Attachment 587770 Details for Bug 826623 – The offending PHP file

The offending PHP file

post.php (text/plain), 168.33 KB, created by Adam Williamson on 2012-05-30 15:52:51 UTC

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Creator: Adam Williamson

Created: 2012-05-30 15:52:51 UTC

Size: 168.33 KB

patch

obsolete

><?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.
> *
> * @since 2.9.0
> */
>function create_initial_post_types() {
>	register_post_type( 'post', array(
>		'labels' => array(
>			'name_admin_bar' => _x( 'Post', 'add new on admin bar' ),
>		),
>		'public' => true,
>		'_builtin' => true, /* internal use only. don't use this when registering your own post type. */
>		'_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
>		'capability_type' => 'post',
>		'map_meta_cap' => true,
>		'hierarchical' => false,
>		'rewrite' => false,
>		'query_var' => false,
>		'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'post-formats' ),
>	) );
>
>	register_post_type( 'page', array(
>		'labels' => array(
>			'name_admin_bar' => _x( 'Page', 'add new on admin bar' ),
>		),
>		'public' => true,
>		'publicly_queryable' => false,
>		'_builtin' => true, /* internal use only. don't use this when registering your own post type. */
>		'_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
>		'capability_type' => 'page',
>		'map_meta_cap' => true,
>		'hierarchical' => true,
>		'rewrite' => false,
>		'query_var' => false,
>		'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'page-attributes', 'custom-fields', 'comments', 'revisions' ),
>	) );
>
>	register_post_type( 'attachment', array(
>		'labels' => array(
>			'name' => __( 'Media' ),
>			'edit_item' => __( 'Edit Media' ),
>		),
>		'public' => true,
>		'show_ui' => false,
>		'_builtin' => true, /* internal use only. don't use this when registering your own post type. */
>		'_edit_link' => 'media.php?attachment_id=%d', /* internal use only. don't use this when registering your own post type. */
>		'capability_type' => 'post',
>		'map_meta_cap' => true,
>		'hierarchical' => false,
>		'rewrite' => false,
>		'query_var' => false,
>		'show_in_nav_menus' => false,
>		'supports' => array( 'comments' ),
>	) );
>
>	register_post_type( 'revision', array(
>		'labels' => array(
>			'name' => __( 'Revisions' ),
>			'singular_name' => __( 'Revision' ),
>		),
>		'public' => false,
>		'_builtin' => true, /* internal use only. don't use this when registering your own post type. */
>		'_edit_link' => 'revision.php?revision=%d', /* internal use only. don't use this when registering your own post type. */
>		'capability_type' => 'post',
>		'map_meta_cap' => true,
>		'hierarchical' => false,
>		'rewrite' => false,
>		'query_var' => false,
>		'can_export' => false,
>	) );
>
>	register_post_type( 'nav_menu_item', array(
>		'labels' => array(
>			'name' => __( 'Navigation Menu Items' ),
>			'singular_name' => __( 'Navigation Menu Item' ),
>		),
>		'public' => false,
>		'_builtin' => true, /* internal use only. don't use this when registering your own post type. */
>		'hierarchical' => false,
>		'rewrite' => false,
>		'query_var' => false,
>	) );
>
>	register_post_status( 'publish', array(
>		'label' => _x( 'Published', 'post' ),
>		'public' => true,
>		'_builtin' => true, /* internal use only. */
>		'label_count' => _n_noop( 'Published (%s)', 'Published (%s)' ),
>	) );
>
>	register_post_status( 'future', array(
>		'label' => _x( 'Scheduled', 'post' ),
>		'protected' => true,
>		'_builtin' => true, /* internal use only. */
>		'label_count' => _n_noop('Scheduled (%s)', 'Scheduled (%s)' ),
>	) );
>
>	register_post_status( 'draft', array(
>		'label' => _x( 'Draft', 'post' ),
>		'protected' => true,
>		'_builtin' => true, /* internal use only. */
>		'label_count' => _n_noop( 'Draft (%s)', 'Drafts (%s)' ),
>	) );
>
>	register_post_status( 'pending', array(
>		'label' => _x( 'Pending', 'post' ),
>		'protected' => true,
>		'_builtin' => true, /* internal use only. */
>		'label_count' => _n_noop( 'Pending (%s)', 'Pending (%s)' ),
>	) );
>
>	register_post_status( 'private', array(
>		'label' => _x( 'Private', 'post' ),
>		'private' => true,
>		'_builtin' => true, /* internal use only. */
>		'label_count' => _n_noop( 'Private (%s)', 'Private (%s)' ),
>	) );
>
>	register_post_status( 'trash', array(
>		'label' => _x( 'Trash', 'post' ),
>		'internal' => true,
>		'_builtin' => true, /* internal use only. */
>		'label_count' => _n_noop( 'Trash (%s)', 'Trash (%s)' ),
>		'show_in_admin_status_list' => true,
>	) );
>
>	register_post_status( 'auto-draft', array(
>		'label' => 'auto-draft',
>		'internal' => true,
>		'_builtin' => true, /* internal use only. */
>	) );
>
>	register_post_status( 'inherit', array(
>		'label' => 'inherit',
>		'internal' => true,
>		'_builtin' => true, /* internal use only. */
>		'exclude_from_search' => false,
>	) );
>}
>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.
> * @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 2.9.0
> * @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 ().
> *
> * 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></code>. The 'extended' key has the content after the
> * <code></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('//', $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, $_post, 'posts');
>	} elseif ( is_object($post) && 'raw' == $post->filter ) {
>		$_post = $post;
>	} else {
>		if ( is_object($post) )
>			$post_id = $post->ID;
>		else
>			$post_id = $post;
>
>		$post_id = (int) $post_id;
>		if ( ! $_post = wp_cache_get($post_id, 'posts') ) {
>			$_post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post_id));
>			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', 'post_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 format slug for a post
> *
> * @since 3.1.0
> *
> * @param int|object $post A post
> *
> * @return mixed The format if successful. False if no format is set. WP_Error if errors.
> */
>function get_post_format( $post = null ) {
>	$post = get_post($post);
>
>	if ( ! post_type_supports( $post->post_type, 'post-formats' ) )
>		return false;
>
>	$_format = get_the_terms( $post->ID, 'post_format' );
>
>	if ( empty( $_format ) )
>		return false;
>
>	$format = array_shift( $_format );
>
>	return ( str_replace('post-format-', '', $format->slug ) );
>}
>
>/**
> * Check if a post has a particular format
> *
> * @since 3.1.0
> * @uses has_term()
> *
> * @param string $format The format to check for
> * @param object|id $post The post to check. If not supplied, defaults to the current post if used in the loop.
> * @return bool True if the post has the format, false otherwise.
> */
>function has_post_format( $format, $post = null ) {
>	return has_term('post-format-' . sanitize_key($format), 'post_format', $post);
>}
>
>/**
> * Assign a format to a post
> *
> * @since 3.1.0
> *
> * @param int|object $post The post for which to assign a format
> * @param string $format A format to assign. Use an empty string or array to remove all formats from the post.
> * @return mixed WP_Error on error. Array of affected term IDs on success.
> */
>function set_post_format( $post, $format ) {
>	$post = get_post($post);
>
>	if ( empty($post) )
>		return new WP_Error('invalid_post', __('Invalid post'));
>
>	if ( !empty($format) ) {
>		$format = sanitize_key($format);
>		if ( 'standard' == $format || !in_array( $format, array_keys( get_post_format_slugs() ) ) )
>			$format = '';
>		else
>			$format = 'post-format-' . $format;
>	}
>
>	return wp_set_post_terms($post->ID, $format, 'post_format');
>}
>
>/**
> * 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) )
>		return false;
>
>	if ( 'attachment' == $post->post_type ) {
>		if ( 'private' == $post->post_status )
>			return 'private';
>
>		// Unattached attachments are assumed to be published
>		if ( ( 'inherit' == $post->post_status ) && ( 0 == $post->post_parent) )
>			return 'publish';
>
>		// Inherit status from the parent
>		if ( $post->post_parent && ( $post->ID != $post->post_parent ) )
>			return get_post_status($post->post_parent);
>	}
>
>	return $post->post_status;
>}
>
>/**
> * 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;
>}
>
>/**
> * Register a post type. Do not use before init.
> *
> * A simple function for creating or modifying a post status based on the
> * parameters given. The function will accept an array (second optional
> * parameter), along with a string for the post status name.
> *
> *
> * Optional $args contents:
> *
> * label - A descriptive name for the post status marked for translation. Defaults to $post_status.
> * public - Whether posts of this status should be shown in the front end of the site. Defaults to true.
> * exclude_from_search - Whether to exclude posts with this post status from search results. Defaults to false.
> * show_in_admin_all_list - Whether to include posts in the edit listing for their post type
> * show_in_admin_status_list - Show in the list of statuses with post counts at the top of the edit
> * listings, e.g. All (12) | Published (9) | My Custom Status (2) ...
> *
> * Arguments prefixed with an _underscore shouldn't be used by plugins and themes.
> *
> * @package WordPress
> * @subpackage Post
> * @since 3.0.0
> * @uses $wp_post_statuses Inserts new post status object into the list
> *
> * @param string $post_status Name of the post status.
> * @param array|string $args See above description.
> */
>function register_post_status($post_status, $args = array()) {
>	global $wp_post_statuses;
>
>	if (!is_array($wp_post_statuses))
>		$wp_post_statuses = array();
>
>	// Args prefixed with an underscore are reserved for internal use.
