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WordPress/wp-includes/post.php

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<?php
/**
* Post functions and post utility function.
*
* @package WordPress
* @subpackage Post
* @since 1.5.0
*/
/**
* Retrieve attached file path based on attachment ID.
*
* You can optionally send it through the 'get_attached_file' filter, but by
* default it will just return the file path unfiltered.
*
* The function works by getting the single post meta name, named
* '_wp_attached_file' and returning it. This is a convenience function to
* prevent looking up the meta name and provide a mechanism for sending the
* attached filename through a filter.
*
* @since 2.0.0
* @uses apply_filters() Calls 'get_attached_file' on file path and attachment ID.
*
* @param int $attachment_id Attachment ID
* @param bool $unfiltered Whether to apply filters or not
* @return string The file path to the attached file.
*/
function get_attached_file( $attachment_id, $unfiltered = false ) {
$file = get_post_meta( $attachment_id, '_wp_attached_file', true );
// If the file is relative, prepend upload dir
if ( 0 !== strpos($file, '/') && !preg_match('|^.:\\\|', $file) && ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) )
$file = $uploads['basedir'] . "/$file";
if ( $unfiltered )
return $file;
return apply_filters( 'get_attached_file', $file, $attachment_id );
}
/**
* Update attachment file path based on attachment ID.
*
* Used to update the file path of the attachment, which uses post meta name
* '_wp_attached_file' to store the path of the attachment.
*
* @since 2.1.0
* @uses apply_filters() Calls 'update_attached_file' on file path and attachment ID.
*
* @param int $attachment_id Attachment ID
* @param string $file File path for the attachment
* @return bool False on failure, true on success.
*/
function update_attached_file( $attachment_id, $file ) {
if ( !get_post( $attachment_id ) )
return false;
$file = apply_filters( 'update_attached_file', $file, $attachment_id );
// Make the file path relative to the upload dir
if ( ($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 path
$file = str_replace($uploads['basedir'], '', $file); // Remove upload dir from the file path
$file = ltrim($file, '/');
}
}
return update_post_meta( $attachment_id, '_wp_attached_file', $file );
}
/**
* 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) {
if ( empty( $args ) ) {
if ( isset( $GLOBALS['post'] ) ) {
$args = array('post_parent' => (int) $GLOBALS['post']->post_parent );
} else {
return false;
}
} 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' => '',
'post_status' => '', 'post_parent' => 0
);
$r = wp_parse_args( $args, $defaults );
$children = get_posts( $r );
if ( !$children ) {
$kids = false;
return $kids;
}
update_post_cache($children);
foreach ( $children as $key => $child )
$kids[$child->ID] =& $children[$key];
if ( $output == OBJECT ) {
return $kids;
} elseif ( $output == ARRAY_A ) {
foreach ( (array) $kids as $kid )
$weeuns[$kid->ID] = get_object_vars($kids[$kid->ID]);
return $weeuns;
} elseif ( $output == ARRAY_N ) {
foreach ( (array) $kids as $kid )
$babes[$kid->ID] = array_values(get_object_vars($kids[$kid->ID]));
return $babes;
} else {
return $kids;
}
}
/**
* Get extended entry info (<!--more-->).
*
* There should not be any space after the second dash and before the word
* 'more'. There can be text or space(s) after the word 'more', but won't be
* referenced.
*
* The returned array has 'main' and 'extended' keys. Main has the text before
* the <code><!--more--></code>. The 'extended' key has the content after the
* <code><!--more--></code> comment.
*
* @since 1.0.0
*
* @param string $post Post content.
* @return array Post before ('main') and after ('extended').
*/
function get_extended($post) {
//Match the new style more links
if ( preg_match('/<!--more(.*?)?-->/', $post, $matches) ) {
list($main, $extended) = explode($matches[0], $post, 2);
} else {
$main = $post;
$extended = '';
}
// Strip leading and trailing whitespace
$main = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $main);
$extended = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $extended);
return array('main' => $main, 'extended' => $extended);
}
/**
* Retrieves post data given a post ID or post object.
*
* See {@link sanitize_post()} for optional $filter values. Also, the parameter
* $post, must be given as a variable, since it is passed by reference.
*
* @since 1.5.1
* @uses $wpdb
* @link http://codex.wordpress.org/Function_Reference/get_post
*
* @param int|object $post Post ID or post object.
* @param string $output Optional, default is Object. Either OBJECT, ARRAY_A, or ARRAY_N.
* @param string $filter Optional, default is raw.
* @return mixed Post data
*/
function &get_post(&$post, $output = OBJECT, $filter = 'raw') {
global $wpdb;
$null = null;
if ( empty($post) ) {
if ( isset($GLOBALS['post']) )
$_post = & $GLOBALS['post'];
else
return $null;
} elseif ( is_object($post) ) {
_get_post_ancestors($post);
wp_cache_add($post->ID, $post, 'posts');
$_post = &$post;
} else {
$post = (int) $post;
if ( ! $_post = wp_cache_get($post, 'posts') ) {
$_post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post));
if ( ! $_post )
return $null;
_get_post_ancestors($_post);
wp_cache_add($_post->ID, $_post, 'posts');
}
}
$_post = sanitize_post($_post, $filter);
if ( $output == OBJECT ) {
return $_post;
} elseif ( $output == ARRAY_A ) {
$__post = get_object_vars($_post);
return $__post;
} elseif ( $output == ARRAY_N ) {
$__post = array_values(get_object_vars($_post));
return $__post;
} else {
return $_post;
}
}
/**
* Retrieve ancestors of a post.
*
* @since 2.5.0
*
* @param int|object $post Post ID or post object
* @return array Ancestor IDs or empty array if none are found.
*/
function get_post_ancestors($post) {
$post = get_post($post);
if ( !empty($post->ancestors) )
return $post->ancestors;
return array();
}
/**
* Retrieve data from a post field based on Post ID.
*
* Examples of the post field will be, 'post_type', 'post_status', 'content',
* etc and based off of the post object property or key names.
*
* The context values are based off of the taxonomy filter functions and
* supported values are found within those functions.
*
* @since 2.3.0
* @uses sanitize_post_field() See for possible $context values.
*
* @param string $field Post field name
* @param id $post Post ID
* @param string $context Optional. How to filter the field. Default is display.
* @return WP_Error|string Value in post field or WP_Error on failure
*/
function get_post_field( $field, $post, $context = 'display' ) {
$post = (int) $post;
$post = get_post( $post );
if ( is_wp_error($post) )
return $post;
if ( !is_object($post) )
return '';
if ( !isset($post->$field) )
return '';
return sanitize_post_field($field, $post->$field, $post->ID, $context);
}
/**
* Retrieve the mime type of an attachment based on the ID.
*
* This function can be used with any post type, but it makes more sense with
* attachments.
*
* @since 2.0.0
*
* @param int $ID Optional. Post ID.
* @return bool|string False on failure or returns the mime type
*/
function get_post_mime_type($ID = '') {
$post = & get_post($ID);
if ( is_object($post) )
return $post->post_mime_type;
return false;
}
/**
* Retrieve the post status based on the Post ID.
*
* If the post ID is of an attachment, then the parent post status will be given
* instead.
*
* @since 2.0.0
*
* @param int $ID Post ID
* @return string|bool Post status or false on failure.
*/
function get_post_status($ID = '') {
$post = get_post($ID);
if ( is_object($post) ) {
if ( ('attachment' == $post->post_type) && $post->post_parent && ($post->ID != $post->post_parent) )
return get_post_status($post->post_parent);
else
return $post->post_status;
}
return false;
}
/**
* Retrieve all of the WordPress supported post statuses.
*
* Posts have a limited set of valid status values, this provides the
* post_status values and descriptions.
*
* @since 2.5.0
*
* @return array List of post statuses.
*/
function get_post_statuses( ) {
$status = array(
'draft' => __('Draft'),
'pending' => __('Pending Review'),
'private' => __('Private'),
'publish' => __('Published')
);
return $status;
}
/**
* Retrieve all of the WordPress support page statuses.
*
* Pages have a limited set of valid status values, this provides the
* post_status values and descriptions.
*
* @since 2.5.0
*
* @return array List of page statuses.
*/
function get_page_statuses( ) {
$status = array(
'draft' => __('Draft'),
'private' => __('Private'),
'publish' => __('Published')
);
return $status;
}
/**
* Retrieve the post type of the current post or of a given post.
*
* @since 2.1.0
*
* @uses $wpdb
* @uses $posts The Loop post global
*
* @param mixed $post Optional. Post object or post ID.
* @return bool|string post type or false on failure.
*/
function get_post_type($post = false) {
global $posts;
if ( false === $post )
$post = $posts[0];
elseif ( (int) $post )
$post = get_post($post, OBJECT);
if ( is_object($post) )
return $post->post_type;
return false;
}
/**
* 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->query( $wpdb->prepare("UPDATE $wpdb->posts SET post_type = %s WHERE ID = %d", $post_type, $post_id) );
if ( 'page' == $post_type )
clean_page_cache($post_id);
else
clean_post_cache($post_id);
return $return;
}
/**
* Retrieve list of latest posts or posts matching criteria.
*
* The defaults are as follows:
* 'numberposts' - Default is 5. Total number of posts to retrieve.
* 'offset' - Default is 0. See {@link WP_Query::query()} for more.
* 'category' - What category to pull the posts from.
* 'orderby' - Default is 'post_date'. How to order the posts.
* 'order' - Default is 'DESC'. The order to retrieve the posts.
* 'include' - See {@link WP_Query::query()} for more.
* 'exclude' - See {@link WP_Query::query()} for more.
* 'meta_key' - See {@link WP_Query::query()} for more.
* 'meta_value' - See {@link WP_Query::query()} for more.
* 'post_type' - Default is 'post'. Can be 'page', or 'attachment' to name a few.
* 'post_parent' - The parent of the post or post type.
* 'post_status' - Default is 'published'. Post status to retrieve.
*
* @since 1.2.0
* @uses $wpdb
* @uses WP_Query::query() See for more default arguments and information.
