check_sql, $alt_post_name, $post_type, $post_ID));
+				$suffix++;
+			} while ($post_name_check);
+			$slug = $alt_post_name;
+		}
+	}
+	return $slug;
+}
+/**
+* Adds tags to a post.
+*
+* @uses wp_set_post_tags() Same first two parameters, but the last parameter is always set to true.
+*
+* @package WordPress
+* @subpackage Post
+* @since 2.3.0
+*
+* @param int $post_id Post ID
+* @param string $tags The tags to set for the post, separated by commas.
+* @return bool|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
+*/
+function wp_add_post_tags($post_id = 0, $tags = '') {
+	return wp_set_post_tags($post_id, $tags, true);
+}
+/**
+* Set the tags for a post.
+*
+* @since 2.3.0
+* @uses wp_set_object_terms() Sets the tags for the post.
+*
+* @param int $post_id Post ID.
+* @param string $tags The tags to set for the post, separated by commas.
+* @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
+* @return bool|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
+*/
+function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
+	return wp_set_post_terms( $post_id, $tags, 'post_tag', $append);
+}
+/**
+* Set the terms for a post.
+*
+* @since 2.8.0
+* @uses wp_set_object_terms() Sets the tags for the post.
+*
+* @param int $post_id Post ID.
+* @param string $tags The tags to set for the post, separated by commas.
+* @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
+* @return bool|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
+*/
+function wp_set_post_terms( $post_id = 0, $tags = '', $taxonomy = 'post_tag', $append = false ) {
+	$post_id = (int) $post_id;
+	if ( !$post_id )
+		return false;
+	if ( empty($tags) )
+		$tags = array();
+	$tags = is_array($tags) ? $tags : explode( ',', trim($tags, " \n\t\r\0\x0B,") );
+	wp_set_object_terms($post_id, $tags, $taxonomy, $append);
+}
+/**
+* Set categories for a post.
+*
+* If the post categories parameter is not set, then the default category is
+* going used.
+*
+* @since 2.1.0
+*
+* @param int $post_ID Post ID.
+* @param array $post_categories Optional. List of categories.
+* @return bool|mixed
+*/
+function wp_set_post_categories($post_ID = 0, $post_categories = array()) {
+	$post_ID = (int) $post_ID;
+	// If $post_categories isn't already an array, make it one:
+	if (!is_array($post_categories) || 0 == count($post_categories) || empty($post_categories))
+		$post_categories = array(get_option('default_category'));
+	else if ( 1 == count($post_categories) && '' == $post_categories[0] )
+		return true;
+	$post_categories = array_map('intval', $post_categories);
+	$post_categories = array_unique($post_categories);
+	return wp_set_object_terms($post_ID, $post_categories, 'category');
+}
+/**
+* Transition the post status of a post.
+*
+* Calls hooks to transition post status.
+*
+* The first is 'transition_post_status' with new status, old status, and post data.
+*
+* The next action called is 'OLDSTATUS_to_NEWSTATUS' the 'NEWSTATUS' is the
+* $new_status parameter and the 'OLDSTATUS' is $old_status parameter; it has the
+* post data.
+*
+* The final action is named 'NEWSTATUS_POSTTYPE', 'NEWSTATUS' is from the $new_status
+* parameter and POSTTYPE is post_type post data.
+*
+* @since 2.3.0
+* @link http://codex.wordpress.org/Post_Status_Transitions
+*
+* @uses do_action() Calls 'transition_post_status' on $new_status, $old_status and
+*  $post if there is a status change.
+* @uses do_action() Calls '${old_status}_to_$new_status' on $post if there is a status change.
+* @uses do_action() Calls '${new_status}_$post->post_type' on post ID and $post.
+*
+* @param string $new_status Transition to this post status.
+* @param string $old_status Previous post status.
+* @param object $post Post data.
+*/
+function wp_transition_post_status($new_status, $old_status, $post) {
+	do_action('transition_post_status', $new_status, $old_status, $post);
+	do_action("${old_status}_to_$new_status", $post);
+	do_action("${new_status}_$post->post_type", $post->ID, $post);
+}
+//
+// Trackback and ping functions
+//
+/**
+* Add a URL to those already pung.
+*
+* @since 1.5.0
+* @uses $wpdb
+*
+* @param int $post_id Post ID.
+* @param string $uri Ping URI.
+* @return int How many rows were updated.
+*/
+function add_ping($post_id, $uri) {
+	global $wpdb;
+	$pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
+	$pung = trim($pung);
+	$pung = preg_split('/\s/', $pung);
+	$pung[] = $uri;
+	$new = implode("\n", $pung);
+	$new = apply_filters('add_ping', $new);
+	// expected_slashed ($new)
+	$new = stripslashes($new);
+	return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) );
+}
+/**
+* Retrieve enclosures already enclosed for a post.
+*
+* @since 1.5.0
+* @uses $wpdb
+*
+* @param int $post_id Post ID.
+* @return array List of enclosures
+*/
+function get_enclosed($post_id) {
+	$custom_fields = get_post_custom( $post_id );
+	$pung = array();
+	if ( !is_array( $custom_fields ) )
+		return $pung;
+	foreach ( $custom_fields as $key => $val ) {
+		if ( 'enclosure' != $key || !is_array( $val ) )
+			continue;
+		foreach( $val as $enc ) {
+			$enclosure = split( "\n", $enc );
+			$pung[] = trim( $enclosure[ 0 ] );
+		}
+	}
+	$pung = apply_filters('get_enclosed', $pung);
+	return $pung;
+}
+/**
+* Retrieve URLs already pinged for a post.
+*
+* @since 1.5.0
+* @uses $wpdb
+*
+* @param int $post_id Post ID.
+* @return array
+*/
+function get_pung($post_id) {
+	global $wpdb;
+	$pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
+	$pung = trim($pung);
+	$pung = preg_split('/\s/', $pung);
+	$pung = apply_filters('get_pung', $pung);
+	return $pung;
+}
+/**
+* Retrieve URLs that need to be pinged.
+*
+* @since 1.5.0
+* @uses $wpdb
+*
+* @param int $post_id Post ID
+* @return array
+*/
+function get_to_ping($post_id) {
+	global $wpdb;
+	$to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id ));
+	$to_ping = trim($to_ping);
+	$to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);
+	$to_ping = apply_filters('get_to_ping',  $to_ping);
+	return $to_ping;
+}
+/**
+* Do trackbacks for a list of URLs.
+*
+* @since 1.0.0
+*
+* @param string $tb_list Comma separated list of URLs
+* @param int $post_id Post ID
+*/
+function trackback_url_list($tb_list, $post_id) {
+	if ( ! empty( $tb_list ) ) {
+		// get post data
+		$postdata = wp_get_single_post($post_id, ARRAY_A);
+		// import postdata as variables
+		extract($postdata, EXTR_SKIP);
+		// form an excerpt
+		$excerpt = strip_tags($post_excerpt ? $post_excerpt : $post_content);
+		if (strlen($excerpt) > 255) {
+			$excerpt = substr($excerpt,0,252) . '...';
+		}
+		$trackback_urls = explode(',', $tb_list);
+		foreach( (array) $trackback_urls as $tb_url) {
+			$tb_url = trim($tb_url);
+			trackback($tb_url, stripslashes($post_title), $excerpt, $post_id);
+		}
+	}
+}
+//
+// Page functions
+//
+/**
+* Get a list of page IDs.
+*
+* @since 2.0.0
+* @uses $wpdb
+*
+* @return array List of page IDs.
+*/
+function get_all_page_ids() {
+	global $wpdb;
+	if ( ! $page_ids = wp_cache_get('all_page_ids', 'posts') ) {
+		$page_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type = 'page'");
+		wp_cache_add('all_page_ids', $page_ids, 'posts');
+	}
+	return $page_ids;
+}
+/**
+* Retrieves page data given a page ID or page object.
+*
+* @since 1.5.1
+*
+* @param mixed $page Page object or page ID. Passed by reference.