>	$defaults = array('label' => false, 'label_count' => false, 'exclude_from_search' => null, '_builtin' => false, '_edit_link' => 'post.php?post=%d', 'capability_type' => 'post', 'hierarchical' => false, 'public' => null, 'internal' => null, 'protected' => null, 'private' => null, 'show_in_admin_all' => null, 'publicly_queryable' => null, 'show_in_admin_status_list' => null, 'show_in_admin_all_list' => null, 'single_view_cap' => null);
>	$args = wp_parse_args($args, $defaults);
>	$args = (object) $args;
>
>	$post_status = sanitize_key($post_status);
>	$args->name = $post_status;
>
>	if ( null === $args->public && null === $args->internal && null === $args->protected && null === $args->private )
>		$args->internal = true;
>
>	if ( null === $args->public )
>		$args->public = false;
>
>	if ( null === $args->private )
>		$args->private = false;
>
>	if ( null === $args->protected )
>		$args->protected = false;
>
>	if ( null === $args->internal )
>		$args->internal = false;
>
>	if ( null === $args->publicly_queryable )
>		$args->publicly_queryable = $args->public;
>
>	if ( null === $args->exclude_from_search )
>		$args->exclude_from_search = $args->internal;
>
>	if ( null === $args->show_in_admin_all_list )
>		$args->show_in_admin_all_list = !$args->internal;
>
>	if ( null === $args->show_in_admin_status_list )
>			$args->show_in_admin_status_list = !$args->internal;
>
>	if ( null === $args->single_view_cap )
>		$args->single_view_cap = $args->public ? '' : 'edit';
>
>	if ( false === $args->label )
>		$args->label = $post_status;
>
>	if ( false === $args->label_count )
>		$args->label_count = array( $args->label, $args->label );
>
>	$wp_post_statuses[$post_status] = $args;
>
>	return $args;
>}
>
>/**
> * Retrieve a post status object by name
> *
> * @package WordPress
> * @subpackage Post
> * @since 3.0.0
> * @uses $wp_post_statuses
> * @see register_post_status
> * @see get_post_statuses
> *
> * @param string $post_status The name of a registered post status
> * @return object A post status object
> */
>function get_post_status_object( $post_status ) {
>	global $wp_post_statuses;
>
>	if ( empty($wp_post_statuses[$post_status]) )
>		return null;
>
>	return $wp_post_statuses[$post_status];
>}
>
>/**
> * Get a list of all registered post status objects.
> *
> * @package WordPress
> * @subpackage Post
> * @since 3.0.0
> * @uses $wp_post_statuses
> * @see register_post_status
> * @see get_post_status_object
> *
> * @param array|string $args An array of key => value arguments to match against the post status objects.
> * @param string $output The type of output to return, either post status 'names' or 'objects'. 'names' is the default.
> * @param string $operator The logical operation to perform. 'or' means only one element
> * from the array needs to match; 'and' means all elements must match. The default is 'and'.
> * @return array A list of post type names or objects
> */
>function get_post_stati( $args = array(), $output = 'names', $operator = 'and' ) {
>	global $wp_post_statuses;
>
>	$field = ('names' == $output) ? 'name' : false;
>
>	return wp_filter_object_list($wp_post_statuses, $args, $operator, $field);
>}
>
>/**
> * Whether the post type is hierarchical.
> *
> * A false return value might also mean that the post type does not exist.
> *
> * @since 3.0.0
> * @see get_post_type_object
> *
> * @param string $post_type Post type name
> * @return bool Whether post type is hierarchical.
> */
>function is_post_type_hierarchical( $post_type ) {
>	if ( ! post_type_exists( $post_type ) )
>		return false;
>
>	$post_type = get_post_type_object( $post_type );
>	return $post_type->hierarchical;
>}
>
>/**
> * Checks if a post type is registered.
> *
> * @since 3.0.0
> * @uses get_post_type_object()
> *
> * @param string $post_type Post type name
> * @return bool Whether post type is registered.
> */
>function post_type_exists( $post_type ) {
>	return (bool) get_post_type_object( $post_type );
>}
>
>/**
> * Retrieve the post type of the current post or of a given post.
> *
> * @since 2.1.0
> *
> * @uses $post The Loop current post global
> *
> * @param mixed $the_post Optional. Post object or post ID.
> * @return bool|string post type or false on failure.
> */
>function get_post_type( $the_post = false ) {
>	global $post;
>
>	if ( false === $the_post )
>		$the_post = $post;
>	elseif ( is_numeric($the_post) )
>		$the_post = get_post($the_post);
>
>	if ( is_object($the_post) )
>		return $the_post->post_type;
>
>	return false;
>}
>
>/**
> * Retrieve a post type object by name
> *
> * @package WordPress
> * @subpackage Post
> * @since 3.0.0
> * @uses $wp_post_types
> * @see register_post_type
> * @see get_post_types
> *
> * @param string $post_type The name of a registered post type
> * @return object A post type object
> */
>function get_post_type_object( $post_type ) {
>	global $wp_post_types;
>
>	if ( empty($wp_post_types[$post_type]) )
>		return null;
>
>	return $wp_post_types[$post_type];
>}
>
>/**
> * 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
> *
> * @param array|string $args An array of key => value arguments to match against the post type objects.
> * @param string $output The type of output to return, either post type 'names' or 'objects'. 'names' is the default.
> * @param string $operator The logical operation to perform. 'or' means only one element
> * from the array needs to match; 'and' means all elements must match. The default is 'and'.
> * @return array A list of post type names or objects
> */
>function get_post_types( $args = array(), $output = 'names', $operator = 'and' ) {
>	global $wp_post_types;
>
>	$field = ('names' == $output) ? 'name' : false;
>
>	return wp_filter_object_list($wp_post_types, $args, $operator, $field);
>}
>
>/**
> * Register a post type. Do not use before init.
> *
> * A 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:
> *
> * - label - Name of the post type shown in the menu. Usually plural. If not set, labels['name'] will be used.
> * - description - A short descriptive summary of what the post type is. Defaults to blank.
> * - public - Whether posts of this type should be shown in the admin UI. Defaults to false.
> * - exclude_from_search - Whether to exclude posts with this post type from search results.
> * Defaults to true if the type is not public, false if the type is public.
> * - publicly_queryable - Whether post_type queries can be performed from the front page.
> * Defaults to whatever public is set as.
> * - show_ui - Whether to generate a default UI for managing this post type. Defaults to true
> * if the type is public, false if the type is not public.
> * - show_in_menu - Where to show the post type in the admin menu. True for a top level menu,
> * false for no menu, or can be a top level page like 'tools.php' or 'edit.php?post_type=page'.
> * show_ui must be true.
> * - menu_position - The position in the menu order the post type should appear. Defaults to the bottom.
> * - menu_icon - The url to the icon to be used for this menu. Defaults to use the posts icon.
> * - capability_type - The string to use to build the read, edit, and delete capabilities. Defaults to 'post'.
> * May be passed as an array to allow for alternative plurals when using this argument as a base to construct the
> * capabilities, e.g. array('story', 'stories').
> * - capabilities - Array of capabilities for this post type. By default the capability_type is used
> * as a base to construct capabilities. You can see accepted values in {@link get_post_type_capabilities()}.
> * - map_meta_cap - Whether to use the internal default meta capability handling. Defaults to false.
> * - hierarchical - Whether the post type is hierarchical. Defaults to false.
> * - supports - An alias for calling add_post_type_support() directly. See {@link add_post_type_support()}
> * for documentation. Defaults to none.
> * - register_meta_box_cb - Provide a callback function that will be called when setting up the
> * meta boxes for the edit form. Do remove_meta_box() and add_meta_box() calls in the callback.
> * - taxonomies - An array of taxonomy identifiers that will be registered for the post type.
> * Default is no taxonomies. Taxonomies can be registered later with register_taxonomy() or
> * register_taxonomy_for_object_type().
> * - labels - An array of labels for this post type. By default post labels are used for non-hierarchical
> * types and page labels for hierarchical ones. You can see accepted values in {@link get_post_type_labels()}.
> * - permalink_epmask - The default rewrite endpoint bitmasks.
> * - has_archive - True to enable post type archives. Will generate the proper rewrite rules if rewrite is enabled.
> * - rewrite - false to prevent rewrite. Defaults to true. Use array('slug'=>$slug) to customize permastruct;
> * default will use $post_type as slug. Other options include 'with_front', 'feeds', and 'pages'.
> * - query_var - false to prevent queries, or string to value of the query var to use for this post type
> * - can_export - true allows this post type to be exported.
> * - show_in_nav_menus - true makes this post type available for selection in navigation menus.
> * - _builtin - true if this post type is a native or "built-in" post_type. THIS IS FOR INTERNAL USE ONLY!
> * - _edit_link - URL segement to use for edit link of this post type. THIS IS FOR INTERNAL USE ONLY!
> *
> * @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 $args See above description.
> * @return object|WP_Error the registered post type object, or an error object
> */
>function register_post_type($post_type, $args = array()) {
>	global $wp_post_types, $wp_rewrite, $wp;
>
>	if ( !is_array($wp_post_types) )
>		$wp_post_types = array();
>
>	// Args prefixed with an underscore are reserved for internal use.