* @link http://codex.wordpress.org/Template_Tags/get_posts
*
* @param array $args Optional. Override defaults.
* @return array List of posts.
*/
function get_posts($args = null) {
$defaults = array(
'numberposts' => 5, 'offset' => 0,
'category' => 0, 'orderby' => 'post_date',
'order' => 'DESC', 'include' => '',
'exclude' => '', 'meta_key' => '',
'meta_value' =>'', 'post_type' => 'post',
'post_parent' => 0, 'suppress_filters' => true
);
$r = wp_parse_args( $args, $defaults );
if ( empty( $r['post_status'] ) )
$r['post_status'] = ( 'attachment' == $r['post_type'] ) ? 'inherit' : 'publish';
if ( ! empty($r['numberposts']) )
$r['posts_per_page'] = $r['numberposts'];
if ( ! empty($r['category']) )
$r['cat'] = $r['category'];
if ( ! empty($r['include']) ) {
$incposts = preg_split('/[\s,]+/',$r['include']);
$r['posts_per_page'] = count($incposts); // only the number of posts included
$r['post__in'] = $incposts;
} elseif ( ! empty($r['exclude']) )
$r['post__not_in'] = preg_split('/[\s,]+/',$r['exclude']);
$r['caller_get_posts'] = true;
$get_posts = new WP_Query;
return $get_posts->query($r);
}
//
// Post meta functions
//
/**
* Add meta data field to a post.
*
* Post meta data is called "Custom Fields" on the Administration Panels.
*
* @since 1.5.0
* @uses $wpdb
* @link http://codex.wordpress.org/Function_Reference/add_post_meta
*
* @param int $post_id Post ID.
* @param string $key Metadata name.
* @param mixed $value Metadata value.
* @param bool $unique Optional, default is false. Whether the same key should not be added.
* @return bool False for failure. True for success.
*/
function add_post_meta($post_id, $meta_key, $meta_value, $unique = false) {
global $wpdb;
// make sure meta is added to the post, not a revision
if ( $the_post = wp_is_post_revision($post_id) )
$post_id = $the_post;
// expected_slashed ($meta_key)
$meta_key = stripslashes($meta_key);
if ( $unique && $wpdb->get_var( $wpdb->prepare( "SELECT meta_key FROM $wpdb->postmeta WHERE meta_key = %s AND post_id = %d", $meta_key, $post_id ) ) )
return false;
$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
$wpdb->insert( $wpdb->postmeta, compact( 'post_id', 'meta_key', 'meta_value' ) );
wp_cache_delete($post_id, 'post_meta');
return true;
}
/**
* 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 = '') {
global $wpdb;
// make sure meta is added to the post, not a revision
if ( $the_post = wp_is_post_revision($post_id) )
$post_id = $the_post;
// expected_slashed ($meta_key, $meta_value)
$meta_key = stripslashes( $meta_key );
$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
if ( empty( $meta_value ) )
$meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = %s", $post_id, $meta_key ) );
else
$meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = %s AND meta_value = %s", $post_id, $meta_key, $meta_value ) );
if ( !$meta_id )
return false;
if ( empty( $meta_value ) )
$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = %s", $post_id, $meta_key ) );
else
$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = %s AND meta_value = %s", $post_id, $meta_key, $meta_value ) );
wp_cache_delete($post_id, 'post_meta');
return true;
}
/**
* 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) {
$post_id = (int) $post_id;
$meta_cache = wp_cache_get($post_id, 'post_meta');
if ( !$meta_cache ) {
update_postmeta_cache($post_id);
$meta_cache = wp_cache_get($post_id, 'post_meta');
}
if ( isset($meta_cache[$key]) ) {
if ( $single ) {
return maybe_unserialize( $meta_cache[$key][0] );
} else {
return array_map('maybe_unserialize', $meta_cache[$key]);
}
}
return '';
}
/**
* Update post meta field based on post ID.
*
* Use the $prev_value parameter to differentiate between meta fields with the
* same key and post ID.
*
* If the meta field for the post does not exist, it will be added.
*
* @since 1.5
* @uses $wpdb
* @link http://codex.wordpress.org/Function_Reference/update_post_meta
*
* @param int $post_id Post ID.
* @param string $key Metadata key.
* @param mixed $value Metadata value.
* @param mixed $prev_value Optional. Previous value to check before removing.
* @return bool False on failure, true if success.
*/
function update_post_meta($post_id, $meta_key, $meta_value, $prev_value = '') {
global $wpdb;
// make sure meta is added to the post, not a revision
if ( $the_post = wp_is_post_revision($post_id) )
$post_id = $the_post;
// expected_slashed ($meta_key)
$meta_key = stripslashes($meta_key);
if ( ! $wpdb->get_var( $wpdb->prepare( "SELECT meta_key FROM $wpdb->postmeta WHERE meta_key = %s AND post_id = %d", $meta_key, $post_id ) ) ) {
return add_post_meta($post_id, $meta_key, $meta_value);
}
$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
$data = compact( 'meta_value' );
$where = compact( 'meta_key', 'post_id' );
if ( !empty( $prev_value ) ) {
$prev_value = maybe_serialize($prev_value);
$where['meta_value'] = $prev_value;
}
$wpdb->update( $wpdb->postmeta, $data, $where );
wp_cache_delete($post_id, 'post_meta');
return true;
}
/**
* 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) {
global $wpdb;
if ( $wpdb->query($wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key)) ) {
/** @todo Get post_ids and delete cache */
// wp_cache_delete($post_id, 'post_meta');
return true;
}
return false;
}
/**
* Retrieve post meta fields, based on post ID.
*
* The post meta fields are retrieved from the cache, so the function is
* optimized to be called more than once. It also applies to the functions, that
* use this function.
*
* @since 1.2.0
* @link http://codex.wordpress.org/Function_Reference/get_post_custom
*
* @uses $id Current Loop Post ID
*
* @param int $post_id post ID
* @return array
*/
function get_post_custom($post_id = 0) {
global $id;
if ( !$post_id )
$post_id = (int) $id;
$post_id = (int) $post_id;
if ( ! wp_cache_get($post_id, 'post_meta') )
update_postmeta_cache($post_id);
return wp_cache_get($post_id, 'post_meta');
}
/**
* Retrieve meta field names for a post.
*
* If there are no meta fields, then nothing (null) will be returned.
*
* @since 1.2.0
* @link http://codex.wordpress.org/Function_Reference/get_post_custom_keys
*
* @param int $post_id post ID
* @return array|null Either array of the keys, or null if keys could not be retrieved.
*/
function get_post_custom_keys( $post_id = 0 ) {
$custom = get_post_custom( $post_id );
if ( !is_array($custom) )
return;
if ( $keys = array_keys($custom) )
return $keys;
}
/**
* Retrieve values for a custom post field.
*
* The parameters must not be considered optional. All of the post meta fields
* will be retrieved and only the meta field key values returned.
*
* @since 1.2.0
* @link http://codex.wordpress.org/Function_Reference/get_post_custom_values
*
* @param string $key Meta field key.
* @param int $post_id Post ID
* @return array Meta field values.
*/
function get_post_custom_values( $key = '', $post_id = 0 ) {
$custom = get_post_custom($post_id);
return $custom[$key];
}
/**
* Check if post is sticky.
*
* Sticky posts should remain at the top of The Loop. If the post ID is not
* given, then The Loop ID for the current post will be used.
*
* @since 2.7.0
*
* @param int $post_id Optional. Post ID.
* @return bool Whether post is sticky (true) or not sticky (false).
*/
function is_sticky($post_id = null) {
global $id;
$post_id = absint($post_id);
if ( !$post_id )
$post_id = absint($id);
$stickies = get_option('sticky_posts');
if ( !is_array($stickies) )
return false;
if ( in_array($post_id, $stickies) )
return true;
return false;
}
/**
* Sanitize every post field.
*
* If the context is 'raw', then the post object or array will just be returned.
*
* @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 ( 'raw' == $context )
return $post;
if ( is_object($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, $context);
} else {
if ( !isset($post['ID']) )
$post['ID'] = 0;
foreach ( array_keys($post) as $field )
$post[$field] = sanitize_post_field($field, $post[$field], $post['ID'], $context);
}
return $post;
}
/**
* Sanitize post field based on context.
*
* Possible context values are: raw, edit, db, attribute, js, and display. The
* display context is used by default.
*
* @since 2.3.0
*
* @param string $field The Post Object field name.
* @param mixed $value The Post Object value.
* @param int $post_id Post ID.
* @param string $context How to sanitize post fields.
* @return mixed Sanitized value.
*/
function sanitize_post_field($field, $value, $post_id, $context) {
$int_fields = array('ID', 'post_parent', 'menu_order');
if ( in_array($field, $int_fields) )
$value = (int) $value;
if ( 'raw' == $context )
return $value;
$prefixed = false;
if ( false !== strpos($field, 'post_') ) {
$prefixed = true;
$field_no_prefix = str_replace('post_', '', $field);
}
if ( 'edit' == $context ) {
$format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password');
if ( $prefixed ) {
$value = apply_filters("edit_$field", $value, $post_id);
// Old school
$value = apply_filters("${field_no_prefix}_edit_pre", $value, $post_id);
} else {
$value = apply_filters("edit_post_$field", $value, $post_id);
}
if ( in_array($field, $format_to_edit) ) {
if ( 'post_content' == $field )
$value = format_to_edit($value, user_can_richedit());
else
$value = format_to_edit($value);
} else {
$value = attribute_escape($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 )
$value = attribute_escape($value);
else if ( 'js' == $context )
$value = js_escape($value);
return $value;
}
/**
* Make a post sticky.
*
* Sticky posts should be displayed at the top of the front page.
*
* @since 2.7.0
*
* @param int $post_id Post ID.
*/
function stick_post($post_id) {
$stickies = get_option('sticky_posts');
if ( !is_array($stickies) )
$stickies = array($post_id);
if ( ! in_array($post_id, $stickies) )
$stickies[] = $post_id;
update_option('sticky_posts', $stickies);
}
/**
* Unstick a post.