+* @param string $output What to output. OBJECT, ARRAY_A, or ARRAY_N.
+* @param string $filter How the return value should be filtered.
+* @return mixed Page data.
+*/
+function &get_page(&$page, $output = OBJECT, $filter = 'raw') {
+	if ( empty($page) ) {
+		if ( isset( $GLOBALS['post'] ) && isset( $GLOBALS['post']->ID ) ) {
+			return get_post($GLOBALS['post'], $output, $filter);
+		} else {
+			$page = null;
+			return $page;
+		}
+	}
+	$the_page = get_post($page, $output, $filter);
+	return $the_page;
+}
+/**
+* Retrieves a page given its path.
+*
+* @since 2.1.0
+* @uses $wpdb
+*
+* @param string $page_path Page path
+* @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A.
+* @return mixed Null when complete.
+*/
+function get_page_by_path($page_path, $output = OBJECT) {
+	global $wpdb;
+	$page_path = rawurlencode(urldecode($page_path));
+	$page_path = str_replace('%2F', '/', $page_path);
+	$page_path = str_replace('%20', ' ', $page_path);
+	$page_paths = '/' . trim($page_path, '/');
+	$leaf_path  = sanitize_title(basename($page_paths));
+	$page_paths = explode('/', $page_paths);
+	$full_path = '';
+	foreach( (array) $page_paths as $pathdir)
+		$full_path .= ($pathdir!=''?'/':'') . sanitize_title($pathdir);
+	$pages = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_name = %s AND (post_type = 'page' OR post_type = 'attachment')", $leaf_path ));
+	if ( empty($pages) )
+		return null;
+	foreach ($pages as $page) {
+		$path = '/' . $leaf_path;
+		$curpage = $page;
+		while ($curpage->post_parent != 0) {
+			$curpage = $wpdb->get_row( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE ID = %d and post_type='page'", $curpage->post_parent ));
+			$path = '/' . $curpage->post_name . $path;
+		}
+		if ( $path == $full_path )
+			return get_page($page->ID, $output);
+	}
+	return null;
+}
+/**
+* Retrieve a page given its title.
+*
+* @since 2.1.0
+* @uses $wpdb
+*
+* @param string $page_title Page title
+* @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A.
+* @return mixed
+*/
+function get_page_by_title($page_title, $output = OBJECT) {
+	global $wpdb;
+	$page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type='page'", $page_title ));
+	if ( $page )
+		return get_page($page, $output);
+	return null;
+}
+/**
+* Retrieve child pages from list of pages matching page ID.
+*
+* Matches against the pages parameter against the page ID. Also matches all
+* children for the same to retrieve all children of a page. Does not make any
+* SQL queries to get the children.
+*
+* @since 1.5.1
+*
+* @param int $page_id Page ID.
+* @param array $pages List of pages' objects.
+* @return array
+*/
+function &get_page_children($page_id, $pages) {
+	$page_list = array();
+	foreach ( (array) $pages as $page ) {
+		if ( $page->post_parent == $page_id ) {
+			$page_list[] = $page;
+			if ( $children = get_page_children($page->ID, $pages) )
+				$page_list = array_merge($page_list, $children);
+		}
+	}
+	return $page_list;
+}
+/**
+* Order the pages with children under parents in a flat list.
+*
+* It uses auxiliary structure to hold parent-children relationships and
+* runs in O(N) complexity
+*
+* @since 2.0.0
+*
+* @param array $posts Posts array.
+* @param int $parent Parent page ID.
+* @return array A list arranged by hierarchy. Children immediately follow their parents.
+*/
+function &get_page_hierarchy( &$pages, $page_id = 0 ) {
+	if ( empty( $pages ) ) {
+		$return = array();
+		return $return;
+	}
+	$children = array();
+	foreach ( (array) $pages as $p ) {
+		$parent_id = intval( $p->post_parent );
+		$children[ $parent_id ][] = $p;
+	 }
+	 $result = array();
+	 _page_traverse_name( $page_id, $children, $result );
+	return $result;
+}
+/**
+* function to traverse and return all the nested children post names of a root page.
+* $children contains parent-chilren relations
+*
+*/
+function _page_traverse_name( $page_id, &$children, &$result ){
+	if ( isset( $children[ $page_id ] ) ){
+		foreach( (array)$children[ $page_id ] as $child ) {
+			$result[ $child->ID ] = $child->post_name;
+			_page_traverse_name( $child->ID, $children, $result );
+		}
+	}
+}
+/**
+* Builds URI for a page.
+*
+* Sub pages will be in the "directory" under the parent page post name.
+*
+* @since 1.5.0
+*
+* @param int $page_id Page ID.
+* @return string Page URI.
+*/
+function get_page_uri($page_id) {
+	$page = get_page($page_id);
+	$uri = $page->post_name;
+	// A page cannot be it's own parent.
+	if ( $page->post_parent == $page->ID )
+		return $uri;
+	while ($page->post_parent != 0) {
+		$page = get_page($page->post_parent);
+		$uri = $page->post_name . "/" . $uri;
+	}
+	return $uri;
+}
+/**
+* Retrieve a list of pages.
+*
+* The defaults that can be overridden are the following: 'child_of',
+* 'sort_order', 'sort_column', 'post_title', 'hierarchical', 'exclude',
+* 'include', 'meta_key', 'meta_value','authors', 'number', and 'offset'.
+*
+* @since 1.5.0
+* @uses $wpdb
+*
+* @param mixed $args Optional. Array or string of options that overrides defaults.
+* @return array List of pages matching defaults or $args
+*/
+function &get_pages($args = '') {
+	global $wpdb;
+	$defaults = array(
+		'child_of' => 0, 'sort_order' => 'ASC',
+		'sort_column' => 'post_title', 'hierarchical' => 1,
+		'exclude' => '', 'include' => '',
+		'meta_key' => '', 'meta_value' => '',
+		'authors' => '', 'parent' => -1, 'exclude_tree' => '',
+		'number' => '', 'offset' => 0
+	);
+	$r = wp_parse_args( $args, $defaults );
+	extract( $r, EXTR_SKIP );
+	$number = (int) $number;
+	$offset = (int) $offset;
+	$cache = array();
+	$key = md5( serialize( compact(array_keys($defaults)) ) );
+	if ( $cache = wp_cache_get( 'get_pages', 'posts' ) ) {
+		if ( is_array($cache) && isset( $cache[ $key ] ) ) {
+			$pages = apply_filters('get_pages', $cache[ $key ], $r );
+			return $pages;
+		}
+	}
+	if ( !is_array($cache) )
+		$cache = array();
+	$inclusions = '';
+	if ( !empty($include) ) {
+		$child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include
+		$parent = -1;
+		$exclude = '';
+		$meta_key = '';
+		$meta_value = '';
+		$hierarchical = false;
+		$incpages = preg_split('/[\s,]+/',$include);
+		if ( count($incpages) ) {
+			foreach ( $incpages as $incpage ) {
+				if (empty($inclusions))
+					$inclusions = $wpdb->prepare(' AND ( ID = %d ', $incpage);
+				else
+					$inclusions .= $wpdb->prepare(' OR ID = %d ', $incpage);
+			}
+		}
+	}
+	if (!empty($inclusions))
+		$inclusions .= ')';
+	$exclusions = '';
+	if ( !empty($exclude) ) {
+		$expages = preg_split('/[\s,]+/',$exclude);
+		if ( count($expages) ) {
+			foreach ( $expages as $expage ) {
+				if (empty($exclusions))
+					$exclusions = $wpdb->prepare(' AND ( ID <> %d ', $expage);
+				else
+					$exclusions .= $wpdb->prepare(' AND ID <> %d ', $expage);
+			}
+		}
+	}
+	if (!empty($exclusions))
+		$exclusions .= ')';
+	$author_query = '';
+	if (!empty($authors)) {
+		$post_authors = preg_split('/[\s,]+/',$authors);
+		if ( count($post_authors) ) {
+			foreach ( $post_authors as $post_author ) {
+				//Do we have an author id or an author login?