>	$defaults = array(
>		'labels' => array(), 'description' => '', 'publicly_queryable' => null, 'exclude_from_search' => null,
>		'capability_type' => 'post', 'capabilities' => array(), 'map_meta_cap' => null,
>		'_builtin' => false, '_edit_link' => 'post.php?post=%d', 'hierarchical' => false,
>		'public' => false, 'rewrite' => true, 'has_archive' => false, 'query_var' => true,
>		'supports' => array(), 'register_meta_box_cb' => null,
>		'taxonomies' => array(), 'show_ui' => null, 'menu_position' => null, 'menu_icon' => null,
>		'permalink_epmask' => EP_PERMALINK, 'can_export' => true,
>		'show_in_nav_menus' => null, 'show_in_menu' => null, 'show_in_admin_bar' => null,
>	);
>	$args = wp_parse_args($args, $defaults);
>	$args = (object) $args;
>
>	$post_type = sanitize_key($post_type);
>	$args->name = $post_type;
>
>	if ( strlen( $post_type ) > 20 )
>			return new WP_Error( 'post_type_too_long', __( 'Post types cannot exceed 20 characters in length' ) );
>
>	// If not set, default to the setting for public.
>	if ( null === $args->publicly_queryable )
>		$args->publicly_queryable = $args->public;
>
>	// If not set, default to the setting for public.
>	if ( null === $args->show_ui )
>		$args->show_ui = $args->public;
>
>	// If not set, default to the setting for show_ui.
>	if ( null === $args->show_in_menu || ! $args->show_ui )
>		$args->show_in_menu = $args->show_ui;
>
>	// If not set, default to the whether the full UI is shown.
>	if ( null === $args->show_in_admin_bar )
>		$args->show_in_admin_bar = true === $args->show_in_menu;
>
>	// Whether to show this type in nav-menus.php. Defaults to the setting for public.
>	if ( null === $args->show_in_nav_menus )
>		$args->show_in_nav_menus = $args->public;
>
>	// If not set, default to true if not public, false if public.
>	if ( null === $args->exclude_from_search )
>		$args->exclude_from_search = !$args->public;
>
>	// Back compat with quirky handling in version 3.0. #14122
>	if ( empty( $args->capabilities ) && null === $args->map_meta_cap && in_array( $args->capability_type, array( 'post', 'page' ) ) )
>		$args->map_meta_cap = true;
>
>	if ( null === $args->map_meta_cap )
>		$args->map_meta_cap = false;
>
>	$args->cap = get_post_type_capabilities( $args );
>	unset($args->capabilities);
>
>	if ( is_array( $args->capability_type ) )
>		$args->capability_type = $args->capability_type[0];
>
>	if ( ! empty($args->supports) ) {
>		add_post_type_support($post_type, $args->supports);
>		unset($args->supports);
>	} else {
>		// Add default features
>		add_post_type_support($post_type, array('title', 'editor'));
>	}
>
>	if ( false !== $args->query_var && !empty($wp) ) {
>		if ( true === $args->query_var )
>			$args->query_var = $post_type;
>		$args->query_var = sanitize_title_with_dashes($args->query_var);
>		$wp->add_query_var($args->query_var);
>	}
>
>	if ( false !== $args->rewrite && ( is_admin() || '' != get_option('permalink_structure') ) ) {
>		if ( ! is_array( $args->rewrite ) )
>			$args->rewrite = array();
>		if ( empty( $args->rewrite['slug'] ) )
>			$args->rewrite['slug'] = $post_type;
>		if ( ! isset( $args->rewrite['with_front'] ) )
>			$args->rewrite['with_front'] = true;
>		if ( ! isset( $args->rewrite['pages'] ) )
>			$args->rewrite['pages'] = true;
>		if ( ! isset( $args->rewrite['feeds'] ) || ! $args->has_archive )
>			$args->rewrite['feeds'] = (bool) $args->has_archive;
>
>		if ( $args->hierarchical )
>			$wp_rewrite->add_rewrite_tag("%$post_type%", '(.+?)', $args->query_var ? "{$args->query_var}=" : "post_type=$post_type&name=");
>		else
>			$wp_rewrite->add_rewrite_tag("%$post_type%", '([^/]+)', $args->query_var ? "{$args->query_var}=" : "post_type=$post_type&name=");
>
>		if ( $args->has_archive ) {
>			$archive_slug = $args->has_archive === true ? $args->rewrite['slug'] : $args->has_archive;
>			if ( $args->rewrite['with_front'] )
>				$archive_slug = substr( $wp_rewrite->front, 1 ) . $archive_slug;
>			else
>				$archive_slug = $wp_rewrite->root . $archive_slug;
>
>			$wp_rewrite->add_rule( "{$archive_slug}/?$", "index.php?post_type=$post_type", 'top' );
>			if ( $args->rewrite['feeds'] && $wp_rewrite->feeds ) {
>				$feeds = '(' . trim( implode( '|', $wp_rewrite->feeds ) ) . ')';
>				$wp_rewrite->add_rule( "{$archive_slug}/feed/$feeds/?$", "index.php?post_type=$post_type" . '&feed=$matches[1]', 'top' );
>				$wp_rewrite->add_rule( "{$archive_slug}/$feeds/?$", "index.php?post_type=$post_type" . '&feed=$matches[1]', 'top' );
>			}
>			if ( $args->rewrite['pages'] )
>				$wp_rewrite->add_rule( "{$archive_slug}/{$wp_rewrite->pagination_base}/([0-9]{1,})/?$", "index.php?post_type=$post_type" . '&paged=$matches[1]', 'top' );
>		}
>
>		$wp_rewrite->add_permastruct($post_type, "{$args->rewrite['slug']}/%$post_type%", $args->rewrite['with_front'], $args->permalink_epmask);
>	}
>
>	if ( $args->register_meta_box_cb )
>		add_action('add_meta_boxes_' . $post_type, $args->register_meta_box_cb, 10, 1);
>
>	$args->labels = get_post_type_labels( $args );
>	$args->label = $args->labels->name;
>
>	$wp_post_types[$post_type] = $args;
>
>	add_action( 'future_' . $post_type, '_future_post_hook', 5, 2 );
>
>	foreach ( $args->taxonomies as $taxonomy ) {
>		register_taxonomy_for_object_type( $taxonomy, $post_type );
>	}
>
>	do_action( 'registered_post_type', $post_type, $args );
>
>	return $args;
>}
>
>/**
> * Builds an object with all post type capabilities out of a post type object
> *
> * Post type capabilities use the 'capability_type' argument as a base, if the
> * capability is not set in the 'capabilities' argument array or if the
> * 'capabilities' argument is not supplied.
> *
> * The capability_type argument can optionally be registered as an array, with
> * the first value being singular and the second plural, e.g. array('story, 'stories')
> * Otherwise, an 's' will be added to the value for the plural form. After
> * registration, capability_type will always be a string of the singular value.
> *
> * By default, seven keys are accepted as part of the capabilities array:
> *
> * - edit_post, read_post, and delete_post are meta capabilities, which are then
> * generally mapped to corresponding primitive capabilities depending on the
> * context, which would be the post being edited/read/deleted and the user or
> * role being checked. Thus these capabilities would generally not be granted
> * directly to users or roles.
> *
> * - edit_posts - Controls whether objects of this post type can be edited.
> * - edit_others_posts - Controls whether objects of this type owned by other users
> * can be edited. If the post type does not support an author, then this will
> * behave like edit_posts.
> * - publish_posts - Controls publishing objects of this post type.
> * - read_private_posts - Controls whether private objects can be read.
>
> * These four primitive capabilities are checked in core in various locations.
> * There are also seven other primitive capabilities which are not referenced
> * directly in core, except in map_meta_cap(), which takes the three aforementioned
> * meta capabilities and translates them into one or more primitive capabilities
> * that must then be checked against the user or role, depending on the context.
> *
> * - read - Controls whether objects of this post type can be read.
> * - delete_posts - Controls whether objects of this post type can be deleted.
> * - delete_private_posts - Controls whether private objects can be deleted.
> * - delete_published_posts - Controls whether published objects can be deleted.
> * - delete_others_posts - Controls whether objects owned by other users can be
> * can be deleted. If the post type does not support an author, then this will
> * behave like delete_posts.
> * - edit_private_posts - Controls whether private objects can be edited.
> * - edit_published_posts - Controls whether published objects can be edited.
> *
> * These additional capabilities are only used in map_meta_cap(). Thus, they are
> * only assigned by default if the post type is registered with the 'map_meta_cap'
> * argument set to true (default is false).
> *
> * @see map_meta_cap()
> * @since 3.0.0
> *
> * @param object $args Post type registration arguments
> * @return object object with all the capabilities as member variables
> */
>function get_post_type_capabilities( $args ) {
>	if ( ! is_array( $args->capability_type ) )
>		$args->capability_type = array( $args->capability_type, $args->capability_type . 's' );
>
>	// Singular base for meta capabilities, plural base for primitive capabilities.
>	list( $singular_base, $plural_base ) = $args->capability_type;
>
>	$default_capabilities = array(
>		// Meta capabilities
>		'edit_post' => 'edit_' . $singular_base,
>		'read_post' => 'read_' . $singular_base,
>		'delete_post' => 'delete_' . $singular_base,
>		// Primitive capabilities used outside of map_meta_cap():
>		'edit_posts' => 'edit_' . $plural_base,
>		'edit_others_posts' => 'edit_others_' . $plural_base,
>		'publish_posts' => 'publish_' . $plural_base,
>		'read_private_posts' => 'read_private_' . $plural_base,
>	);
>
>	// Primitive capabilities used within map_meta_cap():
>	if ( $args->map_meta_cap ) {
>		$default_capabilities_for_mapping = array(
>			'read' => 'read',
>			'delete_posts' => 'delete_' . $plural_base,
>			'delete_private_posts' => 'delete_private_' . $plural_base,
>			'delete_published_posts' => 'delete_published_' . $plural_base,
>			'delete_others_posts' => 'delete_others_' . $plural_base,
>			'edit_private_posts' => 'edit_private_' . $plural_base,
>			'edit_published_posts' => 'edit_published_' . $plural_base,
>		);
>		$default_capabilities = array_merge( $default_capabilities, $default_capabilities_for_mapping );
>	}
>
>	$capabilities = array_merge( $default_capabilities, $args->capabilities );
>
>	// Remember meta capabilities for future reference.
