3 * Post functions and post utility function.
11 // Post Type Registration
15 * Creates the initial post types when 'init' action is fired.
19 function create_initial_post_types() {
20 register_post_type( 'post', array(
22 'name_admin_bar' => _x( 'Post', 'add new on admin bar' ),
25 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
26 '_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
27 'capability_type' => 'post',
28 'map_meta_cap' => true,
29 'hierarchical' => false,
32 'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'post-formats' ),
35 register_post_type( 'page', array(
37 'name_admin_bar' => _x( 'Page', 'add new on admin bar' ),
40 'publicly_queryable' => false,
41 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
42 '_edit_link' => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
43 'capability_type' => 'page',
44 'map_meta_cap' => true,
45 'hierarchical' => true,
48 'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'page-attributes', 'custom-fields', 'comments', 'revisions' ),
51 register_post_type( 'attachment', array(
53 'name' => __( 'Media' ),
57 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
58 '_edit_link' => 'media.php?attachment_id=%d', /* internal use only. don't use this when registering your own post type. */
59 'capability_type' => 'post',
60 'map_meta_cap' => true,
61 'hierarchical' => false,
64 'show_in_nav_menus' => false,
65 'supports' => array( 'comments' ),
68 register_post_type( 'revision', array(
70 'name' => __( 'Revisions' ),
71 'singular_name' => __( 'Revision' ),
74 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
75 '_edit_link' => 'revision.php?revision=%d', /* internal use only. don't use this when registering your own post type. */
76 'capability_type' => 'post',
77 'map_meta_cap' => true,
78 'hierarchical' => false,
81 'can_export' => false,
84 register_post_type( 'nav_menu_item', array(
86 'name' => __( 'Navigation Menu Items' ),
87 'singular_name' => __( 'Navigation Menu Item' ),
90 '_builtin' => true, /* internal use only. don't use this when registering your own post type. */
91 'hierarchical' => false,
96 register_post_status( 'publish', array(
97 'label' => _x( 'Published', 'post' ),
99 '_builtin' => true, /* internal use only. */
100 'label_count' => _n_noop( 'Published <span class="count">(%s)</span>', 'Published <span class="count">(%s)</span>' ),
103 register_post_status( 'future', array(
104 'label' => _x( 'Scheduled', 'post' ),
106 '_builtin' => true, /* internal use only. */
107 'label_count' => _n_noop('Scheduled <span class="count">(%s)</span>', 'Scheduled <span class="count">(%s)</span>' ),
110 register_post_status( 'draft', array(
111 'label' => _x( 'Draft', 'post' ),
113 '_builtin' => true, /* internal use only. */
114 'label_count' => _n_noop( 'Draft <span class="count">(%s)</span>', 'Drafts <span class="count">(%s)</span>' ),
117 register_post_status( 'pending', array(
118 'label' => _x( 'Pending', 'post' ),
120 '_builtin' => true, /* internal use only. */
121 'label_count' => _n_noop( 'Pending <span class="count">(%s)</span>', 'Pending <span class="count">(%s)</span>' ),
124 register_post_status( 'private', array(
125 'label' => _x( 'Private', 'post' ),
127 '_builtin' => true, /* internal use only. */
128 'label_count' => _n_noop( 'Private <span class="count">(%s)</span>', 'Private <span class="count">(%s)</span>' ),
131 register_post_status( 'trash', array(
132 'label' => _x( 'Trash', 'post' ),
134 '_builtin' => true, /* internal use only. */
135 'label_count' => _n_noop( 'Trash <span class="count">(%s)</span>', 'Trash <span class="count">(%s)</span>' ),
136 'show_in_admin_status_list' => true,
139 register_post_status( 'auto-draft', array(
140 'label' => 'auto-draft',
142 '_builtin' => true, /* internal use only. */
145 register_post_status( 'inherit', array(
146 'label' => 'inherit',
148 '_builtin' => true, /* internal use only. */
149 'exclude_from_search' => false,
152 add_action( 'init', 'create_initial_post_types', 0 ); // highest priority
155 * Retrieve attached file path based on attachment ID.
157 * You can optionally send it through the 'get_attached_file' filter, but by
158 * default it will just return the file path unfiltered.
160 * The function works by getting the single post meta name, named
161 * '_wp_attached_file' and returning it. This is a convenience function to
162 * prevent looking up the meta name and provide a mechanism for sending the
163 * attached filename through a filter.
166 * @uses apply_filters() Calls 'get_attached_file' on file path and attachment ID.
168 * @param int $attachment_id Attachment ID.
169 * @param bool $unfiltered Whether to apply filters.
170 * @return string The file path to the attached file.
172 function get_attached_file( $attachment_id, $unfiltered = false ) {
173 $file = get_post_meta( $attachment_id, '_wp_attached_file', true );
174 // If the file is relative, prepend upload dir
175 if ( 0 !== strpos($file, '/') && !preg_match('|^.:\\\|', $file) && ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) )
176 $file = $uploads['basedir'] . "/$file";
179 return apply_filters( 'get_attached_file', $file, $attachment_id );
183 * Update attachment file path based on attachment ID.
185 * Used to update the file path of the attachment, which uses post meta name
186 * '_wp_attached_file' to store the path of the attachment.
189 * @uses apply_filters() Calls 'update_attached_file' on file path and attachment ID.
191 * @param int $attachment_id Attachment ID
192 * @param string $file File path for the attachment
193 * @return bool False on failure, true on success.
195 function update_attached_file( $attachment_id, $file ) {
196 if ( !get_post( $attachment_id ) )
199 $file = apply_filters( 'update_attached_file', $file, $attachment_id );
200 $file = _wp_relative_upload_path($file);
202 return update_post_meta( $attachment_id, '_wp_attached_file', $file );
206 * Return relative path to an uploaded file.
208 * The path is relative to the current upload dir.
211 * @uses apply_filters() Calls '_wp_relative_upload_path' on file path.
213 * @param string $path Full path to the file
214 * @return string relative path on success, unchanged path on failure.
216 function _wp_relative_upload_path( $path ) {
219 if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) {
220 if ( 0 === strpos($new_path, $uploads['basedir']) ) {
221 $new_path = str_replace($uploads['basedir'], '', $new_path);
222 $new_path = ltrim($new_path, '/');
226 return apply_filters( '_wp_relative_upload_path', $new_path, $path );
230 * Retrieve all children of the post parent ID.
232 * Normally, without any enhancements, the children would apply to pages. In the
233 * context of the inner workings of WordPress, pages, posts, and attachments
234 * share the same table, so therefore the functionality could apply to any one
235 * of them. It is then noted that while this function does not work on posts, it
236 * does not mean that it won't work on posts. It is recommended that you know
237 * what context you wish to retrieve the children of.