+				if ( 0 == intval($post_author) ) {
+					$post_author = get_userdatabylogin($post_author);
+					if ( empty($post_author) )
+						continue;
+					if ( empty($post_author->ID) )
+						continue;
+					$post_author = $post_author->ID;
+				}
+				if ( '' == $author_query )
+					$author_query = $wpdb->prepare(' post_author = %d ', $post_author);
+				else
+					$author_query .= $wpdb->prepare(' OR post_author = %d ', $post_author);
+			}
+			if ( '' != $author_query )
+				$author_query = " AND ($author_query)";
+		}
+	}
+	$join = '';
+	$where = "$exclusions $inclusions ";
+	if ( ! empty( $meta_key ) || ! empty( $meta_value ) ) {
+		$join = " LEFT JOIN $wpdb->postmeta ON ( $wpdb->posts.ID = $wpdb->postmeta.post_id )";
+		// meta_key and meta_value might be slashed
+		$meta_key = stripslashes($meta_key);
+		$meta_value = stripslashes($meta_value);
+		if ( ! empty( $meta_key ) )
+			$where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_key = %s", $meta_key);
+		if ( ! empty( $meta_value ) )
+			$where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_value = %s", $meta_value);
+	}
+	if ( $parent >= 0 )
+		$where .= $wpdb->prepare(' AND post_parent = %d ', $parent);
+	$query = "SELECT * FROM $wpdb->posts $join WHERE (post_type = 'page' AND post_status = 'publish') $where ";
+	$query .= $author_query;
+	$query .= " ORDER BY " . $sort_column . " " . $sort_order ;
+	if ( !empty($number) )
+		$query .= ' LIMIT ' . $offset . ',' . $number;
+	$pages = $wpdb->get_results($query);
+	if ( empty($pages) ) {
+		$pages = apply_filters('get_pages', array(), $r);
+		return $pages;
+	}
+	// Sanitize before caching so it'll only get done once
+	$num_pages = count($pages);
+	for ($i = 0; $i < $num_pages; $i++) {
+		$pages[$i] = sanitize_post($pages[$i], 'raw');
+	}
+	// Update cache.
+	update_page_cache($pages);
+	if ( $child_of || $hierarchical )
+		$pages = & get_page_children($child_of, $pages);
+	if ( !empty($exclude_tree) ) {
+		$exclude = (int) $exclude_tree;
+		$children = get_page_children($exclude, $pages);
+		$excludes = array();
+		foreach ( $children as $child )
+			$excludes[] = $child->ID;
+		$excludes[] = $exclude;
+		$num_pages = count($pages);
+		for ( $i = 0; $i < $num_pages; $i++ ) {
+			if ( in_array($pages[$i]->ID, $excludes) )
+				unset($pages[$i]);
+		}
+	}
+	$cache[ $key ] = $pages;
+	wp_cache_set( 'get_pages', $cache, 'posts' );
+	$pages = apply_filters('get_pages', $pages, $r);
+	return $pages;
+}
+//
+// Attachment functions
+//
+/**
+* Check if the attachment URI is local one and is really an attachment.
+*
+* @since 2.0.0
+*
+* @param string $url URL to check
+* @return bool True on success, false on failure.
+*/
+function is_local_attachment($url) {
+	if (strpos($url, get_bloginfo('url')) === false)
+		return false;
+	if (strpos($url, get_bloginfo('url') . '/?attachment_id=') !== false)
+		return true;
+	if ( $id = url_to_postid($url) ) {
+		$post = & get_post($id);
+		if ( 'attachment' == $post->post_type )
+			return true;
+	}
+	return false;
+}
+/**
+* Insert an attachment.
+*
+* If you set the 'ID' in the $object parameter, it will mean that you are
+* updating and attempt to update the attachment. You can also set the
+* attachment name or title by setting the key 'post_name' or 'post_title'.
+*
+* You can set the dates for the attachment manually by setting the 'post_date'
+* and 'post_date_gmt' keys' values.
+*
+* By default, the comments will use the default settings for whether the
+* comments are allowed. You can close them manually or keep them open by
+* setting the value for the 'comment_status' key.
+*
+* The $object parameter can have the following:
+*     'post_status'   - Default is 'draft'. Can not be overridden, set the same as parent post.
+*     'post_type'     - Default is 'post', will be set to attachment. Can not override.
+*     'post_author'   - Default is current user ID. The ID of the user, who added the attachment.
+*     'ping_status'   - Default is the value in default ping status option. Whether the attachment
+*                       can accept pings.
+*     'post_parent'   - Default is 0. Can use $parent parameter or set this for the post it belongs
+*                       to, if any.
+*     'menu_order'    - Default is 0. The order it is displayed.
+*     'to_ping'       - Whether to ping.
+*     'pinged'        - Default is empty string.
+*     'post_password' - Default is empty string. The password to access the attachment.
+*     'guid'          - Global Unique ID for referencing the attachment.
+*     'post_content_filtered' - Attachment post content filtered.
+*     'post_excerpt'  - Attachment excerpt.
+*
+* @since 2.0.0
+* @uses $wpdb
+* @uses $user_ID
+* @uses do_action() Calls 'edit_attachment' on $post_ID if this is an update.
+* @uses do_action() Calls 'add_attachment' on $post_ID if this is not an update.
+*
+* @param string|array $object Arguments to override defaults.
+* @param string $file Optional filename.
+* @param int $post_parent Parent post ID.
+* @return int Attachment ID.
+*/
+function wp_insert_attachment($object, $file = false, $parent = 0) {
+	global $wpdb, $user_ID;
+	$defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
+		'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
+		'menu_order' => 0, 'to_ping' =>  '', 'pinged' => '', 'post_password' => '',
+		'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0);
+	$object = wp_parse_args($object, $defaults);
+	if ( !empty($parent) )
+		$object['post_parent'] = $parent;
+	$object = sanitize_post($object, 'db');
+	// export array as variables
+	extract($object, EXTR_SKIP);
+	// Make sure we set a valid category
+	if ( !isset($post_category) || 0 == count($post_category) || !is_array($post_category)) {
+		$post_category = array(get_option('default_category'));
+	}
+	if ( empty($post_author) )
+		$post_author = $user_ID;
+	$post_type = 'attachment';
+	$post_status = 'inherit';
+	// Are we updating or creating?
+	if ( !empty($ID) ) {
+		$update = true;
+		$post_ID = (int) $ID;
+	} else {
+		$update = false;
+		$post_ID = 0;
+	}
+	// Create a valid post name.
+	if ( empty($post_name) )
+		$post_name = sanitize_title($post_title);
+	else
+		$post_name = sanitize_title($post_name);
+	// expected_slashed ($post_name)
+	$post_name = wp_unique_post_slug($post_name, $post_ID, $post_status, $post_type, $post_parent);
+	if ( empty($post_date) )
+		$post_date = current_time('mysql');
+	if ( empty($post_date_gmt) )
+		$post_date_gmt = current_time('mysql', 1);
+	if ( empty($post_modified) )
+		$post_modified = $post_date;
+	if ( empty($post_modified_gmt) )
+		$post_modified_gmt = $post_date_gmt;
+	if ( empty($comment_status) ) {
+		if ( $update )
+			$comment_status = 'closed';
+		else
+			$comment_status = get_option('default_comment_status');
+	}
+	if ( empty($ping_status) )
+		$ping_status = get_option('default_ping_status');
+	if ( isset($to_ping) )
+		$to_ping = preg_replace('|\s+|', "\n", $to_ping);
+	else
+		$to_ping = '';
+	if ( isset($post_parent) )
+		$post_parent = (int) $post_parent;
+	else
+		$post_parent = 0;
+	if ( isset($menu_order) )
+		$menu_order = (int) $menu_order;
+	else
+		$menu_order = 0;
+	if ( !isset($post_password) )
+		$post_password = '';
+	if ( ! isset($pinged) )
+		$pinged = '';
+	// expected_slashed (everything!)