*
* Sticky posts should be displayed at the top of the front page.
*
* @since 2.7.0
*
* @param int $post_id Post ID.
*/
function unstick_post($post_id) {
$stickies = get_option('sticky_posts');
if ( !is_array($stickies) )
return;
if ( ! in_array($post_id, $stickies) )
return;
$offset = array_search($post_id, $stickies);
if ( false === $offset )
return;
array_splice($stickies, $offset, 1);
update_option('sticky_posts', $stickies);
}
/**
* Count number of posts of a post type and is user has permissions to view.
*
* This function provides an efficient method of finding the amount of post's
* type a blog has. Another method is to count the amount of items in
* get_posts(), but that method has a lot of overhead with doing so. Therefore,
* when developing for 2.5+, use this function instead.
*
* The $perm parameter checks for 'readable' value and if the user can read
* private posts, it will display that for the user that is signed in.
*
* @since 2.5.0
* @link http://codex.wordpress.org/Template_Tags/wp_count_posts
*
* @param string $type Optional. Post type to retrieve count
* @param string $perm Optional. 'readable' or empty.
* @return object Number of posts for each status
*/
function wp_count_posts( $type = 'post', $perm = '' ) {
global $wpdb;
$user = wp_get_current_user();
$cache_key = $type;
$query = "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s";
if ( 'readable' == $perm && is_user_logged_in() ) {
if ( !current_user_can("read_private_{$type}s") ) {
$cache_key .= '_' . $perm . '_' . $user->ID;
$query .= " AND (post_status != 'private' OR ( post_author = '$user->ID' AND post_status = 'private' ))";
}
}
$query .= ' GROUP BY post_status';
$count = wp_cache_get($cache_key, 'counts');
if ( false !== $count )
return $count;
$count = $wpdb->get_results( $wpdb->prepare( $query, $type ), ARRAY_A );
$stats = array( );
foreach( (array) $count as $row_num => $row ) {
$stats[$row['post_status']] = $row['num_posts'];
}
$stats = (object) $stats;
wp_cache_set($cache_key, $stats, 'counts');
return $stats;
}
/**
* Count number of attachments for the mime type(s).
*
* If you set the optional mime_type parameter, then an array will still be
* returned, but will only have the item you are looking for. It does not give
* you the number of attachments that are children of a post. You can get that
* by counting the number of children that post has.
*
* @since 2.5.0
*
* @param string|array $mime_type Optional. Array or comma-separated list of MIME patterns.
* @return array Number of posts for each mime type.
*/
function wp_count_attachments( $mime_type = '' ) {
global $wpdb;
$and = wp_post_mime_type_where( $mime_type );
$count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' $and GROUP BY post_mime_type", ARRAY_A );
$stats = array( );
foreach( (array) $count as $row ) {
$stats[$row['post_mime_type']] = $row['num_posts'];
}
return (object) $stats;
}
/**
* Check a MIME-Type against a list.
*
* If the wildcard_mime_types parameter is a string, it must be comma separated
* list. If the real_mime_types is a string, it is also comma separated to
* create the list.
*
* @since 2.5.0
*
* @param string|array $wildcard_mime_types e.g. audio/mpeg or image (same as image/*) or flash (same as *flash*)
* @param string|array $real_mime_types post_mime_type values
* @return array array(wildcard=>array(real types))
*/
function wp_match_mime_types($wildcard_mime_types, $real_mime_types) {
$matches = array();
if ( is_string($wildcard_mime_types) )
$wildcard_mime_types = array_map('trim', explode(',', $wildcard_mime_types));
if ( is_string($real_mime_types) )
$real_mime_types = array_map('trim', explode(',', $real_mime_types));
$wild = '[-._a-z0-9]*';
foreach ( (array) $wildcard_mime_types as $type ) {
$type = str_replace('*', $wild, $type);
$patternses[1][$type] = "^$type$";
if ( false === strpos($type, '/') ) {
$patternses[2][$type] = "^$type/";
$patternses[3][$type] = $type;
}
}
asort($patternses);
foreach ( $patternses as $patterns )
foreach ( $patterns as $type => $pattern )
foreach ( (array) $real_mime_types as $real )
if ( preg_match("#$pattern#", $real) && ( empty($matches[$type]) || false === array_search($real, $matches[$type]) ) )
$matches[$type][] = $real;
return $matches;
}
/**
* Convert MIME types into SQL.
*
* @since 2.5.0
*
* @param string|array $mime_types List of mime types or comma separated string of mime types.
* @return string The SQL AND clause for mime searching.
*/
function wp_post_mime_type_where($post_mime_types) {
$where = '';
$wildcards = array('', '%', '%/%');
if ( is_string($post_mime_types) )
$post_mime_types = array_map('trim', explode(',', $post_mime_types));
foreach ( (array) $post_mime_types as $mime_type ) {
$mime_type = preg_replace('/\s/', '', $mime_type);
$slashpos = strpos($mime_type, '/');
if ( false !== $slashpos ) {
$mime_group = preg_replace('/[^-*.a-zA-Z0-9]/', '', substr($mime_type, 0, $slashpos));
$mime_subgroup = preg_replace('/[^-*.a-zA-Z0-9]/', '', substr($mime_type, $slashpos + 1));
if ( empty($mime_subgroup) )
$mime_subgroup = '*';
else
$mime_subgroup = str_replace('/', '', $mime_subgroup);
$mime_pattern = "$mime_group/$mime_subgroup";
} else {
$mime_pattern = preg_replace('/[^-*.a-zA-Z0-9]/', '', $mime_type);
if ( false === strpos($mime_pattern, '*') )
$mime_pattern .= '/*';
}
$mime_pattern = preg_replace('/\*+/', '%', $mime_pattern);
if ( in_array( $mime_type, $wildcards ) )
return '';
if ( false !== strpos($mime_pattern, '%') )
$wheres[] = "post_mime_type LIKE '$mime_pattern'";
else
$wheres[] = "post_mime_type = '$mime_pattern'";
}
if ( !empty($wheres) )
$where = ' AND (' . join(' OR ', $wheres) . ') ';
return $where;
}
/**
* Removes a post, attachment, or page.
*
* When the post and page goes, everything that is tied to it is deleted also.
* This includes comments, post meta fields, and terms associated with the post.
*
* @since 1.0.0
* @uses do_action() Calls 'deleted_post' hook on post ID.
*
* @param int $postid Post ID.
* @return mixed
*/
function wp_delete_post($postid = 0) {
global $wpdb, $wp_rewrite;
if ( !$post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
return $post;
if ( 'attachment' == $post->post_type )
return wp_delete_attachment($postid);
do_action('delete_post', $postid);
/** @todo delete for pluggable post taxonomies too */
wp_delete_object_term_relationships($postid, array('category', 'post_tag'));
$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' ) );
}
// 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' ) );
$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid ));
$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE post_id = %d", $postid ));
if ( 'page' == $post->post_type ) {
clean_page_cache($postid);
foreach ( (array) $children as $child )
clean_page_cache($child->ID);
$wp_rewrite->flush_rules();
} else {
clean_post_cache($postid);
}
do_action('deleted_post', $postid);
return $post;
}
/**
* 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 override 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() ) {
$post_id = (int) $post_id;
$defaults = array('fields' => 'all');
$args = wp_parse_args( $args, $defaults );
$tags = wp_get_object_terms($post_id, 'post_tag', $args);
return $tags;
}
/**
* Retrieve number of recent posts.
*
* @since 1.0.0
* @uses $wpdb
*
* @param int $num Optional, default is 10. Number of posts to get.
* @return array List of posts.
*/
function wp_get_recent_posts($num = 10) {
global $wpdb;
// Set the limit clause, if we got a limit
$num = (int) $num;
if ($num) {
$limit = "LIMIT $num";
}
$sql = "SELECT * FROM $wpdb->posts WHERE post_type = 'post' ORDER BY post_date DESC $limit";
$result = $wpdb->get_results($sql,ARRAY_A);
return $result ? $result : array();
}
/**
* Retrieve a single post, based on post ID.
*
* Has categories in 'post_category' property or key. Has tags in 'tags_input'
* property or key.
*
* @since 1.0.0
*
* @param int $postid Post ID.
* @param string $mode How to return result, either OBJECT, ARRAY_N, or ARRAY_A.
* @return object|array Post object or array holding post contents and information
*/
function wp_get_single_post($postid = 0, $mode = OBJECT) {
$postid = (int) $postid;
$post = get_post($postid, $mode);
// Set categories and tags
if($mode == OBJECT) {
$post->post_category = wp_get_post_categories($postid);
$post->tags_input = wp_get_post_tags($postid, array('fields' => 'names'));
}
else {
$post['post_category'] = wp_get_post_categories($postid);
$post['tags_input'] = wp_get_post_tags($postid, array('fields' => 'names'));
}
return $post;
}
/**
* Insert a post.
*
* If the $postarr parameter has 'ID' set to a value, then post will be updated.
*
* You can set the post date manually, but setting the values for 'post_date'
* and 'post_date_gmt' keys. You can close the comments or open the comments by
* setting the value for 'comment_status' key.
*
* The defaults for the parameter $postarr are:
* 'post_status' - Default is 'draft'.
* 'post_type' - Default is 'post'.
* 'post_author' - Default is current user ID. 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
*
* @param array $postarr Optional. Override defaults.
* @param bool $wp_error Optional. Allow return of WP_Error on failure.
* @return int|WP_Error The value 0 or WP_Error on failure. The post ID on success.
*/
function wp_insert_post($postarr = array(), $wp_error = false) {
global $wpdb, $wp_rewrite, $user_ID;
$defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
'menu_order' => 0, 'to_ping' => '', 'pinged' => '', 'post_password' => '',
'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0);
$postarr = wp_parse_args($postarr, $defaults);
$postarr = sanitize_post($postarr, 'db');
// export array as variables
extract($postarr, EXTR_SKIP);
// Are we updating or creating?