239 * Attachments may also be made the child of a post, so if that is an accurate
240 * statement (which needs to be verified), it would then be possible to get
241 * all of the attachments for a post. Attachments have since changed since
242 * version 2.5, so this is most likely unaccurate, but serves generally as an
243 * example of what is possible.
245 * The arguments listed as defaults are for this function and also of the
246 * {@link get_posts()} function. The arguments are combined with the
247 * get_children defaults and are then passed to the {@link get_posts()}
248 * function, which accepts additional arguments. You can replace the defaults in
249 * this function, listed below and the additional arguments listed in the
250 * {@link get_posts()} function.
252 * The 'post_parent' is the most important argument and important attention
253 * needs to be paid to the $args parameter. If you pass either an object or an
254 * integer (number), then just the 'post_parent' is grabbed and everything else
255 * is lost. If you don't specify any arguments, then it is assumed that you are
256 * in The Loop and the post parent will be grabbed for from the current post.
258 * The 'post_parent' argument is the ID to get the children. The 'numberposts'
259 * is the amount of posts to retrieve that has a default of '-1', which is
260 * used to get all of the posts. Giving a number higher than 0 will only
261 * retrieve that amount of posts.
263 * The 'post_type' and 'post_status' arguments can be used to choose what
264 * criteria of posts to retrieve. The 'post_type' can be anything, but WordPress
265 * post types are 'post', 'pages', and 'attachments'. The 'post_status'
266 * argument will accept any post status within the write administration panels.
268 * @see get_posts() Has additional arguments that can be replaced.
269 * @internal Claims made in the long description might be inaccurate.
273 * @param mixed $args Optional. User defined arguments for replacing the defaults.
274 * @param string $output Optional. Constant for return type, either OBJECT (default), ARRAY_A, ARRAY_N.
275 * @return array|bool False on failure and the type will be determined by $output parameter.
277 function get_children($args = '', $output = OBJECT) {
279 if ( empty( $args ) ) {
280 if ( isset( $GLOBALS['post'] ) ) {
281 $args = array('post_parent' => (int) $GLOBALS['post']->post_parent );
285 } elseif ( is_object( $args ) ) {
286 $args = array('post_parent' => (int) $args->post_parent );
287 } elseif ( is_numeric( $args ) ) {
288 $args = array('post_parent' => (int) $args);
292 'numberposts' => -1, 'post_type' => 'any',
293 'post_status' => 'any', 'post_parent' => 0,
296 $r = wp_parse_args( $args, $defaults );
298 $children = get_posts( $r );
303 update_post_cache($children);
305 foreach ( $children as $key => $child )
306 $kids[$child->ID] = $children[$key];
308 if ( $output == OBJECT ) {
310 } elseif ( $output == ARRAY_A ) {
311 foreach ( (array) $kids as $kid )
312 $weeuns[$kid->ID] = get_object_vars($kids[$kid->ID]);
314 } elseif ( $output == ARRAY_N ) {
315 foreach ( (array) $kids as $kid )
316 $babes[$kid->ID] = array_values(get_object_vars($kids[$kid->ID]));
324 * Get extended entry info (<!--more-->).
326 * There should not be any space after the second dash and before the word
327 * 'more'. There can be text or space(s) after the word 'more', but won't be
330 * The returned array has 'main' and 'extended' keys. Main has the text before
331 * the <code><!--more--></code>. The 'extended' key has the content after the
332 * <code><!--more--></code> comment.
336 * @param string $post Post content.
337 * @return array Post before ('main') and after ('extended').
339 function get_extended($post) {
340 //Match the new style more links
341 if ( preg_match('/<!--more(.*?)?-->/', $post, $matches) ) {
342 list($main, $extended) = explode($matches[0], $post, 2);
348 // Strip leading and trailing whitespace
349 $main = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $main);
350 $extended = preg_replace('/^[\s]*(.*)[\s]*$/', '\\1', $extended);
352 return array('main' => $main, 'extended' => $extended);
356 * Retrieves post data given a post ID or post object.
358 * See {@link sanitize_post()} for optional $filter values. Also, the parameter
359 * $post, must be given as a variable, since it is passed by reference.
363 * @link http://codex.wordpress.org/Function_Reference/get_post
365 * @param int|object $post Post ID or post object.
366 * @param string $output Optional, default is Object. Either OBJECT, ARRAY_A, or ARRAY_N.
367 * @param string $filter Optional, default is raw.
368 * @return mixed Post data
370 function &get_post(&$post, $output = OBJECT, $filter = 'raw') {
374 if ( empty($post) ) {
375 if ( isset($GLOBALS['post']) )
376 $_post = & $GLOBALS['post'];
379 } elseif ( is_object($post) && empty($post->filter) ) {
380 _get_post_ancestors($post);
381 $_post = sanitize_post($post, 'raw');
382 wp_cache_add($post->ID, $_post, 'posts');
384 if ( is_object($post) )
385 $post_id = $post->ID;
389 $post_id = (int) $post_id;
390 if ( ! $_post = wp_cache_get($post_id, 'posts') ) {
391 $_post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post_id));
394 _get_post_ancestors($_post);
395 $_post = sanitize_post($_post, 'raw');
396 wp_cache_add($_post->ID, $_post, 'posts');
400 if ($filter != 'raw')
401 $_post = sanitize_post($_post, $filter);
403 if ( $output == OBJECT ) {
405 } elseif ( $output == ARRAY_A ) {
406 $__post = get_object_vars($_post);
408 } elseif ( $output == ARRAY_N ) {
409 $__post = array_values(get_object_vars($_post));
417 * Retrieve ancestors of a post.
421 * @param int|object $post Post ID or post object
422 * @return array Ancestor IDs or empty array if none are found.
424 function get_post_ancestors($post) {
425 $post = get_post($post);
427 if ( !empty($post->ancestors) )
428 return $post->ancestors;
434 * Retrieve data from a post field based on Post ID.
436 * Examples of the post field will be, 'post_type', 'post_status', 'content',
437 * etc and based off of the post object property or key names.
439 * The context values are based off of the taxonomy filter functions and
440 * supported values are found within those functions.
443 * @uses sanitize_post_field() See for possible $context values.
445 * @param string $field Post field name
446 * @param id $post Post ID
447 * @param string $context Optional. How to filter the field. Default is display.