+	$data = compact( array( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_content_filtered', 'post_title', 'post_excerpt', 'post_status', 'post_type', 'comment_status', 'ping_status', 'post_password', 'post_name', 'to_ping', 'pinged', 'post_modified', 'post_modified_gmt', 'post_parent', 'menu_order', 'post_mime_type', 'guid' ) );
+	$data = stripslashes_deep( $data );
+	if ( $update ) {
+		$wpdb->update( $wpdb->posts, $data, array( 'ID' => $post_ID ) );
+	} else {
+		// If there is a suggested ID, use it if not already present
+		if ( !empty($import_id) ) {
+			$import_id = (int) $import_id;
+			if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
+				$data['ID'] = $import_id;
+			}
+		}
+		$wpdb->insert( $wpdb->posts, $data );
+		$post_ID = (int) $wpdb->insert_id;
+	}
+	if ( empty($post_name) ) {
+		$post_name = sanitize_title($post_title, $post_ID);
+		$wpdb->update( $wpdb->posts, compact("post_name"), array( 'ID' => $post_ID ) );
+	}
+	wp_set_post_categories($post_ID, $post_category);
+	if ( $file )
+		update_attached_file( $post_ID, $file );
+	clean_post_cache($post_ID);
+	if ( isset($post_parent) && $post_parent < 0 )
+		add_post_meta($post_ID, '_wp_attachment_temp_parent', $post_parent, true);
+	if ( $update) {
+		do_action('edit_attachment', $post_ID);
+	} else {
+		do_action('add_attachment', $post_ID);
+	}
+	return $post_ID;
+}
+/**
+* Delete an attachment.
+*
+* Will remove the file also, when the attachment is removed. Removes all post
+* meta fields, taxonomy, comments, etc associated with the attachment (except
+* the main post).
+*
+* @since 2.0.0
+* @uses $wpdb
+* @uses do_action() Calls 'delete_attachment' hook on Attachment ID.
+*
+* @param int $postid Attachment ID.
+* @param bool $force_delete Whether to bypass trash and force deletion
+* @return mixed False on failure. Post data on success.
+*/
+function wp_delete_attachment( $post_id, $force_delete = false ) {
+	global $wpdb;
+	if ( !$post = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id) ) )
+		return $post;
+	if ( 'attachment' != $post->post_type )
+		return false;
+	if ( !$force_delete && EMPTY_TRASH_DAYS && MEDIA_TRASH && 'trash' != $post->post_status )
+		return wp_trash_post( $post_id );
+	delete_post_meta($post_id, '_wp_trash_meta_status');
+	delete_post_meta($post_id, '_wp_trash_meta_time');
+	$meta = wp_get_attachment_metadata( $post_id );
+	$backup_sizes = get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true );
+	$file = get_attached_file( $post_id );
+	do_action('delete_attachment', $post_id);
+	wp_delete_object_term_relationships($post_id, array('category', 'post_tag'));
+	wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type));
+	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE meta_key = '_thumbnail_id' AND meta_value = %d", $post_id ));
+	$comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ));
+	if ( ! empty($comment_ids) ) {
+		do_action( 'delete_comment', $comment_ids );
+		$in_comment_ids = "'" . implode("', '", $comment_ids) . "'";
+		$wpdb->query( "DELETE FROM $wpdb->comments WHERE comment_ID IN($in_comment_ids)" );
+		do_action( 'deleted_comment', $comment_ids );
+	}
+	$post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id ));
+	if ( !empty($post_meta_ids) ) {
+		do_action( 'delete_postmeta', $post_meta_ids );
+		$in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'";
+		$wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" );
+		do_action( 'deleted_postmeta', $post_meta_ids );
+	}
+	do_action( 'delete_post', $post_id );
+	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $post_id ));
+	do_action( 'deleted_post', $post_id );
+	$uploadpath = wp_upload_dir();
+	if ( ! empty($meta['thumb']) ) {
+		// Don't delete the thumb if another attachment uses it
+		if (! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $meta['thumb'] . '%', $post_id)) ) {
+			$thumbfile = str_replace(basename($file), $meta['thumb'], $file);
+			$thumbfile = apply_filters('wp_delete_file', $thumbfile);
+			@ unlink( path_join($uploadpath['basedir'], $thumbfile) );
+		}
+	}
+	// remove intermediate and backup images if there are any
+	$sizes = apply_filters('intermediate_image_sizes', array('thumbnail', 'medium', 'large'));
+	foreach ( $sizes as $size ) {
+		if ( $intermediate = image_get_intermediate_size($post_id, $size) ) {
+			$intermediate_file = apply_filters('wp_delete_file', $intermediate['path']);
+			@ unlink( path_join($uploadpath['basedir'], $intermediate_file) );
+		}
+	}
+	if ( is_array($backup_sizes) ) {
+		foreach ( $backup_sizes as $size ) {
+			$del_file = path_join( dirname($meta['file']), $size['file'] );
+			$del_file = apply_filters('wp_delete_file', $del_file);
+@ unlink( path_join($uploadpath['basedir'], $del_file) );
+		}
+	}
+	$file = apply_filters('wp_delete_file', $file);
+	if ( ! empty($file) )
+		@ unlink($file);
+	clean_post_cache($post_id);
+	return $post;
+}
+/**
+* Retrieve attachment meta field for attachment ID.
+*
+* @since 2.1.0
+*
+* @param int $post_id Attachment ID
+* @param bool $unfiltered Optional, default is false. If true, filters are not run.
+* @return string|bool Attachment meta field. False on failure.
+*/
+function wp_get_attachment_metadata( $post_id, $unfiltered = false ) {
+	$post_id = (int) $post_id;
+	if ( !$post =& get_post( $post_id ) )
+		return false;
+	$data = get_post_meta( $post->ID, '_wp_attachment_metadata', true );
+	if ( $unfiltered )
+		return $data;
+	return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID );
+}
+/**
+* Update metadata for an attachment.
+*
+* @since 2.1.0
+*
+* @param int $post_id Attachment ID.
+* @param array $data Attachment data.
+* @return int
+*/
+function wp_update_attachment_metadata( $post_id, $data ) {
+	$post_id = (int) $post_id;
+	if ( !$post =& get_post( $post_id ) )
+		return false;
+	$data = apply_filters( 'wp_update_attachment_metadata', $data, $post->ID );
+	return update_post_meta( $post->ID, '_wp_attachment_metadata', $data);
+}
+/**
+* Retrieve the URL for an attachment.
+*
+* @since 2.1.0
+*
+* @param int $post_id Attachment ID.
+* @return string
+*/
+function wp_get_attachment_url( $post_id = 0 ) {
+	$post_id = (int) $post_id;
+	if ( !$post =& get_post( $post_id ) )
+		return false;
+	$url = '';
+	if ( $file = get_post_meta( $post->ID, '_wp_attached_file', true) ) { //Get attached file
+		if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { //Get upload directory
+			if ( 0 === strpos($file, $uploads['basedir']) ) //Check that the upload base exists in the file location
+				$url = str_replace($uploads['basedir'], $uploads['baseurl'], $file); //replace file location with url location
+			elseif ( false !== strpos($file, 'wp-content/uploads') )
+				$url = $uploads['baseurl'] . substr( $file, strpos($file, 'wp-content/uploads') + 18 );
+			else
+				$url = $uploads['baseurl'] . "/$file"; //Its a newly uploaded file, therefor $file is relative to the basedir.
+		}
+	}
+	if ( empty($url) ) //If any of the above options failed, Fallback on the GUID as used pre-2.7, not recomended to rely upon this.
+		$url = get_the_guid( $post->ID );
+	if ( 'attachment' != $post->post_type || empty($url) )
+		return false;
+	return apply_filters( 'wp_get_attachment_url', $url, $post->ID );
+}
+/**
+* Retrieve thumbnail for an attachment.
+*
+* @since 2.1.0
+*
+* @param int $post_id Attachment ID.
+* @return mixed False on failure. Thumbnail file path on success.