>	if ( $args->map_meta_cap )
>		_post_type_meta_capabilities( $capabilities );
>
>	return (object) $capabilities;
>}
>
>/**
> * Stores or returns a list of post type meta caps for map_meta_cap().
> *
> * @since 3.1.0
> * @access private
> */
>function _post_type_meta_capabilities( $capabilities = null ) {
>	static $meta_caps = array();
>	if ( null === $capabilities )
>		return $meta_caps;
>	foreach ( $capabilities as $core => $custom ) {
>		if ( in_array( $core, array( 'read_post', 'delete_post', 'edit_post' ) ) )
>			$meta_caps[ $custom ] = $core;
>	}
>}
>
>/**
> * Builds an object with all post type labels out of a post type object
> *
> * Accepted keys of the label array in the post type object:
> * - name - general name for the post type, usually plural. The same and overridden by $post_type_object->label. Default is Posts/Pages
> * - singular_name - name for one object of this post type. Default is Post/Page
> * - add_new - Default is Add New for both hierarchical and non-hierarchical types. When internationalizing this string, please use a {@link http://codex.wordpress.org/I18n_for_WordPress_Developers#Disambiguation_by_context gettext context} matching your post type. Example: <code>_x('Add New', 'product');</code>
> * - add_new_item - Default is Add New Post/Add New Page
> * - edit_item - Default is Edit Post/Edit Page
> * - new_item - Default is New Post/New Page
> * - view_item - Default is View Post/View Page
> * - search_items - Default is Search Posts/Search Pages
> * - not_found - Default is No posts found/No pages found
> * - not_found_in_trash - Default is No posts found in Trash/No pages found in Trash
> * - parent_item_colon - This string isn't used on non-hierarchical types. In hierarchical ones the default is Parent Page:
> * - all_items - String for the submenu. Default is All Posts/All Pages
> * - menu_name - Default is the same as <code>name</code>
> *
> * Above, the first default value is for non-hierarchical post types (like posts) and the second one is for hierarchical post types (like pages).
> *
> * @since 3.0.0
> * @param object $post_type_object
> * @return object object with all the labels as member variables
> */
>function get_post_type_labels( $post_type_object ) {
>	$nohier_vs_hier_defaults = array(
>		'name' => array( _x('Posts', 'post type general name'), _x('Pages', 'post type general name') ),
>		'singular_name' => array( _x('Post', 'post type singular name'), _x('Page', 'post type singular name') ),
>		'add_new' => array( _x('Add New', 'post'), _x('Add New', 'page') ),
>		'add_new_item' => array( __('Add New Post'), __('Add New Page') ),
>		'edit_item' => array( __('Edit Post'), __('Edit Page') ),
>		'new_item' => array( __('New Post'), __('New Page') ),
>		'view_item' => array( __('View Post'), __('View Page') ),
>		'search_items' => array( __('Search Posts'), __('Search Pages') ),
>		'not_found' => array( __('No posts found.'), __('No pages found.') ),
>		'not_found_in_trash' => array( __('No posts found in Trash.'), __('No pages found in Trash.') ),
>		'parent_item_colon' => array( null, __('Parent Page:') ),
>		'all_items' => array( __( 'All Posts' ), __( 'All Pages' ) )
>	);
>	$nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];
>	return _get_custom_object_labels( $post_type_object, $nohier_vs_hier_defaults );
>}
>
>/**
> * Builds an object with custom-something object (post type, taxonomy) labels out of a custom-something object
> *
> * @access private
> * @since 3.0.0
> */
>function _get_custom_object_labels( $object, $nohier_vs_hier_defaults ) {
>
>	if ( isset( $object->label ) && empty( $object->labels['name'] ) )
>		$object->labels['name'] = $object->label;
>
>	if ( !isset( $object->labels['singular_name'] ) && isset( $object->labels['name'] ) )
>		$object->labels['singular_name'] = $object->labels['name'];
>
>	if ( ! isset( $object->labels['name_admin_bar'] ) )
>		$object->labels['name_admin_bar'] = isset( $object->labels['singular_name'] ) ? $object->labels['singular_name'] : $object->name;
>
>	if ( !isset( $object->labels['menu_name'] ) && isset( $object->labels['name'] ) )
>		$object->labels['menu_name'] = $object->labels['name'];
>
>	if ( !isset( $object->labels['all_items'] ) && isset( $object->labels['menu_name'] ) )
>		$object->labels['all_items'] = $object->labels['menu_name'];
>
>	foreach ( $nohier_vs_hier_defaults as $key => $value )
>			$defaults[$key] = $object->hierarchical ? $value[1] : $value[0];
>
>	$labels = array_merge( $defaults, $object->labels );
>	return (object)$labels;
>}
>
>/**
> * Adds submenus for post types.
> *
> * @access private
> * @since 3.1.0
> */
>function _add_post_type_submenus() {
>	foreach ( get_post_types( array( 'show_ui' => true ) ) as $ptype ) {
>		$ptype_obj = get_post_type_object( $ptype );
>		// Submenus only.
>		if ( ! $ptype_obj->show_in_menu || $ptype_obj->show_in_menu === true )
>			continue;
>		add_submenu_page( $ptype_obj->show_in_menu, $ptype_obj->labels->name, $ptype_obj->labels->all_items, $ptype_obj->cap->edit_posts, "edit.php?post_type=$ptype" );
>	}
>}
>add_action( 'admin_menu', '_add_post_type_submenus' );
>
>/**
> * Register support of certain features for a post type.
> *
> * All features are directly associated with a functional area of the edit screen, such as the
> * editor or a meta box: 'title', 'editor', 'comments', 'revisions', 'trackbacks', 'author',
> * 'excerpt', 'page-attributes', 'thumbnail', and 'custom-fields'.
> *
> * Additionally, the 'revisions' feature dictates whether the post type will store revisions,
> * and the 'comments' feature dictates whether the comments count will show on the edit screen.
> *
> * @since 3.0.0
> * @param string $post_type The post type for which to add the feature
> * @param string|array $feature the feature being added, can be an array of feature strings or a single string
> */
>function add_post_type_support( $post_type, $feature ) {
>	global $_wp_post_type_features;
>
>	$features = (array) $feature;
>	foreach ($features as $feature) {
>		if ( func_num_args() == 2 )
>			$_wp_post_type_features[$post_type][$feature] = true;
>		else
>			$_wp_post_type_features[$post_type][$feature] = array_slice( func_get_args(), 2 );
>	}
>}
>
>/**
> * Remove support for a feature from a post type.
> *
> * @since 3.0.0
> * @param string $post_type The post type for which to remove the feature
> * @param string $feature The feature being removed
> */
>function remove_post_type_support( $post_type, $feature ) {
>	global $_wp_post_type_features;
>
>	if ( !isset($_wp_post_type_features[$post_type]) )
>		return;
>
>	if ( isset($_wp_post_type_features[$post_type][$feature]) )
>		unset($_wp_post_type_features[$post_type][$feature]);
>}
>
>/**
> * Checks a post type's support for a given feature
> *
> * @since 3.0.0
> * @param string $post_type The post type being checked
> * @param string $feature the feature being checked
> * @return boolean
> */
>
>function post_type_supports( $post_type, $feature ) {
>	global $_wp_post_type_features;
>
>	if ( !isset( $_wp_post_type_features[$post_type][$feature] ) )
>		return false;
>
>	// If no args passed then no extra checks need be performed
>	if ( func_num_args() <= 2 )
>		return true;
>
>	// @todo Allow pluggable arg checking
>	//$args = array_slice( func_get_args(), 2 );
>
>	return true;
>}
>
>/**
> * 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 'publish'. 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' => array(),
>		'exclude' => array(), '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']) && empty($r['posts_per_page']) )
>		$r['posts_per_page'] = $r['numberposts'];
>	if ( ! empty($r['category']) )
>		$r['cat'] = $r['category'];
>	if ( ! empty($r['include']) ) {
>		$incposts = wp_parse_id_list( $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'] = wp_parse_id_list( $r['exclude'] );
>
>	$r['ignore_sticky_posts'] = true;
>	$r['no_found_rows'] = 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 Screen.
> *
> * @since 1.5.0
> * @uses $wpdb
> * @link http://codex.wordpress.org/Function_Reference/add_post_meta
> *
> * @param int $post_id Post ID.
> * @param string $meta_key Metadata name.
> * @param mixed $meta_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 1.5.0
> * @uses $wpdb
> * @link http://codex.wordpress.org/Function_Reference/update_post_meta
> *
> * @param int $post_id Post ID.
> * @param string $meta_key Metadata key.
> * @param mixed $meta_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) {
>	return delete_metadata( 'post', null, $post_meta_key, '', true );
>}
>
>/**
> * 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 ) {
>	$post_id = absint( $post_id );
>
>	if ( ! $post_id )
>		$post_id = get_the_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.
> */
>function is_sticky( $post_id = 0 ) {
>	$post_id = absint( $post_id );
>
>	if ( ! $post_id )
>		$post_id = get_the_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;
>
>	// Fields which contain arrays of ints.
>	$array_int_fields = array( 'ancestors' );
>	if ( in_array($field, $array_int_fields) ) {
>		$value = array_map( 'absint', $value);
>		return $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() ) {
>		$post_type_object = get_post_type_object($type);
>		if ( !current_user_can( $post_type_object->cap->read_private_posts ) ) {
>			$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();
>	foreach ( get_post_stati() as $state )
>		$stats[$state] = 0;
>
>	foreach ( (array) $count as $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 $post_mime_types List of mime types or comma separated string of mime types.