448 * @return WP_Error|string Value in post field or WP_Error on failure
450 function get_post_field( $field, $post, $context = 'display' ) {
452 $post = get_post( $post );
454 if ( is_wp_error($post) )
457 if ( !is_object($post) )
460 if ( !isset($post->$field) )
463 return sanitize_post_field($field, $post->$field, $post->ID, $context);
467 * Retrieve the mime type of an attachment based on the ID.
469 * This function can be used with any post type, but it makes more sense with
474 * @param int $ID Optional. Post ID.
475 * @return bool|string False on failure or returns the mime type
477 function get_post_mime_type($ID = '') {
478 $post = & get_post($ID);
480 if ( is_object($post) )
481 return $post->post_mime_type;
487 * Retrieve the format slug for a post
491 * @param int|object $post A post
493 * @return mixed The format if successful. False if no format is set. WP_Error if errors.
495 function get_post_format( $post = null ) {
496 $post = get_post($post);
498 if ( ! post_type_supports( $post->post_type, 'post-formats' ) )
501 $_format = get_the_terms( $post->ID, 'post_format' );
503 if ( empty( $_format ) )
506 $format = array_shift( $_format );
508 return ( str_replace('post-format-', '', $format->slug ) );
512 * Check if a post has a particular format
517 * @param string $format The format to check for
518 * @param object|id $post The post to check. If not supplied, defaults to the current post if used in the loop.
519 * @return bool True if the post has the format, false otherwise.
521 function has_post_format( $format, $post = null ) {
522 return has_term('post-format-' . sanitize_key($format), 'post_format', $post);
526 * Assign a format to a post
530 * @param int|object $post The post for which to assign a format
531 * @param string $format A format to assign. Use an empty string or array to remove all formats from the post.
532 * @return mixed WP_Error on error. Array of affected term IDs on success.
534 function set_post_format( $post, $format ) {
535 $post = get_post($post);
538 return new WP_Error('invalid_post', __('Invalid post'));
540 if ( !empty($format) ) {
541 $format = sanitize_key($format);
542 if ( 'standard' == $format || !in_array( $format, array_keys( get_post_format_slugs() ) ) )
545 $format = 'post-format-' . $format;
548 return wp_set_post_terms($post->ID, $format, 'post_format');
552 * Retrieve the post status based on the Post ID.
554 * If the post ID is of an attachment, then the parent post status will be given
559 * @param int $ID Post ID
560 * @return string|bool Post status or false on failure.
562 function get_post_status($ID = '') {
563 $post = get_post($ID);
565 if ( !is_object($post) )
568 if ( 'attachment' == $post->post_type ) {
569 if ( 'private' == $post->post_status )
572 // Unattached attachments are assumed to be published
573 if ( ( 'inherit' == $post->post_status ) && ( 0 == $post->post_parent) )
576 // Inherit status from the parent
577 if ( $post->post_parent && ( $post->ID != $post->post_parent ) )
578 return get_post_status($post->post_parent);
581 return $post->post_status;
585 * Retrieve all of the WordPress supported post statuses.
587 * Posts have a limited set of valid status values, this provides the
588 * post_status values and descriptions.
592 * @return array List of post statuses.
594 function get_post_statuses( ) {
596 'draft' => __('Draft'),
597 'pending' => __('Pending Review'),
598 'private' => __('Private'),
599 'publish' => __('Published')
606 * Retrieve all of the WordPress support page statuses.
608 * Pages have a limited set of valid status values, this provides the
609 * post_status values and descriptions.
613 * @return array List of page statuses.
615 function get_page_statuses( ) {
617 'draft' => __('Draft'),
618 'private' => __('Private'),
619 'publish' => __('Published')
626 * Register a post type. Do not use before init.
628 * A simple function for creating or modifying a post status based on the
629 * parameters given. The function will accept an array (second optional
630 * parameter), along with a string for the post status name.
633 * Optional $args contents:
635 * label - A descriptive name for the post status marked for translation. Defaults to $post_status.
636 * public - Whether posts of this status should be shown in the front end of the site. Defaults to true.
637 * exclude_from_search - Whether to exclude posts with this post status from search results. Defaults to false.
638 * show_in_admin_all_list - Whether to include posts in the edit listing for their post type
639 * show_in_admin_status_list - Show in the list of statuses with post counts at the top of the edit
640 * listings, e.g. All (12) | Published (9) | My Custom Status (2) ...
642 * Arguments prefixed with an _underscore shouldn't be used by plugins and themes.
647 * @uses $wp_post_statuses Inserts new post status object into the list
649 * @param string $post_status Name of the post status.
650 * @param array|string $args See above description.
652 function register_post_status($post_status, $args = array()) {
653 global $wp_post_statuses;
655 if (!is_array($wp_post_statuses))
656 $wp_post_statuses = array();
658 // Args prefixed with an underscore are reserved for internal use.
659 $defaults = array('label' => false, 'label_count' => false, 'exclude_from_search' => null, '_builtin' => false, '_edit_link' => 'post.php?post=%d', 'capability_type' => 'post', 'hierarchical' => false, 'public' => null, 'internal' => null, 'protected' => null, 'private' => null, 'show_in_admin_all' => null, 'publicly_queryable' => null, 'show_in_admin_status_list' => null, 'show_in_admin_all_list' => null, 'single_view_cap' => null);
660 $args = wp_parse_args($args, $defaults);
661 $args = (object) $args;
663 $post_status = sanitize_key($post_status);
664 $args->name = $post_status;
666 if ( null === $args->public && null === $args->internal && null === $args->protected && null === $args->private )
667 $args->internal = true;
669 if ( null === $args->public )
670 $args->public = false;
672 if ( null === $args->private )
673 $args->private = false;
675 if ( null === $args->protected )
676 $args->protected = false;
678 if ( null === $args->internal )
679 $args->internal = false;
681 if ( null === $args->publicly_queryable )
682 $args->publicly_queryable = $args->public;
684 if ( null === $args->exclude_from_search )
685 $args->exclude_from_search = $args->internal;
687 if ( null === $args->show_in_admin_all_list )
688 $args->show_in_admin_all_list = !$args->internal;
690 if ( null === $args->show_in_admin_status_list )
691 $args->show_in_admin_status_list = !$args->internal;
693 if ( null === $args->single_view_cap )
694 $args->single_view_cap = $args->public ? '' : 'edit';
696 if ( false === $args->label )
697 $args->label = $post_status;
699 if ( false === $args->label_count )
700 $args->label_count = array( $args->label, $args->label );
702 $wp_post_statuses[$post_status] = $args;
708 * Retrieve a post status object by name
713 * @uses $wp_post_statuses
714 * @see register_post_status
715 * @see get_post_statuses
717 * @param string $post_status The name of a registered post status
718 * @return object A post status object
720 function get_post_status_object( $post_status ) {
721 global $wp_post_statuses;
723 if ( empty($wp_post_statuses[$post_status]) )
726 return $wp_post_statuses[$post_status];
730 * Get a list of all registered post status objects.