+*/
+function wp_get_attachment_thumb_file( $post_id = 0 ) {
+	$post_id = (int) $post_id;
+	if ( !$post =& get_post( $post_id ) )
+		return false;
+	if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) )
+		return false;
+	$file = get_attached_file( $post->ID );
+	if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) )
+		return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID );
+	return false;
+}
+/**
+* Retrieve URL for an attachment thumbnail.
+*
+* @since 2.1.0
+*
+* @param int $post_id Attachment ID
+* @return string|bool False on failure. Thumbnail URL on success.
+*/
+function wp_get_attachment_thumb_url( $post_id = 0 ) {
+	$post_id = (int) $post_id;
+	if ( !$post =& get_post( $post_id ) )
+		return false;
+	if ( !$url = wp_get_attachment_url( $post->ID ) )
+		return false;
+	$sized = image_downsize( $post_id, 'thumbnail' );
+	if ( $sized )
+		return $sized[0];
+	if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
+		return false;
+	$url = str_replace(basename($url), basename($thumb), $url);
+	return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
+}
+/**
+* Check if the attachment is an image.
+*
+* @since 2.1.0
+*
+* @param int $post_id Attachment ID
+* @return bool
+*/
+function wp_attachment_is_image( $post_id = 0 ) {
+	$post_id = (int) $post_id;
+	if ( !$post =& get_post( $post_id ) )
+		return false;
+	if ( !$file = get_attached_file( $post->ID ) )
+		return false;
+	$ext = preg_match('/\.([^.]+)$/', $file, $matches) ? strtolower($matches[1]) : false;
+	$image_exts = array('jpg', 'jpeg', 'gif', 'png');
+	if ( 'image/' == substr($post->post_mime_type, 0, 6) || $ext && 'import' == $post->post_mime_type && in_array($ext, $image_exts) )
+		return true;
+	return false;
+}
+/**
+* Retrieve the icon for a MIME type.
+*
+* @since 2.1.0
+*
+* @param string $mime MIME type
+* @return string|bool
+*/
+function wp_mime_type_icon( $mime = 0 ) {
+	if ( !is_numeric($mime) )
+		$icon = wp_cache_get("mime_type_icon_$mime");
+	if ( empty($icon) ) {
+		$post_id = 0;
+		$post_mimes = array();
+		if ( is_numeric($mime) ) {
+			$mime = (int) $mime;
+			if ( $post =& get_post( $mime ) ) {
+				$post_id = (int) $post->ID;
+				$ext = preg_replace('/^.+?\.([^.]+)$/', '$1', $post->guid);
+				if ( !empty($ext) ) {
+					$post_mimes[] = $ext;
+					if ( $ext_type = wp_ext2type( $ext ) )
+						$post_mimes[] = $ext_type;
+				}
+				$mime = $post->post_mime_type;
+			} else {
+				$mime = 0;
+			}
+		} else {
+			$post_mimes[] = $mime;
+		}
+		$icon_files = wp_cache_get('icon_files');
+		if ( !is_array($icon_files) ) {
+			$icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
+			$icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url('images/crystal') );
+			$dirs = apply_filters( 'icon_dirs', array($icon_dir => $icon_dir_uri) );
+			$icon_files = array();
+			while ( $dirs ) {
+				$dir = array_shift($keys = array_keys($dirs));
+				$uri = array_shift($dirs);
+				if ( $dh = opendir($dir) ) {
+					while ( false !== $file = readdir($dh) ) {
+						$file = basename($file);
+						if ( substr($file, 0, 1) == '.' )
+							continue;
+						if ( !in_array(strtolower(substr($file, -4)), array('.png', '.gif', '.jpg') ) ) {
+							if ( is_dir("$dir/$file") )
+								$dirs["$dir/$file"] = "$uri/$file";
+							continue;
+						}
+						$icon_files["$dir/$file"] = "$uri/$file";
+					}
+					closedir($dh);
+				}
+			}
+			wp_cache_set('icon_files', $icon_files, 600);
+		}
+		// Icon basename - extension = MIME wildcard
+		foreach ( $icon_files as $file => $uri )
+			$types[ preg_replace('/^([^.]*).*$/', '$1', basename($file)) ] =& $icon_files[$file];
+		if ( ! empty($mime) ) {
+			$post_mimes[] = substr($mime, 0, strpos($mime, '/'));
+			$post_mimes[] = substr($mime, strpos($mime, '/') + 1);
+			$post_mimes[] = str_replace('/', '_', $mime);
+		}
+		$matches = wp_match_mime_types(array_keys($types), $post_mimes);
+		$matches['default'] = array('default');
+		foreach ( $matches as $match => $wilds ) {
+			if ( isset($types[$wilds[0]])) {
+				$icon = $types[$wilds[0]];
+				if ( !is_numeric($mime) )
+					wp_cache_set("mime_type_icon_$mime", $icon);
+				break;
+			}
+		}
+	}
+	return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id ); // Last arg is 0 if function pass mime type.
+}
+/**
+* Checked for changed slugs for published posts and save old slug.
+*
+* The function is used along with form POST data. It checks for the wp-old-slug
+* POST field. Will only be concerned with published posts and the slug actually
+* changing.
+*
+* If the slug was changed and not already part of the old slugs then it will be
+* added to the post meta field ('_wp_old_slug') for storing old slugs for that
+* post.
+*
+* The most logically usage of this function is redirecting changed posts, so
+* that those that linked to an changed post will be redirected to the new post.
+*
+* @since 2.1.0
+*
+* @param int $post_id Post ID.
+* @return int Same as $post_id
+*/
+function wp_check_for_changed_slugs($post_id) {
+	if ( !isset($_POST['wp-old-slug']) || !strlen($_POST['wp-old-slug']) )
+		return $post_id;
+	$post = &get_post($post_id);
+	// we're only concerned with published posts
+	if ( $post->post_status != 'publish' || $post->post_type != 'post' )
+		return $post_id;
+	// only bother if the slug has changed
+	if ( $post->post_name == $_POST['wp-old-slug'] )
+		return $post_id;
+	$old_slugs = (array) get_post_meta($post_id, '_wp_old_slug');
+	// if we haven't added this old slug before, add it now
+	if ( !count($old_slugs) || !in_array($_POST['wp-old-slug'], $old_slugs) )
+		add_post_meta($post_id, '_wp_old_slug', $_POST['wp-old-slug']);
+	// if the new slug was used previously, delete it from the list
+	if ( in_array($post->post_name, $old_slugs) )
+		delete_post_meta($post_id, '_wp_old_slug', $post->post_name);
+	return $post_id;
+}
+/**
+* Retrieve the private post SQL based on capability.
+*
+* This function provides a standardized way to appropriately select on the
+* post_status of posts/pages. The function will return a piece of SQL code that
+* can be added to a WHERE clause; this SQL is constructed to allow all
+* published posts, and all private posts to which the user has access.
+*
+* It also allows plugins that define their own post type to control the cap by
+* using the hook 'pub_priv_sql_capability'. The plugin is expected to return
+* the capability the user must have to read the private post type.
+*
+* @since 2.2.0
+*
+* @uses $user_ID
+* @uses apply_filters() Call 'pub_priv_sql_capability' filter for plugins with different post types.
+*
+* @param string $post_type currently only supports 'post' or 'page'.
+* @return string SQL code that can be added to a where clause.
+*/
+function get_private_posts_cap_sql($post_type) {
+	global $user_ID;
+	$cap = '';
+	// Private posts
+	if ($post_type == 'post') {
+		$cap = 'read_private_posts';
+	// Private pages
+	} elseif ($post_type == 'page') {
+		$cap = 'read_private_pages';
+	// Dunno what it is, maybe plugins have their own post type?
+	} else {
+		$cap = apply_filters('pub_priv_sql_capability', $cap);
+		if (empty($cap)) {
+			// We don't know what it is, filters don't change anything,
+			// so set the SQL up to return nothing.
+			return '1 = 0';
+		}
+	}
+	$sql = '(post_status = \'publish\'';
+	if (current_user_can($cap)) {
+		// Does the user have the capability to view private posts? Guess so.