$update = false;
if ( !empty($ID) ) {
$update = true;
$previous_status = get_post_field('post_status', $ID);
} else {
$previous_status = 'new';
}
if ( ('' == $post_content) && ('' == $post_title) && ('' == $post_excerpt) ) {
if ( $wp_error )
return new WP_Error('empty_content', __('Content, title, and excerpt are empty.'));
else
return 0;
}
// Make sure we set a valid category
if ( empty($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
$post_category = array(get_option('default_category'));
}
if ( empty($post_author) )
$post_author = $user_ID;
if ( empty($post_status) )
$post_status = 'draft';
if ( empty($post_type) )
$post_type = 'post';
$post_ID = 0;
// Get the post ID and GUID
if ( $update ) {
$post_ID = (int) $ID;
$guid = get_post_field( 'guid', $post_ID );
}
// Don't allow contributors to set to set the post slug for pending review posts
if ( 'pending' == $post_status && !current_user_can( 'publish_posts' ) )
$post_name = '';
// Create a valid post name. Drafts and pending posts are allowed to have an empty
// post name.
if ( empty($post_name) ) {
if ( !in_array( $post_status, array( 'draft', 'pending' ) ) )
$post_name = sanitize_title($post_title);
} else {
$post_name = sanitize_title($post_name);
}
// If the post date is empty (due to having been new or a draft) and status is not 'draft' or 'pending', set date to now
if ( empty($post_date) || '0000-00-00 00:00:00' == $post_date )
$post_date = current_time('mysql');
if ( empty($post_date_gmt) || '0000-00-00 00:00:00' == $post_date_gmt ) {
if ( !in_array( $post_status, array( 'draft', 'pending' ) ) )
$post_date_gmt = get_gmt_from_date($post_date);
else
$post_date_gmt = '0000-00-00 00:00:00';
}
if ( $update || '0000-00-00 00:00:00' == $post_date ) {
$post_modified = current_time( 'mysql' );
$post_modified_gmt = current_time( 'mysql', 1 );
} else {
$post_modified = $post_date;
$post_modified_gmt = $post_date_gmt;
}
if ( 'publish' == $post_status ) {
$now = gmdate('Y-m-d H:i:59');
if ( mysql2date('U', $post_date_gmt) > mysql2date('U', $now) )
$post_status = 'future';
}
if ( empty($comment_status) ) {
if ( $update )
$comment_status = 'closed';
else
$comment_status = get_option('default_comment_status');
}
if ( empty($ping_status) )
$ping_status = get_option('default_ping_status');
if ( isset($to_ping) )
$to_ping = preg_replace('|\s+|', "\n", $to_ping);
else
$to_ping = '';
if ( ! isset($pinged) )
$pinged = '';
if ( isset($post_parent) )
$post_parent = (int) $post_parent;
else
$post_parent = 0;
if ( isset($menu_order) )
$menu_order = (int) $menu_order;
else
$menu_order = 0;
if ( !isset($post_password) )
$post_password = '';
if ( !in_array( $post_status, array( 'draft', 'pending' ) ) ) {
$post_name_check = $wpdb->get_var($wpdb->prepare("SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d AND post_parent = %d LIMIT 1", $post_name, $post_type, $post_ID, $post_parent));
if ($post_name_check || in_array($post_name, $wp_rewrite->feeds) ) {
$suffix = 2;
do {
$alt_post_name = substr($post_name, 0, 200-(strlen($suffix)+1)). "-$suffix";
$post_name_check = $wpdb->get_var($wpdb->prepare("SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d AND post_parent = %d LIMIT 1", $alt_post_name, $post_type, $post_ID, $post_parent));
$suffix++;
} while ($post_name_check);
$post_name = $alt_post_name;
}
}
// 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' => $post_ID );
}
if ( empty($post_name) && !in_array( $post_status, array( 'draft', 'pending' ) ) ) {
$post_name = sanitize_title($post_title, $post_ID);
$wpdb->update( $wpdb->posts, compact( 'post_name' ), $where );
}
wp_set_post_categories( $post_ID, $post_category );
wp_set_post_tags( $post_ID, $tags_input );
$current_guid = get_post_field( 'guid', $post_ID );
if ( 'page' == $post_type )
clean_page_cache($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' == $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', $page_template);
}
wp_transition_post_status($post_status, $previous_status, $post);
if ( $update)
do_action('edit_post', $post_ID, $post);
do_action('save_post', $post_ID, $post);
do_action('wp_insert_post', $post_ID, $post);
return $post_ID;
}
/**
* Update a post with new post data.
*
* The date does not have to be set for drafts. You can set the date and it will
* not be overridden.
*
* @since 1.0.0
*
* @param array|object $postarr Post data.
* @return int 0 on failure, Post ID on success.
*/
function wp_update_post($postarr = array()) {
if ( is_object($postarr) )
$postarr = get_object_vars($postarr);
// First, get all of the original fields
$post = wp_get_single_post($postarr['ID'], ARRAY_A);
// Escape data pulled from DB.
$post = add_magic_quotes($post);
// Passed post category list overwrites existing category list if not empty.
if ( isset($postarr['post_category']) && is_array($postarr['post_category'])
&& 0 != count($postarr['post_category']) )
$post_cats = $postarr['post_category'];
else
$post_cats = $post['post_category'];
// Drafts shouldn't be assigned a date unless explicitly done so by the user
if ( in_array($post['post_status'], array('draft', 'pending')) && empty($postarr['edit_date']) &&
('0000-00-00 00:00:00' == $post['post_date_gmt']) )
$clear_date = true;
else
$clear_date = false;
// Merge old and new fields with new fields overwriting old ones.
$postarr = array_merge($post, $postarr);
$postarr['post_category'] = $post_cats;
if ( $clear_date ) {
$postarr['post_date'] = current_time('mysql');
$postarr['post_date_gmt'] = '';
}
if ($postarr['post_type'] == 'attachment')
return wp_insert_attachment($postarr);
return wp_insert_post($postarr);
}
/**
* Publish a post by transitioning the post status.
*
* @since 2.1.0
* @uses $wpdb
* @uses do_action() Calls 'edit_post', 'save_post', and 'wp_insert_post' on post_id and post data.
*
* @param int $post_id Post ID.
* @return null
*/
function wp_publish_post($post_id) {
global $wpdb;
$post = get_post($post_id);
if ( empty($post) )
return;
if ( 'publish' == $post->post_status )
return;
$wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post_id ) );
$old_status = $post->post_status;
$post->post_status = 'publish';
wp_transition_post_status('publish', $old_status, $post);
// Update counts for the post's terms.
foreach ( (array) get_object_taxonomies('post') as $taxonomy ) {
$terms = wp_get_object_terms($post_id, $taxonomy, 'fields=tt_ids');
wp_update_term_count($terms, $taxonomy);
}
do_action('edit_post', $post_id, $post);
do_action('save_post', $post_id, $post);
do_action('wp_insert_post', $post_id, $post);
}
/**
* Publish future post and make sure post ID has future post status.
*
* Invoked by cron 'publish_future_post' event. This safeguard prevents cron
* from publishing drafts, etc.
*
* @since 2.5.0
*
* @param int $post_id Post ID.
* @return null Nothing is returned. Which can mean that no action is required or post was published.
*/
function check_and_publish_future_post($post_id) {
$post = get_post($post_id);
if ( empty($post) )
return;
if ( 'future' != $post->post_status )
return;
$time = strtotime( $post->post_date_gmt . ' GMT' );
if ( $time > time() ) { // Uh oh, someone jumped the gun!
wp_clear_scheduled_hook( 'publish_future_post', $post_id ); // clear anything else in the system
wp_schedule_single_event( $time, 'publish_future_post', array( $post_id ) );
return;
}
return wp_publish_post($post_id);
}
/**
* Adds tags to a post.
*
* @uses wp_set_post_tags() Same first two parameters, but the last parameter is always set to true.
*
* @package WordPress
* @subpackage Post
* @since 2.3.0
*
* @param int $post_id Post ID
* @param string $tags The tags to set for the post, separated by commas.
* @return bool|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
*/
function wp_add_post_tags($post_id = 0, $tags = '') {
return wp_set_post_tags($post_id, $tags, true);
}
/**
* Set the tags for a post.
*
* @since 2.3.0
* @uses wp_set_object_terms() Sets the tags for the post.
*
* @param int $post_id Post ID.
* @param string $tags The tags to set for the post, separated by commas.
* @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
* @return bool|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
*/
function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
$post_id = (int) $post_id;
if ( !$post_id )
return false;
if ( empty($tags) )
$tags = array();
$tags = (is_array($tags)) ? $tags : explode( ',', trim($tags, " \n\t\r\0\x0B,") );
wp_set_object_terms($post_id, $tags, 'post_tag', $append);
}
/**
* Set categories for a post.
*
* If the post categories parameter is not set, then the default category is
* going used.
*
* @since 2.1.0
*
* @param int $post_ID Post ID.
* @param array $post_categories Optional. List of categories.
* @return bool|mixed
*/
function wp_set_post_categories($post_ID = 0, $post_categories = array()) {
$post_ID = (int) $post_ID;
// If $post_categories isn't already an array, make it one:
if (!is_array($post_categories) || 0 == count($post_categories) || empty($post_categories))
$post_categories = array(get_option('default_category'));
else if ( 1 == count($post_categories) && '' == $post_categories[0] )
return true;
$post_categories = array_map('intval', $post_categories);
$post_categories = array_unique($post_categories);
return wp_set_object_terms($post_ID, $post_categories, 'category');
}
/**
* Transition the post status of a post.
*
* Calls hooks to transition post status. If the new post status is not the same
* as the previous post status, then two hooks will be ran, 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 will run whether or not the post statuses are the same. The
* action is named 'NEWSTATUS_POSTTYPE', NEWSTATUS is from the $new_status
* parameter and POSTTYPE is post_type post data.