735 * @uses $wp_post_statuses
736 * @see register_post_status
737 * @see get_post_status_object
739 * @param array|string $args An array of key => value arguments to match against the post status objects.
740 * @param string $output The type of output to return, either post status 'names' or 'objects'. 'names' is the default.
741 * @param string $operator The logical operation to perform. 'or' means only one element
742 * from the array needs to match; 'and' means all elements must match. The default is 'and'.
743 * @return array A list of post type names or objects
745 function get_post_stati( $args = array(), $output = 'names', $operator = 'and' ) {
746 global $wp_post_statuses;
748 $field = ('names' == $output) ? 'name' : false;
750 return wp_filter_object_list($wp_post_statuses, $args, $operator, $field);
754 * Whether the post type is hierarchical.
756 * A false return value might also mean that the post type does not exist.
759 * @see get_post_type_object
761 * @param string $post_type Post type name
762 * @return bool Whether post type is hierarchical.
764 function is_post_type_hierarchical( $post_type ) {
765 if ( ! post_type_exists( $post_type ) )
768 $post_type = get_post_type_object( $post_type );
769 return $post_type->hierarchical;
773 * Checks if a post type is registered.
776 * @uses get_post_type_object()
778 * @param string $post_type Post type name
779 * @return bool Whether post type is registered.
781 function post_type_exists( $post_type ) {
782 return (bool) get_post_type_object( $post_type );
786 * Retrieve the post type of the current post or of a given post.
790 * @uses $post The Loop current post global
792 * @param mixed $the_post Optional. Post object or post ID.
793 * @return bool|string post type or false on failure.
795 function get_post_type( $the_post = false ) {
798 if ( false === $the_post )
800 elseif ( is_numeric($the_post) )
801 $the_post = get_post($the_post);
803 if ( is_object($the_post) )
804 return $the_post->post_type;
810 * Retrieve a post type object by name
815 * @uses $wp_post_types
816 * @see register_post_type
817 * @see get_post_types
819 * @param string $post_type The name of a registered post type
820 * @return object A post type object
822 function get_post_type_object( $post_type ) {
823 global $wp_post_types;
825 if ( empty($wp_post_types[$post_type]) )
828 return $wp_post_types[$post_type];
832 * Get a list of all registered post type objects.
837 * @uses $wp_post_types
838 * @see register_post_type
840 * @param array|string $args An array of key => value arguments to match against the post type objects.
841 * @param string $output The type of output to return, either post type 'names' or 'objects'. 'names' is the default.
842 * @param string $operator The logical operation to perform. 'or' means only one element
843 * from the array needs to match; 'and' means all elements must match. The default is 'and'.
844 * @return array A list of post type names or objects
846 function get_post_types( $args = array(), $output = 'names', $operator = 'and' ) {
847 global $wp_post_types;
849 $field = ('names' == $output) ? 'name' : false;
851 return wp_filter_object_list($wp_post_types, $args, $operator, $field);
855 * Register a post type. Do not use before init.
857 * A function for creating or modifying a post type based on the
858 * parameters given. The function will accept an array (second optional
859 * parameter), along with a string for the post type name.
861 * Optional $args contents:
863 * - label - Name of the post type shown in the menu. Usually plural. If not set, labels['name'] will be used.
864 * - description - A short descriptive summary of what the post type is. Defaults to blank.
865 * - public - Whether posts of this type should be shown in the admin UI. Defaults to false.
866 * - exclude_from_search - Whether to exclude posts with this post type from search results.
867 * Defaults to true if the type is not public, false if the type is public.
868 * - publicly_queryable - Whether post_type queries can be performed from the front page.
869 * Defaults to whatever public is set as.
870 * - show_ui - Whether to generate a default UI for managing this post type. Defaults to true
871 * if the type is public, false if the type is not public.
872 * - show_in_menu - Where to show the post type in the admin menu. True for a top level menu,
873 * false for no menu, or can be a top level page like 'tools.php' or 'edit.php?post_type=page'.
874 * show_ui must be true.
875 * - menu_position - The position in the menu order the post type should appear. Defaults to the bottom.
876 * - menu_icon - The url to the icon to be used for this menu. Defaults to use the posts icon.
877 * - capability_type - The string to use to build the read, edit, and delete capabilities. Defaults to 'post'.
878 * May be passed as an array to allow for alternative plurals when using this argument as a base to construct the
879 * capabilities, e.g. array('story', 'stories').
880 * - capabilities - Array of capabilities for this post type. By default the capability_type is used
881 * as a base to construct capabilities. You can see accepted values in {@link get_post_type_capabilities()}.
882 * - map_meta_cap - Whether to use the internal default meta capability handling. Defaults to false.
883 * - hierarchical - Whether the post type is hierarchical. Defaults to false.
884 * - supports - An alias for calling add_post_type_support() directly. See {@link add_post_type_support()}
885 * for documentation. Defaults to none.
886 * - register_meta_box_cb - Provide a callback function that will be called when setting up the
887 * meta boxes for the edit form. Do remove_meta_box() and add_meta_box() calls in the callback.
888 * - taxonomies - An array of taxonomy identifiers that will be registered for the post type.
889 * Default is no taxonomies. Taxonomies can be registered later with register_taxonomy() or
890 * register_taxonomy_for_object_type().
891 * - labels - An array of labels for this post type. By default post labels are used for non-hierarchical
892 * types and page labels for hierarchical ones. You can see accepted values in {@link get_post_type_labels()}.
893 * - permalink_epmask - The default rewrite endpoint bitmasks.
894 * - has_archive - True to enable post type archives. Will generate the proper rewrite rules if rewrite is enabled.
895 * - rewrite - false to prevent rewrite. Defaults to true. Use array('slug'=>$slug) to customize permastruct;
896 * default will use $post_type as slug. Other options include 'with_front', 'feeds', and 'pages'.
897 * - query_var - false to prevent queries, or string to value of the query var to use for this post type
898 * - can_export - true allows this post type to be exported.
899 * - show_in_nav_menus - true makes this post type available for selection in navigation menus.
900 * - _builtin - true if this post type is a native or "built-in" post_type. THIS IS FOR INTERNAL USE ONLY!
901 * - _edit_link - URL segement to use for edit link of this post type. THIS IS FOR INTERNAL USE ONLY!