+		$sql .= ' OR post_status = \'private\'';
+	} elseif (is_user_logged_in()) {
+		// Users can view their own private posts.
+		$sql .= ' OR post_status = \'private\' AND post_author = \'' . $user_ID . '\'';
+	}
+	$sql .= ')';
+	return $sql;
+}
+/**
+* Retrieve the date the the last post was published.
+*
+* The server timezone is the default and is the difference between GMT and
+* server time. The 'blog' value is the date when the last post was posted. The
+* 'gmt' is when the last post was posted in GMT formatted date.
+*
+* @since 0.71
+*
+* @uses $wpdb
+* @uses $blog_id
+* @uses apply_filters() Calls 'get_lastpostdate' filter
+*
+* @global mixed $cache_lastpostdate Stores the last post date
+* @global mixed $pagenow The current page being viewed
+*
+* @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
+* @return string The date of the last post.
+*/
+function get_lastpostdate($timezone = 'server') {
+	global $cache_lastpostdate, $wpdb, $blog_id;
+	$add_seconds_server = date('Z');
+	if ( !isset($cache_lastpostdate[$blog_id][$timezone]) ) {
+		switch(strtolower($timezone)) {
+			case 'gmt':
+				$lastpostdate = $wpdb->get_var("SELECT post_date_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_date_gmt DESC LIMIT 1");
+				break;
+			case 'blog':
+				$lastpostdate = $wpdb->get_var("SELECT post_date FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_date_gmt DESC LIMIT 1");
+				break;
+			case 'server':
+				$lastpostdate = $wpdb->get_var("SELECT DATE_ADD(post_date_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_date_gmt DESC LIMIT 1");
+				break;
+		}
+		$cache_lastpostdate[$blog_id][$timezone] = $lastpostdate;
+	} else {
+		$lastpostdate = $cache_lastpostdate[$blog_id][$timezone];
+	}
+	return apply_filters( 'get_lastpostdate', $lastpostdate, $timezone );
+}
+/**
+* Retrieve last post modified date depending on timezone.
+*
+* The server timezone is the default and is the difference between GMT and
+* server time. The 'blog' value is just when the last post was modified. The
+* 'gmt' is when the last post was modified in GMT time.
+*
+* @since 1.2.0
+* @uses $wpdb
+* @uses $blog_id
+* @uses apply_filters() Calls 'get_lastpostmodified' filter
+*
+* @global mixed $cache_lastpostmodified Stores the date the last post was modified
+*
+* @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
+* @return string The date the post was last modified.
+*/
+function get_lastpostmodified($timezone = 'server') {
+	global $cache_lastpostmodified, $wpdb, $blog_id;
+	$add_seconds_server = date('Z');
+	if ( !isset($cache_lastpostmodified[$blog_id][$timezone]) ) {
+		switch(strtolower($timezone)) {
+			case 'gmt':
+				$lastpostmodified = $wpdb->get_var("SELECT post_modified_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
+				break;
+			case 'blog':
+				$lastpostmodified = $wpdb->get_var("SELECT post_modified FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
+				break;
+			case 'server':
+				$lastpostmodified = $wpdb->get_var("SELECT DATE_ADD(post_modified_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
+				break;
+		}
+		$lastpostdate = get_lastpostdate($timezone);
+		if ( $lastpostdate > $lastpostmodified ) {
+			$lastpostmodified = $lastpostdate;
+		}
+		$cache_lastpostmodified[$blog_id][$timezone] = $lastpostmodified;
+	} else {
+		$lastpostmodified = $cache_lastpostmodified[$blog_id][$timezone];
+	}
+	return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
+}
+/**
+* Updates posts in cache.
+*
+* @usedby update_page_cache() Aliased by this function.
+*
+* @package WordPress
+* @subpackage Cache
+* @since 1.5.1
+*
+* @param array $posts Array of post objects
+*/
+function update_post_cache(&$posts) {
+	if ( !$posts )
+		return;
+	foreach ( $posts as $post )
+		wp_cache_add($post->ID, $post, 'posts');
+}
+/**
+* Will clean the post in the cache.
+*
+* Cleaning means delete from the cache of the post. Will call to clean the term
+* object cache associated with the post ID.
+*
+* clean_post_cache() will call itself recursively for each child post.
+*
+* This function not run if $_wp_suspend_cache_invalidation is not empty. See
+* wp_suspend_cache_invalidation().
+*
+* @package WordPress
+* @subpackage Cache
+* @since 2.0.0
+*
+* @uses do_action() Calls 'clean_post_cache' on $id before adding children (if any).
+*
+* @param int $id The Post ID in the cache to clean
+*/
+function clean_post_cache($id) {
+	global $_wp_suspend_cache_invalidation, $wpdb;
+	if ( !empty($_wp_suspend_cache_invalidation) )
+		return;
+	$id = (int) $id;
+	wp_cache_delete($id, 'posts');
+	wp_cache_delete($id, 'post_meta');
+	clean_object_term_cache($id, 'post');
+	wp_cache_delete( 'wp_get_archives', 'general' );
+	do_action('clean_post_cache', $id);
+	if ( $children = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_parent = %d", $id) ) ) {
+		foreach( $children as $cid )
+			clean_post_cache( $cid );
+	}
+}
+/**
+* Alias of update_post_cache().
+*
+* @see update_post_cache() Posts and pages are the same, alias is intentional
+*
+* @package WordPress
+* @subpackage Cache
+* @since 1.5.1
+*
+* @param array $pages list of page objects
+*/
+function update_page_cache(&$pages) {
+	update_post_cache($pages);
+}
+/**
+* Will clean the page in the cache.
+*
+* Clean (read: delete) page from cache that matches $id. Will also clean cache
+* associated with 'all_page_ids' and 'get_pages'.
+*
+* @package WordPress
+* @subpackage Cache
+* @since 2.0.0
+*
+* @uses do_action() Will call the 'clean_page_cache' hook action.
+*
+* @param int $id Page ID to clean
+*/
+function clean_page_cache($id) {
+	clean_post_cache($id);
+	wp_cache_delete( 'all_page_ids', 'posts' );
+	wp_cache_delete( 'get_pages', 'posts' );
+	do_action('clean_page_cache', $id);
+}
+/**
+* Call major cache updating functions for list of Post objects.
+*
+* @package WordPress
+* @subpackage Cache
+* @since 1.5.0
+*
+* @uses $wpdb
+* @uses update_post_cache()
+* @uses update_object_term_cache()
+* @uses update_postmeta_cache()
+*
+* @param array $posts Array of Post objects
+*/
+function update_post_caches(&$posts) {
+	// No point in doing all this work if we didn't match any posts.
+	if ( !$posts )
+		return;
+	update_post_cache($posts);
+	$post_ids = array();
+	for ($i = 0; $i < count($posts); $i++)
+		$post_ids[] = $posts[$i]->ID;
+	update_object_term_cache($post_ids, 'post');
+	update_postmeta_cache($post_ids);
+}
+/**
+* Updates metadata cache for list of post IDs.
+*
+* Performs SQL query to retrieve the metadata for the post IDs and updates the
+* metadata cache for the posts. Therefore, the functions, which call this
+* function, do not need to perform SQL queries on their own.
+*
+* @package WordPress
+* @subpackage Cache
+* @since 2.1.0
+*
+* @uses $wpdb
+*
+* @param array $post_ids List of post IDs.
+* @return bool|array Returns false if there is nothing to update or an array of metadata.
+*/
+function update_postmeta_cache($post_ids) {
+	return update_meta_cache('post', $post_ids);
+}
+//
+// Hooks
+//
+/**
+* Hook for managing future post transitions to published.
+*
+* @since 2.3.0
+* @access private
+* @uses $wpdb
+* @uses do_action() Calls 'private_to_published' on post ID if this is a 'private_to_published' call.
+* @uses wp_clear_scheduled_hook() with 'publish_future_post' and post ID.