> * @param string $table_alias Optional. Specify a table alias, if needed.
> * @return string The SQL AND clause for mime searching.
> */
>function wp_post_mime_type_where($post_mime_types, $table_alias = '') {
>	$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, '%') )
>			$wheres[] = empty($table_alias) ? "post_mime_type LIKE '$mime_pattern'" : "$table_alias.post_mime_type LIKE '$mime_pattern'";
>		else
>			$wheres[] = empty($table_alias) ? "post_mime_type = '$mime_pattern'" : "$table_alias.post_mime_type = '$mime_pattern'";
>	}
>	if ( !empty($wheres) )
>		$where = ' AND (' . join(' OR ', $wheres) . ') ';
>	return $where;
>}
>
>/**
> * Trashes or deletes a post or page.
> *
> * When the post and page is permanently deleted, everything that is tied to it is deleted also.
> * This includes comments, post meta fields, and terms associated with the post.
> *
> * The post or page is moved to trash instead of permanently deleted unless trash is
> * disabled, item is already in the trash, or $force_delete is true.
> *
> * @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'.
> * @uses wp_trash_post() if item should be trashed.
> *
> * @param int $postid Post ID.
> * @param bool $force_delete Whether to bypass trash and force deletion. Defaults to false.
> * @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( $postid ) != 'trash' && EMPTY_TRASH_DAYS )
>			return wp_trash_post($postid);
>
>	if ( $post->post_type == 'attachment' )
>		return wp_delete_attachment( $postid, $force_delete );
>
>	do_action('before_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 );
>		foreach ( $comment_ids as $comment_id )
>			wp_delete_comment( $comment_id, true );
>		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', array( $postid ) );
>
>	do_action('after_delete_post', $postid);
>
>	return $post;
>}
>
>/**
> * Moves a post or page to the Trash
> *
> * If trash is disabled, the post or page is permanently deleted.
> *
> * @since 2.9.0
> * @uses do_action() on 'trash_post' before trashing
> * @uses do_action() on 'trashed_post' after trashing
> * @uses wp_delete_post() if trash is disabled
> *
> * @param int $post_id Post ID.
> * @return mixed False on failure
> */
>function wp_trash_post($post_id = 0) {
>	if ( !EMPTY_TRASH_DAYS )
>		return wp_delete_post($post_id, true);
>
>	if ( !$post = wp_get_single_post($post_id, ARRAY_A) )
>		return $post;
>
>	if ( $post['post_status'] == 'trash' )
>		return false;
>
>	do_action('wp_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 $post_id Post ID.
> * @return mixed False on failure
> */
>function wp_untrash_post($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 wp_parse_args()
> * @uses get_posts()
> *
> * @param string $deprecated Deprecated.
> * @param array $args Optional. Overrides defaults.
> * @param string $output Optional.
> * @return unknown.
> */
>function wp_get_recent_posts( $args = array(), $output = ARRAY_A ) {
>
>	if ( is_numeric( $args ) ) {
>		_deprecated_argument( __FUNCTION__, '3.1', __( 'Passing an integer number of posts is deprecated. Pass an array of arguments instead.' ) );
>		$args = array( 'numberposts' => absint( $args ) );
>	}
>
>	// Set default arguments
>	$defaults = array(
>		'numberposts' => 10, 'offset' => 0,
>		'category' => 0, 'orderby' => 'post_date',
>		'order' => 'DESC', 'include' => '',
>		'exclude' => '', 'meta_key' => '',
>		'meta_value' =>'', 'post_type' => 'post', 'post_status' => 'draft, publish, future, pending, private',
>		'suppress_filters' => true
>	);
>
>	$r = wp_parse_args( $args, $defaults );
>
>	$results = get_posts( $r );
>
>	// Backward compatibility. Prior to 3.1 expected posts to be returned in array
>	if ( ARRAY_A == $output ){
>		foreach( $results as $key => $result ) {
>			$results[$key] = get_object_vars( $result );
>		}
>		return $results ? $results : array();
>	}
>
>	return $results ? $results : false;
>
>}
>
>/**
> * 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);
>
>	if (
>		( OBJECT == $mode && empty( $post->ID ) ) ||
>		( OBJECT != $mode && empty( $post['ID'] ) )
>	)
>		return ( OBJECT == $mode ? null : array() );
>
>	// Set categories and tags
>	if ( $mode == OBJECT ) {
>		$post->post_category = array();
>		if ( is_object_in_taxonomy($post->post_type, 'category') )
>			$post->post_category = wp_get_post_categories($postid);
>		$post->tags_input = array();
>		if ( is_object_in_taxonomy($post->post_type, 'post_tag') )
>			$post->tags_input = wp_get_post_tags($postid, array('fields' => 'names'));
>	} else {
>		$post['post_category'] = array();
>		if ( is_object_in_taxonomy($post['post_type'], 'category') )
>			$post['post_category'] = wp_get_post_categories($postid);
>		$post['tags_input'] = array();
>		if ( is_object_in_taxonomy($post['post_type'], 'post_tag') )
>			$post['tags_input'] = wp_get_post_tags($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
> * @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 Elements that make up post to insert.
> * @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, $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,
>		'post_content' => '', 'post_title' => '');
>
>	$postarr = wp_parse_args($postarr, $defaults);
>
>	unset( $postarr[ 'filter' ] );
>
>	$postarr = sanitize_post($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';
>	}
>
>	$maybe_empty = ! $post_content && ! $post_title && ! $post_excerpt && post_type_supports( $post_type, 'editor' )
>		&& post_type_supports( $post_type, 'title' ) && post_type_supports( $post_type, 'excerpt' );
>	if ( apply_filters( 'wp_insert_post_empty_content', $maybe_empty, $postarr ) ) {
>		if ( $wp_error )
>			return new WP_Error( 'empty_content', __( 'Content, title, and excerpt are empty.' ) );
>		else
>			return 0;
>	}
>
>	if ( empty($post_type) )
>		$post_type = 'post';
>
>	if ( empty($post_status) )
>		$post_status = 'draft';
>
>	if ( !empty($post_category) )
>		$post_category = array_filter($post_category); // Filter out empty terms
>
>	// Make sure we set a valid category.
>	if ( empty($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
>		// 'post' requires at least one category.
>		if ( 'post' == $post_type && 'auto-draft' != $post_status )
>			$post_category = array( get_option('default_category') );
>		else
>			$post_category = array();
>	}
>
>	if ( empty($post_author) )
>		$post_author = $user_ID;
>
>	$post_ID = 0;
>
>	// Get the post ID and GUID
>	if ( $update ) {
>		$post_ID = (int) $ID;
>		$guid = get_post_field( 'guid', $post_ID );
>		$post_before = get_post($post_ID);
>	}
>
>	// Don't allow contributors to set the post slug for pending review posts
>	if ( 'pending' == $post_status && !current_user_can( 'publish_posts' ) )
>		$post_name = '';
>
>	// Create a valid post name. Drafts and pending posts are allowed to have an empty
>	// post name.
>	if ( empty($post_name) ) {
>		if ( !in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
>			$post_name = sanitize_title($post_title);
>		else
>			$post_name = '';
>	} else {
>		// On updates, we need to check to see if it's using the old, fixed sanitization context.
>		$check_name = sanitize_title( $post_name, '', 'old-save' );
>		if ( $update && strtolower( urlencode( $post_name ) ) == $check_name && get_post_field( 'post_name', $ID ) == $check_name )
>			$post_name = $check_name;
>		else // new post, or slug has changed.
>			$post_name = sanitize_title($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', 'auto-draft' ) ) )
>			$post_date_gmt = get_gmt_from_date($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';
>	} elseif( 'future' == $post_status ) {
>		$now = gmdate('Y-m-d H:i:59');
>		if ( mysql2date('U', $post_date_gmt, false) <= mysql2date('U', $now, false) )
>			$post_status = 'publish';
>	}
>
>	if ( empty($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;
>
>	// Check the post_parent to see if it will cause a hierarchy loop
>	$post_parent = apply_filters( 'wp_insert_post_parent', $post_parent, $post_ID, compact( array_keys( $postarr ) ), $postarr );
>
>	if ( isset($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', 'auto-draft' ) ) ) {
>		$data['post_name'] = sanitize_title($data['post_title'], $post_ID);
>		$wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
>	}
>
>	if ( is_object_in_taxonomy($post_type, 'category') )
>		wp_set_post_categories( $post_ID, $post_category );
>
>	if ( isset( $tags_input ) && is_object_in_taxonomy($post_type, 'post_tag') )
>		wp_set_post_tags( $post_ID, $tags_input );
>
>	// new-style support for all custom taxonomies
>	if ( !empty($tax_input) ) {
>		foreach ( $tax_input as $taxonomy => $tags ) {
>			$taxonomy_obj = get_taxonomy($taxonomy);
>			if ( is_array($tags) ) // array = hierarchical, string = non-hierarchical.
>				$tags = array_filter($tags);
>			if ( current_user_can($taxonomy_obj->cap->assign_terms) )
>				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);
>		$post_after = get_post($post_ID);
>		do_action( 'post_updated', $post_ID, $post_after, $post_before);
>	}
>
>	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 ( isset( $post['post_status'] ) && in_array($post['post_status'], array('draft', 'pending', 'auto-draft')) && 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);
>
>	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', array( $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);
>}
>
>
>/**
> * Computes a unique slug for the post, when given the desired slug and some post details.