*
* @since 2.3.0
*
* @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) {
if ( $new_status != $old_status ) {
do_action('transition_post_status', $new_status, $old_status, $post);
do_action("${old_status}_to_$new_status", $post);
}
do_action("${new_status}_$post->post_type", $post->ID, $post);
}
//
// Trackback and ping functions
//
/**
* Add a URL to those already pung.
*
* @since 1.5.0
* @uses $wpdb
*
* @param int $post_id Post ID.
* @param string $uri Ping URI.
* @return int How many rows were updated.
*/
function add_ping($post_id, $uri) {
global $wpdb;
$pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
$pung = trim($pung);
$pung = preg_split('/\s/', $pung);
$pung[] = $uri;
$new = implode("\n", $pung);
$new = apply_filters('add_ping', $new);
// expected_slashed ($new)
$new = stripslashes($new);
return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) );
}
/**
* Retrieve enclosures already enclosed for a post.
*
* @since 1.5.0
* @uses $wpdb
*
* @param int $post_id Post ID.
* @return array List of enclosures
*/
function get_enclosed($post_id) {
$custom_fields = get_post_custom( $post_id );
$pung = array();
if ( !is_array( $custom_fields ) )
return $pung;
foreach ( $custom_fields as $key => $val ) {
if ( 'enclosure' != $key || !is_array( $val ) )
continue;
foreach( $val as $enc ) {
$enclosure = split( "\n", $enc );
$pung[] = trim( $enclosure[ 0 ] );
}
}
$pung = apply_filters('get_enclosed', $pung);
return $pung;
}
/**
* Retrieve URLs already pinged for a post.
*
* @since 1.5.0
* @uses $wpdb
*
* @param int $post_id Post ID.
* @return array
*/
function get_pung($post_id) {
global $wpdb;
$pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
$pung = trim($pung);
$pung = preg_split('/\s/', $pung);
$pung = apply_filters('get_pung', $pung);
return $pung;
}
/**
* Retrieve URLs that need to be pinged.
*
* @since 1.5.0
* @uses $wpdb
*
* @param int $post_id Post ID
* @return array
*/
function get_to_ping($post_id) {
global $wpdb;
$to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id ));
$to_ping = trim($to_ping);
$to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);
$to_ping = apply_filters('get_to_ping', $to_ping);
return $to_ping;
}
/**
* Do trackbacks for a list of URLs.
*
* @since 1.0.0
*
* @param string $tb_list Comma separated list of URLs
* @param int $post_id Post ID
*/
function trackback_url_list($tb_list, $post_id) {
if ( ! empty( $tb_list ) ) {
// get post data
$postdata = wp_get_single_post($post_id, ARRAY_A);
// import postdata as variables
extract($postdata, EXTR_SKIP);
// form an excerpt
$excerpt = strip_tags($post_excerpt ? $post_excerpt : $post_content);
if (strlen($excerpt) > 255) {
$excerpt = substr($excerpt,0,252) . '...';
}
$trackback_urls = explode(',', $tb_list);
foreach( (array) $trackback_urls as $tb_url) {
$tb_url = trim($tb_url);
trackback($tb_url, stripslashes($post_title), $excerpt, $post_id);
}
}
}
//
// Page functions
//
/**
* Get a list of page IDs.
*
* @since 2.0.0
* @uses $wpdb
*
* @return array List of page IDs.
*/
function get_all_page_ids() {
global $wpdb;
if ( ! $page_ids = wp_cache_get('all_page_ids', 'posts') ) {
$page_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type = 'page'");
wp_cache_add('all_page_ids', $page_ids, 'posts');
}
return $page_ids;
}
/**
* Retrieves page data given a page ID or page object.
*
* @since 1.5.1
*
* @param mixed $page Page object or page ID. Passed by reference.
* @param string $output What to output. OBJECT, ARRAY_A, or ARRAY_N.
* @param string $filter How the return value should be filtered.
* @return mixed Page data.
*/
function &get_page(&$page, $output = OBJECT, $filter = 'raw') {
if ( empty($page) ) {
if ( isset( $GLOBALS['page'] ) && isset( $GLOBALS['page']->ID ) ) {
return get_post($GLOBALS['page'], $output, $filter);
} else {
$page = null;
return $page;
}
}
return get_post($page, $output, $filter);
}
/**
* Retrieves a page given its path.
*
* @since 2.1.0
* @uses $wpdb
*
* @param string $page_path Page path
* @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A.
* @return mixed Null when complete.
*/
function get_page_by_path($page_path, $output = OBJECT) {
global $wpdb;
$page_path = rawurlencode(urldecode($page_path));
$page_path = str_replace('%2F', '/', $page_path);
$page_path = str_replace('%20', ' ', $page_path);
$page_paths = '/' . trim($page_path, '/');
$leaf_path = sanitize_title(basename($page_paths));
$page_paths = explode('/', $page_paths);
$full_path = '';
foreach( (array) $page_paths as $pathdir)
$full_path .= ($pathdir!=''?'/':'') . sanitize_title($pathdir);
$pages = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_name = %s AND (post_type = 'page' OR post_type = 'attachment')", $leaf_path ));
if ( empty($pages) )
return null;
foreach ($pages as $page) {
$path = '/' . $leaf_path;
$curpage = $page;
while ($curpage->post_parent != 0) {
$curpage = $wpdb->get_row( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE ID = %d and post_type='page'", $curpage->post_parent ));
$path = '/' . $curpage->post_name . $path;
}
if ( $path == $full_path )
return get_page($page->ID, $output);
}
return null;
}
/**
* Retrieve a page given its title.
*
* @since 2.1.0
* @uses $wpdb
*
* @param string $page_title Page title
* @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A.
* @return mixed
*/
function get_page_by_title($page_title, $output = OBJECT) {
global $wpdb;
$page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type='page'", $page_title ));
if ( $page )
return get_page($page, $output);
return null;
}
/**
* Retrieve child pages from list of pages matching page ID.
*
* Matches against the pages parameter against the page ID. Also matches all
* children for the same to retrieve all children of a page. Does not make any
* SQL queries to get the children.
*
* @since 1.5.1
*
* @param int $page_id Page ID.
* @param array $pages List of pages' objects.
* @return array
*/
function &get_page_children($page_id, $pages) {
$page_list = array();
foreach ( (array) $pages as $page ) {
if ( $page->post_parent == $page_id ) {
$page_list[] = $page;
if ( $children = get_page_children($page->ID, $pages) )
$page_list = array_merge($page_list, $children);
}
}
return $page_list;
}
/**
* Order the pages with children under parents in a flat list.
*
* Fetches the pages returned as a FLAT list, but arranged in order of their
* hierarchy, i.e., child parents immediately follow their parents.
*
* @since 2.0.0
*
* @param array $posts Posts array.
* @param int $parent Parent page ID.
* @return array
*/
function get_page_hierarchy($posts, $parent = 0) {
$result = array ( );
if ($posts) { foreach ( (array) $posts as $post) {
if ($post->post_parent == $parent) {
$result[$post->ID] = $post->post_name;
$children = get_page_hierarchy($posts, $post->ID);
$result += $children; //append $children to $result
}
} }
return $result;
}
/**
* Builds URI for a page.
*
* Sub pages will be in the "directory" under the parent page post name.
*
* @since 1.5.0
*
* @param int $page_id Page ID.
* @return string Page URI.
*/
function get_page_uri($page_id) {
$page = get_page($page_id);
$uri = $page->post_name;
// A page cannot be it's own parent.
if ( $page->post_parent == $page->ID )
return $uri;
while ($page->post_parent != 0) {
$page = get_page($page->post_parent);
$uri = $page->post_name . "/" . $uri;
}
return $uri;
}
/**
* Retrieve a list of pages.
*
* The defaults that can be overridden are the following: 'child_of',
* 'sort_order', 'sort_column', 'post_title', 'hierarchical', 'exclude',
* 'include', 'meta_key', 'meta_value', and 'authors'.
*
* @since 1.5.0
* @uses $wpdb
*
* @param mixed $args Optional. Array or string of options that overrides defaults.
* @return array List of pages matching defaults or $args
*/
function &get_pages($args = '') {
global $wpdb;
$defaults = array(
'child_of' => 0, 'sort_order' => 'ASC',
'sort_column' => 'post_title', 'hierarchical' => 1,
'exclude' => '', 'include' => '',
'meta_key' => '', 'meta_value' => '',
'authors' => '', 'parent' => -1
);
$r = wp_parse_args( $args, $defaults );
extract( $r, EXTR_SKIP );
$key = md5( serialize( $r ) );
if ( $cache = wp_cache_get( 'get_pages', 'posts' ) ) {
if ( isset( $cache[ $key ] ) ) {
$pages = apply_filters('get_pages', $cache[ $key ], $r );
return $pages;
}
}
$inclusions = '';
if ( !empty($include) ) {
$child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include
$parent = -1;
$exclude = '';
$meta_key = '';
$meta_value = '';
$hierarchical = false;
$incpages = preg_split('/[\s,]+/',$include);
if ( count($incpages) ) {
foreach ( $incpages as $incpage ) {
if (empty($inclusions))
$inclusions = $wpdb->prepare(' AND ( ID = %d ', $incpage);
else
$inclusions .= $wpdb->prepare(' OR ID = %d ', $incpage);
}
}
}
if (!empty($inclusions))
$inclusions .= ')';
$exclusions = '';
if ( !empty($exclude) ) {
$expages = preg_split('/[\s,]+/',$exclude);
if ( count($expages) ) {
foreach ( $expages as $expage ) {
if (empty($exclusions))
$exclusions = $wpdb->prepare(' AND ( ID <> %d ', $expage);
else
$exclusions .= $wpdb->prepare(' AND ID <> %d ', $expage);
}
}
}
if (!empty($exclusions))
$exclusions .= ')';
$author_query = '';
if (!empty($authors)) {
$post_authors = preg_split('/[\s,]+/',$authors);
if ( count($post_authors) ) {
foreach ( $post_authors as $post_author ) {
//Do we have an author id or an author login?