904 * @uses $wp_post_types Inserts new post type object into the list
906 * @param string $post_type Name of the post type.
907 * @param array|string $args See above description.
908 * @return object|WP_Error the registered post type object, or an error object
910 function register_post_type($post_type, $args = array()) {
911 global $wp_post_types, $wp_rewrite, $wp;
913 if ( !is_array($wp_post_types) )
914 $wp_post_types = array();
916 // Args prefixed with an underscore are reserved for internal use.
918 'labels' => array(), 'description' => '', 'publicly_queryable' => null, 'exclude_from_search' => null,
919 'capability_type' => 'post', 'capabilities' => array(), 'map_meta_cap' => null,
920 '_builtin' => false, '_edit_link' => 'post.php?post=%d', 'hierarchical' => false,
921 'public' => false, 'rewrite' => true, 'has_archive' => false, 'query_var' => true,
922 'supports' => array(), 'register_meta_box_cb' => null,
923 'taxonomies' => array(), 'show_ui' => null, 'menu_position' => null, 'menu_icon' => null,
924 'permalink_epmask' => EP_PERMALINK, 'can_export' => true,
925 'show_in_nav_menus' => null, 'show_in_menu' => null, 'show_in_admin_bar' => null,
927 $args = wp_parse_args($args, $defaults);
928 $args = (object) $args;
930 $post_type = sanitize_key($post_type);
931 $args->name = $post_type;
933 if ( strlen( $post_type ) > 20 )
934 return new WP_Error( 'post_type_too_long', __( 'Post types cannot exceed 20 characters in length' ) );
936 // If not set, default to the setting for public.
937 if ( null === $args->publicly_queryable )
938 $args->publicly_queryable = $args->public;
940 // If not set, default to the setting for public.
941 if ( null === $args->show_ui )
942 $args->show_ui = $args->public;
944 // If not set, default to the setting for show_ui.
945 if ( null === $args->show_in_menu || ! $args->show_ui )
946 $args->show_in_menu = $args->show_ui;
948 // If not set, default to the whether the full UI is shown.
949 if ( null === $args->show_in_admin_bar )
950 $args->show_in_admin_bar = true === $args->show_in_menu;
952 // Whether to show this type in nav-menus.php. Defaults to the setting for public.
953 if ( null === $args->show_in_nav_menus )
954 $args->show_in_nav_menus = $args->public;
956 // If not set, default to true if not public, false if public.
957 if ( null === $args->exclude_from_search )
958 $args->exclude_from_search = !$args->public;
960 // Back compat with quirky handling in version 3.0. #14122
961 if ( empty( $args->capabilities ) && null === $args->map_meta_cap && in_array( $args->capability_type, array( 'post', 'page' ) ) )
962 $args->map_meta_cap = true;
964 if ( null === $args->map_meta_cap )
965 $args->map_meta_cap = false;
967 $args->cap = get_post_type_capabilities( $args );
968 unset($args->capabilities);
970 if ( is_array( $args->capability_type ) )
971 $args->capability_type = $args->capability_type[0];
973 if ( ! empty($args->supports) ) {
974 add_post_type_support($post_type, $args->supports);
975 unset($args->supports);
977 // Add default features
978 add_post_type_support($post_type, array('title', 'editor'));
981 if ( false !== $args->query_var && !empty($wp) ) {
982 if ( true === $args->query_var )
983 $args->query_var = $post_type;
984 $args->query_var = sanitize_title_with_dashes($args->query_var);
985 $wp->add_query_var($args->query_var);
988 if ( false !== $args->rewrite && '' != get_option('permalink_structure') ) {
989 if ( ! is_array( $args->rewrite ) )
990 $args->rewrite = array();
991 if ( empty( $args->rewrite['slug'] ) )
992 $args->rewrite['slug'] = $post_type;
993 if ( ! isset( $args->rewrite['with_front'] ) )
994 $args->rewrite['with_front'] = true;
995 if ( ! isset( $args->rewrite['pages'] ) )
996 $args->rewrite['pages'] = true;
997 if ( ! isset( $args->rewrite['feeds'] ) || ! $args->has_archive )
998 $args->rewrite['feeds'] = (bool) $args->has_archive;
1000 if ( $args->hierarchical )
1001 $wp_rewrite->add_rewrite_tag("%$post_type%", '(.+?)', $args->query_var ? "{$args->query_var}=" : "post_type=$post_type&name=");
1003 $wp_rewrite->add_rewrite_tag("%$post_type%", '([^/]+)', $args->query_var ? "{$args->query_var}=" : "post_type=$post_type&name=");
1005 if ( $args->has_archive ) {
1006 $archive_slug = $args->has_archive === true ? $args->rewrite['slug'] : $args->has_archive;
1007 if ( $args->rewrite['with_front'] )
1008 $archive_slug = substr( $wp_rewrite->front, 1 ) . $archive_slug;
1010 $archive_slug = $wp_rewrite->root . $archive_slug;
1012 $wp_rewrite->add_rule( "{$archive_slug}/?$", "index.php?post_type=$post_type", 'top' );
1013 if ( $args->rewrite['feeds'] && $wp_rewrite->feeds ) {
1014 $feeds = '(' . trim( implode( '|', $wp_rewrite->feeds ) ) . ')';
1015 $wp_rewrite->add_rule( "{$archive_slug}/feed/$feeds/?$", "index.php?post_type=$post_type" . '&feed=$matches[1]', 'top' );
1016 $wp_rewrite->add_rule( "{$archive_slug}/$feeds/?$", "index.php?post_type=$post_type" . '&feed=$matches[1]', 'top' );
1018 if ( $args->rewrite['pages'] )
1019 $wp_rewrite->add_rule( "{$archive_slug}/{$wp_rewrite->pagination_base}/([0-9]{1,})/?$", "index.php?post_type=$post_type" . '&paged=$matches[1]', 'top' );
1022 $wp_rewrite->add_permastruct($post_type, "{$args->rewrite['slug']}/%$post_type%", $args->rewrite['with_front'], $args->permalink_epmask);
1025 if ( $args->register_meta_box_cb )
1026 add_action('add_meta_boxes_' . $post_type, $args->register_meta_box_cb, 10, 1);
1028 $args->labels = get_post_type_labels( $args );
1029 $args->label = $args->labels->name;
1031 $wp_post_types[$post_type] = $args;
1033 add_action( 'future_' . $post_type, '_future_post_hook', 5, 2 );
1035 foreach ( $args->taxonomies as $taxonomy ) {
1036 register_taxonomy_for_object_type( $taxonomy, $post_type );
1043 * Builds an object with all post type capabilities out of a post type object
1045 * Post type capabilities use the 'capability_type' argument as a base, if the
1046 * capability is not set in the 'capabilities' argument array or if the
1047 * 'capabilities' argument is not supplied.