> *
> * @since 2.8.0
> *
> * @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', 'auto-draft' ) ) )
>		return $slug;
>
>	global $wpdb, $wp_rewrite;
>
>	$feeds = $wp_rewrite->feeds;
>	if ( ! is_array( $feeds ) )
>		$feeds = array();
>
>	$hierarchical_post_types = get_post_types( array('hierarchical' => true) );
>	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 ) || apply_filters( 'wp_unique_post_slug_is_bad_attachment_slug', false, $slug ) ) {
>			$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, $feeds ) || preg_match( "@^($wp_rewrite->pagination_base)?\d+$@", $slug ) || apply_filters( 'wp_unique_post_slug_is_bad_hierarchical_slug', false, $slug, $post_type, $post_parent ) ) {
>			$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, $feeds ) || apply_filters( 'wp_unique_post_slug_is_bad_flat_slug', false, $slug, $post_type ) ) {
>			$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 apply_filters( 'wp_unique_post_slug', $slug, $post_ID, $post_status, $post_type, $post_parent );
>}
>
>/**
> * 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 mixed Array of affected term IDs. WP_Error or false on failure.
> */
>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 mixed Array of affected term IDs. WP_Error or false on failure.
> */
>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,") );
>
>	// Hierarchical taxonomies must always pass IDs rather than names so that children with the same
>	// names but different parents aren't confused.
>	if ( is_taxonomy_hierarchical( $taxonomy ) ) {
>		$tags = array_map( 'intval', $tags );
>		$tags = array_unique( $tags );
>	}
>
>	return wp_set_object_terms($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;
>	$post_type = get_post_type( $post_ID );
>	$post_status = get_post_status( $post_ID );
>	// If $post_categories isn't already an array, make it one:
>	if ( !is_array($post_categories) || empty($post_categories) ) {
>		if ( 'post' == $post_type && 'auto-draft' != $post_status )
>			$post_categories = array( get_option('default_category') );
>		else
>			$post_categories = array();
>	} else if ( 1 == count($post_categories) && '' == reset($post_categories) ) {
>		return true;
>	}
>
>	if ( !empty($post_categories) ) {
>		$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, $post_id);
>	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') {
>	$p = get_post($page, $output, $filter);
>	return $p;
>}
>
>/**
> * 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. Default OBJECT.
> * @param string $post_type Optional. Post type. Default page.
> * @return mixed Null when complete.
> */
>function get_page_by_path($page_path, $output = OBJECT, $post_type = 'page') {
>	global $wpdb;
>
>	$page_path = rawurlencode(urldecode($page_path));
>	$page_path = str_replace('%2F', '/', $page_path);
>	$page_path = str_replace('%20', ' ', $page_path);
>	$parts = explode( '/', trim( $page_path, '/' ) );
>	$parts = array_map( 'esc_sql', $parts );
>	$parts = array_map( 'sanitize_title_for_query', $parts );
>
>	$in_string = "'". implode( "','", $parts ) . "'";
>	$post_type_sql = $post_type;
>	$wpdb->escape_by_ref( $post_type_sql );
>	$pages = $wpdb->get_results( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_name IN ($in_string) AND (post_type = '$post_type_sql' OR post_type = 'attachment')", OBJECT_K );
>
>	$revparts = array_reverse( $parts );
>
>	$foundid = 0;
>	foreach ( (array) $pages as $page ) {
>		if ( $page->post_name == $revparts[0] ) {
>			$count = 0;
>			$p = $page;
>			while ( $p->post_parent != 0 && isset( $pages[ $p->post_parent ] ) ) {
>				$count++;
>				$parent = $pages[ $p->post_parent ];
>				if ( ! isset( $revparts[ $count ] ) || $parent->post_name != $revparts[ $count ] )
>					break;
>				$p = $parent;
>			}
>
>			if ( $p->post_parent == 0 && $count+1 == count( $revparts ) && $p->post_name == $revparts[ $count ] ) {
>				$foundid = $page->ID;
>				break;
>			}
>		}
>	}
>
>	if ( $foundid )
>		return get_page( $foundid, $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. Default OBJECT.
> * @param string $post_type Optional. Post type. Default page.
> * @return mixed
> */
>function get_page_by_title($page_title, $output = OBJECT, $post_type = 'page' ) {
>	global $wpdb;
>	$page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type= %s", $page_title, $post_type ) );
>	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 $pages Posts array.
> * @param int $page_id Parent page ID.
> * @return array A list arranged by hierarchy. Children immediately follow their parents.
> */
>function &get_page_hierarchy( &$pages, $page_id = 0 ) {
>	if ( empty( $pages ) ) {
>		$result = array();
>		return $result;
>	}
>
>	$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-children relations
> *
> * @since 2.9.0
> */
>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 mixed $page Page object or page ID.
> * @return string Page URI.
> */
>function get_page_uri($page) {
>	if ( ! is_object($page) )
>		$page = get_page($page);
>	$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' => array(), 'include' => array(),
>		'meta_key' => '', 'meta_value' => '',
>		'authors' => '', 'parent' => -1, 'exclude_tree' => '',
>		'number' => '', 'offset' => 0,
>		'post_type' => 'page', 'post_status' => 'publish',
>	);
>
>	$r = wp_parse_args( $args, $defaults );
>	extract( $r, EXTR_SKIP );
>	$number = (int) $number;
>	$offset = (int) $offset;
>
>	// Make sure the post type is hierarchical
>	$hierarchical_post_types = get_post_types( array( 'hierarchical' => true ) );
>	if ( !in_array( $post_type, $hierarchical_post_types ) )
>		return false;
>
>	// Make sure we have a valid post status
>	if ( !is_array( $post_status ) )
>		$post_status = explode( ',', $post_status );
>	if ( array_diff( $post_status, get_post_stati() ) )
>		return false;
>
>	$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 = wp_parse_id_list( $include );
>		if ( ! empty( $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 = wp_parse_id_list( $exclude );
>		if ( ! empty( $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 ( ! empty( $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_user_by('login', $post_author);
>					if ( empty($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);
>
>	if ( 1 == count( $post_status ) ) {
>		$where_post_type = $wpdb->prepare( "post_type = %s AND post_status = %s", $post_type, array_shift( $post_status ) );
>	} else {
>		$post_status = implode( "', '", $post_status );
>		$where_post_type = $wpdb->prepare( "post_type = %s AND post_status IN ('$post_status')", $post_type );
>	}
>
>	$orderby_array = array();
>	$allowed_keys = array('author', 'post_author', 'date', 'post_date', 'title', 'post_title', 'name', 'post_name', 'modified',
>						 'post_modified', 'modified_gmt', 'post_modified_gmt', 'menu_order', 'parent', 'post_parent',
>						 'ID', 'rand', 'comment_count');
>	foreach ( explode( ',', $sort_column ) as $orderby ) {
>		$orderby = trim( $orderby );
>		if ( !in_array( $orderby, $allowed_keys ) )
>			continue;
>
>		switch ( $orderby ) {
>			case 'menu_order':
>				break;
>			case 'ID':
>				$orderby = "$wpdb->posts.ID";
>				break;
>			case 'rand':
>				$orderby = 'RAND()';
>				break;
>			case 'comment_count':
>				$orderby = "$wpdb->posts.comment_count";
>				break;
>			default:
>				if ( 0 === strpos( $orderby, 'post_' ) )
>					$orderby = "$wpdb->posts." . $orderby;
>				else
>					$orderby = "$wpdb->posts.post_" . $orderby;
>		}
>
>		$orderby_array[] = $orderby;
>
>	}
>	$sort_column = ! empty( $orderby_array ) ? implode( ',', $orderby_array ) : "$wpdb->posts.post_title";
>
>	$sort_order = strtoupper( $sort_order );
>	if ( '' !== $sort_order && !in_array( $sort_order, array( 'ASC', 'DESC' ) ) )
>		$sort_order = 'ASC';
>
>	$query = "SELECT * FROM $wpdb->posts $join WHERE ($where_post_type) $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($url, home_url()) === false)
>		return false;
>	if (strpos($url, home_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 $parent Parent post ID.
> * @return int Attachment ID.
> */
>function wp_insert_attachment($object, $file = false, $parent = 0) {
>	global $wpdb, $user_ID;
>
>	$defaults = array('post_status' => 'inherit', '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, 'context' => '');
>
>	$object = wp_parse_args($object, $defaults);
>	if ( !empty($parent) )
>		$object['post_parent'] = $parent;
>
>	unset( $object[ 'filter' ] );
>
>	$object = sanitize_post($object, 'db');
>
>	// export array as variables
>	extract($object, EXTR_SKIP);
>
>	if ( empty($post_author) )
>		$post_author = $user_ID;
>
>	$post_type = 'attachment';
>
>	if ( ! in_array( $post_status, array( 'inherit', 'private' ) ) )
>		$post_status = 'inherit';
>
>	// Make sure we set a valid category.
>	if ( !isset($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
>		// 'post' requires at least one category.
>		if ( 'post' == $post_type )
>			$post_category = array( get_option('default_category') );
>		else
>			$post_category = array();
>	}
>
>	// Are we updating or creating?
>	if ( !empty($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 ( ! empty( $context ) )
>		add_post_meta( $post_ID, '_wp_attachment_context', $context, true );
>
>	if ( $update) {
>		do_action('edit_attachment', $post_ID);
>	} else {
>		do_action('add_attachment', $post_ID);
>	}
>
>	return $post_ID;
>}
>
>/**
> * Trashes or deletes an attachment.
> *
> * When an attachment is permanently deleted, the file will also be removed.
> * Deletion removes all post meta fields, taxonomy, comments, etc. associated
> * with the attachment (except the main post).
> *
> * The attachment is moved to the trash instead of permanently deleted unless trash
> * for media is disabled, item is already in the trash, or $force_delete is true.