if ( 0 == intval($post_author) ) {
$post_author = get_userdatabylogin($post_author);
if ( empty($post_author) )
continue;
if ( empty($post_author->ID) )
continue;
$post_author = $post_author->ID;
}
if ( '' == $author_query )
$author_query = $wpdb->prepare(' post_author = %d ', $post_author);
else
$author_query .= $wpdb->prepare(' OR post_author = %d ', $post_author);
}
if ( '' != $author_query )
$author_query = " AND ($author_query)";
}
}
$join = '';
$where = "$exclusions $inclusions ";
if ( ! empty( $meta_key ) || ! empty( $meta_value ) ) {
$join = " LEFT JOIN $wpdb->postmeta ON ( $wpdb->posts.ID = $wpdb->postmeta.post_id )";
// meta_key and meta_value might be slashed
$meta_key = stripslashes($meta_key);
$meta_value = stripslashes($meta_value);
if ( ! empty( $meta_key ) )
$where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_key = %s", $meta_key);
if ( ! empty( $meta_value ) )
$where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_value = %s", $meta_value);
}
if ( $parent >= 0 )
$where .= $wpdb->prepare(' AND post_parent = %d ', $parent);
$query = "SELECT * FROM $wpdb->posts $join WHERE (post_type = 'page' AND post_status = 'publish') $where ";
$query .= $author_query;
$query .= " ORDER BY " . $sort_column . " " . $sort_order ;
$pages = $wpdb->get_results($query);
if ( empty($pages) )
return apply_filters('get_pages', array(), $r);
// Update cache.
update_page_cache($pages);
if ( $child_of || $hierarchical )
$pages = & get_page_children($child_of, $pages);
$cache[ $key ] = $pages;
wp_cache_set( 'get_pages', $cache, 'posts' );
$pages = apply_filters('get_pages', $pages, $r);
return $pages;
}
//
// Attachment functions
//
/**
* Check if the attachment URI is local one and is really an attachment.
*
* @since 2.0.0
*
* @param string $url URL to check
* @return bool True on success, false on failure.
*/
function is_local_attachment($url) {
if (strpos($url, get_bloginfo('url')) === false)
return false;
if (strpos($url, get_bloginfo('url') . '/?attachment_id=') !== false)
return true;
if ( $id = url_to_postid($url) ) {
$post = & get_post($id);
if ( 'attachment' == $post->post_type )
return true;
}
return false;
}
/**
* Insert an attachment.
*
* If you set the 'ID' in the $object parameter, it will mean that you are
* updating and attempt to update the attachment. You can also set the
* attachment name or title by setting the key 'post_name' or 'post_title'.
*
* You can set the dates for the attachment manually by setting the 'post_date'
* and 'post_date_gmt' keys' values.
*
* By default, the comments will use the default settings for whether the
* comments are allowed. You can close them manually or keep them open by
* setting the value for the 'comment_status' key.
*
* The $object parameter can have the following:
* 'post_status' - Default is 'draft'. Can not be override, 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
*
* @param string|array $object Arguments to override defaults.
* @param string $file Optional filename.
* @param int $post_parent Parent post ID.
* @return int Attachment ID.
*/
function wp_insert_attachment($object, $file = false, $parent = 0) {
global $wpdb, $user_ID;
$defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
'menu_order' => 0, 'to_ping' => '', 'pinged' => '', 'post_password' => '',
'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '');
$object = wp_parse_args($object, $defaults);
if ( !empty($parent) )
$object['post_parent'] = $parent;
$object = sanitize_post($object, 'db');
// export array as variables
extract($object, EXTR_SKIP);
// Make sure we set a valid category
if (0 == count($post_category) || !is_array($post_category)) {
$post_category = array(get_option('default_category'));
}
if ( empty($post_author) )
$post_author = $user_ID;
$post_type = 'attachment';
$post_status = 'inherit';
// Are we updating or creating?
$update = false;
if ( !empty($ID) ) {
$update = true;
$post_ID = (int) $ID;
}
// Create a valid post name.
if ( empty($post_name) )
$post_name = sanitize_title($post_title);
else
$post_name = sanitize_title($post_name);
// expected_slashed ($post_name)
$post_name_check = $wpdb->get_var( $wpdb->prepare( "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_status = 'inherit' AND ID != %d LIMIT 1", $post_name, $post_ID));
if ($post_name_check) {
$suffix = 2;
while ($post_name_check) {
$alt_post_name = $post_name . "-$suffix";
// expected_slashed ($alt_post_name, $post_name)
$post_name_check = $wpdb->get_var( $wpdb->prepare( "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_status = 'inherit' AND ID != %d AND post_parent = %d LIMIT 1", $alt_post_name, $post_ID, $post_parent));
$suffix++;
}
$post_name = $alt_post_name;
}
if ( empty($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 {
$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 ( $update) {
do_action('edit_attachment', $post_ID);
} else {
do_action('add_attachment', $post_ID);
}
return $post_ID;
}
/**
* Delete an attachment.
*
* Will remove the file also, when the attachment is removed. Removes all post
* meta fields, taxonomy, comments, etc associated with the attachment (except
* the main post).
*
* @since 2.0.0
* @uses $wpdb
* @uses do_action() Calls 'delete_attachment' hook on Attachment ID.
*
* @param int $postid Attachment ID.
* @return mixed False on failure. Post data on success.
*/
function wp_delete_attachment($postid) {
global $wpdb;
if ( !$post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
return $post;
if ( 'attachment' != $post->post_type )
return false;
$meta = wp_get_attachment_metadata( $postid );
$file = get_attached_file( $postid );
/** @todo Delete for pluggable post taxonomies too */
wp_delete_object_term_relationships($postid, array('category', 'post_tag'));
$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid ));
$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE post_id = %d ", $postid ));
if ( ! empty($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'].'%', $postid)) ) {
$thumbfile = str_replace(basename($file), $meta['thumb'], $file);
$thumbfile = apply_filters('wp_delete_file', $thumbfile);
@ unlink($thumbfile);
}
}
// remove intermediate images if there are any
$sizes = apply_filters('intermediate_image_sizes', array('thumbnail', 'medium', 'large'));
foreach ( $sizes as $size ) {
if ( $intermediate = image_get_intermediate_size($postid, $size) ) {
$intermediate_file = apply_filters('wp_delete_file', $intermediate['path']);
@ unlink($intermediate_file);
}
}
$file = apply_filters('wp_delete_file', $file);
if ( ! empty($file) )
@ unlink($file);
clean_post_cache($postid);
do_action('delete_attachment', $postid);
return $post;
}
/**
* Retrieve attachment meta field for attachment ID.
*
* @since 2.1.0
*
* @param int $post_id Attachment ID
* @param bool $unfiltered Optional, default is false. If true, filters are not run.
* @return string|bool Attachment meta field. False on failure.
*/
function wp_get_attachment_metadata( $post_id, $unfiltered = false ) {
$post_id = (int) $post_id;
if ( !$post =& get_post( $post_id ) )
return false;
$data = get_post_meta( $post->ID, '_wp_attachment_metadata', true );
if ( $unfiltered )
return $data;
return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID );
}
/**
* Update metadata for an attachment.
*
* @since 2.1.0
*
* @param int $post_id Attachment ID.
* @param array $data Attachment data.
* @return int
*/
function wp_update_attachment_metadata( $post_id, $data ) {
$post_id = (int) $post_id;
if ( !$post =& get_post( $post_id ) )
return false;
$data = apply_filters( 'wp_update_attachment_metadata', $data, $post->ID );
return update_post_meta( $post->ID, '_wp_attachment_metadata', $data);
}
/**
* Retrieve the URL for an attachment.
*
* @since 2.1.0
*
* @param int $post_id Attachment ID.
* @return string
*/
function wp_get_attachment_url( $post_id = 0 ) {
$post_id = (int) $post_id;
if ( !$post =& get_post( $post_id ) )
return false;
$url = '';
if ( $file = get_post_meta( $post->ID, '_wp_attached_file', true) ) { //Get attached file
if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { //Get upload directory
if ( 0 === strpos($file, $uploads['basedir']) ) //Check that the upload base exists in the file location
$url = str_replace($uploads['basedir'], $uploads['baseurl'], $file); //replace file location with url location
}
}
if ( empty($url) ) //If any of the above options failed, Fallback on the GUID as used pre-2.7, not recomended to rely upon this.
$url = get_the_guid( $post->ID );
if ( 'attachment' != $post->post_type || empty($url) )
return false;
return apply_filters( 'wp_get_attachment_url', $url, $post->ID );
}
/**
* Retrieve thumbnail for an attachment.
*
* @since 2.1.0
*
* @param int $post_id Attachment ID.
* @return mixed False on failure. Thumbnail file path on success.
*/
function wp_get_attachment_thumb_file( $post_id = 0 ) {
$post_id = (int) $post_id;
if ( !$post =& get_post( $post_id ) )
return false;
if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) )
return false;
$file = get_attached_file( $post->ID );
if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) )
return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID );
return false;
}
/**
* Retrieve URL for an attachment thumbnail.
*
* @since 2.1.0
*
* @param int $post_id Attachment ID
* @return string|bool False on failure. Thumbnail URL on success.
*/
function wp_get_attachment_thumb_url( $post_id = 0 ) {
$post_id = (int) $post_id;
if ( !$post =& get_post( $post_id ) )
return false;
if ( !$url = wp_get_attachment_url( $post->ID ) )
return false;
$sized = image_downsize( $post_id, 'thumbnail' );
if ( $sized )
return $sized[0];
if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
return false;
$url = str_replace(basename($url), basename($thumb), $url);
return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
}
/**
* Check if the attachment is an image.
*
* @since 2.1.0
*
* @param int $post_id Attachment ID
* @return bool
*/
function wp_attachment_is_image( $post_id = 0 ) {
$post_id = (int) $post_id;
if ( !$post =& get_post( $post_id ) )
return false;
if ( !$file = get_attached_file( $post->ID ) )
return false;
$ext = preg_match('/\.([^.]+)$/', $file, $matches) ? strtolower($matches[1]) : false;
$image_exts = array('jpg', 'jpeg', 'gif', 'png');
if ( 'image/' == substr($post->post_mime_type, 0, 6) || $ext && 'import' == $post->post_mime_type && in_array($ext, $image_exts) )
return true;
return false;
}
/**
* Retrieve the icon for a MIME type.