1049 * The capability_type argument can optionally be registered as an array, with
1050 * the first value being singular and the second plural, e.g. array('story, 'stories')
1051 * Otherwise, an 's' will be added to the value for the plural form. After
1052 * registration, capability_type will always be a string of the singular value.
1054 * By default, seven keys are accepted as part of the capabilities array:
1056 * - edit_post, read_post, and delete_post are meta capabilities, which are then
1057 * generally mapped to corresponding primitive capabilities depending on the
1058 * context, which would be the post being edited/read/deleted and the user or
1059 * role being checked. Thus these capabilities would generally not be granted
1060 * directly to users or roles.
1062 * - edit_posts - Controls whether objects of this post type can be edited.
1063 * - edit_others_posts - Controls whether objects of this type owned by other users
1064 * can be edited. If the post type does not support an author, then this will
1065 * behave like edit_posts.
1066 * - publish_posts - Controls publishing objects of this post type.
1067 * - read_private_posts - Controls whether private objects can be read.
1069 * These four primitive capabilities are checked in core in various locations.
1070 * There are also seven other primitive capabilities which are not referenced
1071 * directly in core, except in map_meta_cap(), which takes the three aforementioned
1072 * meta capabilities and translates them into one or more primitive capabilities
1073 * that must then be checked against the user or role, depending on the context.
1075 * - read - Controls whether objects of this post type can be read.
1076 * - delete_posts - Controls whether objects of this post type can be deleted.
1077 * - delete_private_posts - Controls whether private objects can be deleted.
1078 * - delete_published_posts - Controls whether published objects can be deleted.
1079 * - delete_others_posts - Controls whether objects owned by other users can be
1080 * can be deleted. If the post type does not support an author, then this will
1081 * behave like delete_posts.
1082 * - edit_private_posts - Controls whether private objects can be edited.
1083 * - edit_published_posts - Controls whether published objects can be edited.
1085 * These additional capabilities are only used in map_meta_cap(). Thus, they are
1086 * only assigned by default if the post type is registered with the 'map_meta_cap'
1087 * argument set to true (default is false).
1089 * @see map_meta_cap()
1092 * @param object $args Post type registration arguments
1093 * @return object object with all the capabilities as member variables
1095 function get_post_type_capabilities( $args ) {
1096 if ( ! is_array( $args->capability_type ) )
1097 $args->capability_type = array( $args->capability_type, $args->capability_type . 's' );
1099 // Singular base for meta capabilities, plural base for primitive capabilities.
1100 list( $singular_base, $plural_base ) = $args->capability_type;
1102 $default_capabilities = array(
1103 // Meta capabilities
1104 'edit_post' => 'edit_' . $singular_base,
1105 'read_post' => 'read_' . $singular_base,
1106 'delete_post' => 'delete_' . $singular_base,
1107 // Primitive capabilities used outside of map_meta_cap():
1108 'edit_posts' => 'edit_' . $plural_base,
1109 'edit_others_posts' => 'edit_others_' . $plural_base,
1110 'publish_posts' => 'publish_' . $plural_base,
1111 'read_private_posts' => 'read_private_' . $plural_base,
1114 // Primitive capabilities used within map_meta_cap():
1115 if ( $args->map_meta_cap ) {
1116 $default_capabilities_for_mapping = array(
1118 'delete_posts' => 'delete_' . $plural_base,
1119 'delete_private_posts' => 'delete_private_' . $plural_base,
1120 'delete_published_posts' => 'delete_published_' . $plural_base,
1121 'delete_others_posts' => 'delete_others_' . $plural_base,
1122 'edit_private_posts' => 'edit_private_' . $plural_base,
1123 'edit_published_posts' => 'edit_published_' . $plural_base,
1125 $default_capabilities = array_merge( $default_capabilities, $default_capabilities_for_mapping );
1128 $capabilities = array_merge( $default_capabilities, $args->capabilities );
1130 // Remember meta capabilities for future reference.
1131 if ( $args->map_meta_cap )
1132 _post_type_meta_capabilities( $capabilities );
1134 return (object) $capabilities;
1138 * Stores or returns a list of post type meta caps for map_meta_cap().
1143 function _post_type_meta_capabilities( $capabilities = null ) {
1144 static $meta_caps = array();
1145 if ( null === $capabilities )
1147 foreach ( $capabilities as $core => $custom ) {
1148 if ( in_array( $core, array( 'read_post', 'delete_post', 'edit_post' ) ) )
1149 $meta_caps[ $custom ] = $core;
1154 * Builds an object with all post type labels out of a post type object
1156 * Accepted keys of the label array in the post type object:
1157 * - name - general name for the post type, usually plural. The same and overriden by $post_type_object->label. Default is Posts/Pages
1158 * - singular_name - name for one object of this post type. Default is Post/Page
1159 * - add_new - Default is Add New for both hierarchical and non-hierarchical types. When internationalizing this string, please use a {@link http://codex.wordpress.org/I18n_for_WordPress_Developers#Disambiguation_by_context gettext context} matching your post type. Example: <code>_x('Add New', 'product');</code>
1160 * - add_new_item - Default is Add New Post/Add New Page
1161 * - edit_item - Default is Edit Post/Edit Page
1162 * - new_item - Default is New Post/New Page
1163 * - view_item - Default is View Post/View Page
1164 * - search_items - Default is Search Posts/Search Pages
1165 * - not_found - Default is No posts found/No pages found
1166 * - not_found_in_trash - Default is No posts found in Trash/No pages found in Trash
1167 * - parent_item_colon - This string isn't used on non-hierarchical types. In hierarchical ones the default is Parent Page:
1169 * Above, the first default value is for non-hierarchical post types (like posts) and the second one is for hierarchical post types (like pages).