> *
> * @since 2.0.0
> * @uses $wpdb
> * @uses do_action() Calls 'delete_attachment' hook on Attachment ID.
> *
> * @param int $post_id Attachment ID.
> * @param bool $force_delete Whether to bypass trash and force deletion. Defaults to false.
> * @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 );
>
>	if ( is_multisite() )
>		delete_transient( 'dirsize_cache' );
>
>	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 );
>		foreach ( $comment_ids as $comment_id )
>			wp_delete_comment( $comment_id, true );
>		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
>	foreach ( get_intermediate_image_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 = 0, $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;
>
>	if ( 'attachment' != $post->post_type )
>		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 recommended to rely upon this.
>		$url = get_the_guid( $post->ID );
>
>	$url = apply_filters( 'wp_get_attachment_url', $url, $post->ID );
>
>	if ( empty( $url ) )
>		return false;
>
>	return $url;
>}
>
>/**
> * 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 ) {
>				$keys = array_keys( $dirs );
>				$dir = array_shift( $keys );
>				$uri = array_shift($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 post objects and save the old slug.
> *
> * The function is used when a post object of any type is updated,
> * by comparing the current and previous post objects.
> *
> * 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 post objects, 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.
> * @param object $post The Post Object
> * @param object $post_before The Previous Post Object
> * @return int Same as $post_id
> */
>function wp_check_for_changed_slugs($post_id, $post, $post_before) {
>	// dont bother if it hasnt changed
>	if ( $post->post_name == $post_before->post_name )
>		return;
>
>	// we're only concerned with published, non-hierarchical objects
>	if ( $post->post_status != 'publish' || is_post_type_hierarchical( $post->post_type ) )
>		return;
>
>	$old_slugs = (array) get_post_meta($post_id, '_wp_old_slug');
>
>	// if we haven't added this old slug before, add it now
>	if ( !empty( $post_before->post_name ) && !in_array($post_before->post_name, $old_slugs) )
>		add_post_meta($post_id, '_wp_old_slug', $post_before->post_name);
>
>	// if the new slug was used previously, delete it from the list
>	if ( in_array($post->post_name, $old_slugs) )
>		delete_post_meta($post_id, '_wp_old_slug', $post->post_name);
>}
>
>/**
> * Retrieve the private post SQL based on capability.
> *
> * This function provides a standardized way to appropriately select on the
> * post_status of a post type. 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.
> *
> * @since 2.2.0
> *
> * @uses $user_ID
> *
> * @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 ) {
>	return get_posts_by_author_sql( $post_type, false );
>}
>
>/**
> * Retrieve the post SQL based on capability, author, and type.
> *
> * @see get_private_posts_cap_sql() for full description.
> *
> * @since 3.0.0
> * @param string $post_type Post type.
> * @param bool $full Optional. Returns a full WHERE statement instead of just an 'andalso' term.
> * @param int $post_author Optional. Query posts having a single author ID.
> * @return string SQL WHERE code that can be added to a query.
> */
>function get_posts_by_author_sql( $post_type, $full = true, $post_author = null ) {
>	global $user_ID, $wpdb;
>
>	// Private posts
>	$post_type_obj = get_post_type_object( $post_type );
>	if ( ! $post_type_obj )
>		return $full ? 'WHERE 1 = 0' : ' 1 = 0 ';
>
>	// This hook is deprecated. Why you'd want to use it, I dunno.
>	if ( ! $cap = apply_filters( 'pub_priv_sql_capability', '' ) )
>		$cap = $post_type_obj->cap->read_private_posts;
>
>	if ( $full ) {
>		if ( null === $post_author ) {
>			$sql = $wpdb->prepare( 'WHERE post_type = %s AND ', $post_type );
>		} else {
>			$sql = $wpdb->prepare( 'WHERE post_author = %d AND post_type = %s AND ', $post_author, $post_type );
>		}
>	} else {
>		$sql = '';
>	}
>
>	$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.
>		$id = (int) $user_ID;
>		if ( null === $post_author || ! $full ) {
>			$sql .= " OR post_status = 'private' AND post_author = $id";
>		} elseif ( $id == (int) $post_author ) {
>			$sql .= " OR post_status = 'private'";
>		} // else none
>	} // else none
>
>	$sql .= ')';
>
>	return $sql;
>}
>
>/**
> * Retrieve the date that 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 apply_filters() Calls 'get_lastpostdate' filter
> *
> * @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') {
>	return apply_filters( 'get_lastpostdate', _get_last_post_time( $timezone, 'date' ), $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 apply_filters() Calls 'get_lastpostmodified' filter
> *
> * @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') {
>	$lastpostmodified = _get_last_post_time( $timezone, 'modified' );
>
>	$lastpostdate = get_lastpostdate($timezone);
>	if ( $lastpostdate > $lastpostmodified )
>		$lastpostmodified = $lastpostdate;
>
>	return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
>}
>
>/**
> * Retrieve latest post date data based on timezone.
> *
> * @access private
> * @since 3.1.0
> *
> * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
> * @param string $field Field to check. Can be 'date' or 'modified'.
> * @return string The date.
> */
>function _get_last_post_time( $timezone, $field ) {
>	global $wpdb;
>
>	if ( !in_array( $field, array( 'date', 'modified' ) ) )
>		return false;
>
>	$timezone = strtolower( $timezone );
>
>	$key = "lastpost{$field}:$timezone";
>
>	$date = wp_cache_get( $key, 'timeinfo' );
>
>	if ( !$date ) {
>		$add_seconds_server = date('Z');
>
>		$post_types = get_post_types( array( 'public' => true ) );
>		array_walk( $post_types, array( &$wpdb, 'escape_by_ref' ) );
>		$post_types = "'" . implode( "', '", $post_types ) . "'";
>
>		switch ( $timezone ) {
>			case 'gmt':
>				$date = $wpdb->get_var("SELECT post_{$field}_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
>				break;
>			case 'blog':
>				$date = $wpdb->get_var("SELECT post_{$field} FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
>				break;
>			case 'server':
>				$date = $wpdb->get_var("SELECT DATE_ADD(post_{$field}_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
>				break;
>		}
>
>		if ( $date )
>			wp_cache_set( $key, $date, 'timeinfo' );
>	}
>
>	return $date;
>}
>
>/**
> * 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;
>
>	if ( 0 === $id )
>		return;
>
>	wp_cache_delete($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 ) {
>			// Loop detection
>			if ( $cid == $id )
>				continue;
>			clean_post_cache( $cid );
>		}
>	}
>
>	if ( is_multisite() )
>		wp_cache_delete( $wpdb->blogid . '-' . $id, 'global-posts' );
>}
>
>/**
> * 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
> * @param string $post_type The post type of the posts in $posts. Default is 'post'.
> * @param bool $update_term_cache Whether to update the term cache. Default is true.
> * @param bool $update_meta_cache Whether to update the meta cache. Default is true.
> */
>function update_post_caches(&$posts, $post_type = 'post', $update_term_cache = true, $update_meta_cache = true) {
>	// No point in doing all this work if we didn't match any posts.
>	if ( !$posts )
>		return;
>
>	update_post_cache($posts);
>
>	$post_ids = array();
>	foreach ( $posts as $post )
>		$post_ids[] = $post->ID;
>
>	if ( empty($post_type) )
>		$post_type = 'post';
>
>	if ( $update_term_cache ) {
>		if ( is_array($post_type) ) {
>			$ptypes = $post_type;
>		} elseif ( 'any' == $post_type ) {
>			// Just use the post_types in the supplied posts.
>			foreach ( $posts as $post )
>				$ptypes[] = $post->post_type;
>			$ptypes = array_unique($ptypes);
>		} else {
>			$ptypes = array($post_type);
>		}
>
>		if ( ! empty($ptypes) )
>			update_object_term_cache($post_ids, $ptypes);
>	}
>
>	if ( $update_meta_cache )
>		update_postmeta_cache($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);
>}
>
>/**
> * Will clean the attachment in the cache.
> *
> * Cleaning means delete from the cache. Optionally will clean the term
> * object cache associated with the attachment ID.
> *
> * This function will not run if $_wp_suspend_cache_invalidation is not empty. See
> * wp_suspend_cache_invalidation().
> *
> * @package WordPress
> * @subpackage Cache
> * @since 3.0.0
> *
> * @uses do_action() Calls 'clean_attachment_cache' on $id.
> *
> * @param int $id The attachment ID in the cache to clean
> * @param bool $clean_terms optional. Whether to clean terms cache
> */
>function clean_attachment_cache($id, $clean_terms = false) {
>	global $_wp_suspend_cache_invalidation;
>
>	if ( !empty($_wp_suspend_cache_invalidation) )
>		return;
>
>	$id = (int) $id;
>
>	wp_cache_delete($id, 'posts');
>	wp_cache_delete($id, 'post_meta');
>
>	if ( $clean_terms )
>		clean_object_term_cache($id, 'attachment');
>
>	do_action('clean_attachment_cache', $id);
>}
>
>//
>// 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
>	}
>
>	// If published posts changed clear the lastpostmodified cache
>	if ( 'publish' == $new_status || 'publish' == $old_status) {
>		foreach ( array( 'server', 'gmt', 'blog' ) as $timezone ) {
>			wp_cache_delete( "lastpostmodified:$timezone", 'timeinfo' );
>			wp_cache_delete( "lastpostdate:$timezone", 'timeinfo' );
>		}
>	}
>
>	// Always clears the hook in case the post status bounced from future to draft.
>	wp_clear_scheduled_hook('publish_future_post', array( $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. Never implemented.
> * Not marked as deprecated with _deprecated_argument() as it conflicts with
> * wp_transition_post_status() and the default filter for _future_post_hook().