*
* @since 2.1.0
*
* @param string $mime MIME type
* @return string|bool
*/
function wp_mime_type_icon( $mime = 0 ) {
if ( !is_numeric($mime) )
$icon = wp_cache_get("mime_type_icon_$mime");
if ( empty($icon) ) {
$post_id = 0;
$post_mimes = array();
if ( is_numeric($mime) ) {
$mime = (int) $mime;
if ( $post =& get_post( $mime ) ) {
$post_id = (int) $post->ID;
$ext = preg_replace('/^.+?\.([^.]+)$/', '$1', $post->guid);
if ( !empty($ext) ) {
$post_mimes[] = $ext;
if ( $ext_type = wp_ext2type( $ext ) )
$post_mimes[] = $ext_type;
}
$mime = $post->post_mime_type;
} else {
$mime = 0;
}
} else {
$post_mimes[] = $mime;
}
$icon_files = wp_cache_get('icon_files');
if ( !is_array($icon_files) ) {
$icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
$icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url('images/crystal') );
$dirs = apply_filters( 'icon_dirs', array($icon_dir => $icon_dir_uri) );
$icon_files = array();
while ( $dirs ) {
$dir = array_shift($keys = array_keys($dirs));
$uri = array_shift($dirs);
if ( $dh = opendir($dir) ) {
while ( false !== $file = readdir($dh) ) {
$file = basename($file);
if ( substr($file, 0, 1) == '.' )
continue;
if ( !in_array(strtolower(substr($file, -4)), array('.png', '.gif', '.jpg') ) ) {
if ( is_dir("$dir/$file") )
$dirs["$dir/$file"] = "$uri/$file";
continue;
}
$icon_files["$dir/$file"] = "$uri/$file";
}
closedir($dh);
}
}
wp_cache_set('icon_files', $icon_files, 600);
}
// Icon basename - extension = MIME wildcard
foreach ( $icon_files as $file => $uri )
$types[ preg_replace('/^([^.]*).*$/', '$1', basename($file)) ] =& $icon_files[$file];
if ( ! empty($mime) ) {
$post_mimes[] = substr($mime, 0, strpos($mime, '/'));
$post_mimes[] = substr($mime, strpos($mime, '/') + 1);
$post_mimes[] = str_replace('/', '_', $mime);
}
$matches = wp_match_mime_types(array_keys($types), $post_mimes);
$matches['default'] = array('default');
foreach ( $matches as $match => $wilds ) {
if ( isset($types[$wilds[0]])) {
$icon = $types[$wilds[0]];
if ( !is_numeric($mime) )
wp_cache_set("mime_type_icon_$mime", $icon);
break;
}
}
}
return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id ); // Last arg is 0 if function pass mime type.
}
/**
* Checked for changed slugs for published posts and save old slug.
*
* The function is used along with form POST data. It checks for the wp-old-slug
* POST field. Will only be concerned with published posts and the slug actually
* changing.
*
* If the slug was changed and not already part of the old slugs then it will be
* added to the post meta field ('_wp_old_slug') for storing old slugs for that
* post.
*
* The most logically usage of this function is redirecting changed posts, so
* that those that linked to an changed post will be redirected to the new post.
*
* @since 2.1.0
*
* @param int $post_id Post ID.
* @return int Same as $post_id
*/
function wp_check_for_changed_slugs($post_id) {
if ( !isset($_POST['wp-old-slug']) || !strlen($_POST['wp-old-slug']) )
return $post_id;
$post = &get_post($post_id);
// we're only concerned with published posts
if ( $post->post_status != 'publish' || $post->post_type != 'post' )
return $post_id;
// only bother if the slug has changed
if ( $post->post_name == $_POST['wp-old-slug'] )
return $post_id;
$old_slugs = (array) get_post_meta($post_id, '_wp_old_slug');
// if we haven't added this old slug before, add it now
if ( !count($old_slugs) || !in_array($_POST['wp-old-slug'], $old_slugs) )
add_post_meta($post_id, '_wp_old_slug', $_POST['wp-old-slug']);
// if the new slug was used previously, delete it from the list
if ( in_array($post->post_name, $old_slugs) )
delete_post_meta($post_id, '_wp_old_slug', $post->post_name);
return $post_id;
}
/**
* Retrieve the private post SQL based on capability.
*
* This function provides a standardized way to appropriately select on the
* post_status of posts/pages. The function will return a piece of SQL code that
* can be added to a WHERE clause; this SQL is constructed to allow all
* published posts, and all private posts to which the user has access.
*
* It also allows plugins that define their own post type to control the cap by
* using the hook 'pub_priv_sql_capability'. The plugin is expected to return
* the capability the user must have to read the private post type.
*
* @since 2.2.0
*
* @uses $user_ID
* @uses apply_filters() Call 'pub_priv_sql_capability' filter for plugins with different post types.
*
* @param string $post_type currently only supports 'post' or 'page'.
* @return string SQL code that can be added to a where clause.
*/
function get_private_posts_cap_sql($post_type) {
global $user_ID;
$cap = '';
// Private posts
if ($post_type == 'post') {
$cap = 'read_private_posts';
// Private pages
} elseif ($post_type == 'page') {
$cap = 'read_private_pages';
// Dunno what it is, maybe plugins have their own post type?
} else {
$cap = apply_filters('pub_priv_sql_capability', $cap);
if (empty($cap)) {
// We don't know what it is, filters don't change anything,
// so set the SQL up to return nothing.
return '1 = 0';
}
}
$sql = '(post_status = \'publish\'';
if (current_user_can($cap)) {
// Does the user have the capability to view private posts? Guess so.
$sql .= ' OR post_status = \'private\'';
} elseif (is_user_logged_in()) {
// Users can view their own private posts.
$sql .= ' OR post_status = \'private\' AND post_author = \'' . $user_ID . '\'';
}
$sql .= ')';
return $sql;
}
/**
* Retrieve the date the the last post was published.
*
* The server timezone is the default and is the difference between GMT and
* server time. The 'blog' value is the date when the last post was posted. The
* 'gmt' is when the last post was posted in GMT formatted date.
*
* @since 0.71
*
* @uses $wpdb
* @uses $blog_id
* @uses apply_filters() Calls 'get_lastpostdate' filter
*
* @global mixed $cache_lastpostdate Stores the last post date
* @global mixed $pagenow The current page being viewed
*
* @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
* @return string The date of the last post.
*/
function get_lastpostdate($timezone = 'server') {
global $cache_lastpostdate, $wpdb, $blog_id;
$add_seconds_server = date('Z');
if ( !isset($cache_lastpostdate[$blog_id][$timezone]) ) {
switch(strtolower($timezone)) {
case 'gmt':
$lastpostdate = $wpdb->get_var("SELECT post_date_gmt FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
break;
case 'blog':
$lastpostdate = $wpdb->get_var("SELECT post_date FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
break;
case 'server':
$lastpostdate = $wpdb->get_var("SELECT DATE_ADD(post_date_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
break;
}
$cache_lastpostdate[$blog_id][$timezone] = $lastpostdate;
} else {
$lastpostdate = $cache_lastpostdate[$blog_id][$timezone];
}
return apply_filters( 'get_lastpostdate', $lastpostdate, $timezone );
}
/**
* Retrieve last post modified date depending on timezone.
*
* The server timezone is the default and is the difference between GMT and
* server time. The 'blog' value is just when the last post was modified. The
* 'gmt' is when the last post was modified in GMT time.
*
* @since 1.2.0
* @uses $wpdb
* @uses $blog_id
* @uses apply_filters() Calls 'get_lastpostmodified' filter
*
* @global mixed $cache_lastpostmodified Stores the date the last post was modified
*
* @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
* @return string The date the post was last modified.
*/
function get_lastpostmodified($timezone = 'server') {
global $cache_lastpostmodified, $wpdb, $blog_id;
$add_seconds_server = date('Z');
if ( !isset($cache_lastpostmodified[$blog_id][$timezone]) ) {
switch(strtolower($timezone)) {
case 'gmt':
$lastpostmodified = $wpdb->get_var("SELECT post_modified_gmt FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
case 'blog':
$lastpostmodified = $wpdb->get_var("SELECT post_modified FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
case 'server':
$lastpostmodified = $wpdb->get_var("SELECT DATE_ADD(post_modified_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
}
$lastpostdate = get_lastpostdate($timezone);
if ( $lastpostdate > $lastpostmodified ) {
$lastpostmodified = $lastpostdate;
}
$cache_lastpostmodified[$blog_id][$timezone] = $lastpostmodified;
} else {
$lastpostmodified = $cache_lastpostmodified[$blog_id][$timezone];
}
return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
}
/**
* Updates posts in cache.
*
* @usedby update_page_cache() Aliased by this function.
*
* @package WordPress
* @subpackage Cache
* @since 1.5.1
*
* @param array $posts Array of post objects
*/
function update_post_cache(&$posts) {
if ( !$posts )
return;
foreach ( $posts as $post )
wp_cache_add($post->ID, $post, 'posts');
}
/**
* Will clean the post in the cache.
*
* Cleaning means delete from the cache of the post. Will call to clean the term
* object cache associated with the post ID.
*
* @package WordPress
* @subpackage Cache
* @since 2.0.0
*
* @uses do_action() Will call the 'clean_post_cache' hook action.
*
* @param int $id The Post ID in the cache to clean
*/
function clean_post_cache($id) {
global $_wp_suspend_cache_invalidation, $wpdb;
if ( !empty($_wp_suspend_cache_invalidation) )
return;
$id = (int) $id;
wp_cache_delete($id, 'posts');
wp_cache_delete($id, 'post_meta');
clean_object_term_cache($id, 'post');
wp_cache_delete( 'wp_get_archives', 'general' );
do_action('clean_post_cache', $id);
if ( $children = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_parent = %d", $id) ) ) {
foreach( $children as $cid )
clean_post_cache( $cid );
}
}
/**
* Alias of update_post_cache().