1172 * @param object $post_type_object
1173 * @return object object with all the labels as member variables
1175 function get_post_type_labels( $post_type_object ) {
1176 $nohier_vs_hier_defaults = array(
1177 'name' => array( _x('Posts', 'post type general name'), _x('Pages', 'post type general name') ),
1178 'singular_name' => array( _x('Post', 'post type singular name'), _x('Page', 'post type singular name') ),
1179 'add_new' => array( _x('Add New', 'post'), _x('Add New', 'page') ),
1180 'add_new_item' => array( __('Add New Post'), __('Add New Page') ),
1181 'edit_item' => array( __('Edit Post'), __('Edit Page') ),
1182 'new_item' => array( __('New Post'), __('New Page') ),
1183 'view_item' => array( __('View Post'), __('View Page') ),
1184 'search_items' => array( __('Search Posts'), __('Search Pages') ),
1185 'not_found' => array( __('No posts found.'), __('No pages found.') ),
1186 'not_found_in_trash' => array( __('No posts found in Trash.'), __('No pages found in Trash.') ),
1187 'parent_item_colon' => array( null, __('Parent Page:') ),
1188 'all_items' => array( __( 'All Posts' ), __( 'All Pages' ) )
1190 $nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];
1191 return _get_custom_object_labels( $post_type_object, $nohier_vs_hier_defaults );
1195 * Builds an object with custom-something object (post type, taxonomy) labels out of a custom-something object
1200 function _get_custom_object_labels( $object, $nohier_vs_hier_defaults ) {
1202 if ( isset( $object->label ) && empty( $object->labels['name'] ) )
1203 $object->labels['name'] = $object->label;
1205 if ( !isset( $object->labels['singular_name'] ) && isset( $object->labels['name'] ) )
1206 $object->labels['singular_name'] = $object->labels['name'];
1208 if ( ! isset( $object->labels['name_admin_bar'] ) )
1209 $object->labels['name_admin_bar'] = isset( $object->labels['singular_name'] ) ? $object->labels['singular_name'] : $object->name;
1211 if ( !isset( $object->labels['menu_name'] ) && isset( $object->labels['name'] ) )
1212 $object->labels['menu_name'] = $object->labels['name'];
1214 if ( !isset( $object->labels['all_items'] ) && isset( $object->labels['menu_name'] ) )
1215 $object->labels['all_items'] = $object->labels['menu_name'];
1217 foreach ( $nohier_vs_hier_defaults as $key => $value )
1218 $defaults[$key] = $object->hierarchical ? $value[1] : $value[0];
1220 $labels = array_merge( $defaults, $object->labels );
1221 return (object)$labels;
1225 * Adds submenus for post types.
1230 function _add_post_type_submenus() {
1231 foreach ( get_post_types( array( 'show_ui' => true ) ) as $ptype ) {
1232 $ptype_obj = get_post_type_object( $ptype );
1234 if ( ! $ptype_obj->show_in_menu || $ptype_obj->show_in_menu === true )
1236 add_submenu_page( $ptype_obj->show_in_menu, $ptype_obj->labels->name, $ptype_obj->labels->all_items, $ptype_obj->cap->edit_posts, "edit.php?post_type=$ptype" );
1239 add_action( 'admin_menu', '_add_post_type_submenus' );
1242 * Register support of certain features for a post type.
1244 * All features are directly associated with a functional area of the edit screen, such as the
1245 * editor or a meta box: 'title', 'editor', 'comments', 'revisions', 'trackbacks', 'author',
1246 * 'excerpt', 'page-attributes', 'thumbnail', and 'custom-fields'.
1248 * Additionally, the 'revisions' feature dictates whether the post type will store revisions,
1249 * and the 'comments' feature dicates whether the comments count will show on the edit screen.
1252 * @param string $post_type The post type for which to add the feature
1253 * @param string|array $feature the feature being added, can be an array of feature strings or a single string
1255 function add_post_type_support( $post_type, $feature ) {
1256 global $_wp_post_type_features;
1258 $features = (array) $feature;
1259 foreach ($features as $feature) {
1260 if ( func_num_args() == 2 )
1261 $_wp_post_type_features[$post_type][$feature] = true;
1263 $_wp_post_type_features[$post_type][$feature] = array_slice( func_get_args(), 2 );
1268 * Remove support for a feature from a post type.
1271 * @param string $post_type The post type for which to remove the feature
1272 * @param string $feature The feature being removed
1274 function remove_post_type_support( $post_type, $feature ) {
1275 global $_wp_post_type_features;
1277 if ( !isset($_wp_post_type_features[$post_type]) )
1280 if ( isset($_wp_post_type_features[$post_type][$feature]) )
1281 unset($_wp_post_type_features[$post_type][$feature]);
1285 * Checks a post type's support for a given feature
1288 * @param string $post_type The post type being checked
1289 * @param string $feature the feature being checked
1293 function post_type_supports( $post_type, $feature ) {
1294 global $_wp_post_type_features;
1296 if ( !isset( $_wp_post_type_features[$post_type][$feature] ) )
1299 // If no args passed then no extra checks need be performed
1300 if ( func_num_args() <= 2 )
1303 // @todo Allow pluggable arg checking
1304 //$args = array_slice( func_get_args(), 2 );
1310 * Updates the post type for the post ID.
1312 * The page or post cache will be cleaned for the post ID.
1318 * @param int $post_id Post ID to change post type. Not actually optional.
1319 * @param string $post_type Optional, default is post. Supported values are 'post' or 'page' to
1321 * @return int Amount of rows changed. Should be 1 for success and 0 for failure.
1323 function set_post_type( $post_id = 0, $post_type = 'post' ) {
1326 $post_type = sanitize_post_field('post_type', $post_type, $post_id, 'db');
1327 $return = $wpdb->update($wpdb->posts, array('post_type' => $post_type), array('ID' => $post_id) );
1329 if ( 'page' == $post_type )
1330 clean_page_cache($post_id);
1332 clean_post_cache($post_id);
1338 * Retrieve list of latest posts or posts matching criteria.
1340 * The defaults are as follows:
1341 * 'numberposts' - Default is 5. Total number of posts to retrieve.
1342 * 'offset' - Default is 0. See {@link WP_Query::query()} for more.
1343 * 'category' - What category to pull the posts from.
1344 * 'orderby' - Default is 'post_date'. How to order the posts.
1345 * 'order' - Default is 'DESC'. The order to retrieve the posts.
1346 * 'include' - See {@link WP_Query::query()} for more.
1347 * 'exclude' - See {@link WP_Query::query()} for more.
1348 * 'meta_key' - See {@link WP_Query::query()} for more.
1349 * 'meta_value' - See {@link WP_Query::query()} for more.
1350 * 'post_type' - Default is 'post'. Can be 'page', or 'attachment' to name a few.
1351 * 'post_parent' - The parent of the post or post type.
1352 * 'post_status' - Default is 'publish'. Post status to retrieve.
1356 * @uses WP_Query::query() See for more default arguments and information.
1357 * @link http://codex.wordpress.org/Template_Tags/get_posts
1359 * @param array $args Optional. Overrides defaults.
1360 * @return array List of posts.