+*
+* @param string $new_status New post status
+* @param string $old_status Previous post status
+* @param object $post Object type containing the post information
+*/
+function _transition_post_status($new_status, $old_status, $post) {
+	global $wpdb;
+	if ( $old_status != 'publish' && $new_status == 'publish' ) {
+		// Reset GUID if transitioning to publish and it is empty
+		if ( '' == get_the_guid($post->ID) )
+			$wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
+		do_action('private_to_published', $post->ID);  // Deprecated, use private_to_publish
+	}
+	// Always clears the hook in case the post status bounced from future to draft.
+	wp_clear_scheduled_hook('publish_future_post', $post->ID);
+}
+/**
+* Hook used to schedule publication for a post marked for the future.
+*
+* The $post properties used and must exist are 'ID' and 'post_date_gmt'.
+*
+* @since 2.3.0
+* @access private
+*
+* @param int $deprecated Not Used. Can be set to null.
+* @param object $post Object type containing the post information
+*/
+function _future_post_hook($deprecated = '', $post) {
+	wp_clear_scheduled_hook( 'publish_future_post', $post->ID );
+	wp_schedule_single_event(strtotime($post->post_date_gmt. ' GMT'), 'publish_future_post', array($post->ID));
+}
+/**
+* Hook to schedule pings and enclosures when a post is published.
+*
+* @since 2.3.0
+* @access private
+* @uses $wpdb
+* @uses XMLRPC_REQUEST and APP_REQUEST constants.
+* @uses do_action() Calls 'xmlprc_publish_post' on post ID if XMLRPC_REQUEST is defined.
+* @uses do_action() Calls 'app_publish_post' on post ID if APP_REQUEST is defined.
+*
+* @param int $post_id The ID in the database table of the post being published
+*/
+function _publish_post_hook($post_id) {
+	global $wpdb;
+	if ( defined('XMLRPC_REQUEST') )
+		do_action('xmlrpc_publish_post', $post_id);
+	if ( defined('APP_REQUEST') )
+		do_action('app_publish_post', $post_id);
+	if ( defined('WP_IMPORTING') )
+		return;
+	$data = array( 'post_id' => $post_id, 'meta_value' => '1' );
+	if ( get_option('default_pingback_flag') ) {
+		$wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_pingme' ) );
+		do_action( 'added_postmeta', $wpdb->insert_id, $post_id, '_pingme', 1 );
+	}
+	$wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_encloseme' ) );
+	do_action( 'added_postmeta', $wpdb->insert_id, $post_id, '_encloseme', 1 );
+	wp_schedule_single_event(time(), 'do_pings');
+}
+/**
+* Hook used to prevent page/post cache and rewrite rules from staying dirty.
+*
+* Does two things. If the post is a page and has a template then it will
+* update/add that template to the meta. For both pages and posts, it will clean
+* the post cache to make sure that the cache updates to the changes done
+* recently. For pages, the rewrite rules of WordPress are flushed to allow for
+* any changes.
+*
+* The $post parameter, only uses 'post_type' property and 'page_template'
+* property.
+*
+* @since 2.3.0
+* @access private
+* @uses $wp_rewrite Flushes Rewrite Rules.
+*
+* @param int $post_id The ID in the database table for the $post
+* @param object $post Object type containing the post information
+*/
+function _save_post_hook($post_id, $post) {
+	if ( $post->post_type == 'page' ) {
+		clean_page_cache($post_id);
+		// Avoid flushing rules for every post during import.
+		if ( !defined('WP_IMPORTING') ) {
+			global $wp_rewrite;
+			$wp_rewrite->flush_rules(false);
+		}
+	} else {
+		clean_post_cache($post_id);
+	}
+}
+/**
+* Retrieve post ancestors and append to post ancestors property.
+*
+* Will only retrieve ancestors once, if property is already set, then nothing
+* will be done. If there is not a parent post, or post ID and post parent ID
+* are the same then nothing will be done.
+*
+* The parameter is passed by reference, so nothing needs to be returned. The
+* property will be updated and can be referenced after the function is
+* complete. The post parent will be an ancestor and the parent of the post
+* parent will be an ancestor. There will only be two ancestors at the most.
+*
+* @since unknown
+* @access private
+* @uses $wpdb
+*
+* @param object $_post Post data.
+* @return null When nothing needs to be done.
+*/
+function _get_post_ancestors(&$_post) {
+	global $wpdb;
+	if ( isset($_post->ancestors) )
+		return;
+	$_post->ancestors = array();
+	if ( empty($_post->post_parent) || $_post->ID == $_post->post_parent )
+		return;
+	$id = $_post->ancestors[] = $_post->post_parent;
+	while ( $ancestor = $wpdb->get_var( $wpdb->prepare("SELECT `post_parent` FROM $wpdb->posts WHERE ID = %d LIMIT 1", $id) ) ) {
+		if ( $id == $ancestor )
+			break;
+		$id = $_post->ancestors[] = $ancestor;
+	}
+}
+/**
+* Determines which fields of posts are to be saved in revisions.
+*
+* Does two things. If passed a post *array*, it will return a post array ready
+* to be insterted into the posts table as a post revision. Otherwise, returns
+* an array whose keys are the post fields to be saved for post revisions.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+* @access private
+* @uses apply_filters() Calls '_wp_post_revision_fields' on 'title', 'content' and 'excerpt' fields.
+*
+* @param array $post Optional a post array to be processed for insertion as a post revision.
+* @param bool $autosave optional Is the revision an autosave?
+* @return array Post array ready to be inserted as a post revision or array of fields that can be versioned.
+*/
+function _wp_post_revision_fields( $post = null, $autosave = false ) {
+	static $fields = false;
+	if ( !$fields ) {
+		// Allow these to be versioned
+		$fields = array(
+			'post_title' => __( 'Title' ),
+			'post_content' => __( 'Content' ),
+			'post_excerpt' => __( 'Excerpt' ),
+		);
+		// Runs only once
+		$fields = apply_filters( '_wp_post_revision_fields', $fields );
+		// WP uses these internally either in versioning or elsewhere - they cannot be versioned
+		foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect )
+			unset( $fields[$protect] );
+	}
+	if ( !is_array($post) )
+		return $fields;
+	$return = array();
+	foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field )
+		$return[$field] = $post[$field];
+	$return['post_parent']   = $post['ID'];
+	$return['post_status']   = 'inherit';
+	$return['post_type']     = 'revision';
+	$return['post_name']     = $autosave ? "$post[ID]-autosave" : "$post[ID]-revision";
+	$return['post_date']     = isset($post['post_modified']) ? $post['post_modified'] : '';
+	$return['post_date_gmt'] = isset($post['post_modified_gmt']) ? $post['post_modified_gmt'] : '';
+	return $return;
+}
+/**
+* Saves an already existing post as a post revision.
+*
+* Typically used immediately prior to post updates.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @uses _wp_put_post_revision()
+*
+* @param int $post_id The ID of the post to save as a revision.
+* @return mixed Null or 0 if error, new revision ID, if success.
+*/
+function wp_save_post_revision( $post_id ) {
+	// We do autosaves manually with wp_create_post_autosave()
+	if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
+		return;
+	// WP_POST_REVISIONS = 0, false
+	if ( !constant('WP_POST_REVISIONS') )
+		return;
+	if ( !$post = get_post( $post_id, ARRAY_A ) )
+		return;
+	if ( !in_array( $post['post_type'], array( 'post', 'page' ) ) )
+		return;
+	$return = _wp_put_post_revision( $post );
+	// WP_POST_REVISIONS = true (default), -1
+	if ( !is_numeric( WP_POST_REVISIONS ) || WP_POST_REVISIONS < 0 )
+		return $return;
+	// all revisions and (possibly) one autosave
+	$revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) );
+	// WP_POST_REVISIONS = (int) (# of autasaves to save)
+	$delete = count($revisions) - WP_POST_REVISIONS;
+	if ( $delete < 1 )
+		return $return;
+	$revisions = array_slice( $revisions, 0, $delete );
+	for ( $i = 0; isset($revisions[$i]); $i++ ) {
+		if ( false !== strpos( $revisions[$i]->post_name, 'autosave' ) )
+			continue;
+		wp_delete_post_revision( $revisions[$i]->ID );
+	}
+	return $return;
+}
+/**
+* Retrieve the autosaved data of the specified post.