*
* @see update_post_cache() Posts and pages are the same, alias is intentional
*
* @package WordPress
* @subpackage Cache
* @since 1.5.1
*
* @param array $pages list of page objects
*/
function update_page_cache(&$pages) {
update_post_cache($pages);
}
/**
* Will clean the page in the cache.
*
* Clean (read: delete) page from cache that matches $id. Will also clean cache
* associated with 'all_page_ids' and 'get_pages'.
*
* @package WordPress
* @subpackage Cache
* @since 2.0.0
*
* @uses do_action() Will call the 'clean_page_cache' hook action.
*
* @param int $id Page ID to clean
*/
function clean_page_cache($id) {
clean_post_cache($id);
wp_cache_delete( 'all_page_ids', 'posts' );
wp_cache_delete( 'get_pages', 'posts' );
do_action('clean_page_cache', $id);
}
/**
* Call major cache updating functions for list of Post objects.
*
* @package WordPress
* @subpackage Cache
* @since 1.5.0
*
* @uses $wpdb
* @uses update_post_cache()
* @uses update_object_term_cache()
* @uses update_postmeta_cache()
*
* @param array $posts Array of Post objects
*/
function update_post_caches(&$posts) {
// No point in doing all this work if we didn't match any posts.
if ( !$posts )
return;
update_post_cache($posts);
$post_ids = array();
for ($i = 0; $i < count($posts); $i++)
$post_ids[] = $posts[$i]->ID;
update_object_term_cache($post_ids, 'post');
update_postmeta_cache($post_ids);
}
/**
* Updates metadata cache for list of post IDs.
*
* Performs SQL query to retrieve the metadata for the post IDs and updates the
* metadata cache for the posts. Therefore, the functions, which call this
* function, do not need to perform SQL queries on their own.
*
* @package WordPress
* @subpackage Cache
* @since 2.1.0
*
* @uses $wpdb
*
* @param array $post_ids List of post IDs.
* @return bool|array Returns false if there is nothing to update or an array of metadata.
*/
function update_postmeta_cache($post_ids) {
global $wpdb;
if ( empty( $post_ids ) )
return false;
if ( !is_array($post_ids) ) {
$post_ids = preg_replace('|[^0-9,]|', '', $post_ids);
$post_ids = explode(',', $post_ids);
}
$post_ids = array_map('intval', $post_ids);
$ids = array();
foreach ( (array) $post_ids as $id ) {
if ( false === wp_cache_get($id, 'post_meta') )
$ids[] = $id;
}
if ( empty( $ids ) )
return false;
// Get post-meta info
$id_list = join(',', $ids);
$cache = array();
if ( $meta_list = $wpdb->get_results("SELECT post_id, meta_key, meta_value FROM $wpdb->postmeta WHERE post_id IN ($id_list)", ARRAY_A) ) {
foreach ( (array) $meta_list as $metarow) {
$mpid = (int) $metarow['post_id'];
$mkey = $metarow['meta_key'];
$mval = $metarow['meta_value'];
// Force subkeys to be array type:
if ( !isset($cache[$mpid]) || !is_array($cache[$mpid]) )
$cache[$mpid] = array();
if ( !isset($cache[$mpid][$mkey]) || !is_array($cache[$mpid][$mkey]) )
$cache[$mpid][$mkey] = array();
// Add a value to the current pid/key:
$cache[$mpid][$mkey][] = $mval;
}
}
foreach ( (array) $ids as $id ) {
if ( ! isset($cache[$id]) )
$cache[$id] = array();
}
foreach ( (array) array_keys($cache) as $post)
wp_cache_set($post, $cache[$post], 'post_meta');
return $cache;
}
//
// Hooks
//
/**
* Hook for managing future post transitions to published.
*
* @since 2.3.0
* @access private
* @uses $wpdb
*
* @param string $new_status New post status
* @param string $old_status Previous post status
* @param object $post Object type containing the post information
*/
function _transition_post_status($new_status, $old_status, $post) {
global $wpdb;
if ( $old_status != 'publish' && $new_status == 'publish' ) {
// Reset GUID if transitioning to publish and it is empty
if ( '' == get_the_guid($post->ID) )
$wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
do_action('private_to_published', $post->ID); // Deprecated, use private_to_publish
}
// Always clears the hook in case the post status bounced from future to draft.
wp_clear_scheduled_hook('publish_future_post', $post->ID);
}
/**
* Hook used to schedule publication for a post marked for the future.
*
* The $post properties used and must exist are 'ID' and 'post_date_gmt'.
*
* @since 2.3.0
*
* @param int $deprecated Not Used. Can be set to null.
* @param object $post Object type containing the post information
*/
function _future_post_hook($deprecated = '', $post) {
wp_clear_scheduled_hook( 'publish_future_post', $post->ID );
wp_schedule_single_event(strtotime($post->post_date_gmt. ' GMT'), 'publish_future_post', array($post->ID));
}
/**
* Hook to schedule pings and enclosures when a post is published.
*
* @since 2.3.0
* @uses $wpdb
* @uses XMLRPC_REQUEST
* @uses APP_REQUEST
* @uses do_action Calls 'xmlprc_publish_post' action if XMLRPC_REQUEST is defined. Calls 'app_publish_post'
* action 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' ) );
$wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_encloseme' ) );
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
* @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;
$wp_rewrite->flush_rules();
}
} else {
clean_post_cache($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.
*
* @access private
* @since unknown
* @uses $wpdb
*
* @param object $_post Post data.
* @return null When nothing needs to be done.
*/
function _get_post_ancestors(&$_post) {
global $wpdb;
if ( isset($_post->ancestors) )
return;
$_post->ancestors = array();
if ( empty($_post->post_parent) || $_post->ID == $_post->post_parent )
return;
$id = $_post->ancestors[] = $_post->post_parent;
while ( $ancestor = $wpdb->get_var( $wpdb->prepare("SELECT `post_parent` FROM $wpdb->posts WHERE ID = %d LIMIT 1", $id) ) ) {
if ( $id == $ancestor )
break;
$id = $_post->ancestors[] = $ancestor;
}
}
/**
* Determines which fields of posts are to be saved in revisions.
*
* Does two things. If passed a post *array*, it will return a post array ready
* to be insterted into the posts table as a post revision. Otherwise, returns
* an array whose keys are the post fields to be saved for post revisions.
*
* @package WordPress
* @subpackage Post_Revisions
* @since 2.6.0
* @access private
*
* @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'] = $post['post_modified'];
$return['post_date_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( $post_id ) {
// We do autosaves manually with wp_create_post_autosave()
if ( @constant( 'DOING_AUTOSAVE' ) )
return;
// WP_POST_REVISIONS = 0, false
if ( !constant('WP_POST_REVISIONS') )
return;
if ( !$post = get_post( $post_id, ARRAY_A ) )
return;
if ( !in_array( $post['post_type'], array( 'post', 'page' ) ) )
return;
$return = _wp_put_post_revision( $post );
// WP_POST_REVISIONS = true (default), -1
if ( !is_numeric( WP_POST_REVISIONS ) || WP_POST_REVISIONS < 0 )
return $return;
// all revisions and (possibly) one autosave
$revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) );
// WP_POST_REVISIONS = (int) (# of autasaves to save)
$delete = count($revisions) - WP_POST_REVISIONS;
if ( $delete < 1 )
return $return;
$revisions = array_slice( $revisions, 0, $delete );
for ( $i = 0; isset($revisions[$i]); $i++ ) {
if ( false !== strpos( $revisions[$i]->post_name, 'autosave' ) )
continue;
wp_delete_post_revision( $revisions[$i]->ID );
}
return $return;
}
/**
* Retrieve the autosaved data of the specified post.
*
* Returns a post object containing the information that was autosaved for the
* specified post.
*
* @package WordPress
* @subpackage Post_Revisions
* @since 2.6.0
*
* @param int $post_id The post ID.
* @return object|bool The autosaved data or false on failure or when no autosave exists.
*/
function wp_get_post_autosave( $post_id ) {
global $wpdb;
if ( !$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 );
$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 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()
*
* @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'];
$post_id = wp_update_post( $update );
if ( is_wp_error( $post_id ) )
return $post_id;
if ( $post_id )
do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] );
return $post_id;
}
/**
* Deletes a revision.
*
* Deletes the row from the posts table corresponding to the specified revision.
*
* @package WordPress
* @subpackage Post_Revisions
* @since 2.6.0
*
* @uses wp_get_post_revision()
* @uses wp_delete_post()
*
* @param int|object $revision_id Revision ID or revision object.
* @param array $fields Optional. What fields to restore from. Defaults to all.
* @return mixed Null if error, false if no fields to restore, (int) post ID if success.
*/
function wp_delete_post_revision( $revision_id ) {
if ( !$revision = wp_get_post_revision( $revision_id ) )
return $revision;
$delete = wp_delete_post( $revision->ID );
if ( is_wp_error( $delete ) )
return $delete;
if ( $delete )
do_action( 'wp_delete_post_revision', $revision->ID, $revision );
return $delete;
}
/**
* Returns all revisions of specified post.
*
* @package WordPress
* @subpackage Post_Revisions
* @since 2.6.0
*
* @uses get_children()
*
* @param int|object $post_id Post ID or post object
* @return array empty if no revisions
*/
function wp_get_post_revisions( $post_id = 0, $args = null ) {
if ( !constant('WP_POST_REVISIONS') )
return array();
if ( ( !$post = get_post( $post_id ) ) || empty( $post->ID ) )
return array();
$defaults = array( 'order' => 'DESC', 'orderby' => 'date' );
$args = wp_parse_args( $args, $defaults );
$args = array_merge( $args, array( 'post_parent' => $post->ID, 'post_type' => 'revision', 'post_status' => 'inherit' ) );
if ( !$revisions = get_children( $args ) )
return array();
return $revisions;
}
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