> * @param object $post Object type containing the post information
> */
>function _future_post_hook( $deprecated = '', $post ) {
>	wp_clear_scheduled_hook( 'publish_future_post', array( $post->ID ) );
>	wp_schedule_single_event( strtotime( get_gmt_from_date( $post->post_date ) . ' 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 2.5.0
> * @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) ) ) {
>		// Loop detection: If the ancestor has been seen before, break.
>		if ( ( $ancestor == $_post->ID ) || in_array($ancestor, $_post->ancestors) )
>			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 inserted 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( $post_id ) {
>	// We do autosaves manually with wp_create_post_autosave()
>	if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
>		return;
>
>	// WP_POST_REVISIONS = 0, false
>	if ( ! WP_POST_REVISIONS )
>		return;
>
>	if ( !$post = get_post( $post_id, ARRAY_A ) )
>		return;
>
>	if ( !post_type_supports($post['post_type'], 'revisions') )
>		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 autosaves 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.
> * @return mixed Null or WP_Error if error, deleted post 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, $args = null ) {
>	if ( ! WP_POST_REVISIONS )
>		return array();
>	if ( ( !$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');
>	}
>}
>
>/**
> * Returns the post's parent's post_ID
> *
> * @since 3.1.0
> *
> * @param int $post_id
> *
> * @return int|bool false on error
> */
>function wp_get_post_parent_id( $post_ID ) {
>	$post = get_post( $post_ID );
>	if ( !$post || is_wp_error( $post ) )
>		return false;
>	return (int) $post->post_parent;
>}
>
>/**
> * Checks the given subset of the post hierarchy for hierarchy loops.
> * Prevents loops from forming and breaks those that it finds.
> *
> * Attached to the wp_insert_post_parent filter.
> *
> * @since 3.1.0
> * @uses wp_find_hierarchy_loop()
> *
> * @param int $post_parent ID of the parent for the post we're checking.
> * @parem int $post_ID ID of the post we're checking.
> *
> * @return int The new post_parent for the post.
> */
>function wp_check_post_hierarchy_for_loops( $post_parent, $post_ID ) {
>	// Nothing fancy here - bail
>	if ( !$post_parent )
>		return 0;
>
>	// New post can't cause a loop
>	if ( empty( $post_ID ) )
>		return $post_parent;
>
>	// Can't be its own parent
>	if ( $post_parent == $post_ID )
>		return 0;
>
>	// Now look for larger loops
>
>	if ( !$loop = wp_find_hierarchy_loop( 'wp_get_post_parent_id', $post_ID, $post_parent ) )
>		return $post_parent; // No loop
>
>	// Setting $post_parent to the given value causes a loop
>	if ( isset( $loop[$post_ID] ) )
>		return 0;
>
>	// There's a loop, but it doesn't contain $post_ID. Break the loop.
>	foreach ( array_keys( $loop ) as $loop_member )
>		wp_update_post( array( 'ID' => $loop_member, 'post_parent' => 0 ) );
>
>	return $post_parent;
>}
>
>/**
> * Returns an array of post format slugs to their translated and pretty display versions
> *
> * @since 3.1.0
> *
> * @return array The array of translations
> */
>function get_post_format_strings() {
>	$strings = array(
>		'standard' => _x( 'Standard', 'Post format' ), // Special case. any value that evals to false will be considered standard
>		'aside' => _x( 'Aside', 'Post format' ),
>		'chat' => _x( 'Chat', 'Post format' ),
>		'gallery' => _x( 'Gallery', 'Post format' ),
>		'link' => _x( 'Link', 'Post format' ),
>		'image' => _x( 'Image', 'Post format' ),
>		'quote' => _x( 'Quote', 'Post format' ),
>		'status' => _x( 'Status', 'Post format' ),
>		'video' => _x( 'Video', 'Post format' ),
>		'audio' => _x( 'Audio', 'Post format' ),
>	);
>	return $strings;
>}
>
>/**
> * Retrieves an array of post format slugs.
> *
> * @since 3.1.0
> *
> * @return array The array of post format slugs.
> */
>function get_post_format_slugs() {
>	$slugs = array_keys( get_post_format_strings() );
>	return array_combine( $slugs, $slugs );
>}
>
>/**
> * Returns a pretty, translated version of a post format slug
> *
> * @since 3.1.0
> *
> * @param string $slug A post format slug
> * @return string The translated post format name
> */
>function get_post_format_string( $slug ) {
>	$strings = get_post_format_strings();
>	if ( !$slug )
>		return $strings['standard'];
>	else
>		return ( isset( $strings[$slug] ) ) ? $strings[$slug] : '';
>}
>
>/**
> * Sets a post thumbnail.
> *
> * @since 3.1.0
> *
> * @param int|object $post Post ID or object where thumbnail should be attached.
> * @param int $thumbnail_id Thumbnail to attach.
> * @return bool True on success, false on failure.
> */
>function set_post_thumbnail( $post, $thumbnail_id ) {
>	$post = get_post( $post );
>	$thumbnail_id = absint( $thumbnail_id );
>	if ( $post && $thumbnail_id && get_post( $thumbnail_id ) ) {
>		$thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'thumbnail' );
>		if ( ! empty( $thumbnail_html ) ) {
>			update_post_meta( $post->ID, '_thumbnail_id', $thumbnail_id );
>			return true;
>		}
>	}
>	return false;
>}
>
>/**
> * Removes a post thumbnail.
> *
> * @since 3.3.0
> *
> * @param int|object $post Post ID or object where thumbnail should be removed from.
> * @return bool True on success, false on failure.
> */
>function delete_post_thumbnail( $post ) {
>	$post = get_post( $post );
>	if ( $post )
>		return delete_post_meta( $post->ID, '_thumbnail_id' );
>	return false;
>}
>
>/**
> * Returns a link to a post format index.
> *
> * @since 3.1.0
> *
> * @param string $format Post format
> * @return string Link
> */
>function get_post_format_link( $format ) {
>	$term = get_term_by('slug', 'post-format-' . $format, 'post_format' );
>	if ( ! $term || is_wp_error( $term ) )
>		return false;
>	return get_term_link( $term );
>}
>
>/**
> * Filters the request to allow for the format prefix.
> *
> * @access private
> * @since 3.1.0
> */
>function _post_format_request( $qvs ) {
>	if ( ! isset( $qvs['post_format'] ) )
>		return $qvs;
>	$slugs = get_post_format_slugs();
>	if ( isset( $slugs[ $qvs['post_format'] ] ) )
>		$qvs['post_format'] = 'post-format-' . $slugs[ $qvs['post_format'] ];
>	$tax = get_taxonomy( 'post_format' );
>	if ( ! is_admin() )
>		$qvs['post_type'] = $tax->object_type;
>	return $qvs;
>}
>add_filter( 'request', '_post_format_request' );
>
>/**
> * Filters the post format term link to remove the format prefix.
> *
> * @access private
> * @since 3.1.0
> */
>function _post_format_link( $link, $term, $taxonomy ) {
>	global $wp_rewrite;
>	if ( 'post_format' != $taxonomy )
>		return $link;
>	if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) {
>		return str_replace( "/{$term->slug}", '/' . str_replace( 'post-format-', '', $term->slug ), $link );
>	} else {
>		$link = remove_query_arg( 'post_format', $link );
>		return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link );
>	}
>}
>add_filter( 'term_link', '_post_format_link', 10, 3 );
>
>/**
> * Remove the post format prefix from the name property of the term object created by get_term().
> *
> * @access private
> * @since 3.1.0
> */
>function _post_format_get_term( $term ) {
>	if ( isset( $term->slug ) ) {
>		$term->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
>	}
>	return $term;
>}
>add_filter( 'get_post_format', '_post_format_get_term' );
>
>/**
> * Remove the post format prefix from the name property of the term objects created by get_terms().
> *
> * @access private
> * @since 3.1.0
> */
>function _post_format_get_terms( $terms, $taxonomies, $args ) {
>	if ( in_array( 'post_format', (array) $taxonomies ) ) {
>		if ( isset( $args['fields'] ) && 'names' == $args['fields'] ) {
>			foreach( $terms as $order => $name ) {
>				$terms[$order] = get_post_format_string( str_replace( 'post-format-', '', $name ) );
>			}
>		} else {
>			foreach ( (array) $terms as $order => $term ) {
>				if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
>					$terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
>				}
>			}
>		}
>	}
>	return $terms;
>}
>add_filter( 'get_terms', '_post_format_get_terms', 10, 3 );
>
>/**
> * Remove the post format prefix from the name property of the term objects created by wp_get_object_terms().
> *
> * @access private
> * @since 3.1.0
> */
>function _post_format_wp_get_object_terms( $terms ) {
>	foreach ( (array) $terms as $order => $term ) {
>		if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
>			$terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
>		}
>	}
>	return $terms;
>}
>add_filter( 'wp_get_object_terms', '_post_format_wp_get_object_terms' );
>
>/**
> * Update the custom taxonomies' term counts when a post's status is changed. For example, default posts term counts (for custom taxonomies) don't include private / draft posts.
> *
> * @access private
> * @param string $new_status
> * @param string $old_status
> * @param object $post
> * @since 3.3.0
> */
>function _update_term_count_on_transition_post_status( $new_status, $old_status, $post ) {
>	// Update counts for the post's terms.
>	foreach ( (array) get_object_taxonomies( $post->post_type ) as $taxonomy ) {
>		$tt_ids = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'tt_ids' ) );
>		wp_update_term_count( $tt_ids, $taxonomy );
>	}
>}
>?>

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Attachments on bug 826623: 587770