+*
+* Returns a post object containing the information that was autosaved for the
+* specified post.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @param int $post_id The post ID.
+* @return object|bool The autosaved data or false on failure or when no autosave exists.
+*/
+function wp_get_post_autosave( $post_id ) {
+	if ( !$post = get_post( $post_id ) )
+		return false;
+	$q = array(
+		'name' => "{$post->ID}-autosave",
+		'post_parent' => $post->ID,
+		'post_type' => 'revision',
+		'post_status' => 'inherit'
+	);
+	// Use WP_Query so that the result gets cached
+	$autosave_query = new WP_Query;
+	add_action( 'parse_query', '_wp_get_post_autosave_hack' );
+	$autosave = $autosave_query->query( $q );
+	remove_action( 'parse_query', '_wp_get_post_autosave_hack' );
+	if ( $autosave && is_array($autosave) && is_object($autosave[0]) )
+		return $autosave[0];
+	return false;
+}
+/**
+* Internally used to hack WP_Query into submission.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @param object $query WP_Query object
+*/
+function _wp_get_post_autosave_hack( $query ) {
+	$query->is_single = false;
+}
+/**
+* Determines if the specified post is a revision.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @param int|object $post Post ID or post object.
+* @return bool|int False if not a revision, ID of revision's parent otherwise.
+*/
+function wp_is_post_revision( $post ) {
+	if ( !$post = wp_get_post_revision( $post ) )
+		return false;
+	return (int) $post->post_parent;
+}
+/**
+* Determines if the specified post is an autosave.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @param int|object $post Post ID or post object.
+* @return bool|int False if not a revision, ID of autosave's parent otherwise
+*/
+function wp_is_post_autosave( $post ) {
+	if ( !$post = wp_get_post_revision( $post ) )
+		return false;
+	if ( "{$post->post_parent}-autosave" !== $post->post_name )
+		return false;
+	return (int) $post->post_parent;
+}
+/**
+* Inserts post data into the posts table as a post revision.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @uses wp_insert_post()
+*
+* @param int|object|array $post Post ID, post object OR post array.
+* @param bool $autosave Optional. Is the revision an autosave?
+* @return mixed Null or 0 if error, new revision ID if success.
+*/
+function _wp_put_post_revision( $post = null, $autosave = false ) {
+	if ( is_object($post) )
+		$post = get_object_vars( $post );
+	elseif ( !is_array($post) )
+		$post = get_post($post, ARRAY_A);
+	if ( !$post || empty($post['ID']) )
+		return;
+	if ( isset($post['post_type']) && 'revision' == $post['post_type'] )
+		return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
+	$post = _wp_post_revision_fields( $post, $autosave );
+	$post = add_magic_quotes($post); //since data is from db
+	$revision_id = wp_insert_post( $post );
+	if ( is_wp_error($revision_id) )
+		return $revision_id;
+	if ( $revision_id )
+		do_action( '_wp_put_post_revision', $revision_id );
+	return $revision_id;
+}
+/**
+* Gets a post revision.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @uses get_post()
+*
+* @param int|object $post Post ID or post object
+* @param string $output Optional. OBJECT, ARRAY_A, or ARRAY_N.
+* @param string $filter Optional sanitation filter.  @see sanitize_post()
+* @return mixed Null if error or post object if success
+*/
+function &wp_get_post_revision(&$post, $output = OBJECT, $filter = 'raw') {
+	$null = null;
+	if ( !$revision = get_post( $post, OBJECT, $filter ) )
+		return $revision;
+	if ( 'revision' !== $revision->post_type )
+		return $null;
+	if ( $output == OBJECT ) {
+		return $revision;
+	} elseif ( $output == ARRAY_A ) {
+		$_revision = get_object_vars($revision);
+		return $_revision;
+	} elseif ( $output == ARRAY_N ) {
+		$_revision = array_values(get_object_vars($revision));
+		return $_revision;
+	}
+	return $revision;
+}
+/**
+* Restores a post to the specified revision.
+*
+* Can restore a past revision using all fields of the post revision, or only selected fields.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @uses wp_get_post_revision()
+* @uses wp_update_post()
+* @uses do_action() Calls 'wp_restore_post_revision' on post ID and revision ID if wp_update_post()
+*  is successful.
+*
+* @param int|object $revision_id Revision ID or revision object.
+* @param array $fields Optional. What fields to restore from. Defaults to all.
+* @return mixed Null if error, false if no fields to restore, (int) post ID if success.
+*/
+function wp_restore_post_revision( $revision_id, $fields = null ) {
+	if ( !$revision = wp_get_post_revision( $revision_id, ARRAY_A ) )
+		return $revision;
+	if ( !is_array( $fields ) )
+		$fields = array_keys( _wp_post_revision_fields() );
+	$update = array();
+	foreach( array_intersect( array_keys( $revision ), $fields ) as $field )
+		$update[$field] = $revision[$field];
+	if ( !$update )
+		return false;
+	$update['ID'] = $revision['post_parent'];
+	$update = add_magic_quotes( $update ); //since data is from db
+	$post_id = wp_update_post( $update );
+	if ( is_wp_error( $post_id ) )
+		return $post_id;
+	if ( $post_id )
+		do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] );
+	return $post_id;
+}
+/**
+* Deletes a revision.
+*
+* Deletes the row from the posts table corresponding to the specified revision.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @uses wp_get_post_revision()
+* @uses wp_delete_post()
+*
+* @param int|object $revision_id Revision ID or revision object.
+* @param array $fields Optional. What fields to restore from.  Defaults to all.
+* @return mixed Null if error, false if no fields to restore, (int) post ID if success.
+*/
+function wp_delete_post_revision( $revision_id ) {
+	if ( !$revision = wp_get_post_revision( $revision_id ) )
+		return $revision;
+	$delete = wp_delete_post( $revision->ID );
+	if ( is_wp_error( $delete ) )
+		return $delete;
+	if ( $delete )
+		do_action( 'wp_delete_post_revision', $revision->ID, $revision );
+	return $delete;
+}
+/**
+* Returns all revisions of specified post.
+*
+* @package WordPress
+* @subpackage Post_Revisions
+* @since 2.6.0
+*
+* @uses get_children()
+*
+* @param int|object $post_id Post ID or post object
+* @return array empty if no revisions
+*/
+function wp_get_post_revisions( $post_id = 0, $args = null ) {
+	if ( !constant('WP_POST_REVISIONS') )
+		return array();
+	if ( ( !$post = get_post( $post_id ) ) || empty( $post->ID ) )
+		return array();
+	$defaults = array( 'order' => 'DESC', 'orderby' => 'date' );
+	$args = wp_parse_args( $args, $defaults );
+	$args = array_merge( $args, array( 'post_parent' => $post->ID, 'post_type' => 'revision', 'post_status' => 'inherit' ) );
+	if ( !$revisions = get_children( $args ) )
+		return array();
+	return $revisions;
+}
+function _set_preview($post) {
+	if ( ! is_object($post) )
+		return $post;
+	$preview = wp_get_post_autosave($post->ID);
+	if ( ! is_object($preview) )
+		return $post;
+	$preview = sanitize_post($preview);
+	$post->post_content = $preview->post_content;
+	$post->post_title = $preview->post_title;
+	$post->post_excerpt = $preview->post_excerpt;
+	return $post;
+}
+function _show_post_preview() {
+	if ( isset($_GET['preview_id']) && isset($_GET['preview_nonce']) ) {
+		$id = (int) $_GET['preview_id'];
+		if ( false == wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . $id ) )
+			wp_die( __('You do not have permission to preview drafts.') );
+		add_filter('the_preview', '_set_preview');
+	}
+}

changeset 136	bde1974c263b
child 194	32102edaa81b