1362 function get_posts($args = null) {
1364 'numberposts' => 5, 'offset' => 0,
1365 'category' => 0, 'orderby' => 'post_date',
1366 'order' => 'DESC', 'include' => array(),
1367 'exclude' => array(), 'meta_key' => '',
1368 'meta_value' =>'', 'post_type' => 'post',
1369 'suppress_filters' => true
1372 $r = wp_parse_args( $args, $defaults );
1373 if ( empty( $r['post_status'] ) )
1374 $r['post_status'] = ( 'attachment' == $r['post_type'] ) ? 'inherit' : 'publish';
1375 if ( ! empty($r['numberposts']) && empty($r['posts_per_page']) )
1376 $r['posts_per_page'] = $r['numberposts'];
1377 if ( ! empty($r['category']) )
1378 $r['cat'] = $r['category'];
1379 if ( ! empty($r['include']) ) {
1380 $incposts = wp_parse_id_list( $r['include'] );
1381 $r['posts_per_page'] = count($incposts); // only the number of posts included
1382 $r['post__in'] = $incposts;
1383 } elseif ( ! empty($r['exclude']) )
1384 $r['post__not_in'] = wp_parse_id_list( $r['exclude'] );
1386 $r['ignore_sticky_posts'] = true;
1387 $r['no_found_rows'] = true;
1389 $get_posts = new WP_Query;
1390 return $get_posts->query($r);
1395 // Post meta functions
1399 * Add meta data field to a post.
1401 * Post meta data is called "Custom Fields" on the Administration Screen.
1405 * @link http://codex.wordpress.org/Function_Reference/add_post_meta
1407 * @param int $post_id Post ID.
1408 * @param string $meta_key Metadata name.
1409 * @param mixed $meta_value Metadata value.
1410 * @param bool $unique Optional, default is false. Whether the same key should not be added.
1411 * @return bool False for failure. True for success.
1413 function add_post_meta($post_id, $meta_key, $meta_value, $unique = false) {
1414 // make sure meta is added to the post, not a revision
1415 if ( $the_post = wp_is_post_revision($post_id) )
1416 $post_id = $the_post;
1418 return add_metadata('post', $post_id, $meta_key, $meta_value, $unique);
1422 * Remove metadata matching criteria from a post.
1424 * You can match based on the key, or key and value. Removing based on key and
1425 * value, will keep from removing duplicate metadata with the same key. It also
1426 * allows removing all metadata matching key, if needed.
1430 * @link http://codex.wordpress.org/Function_Reference/delete_post_meta
1432 * @param int $post_id post ID
1433 * @param string $meta_key Metadata name.
1434 * @param mixed $meta_value Optional. Metadata value.
1435 * @return bool False for failure. True for success.
1437 function delete_post_meta($post_id, $meta_key, $meta_value = '') {
1438 // make sure meta is added to the post, not a revision
1439 if ( $the_post = wp_is_post_revision($post_id) )
1440 $post_id = $the_post;
1442 return delete_metadata('post', $post_id, $meta_key, $meta_value);
1446 * Retrieve post meta field for a post.
1450 * @link http://codex.wordpress.org/Function_Reference/get_post_meta
1452 * @param int $post_id Post ID.
1453 * @param string $key The meta key to retrieve.
1454 * @param bool $single Whether to return a single value.
1455 * @return mixed Will be an array if $single is false. Will be value of meta data field if $single
1458 function get_post_meta($post_id, $key, $single = false) {
1459 return get_metadata('post', $post_id, $key, $single);
1463 * Update post meta field based on post ID.
1465 * Use the $prev_value parameter to differentiate between meta fields with the
1466 * same key and post ID.
1468 * If the meta field for the post does not exist, it will be added.
1472 * @link http://codex.wordpress.org/Function_Reference/update_post_meta
1474 * @param int $post_id Post ID.
1475 * @param string $meta_key Metadata key.
1476 * @param mixed $meta_value Metadata value.
1477 * @param mixed $prev_value Optional. Previous value to check before removing.
1478 * @return bool False on failure, true if success.
1480 function update_post_meta($post_id, $meta_key, $meta_value, $prev_value = '') {
1481 // make sure meta is added to the post, not a revision
1482 if ( $the_post = wp_is_post_revision($post_id) )
1483 $post_id = $the_post;
1485 return update_metadata('post', $post_id, $meta_key, $meta_value, $prev_value);
1489 * Delete everything from post meta matching meta key.
1494 * @param string $post_meta_key Key to search for when deleting.
1495 * @return bool Whether the post meta key was deleted from the database
1497 function delete_post_meta_by_key($post_meta_key) {
1498 if ( !$post_meta_key )
1502 $post_ids = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key));
1504 $postmetaids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key ) );
1505 $in = implode( ',', array_fill(1, count($postmetaids), '%d'));
1506 do_action( 'delete_postmeta', $postmetaids );
1507 $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id IN($in)", $postmetaids ));
1508 do_action( 'deleted_postmeta', $postmetaids );
1509 foreach ( $post_ids as $post_id )
1510 wp_cache_delete($post_id, 'post_meta');
1517 * Retrieve post meta fields, based on post ID.
1519 * The post meta fields are retrieved from the cache, so the function is
1520 * optimized to be called more than once. It also applies to the functions, that
1521 * use this function.
1524 * @link http://codex.wordpress.org/Function_Reference/get_post_custom
1526 * @uses $id Current Loop Post ID
1528 * @param int $post_id post ID
1531 function get_post_custom( $post_id = 0 ) {
1532 $post_id = absint( $post_id );
1535 $post_id = get_the_ID();
1537 if ( ! wp_cache_get( $post_id, 'post_meta' ) )
1538 update_postmeta_cache( $post_id );
1540 return wp_cache_get( $post_id, 'post_meta' );
1544 * Retrieve meta field names for a post.
1546 * If there are no meta fields, then nothing (null) will be returned.
1549 * @link http://codex.wordpress.org/Function_Reference/get_post_custom_keys
1551 * @param int $post_id post ID
1552 * @return array|null Either array of the keys, or null if keys could not be retrieved.
1554 function get_post_custom_keys( $post_id = 0 ) {
1555 $custom = get_post_custom( $post_id );
1557 if ( !is_array($custom) )
1560 if ( $keys = array_keys($custom) )
1565 * Retrieve values for a custom post field.
1567 * The parameters must not be considered optional. All of the post meta fields
1568 * will be retrieved and only the meta field key values returned.
1571 * @link http://codex.wordpress.org/Function_Reference/get_post_custom_values
1573 * @param string $key Meta field key.
1574 * @param int $post_id Post ID
1575 * @return array Meta field values.
1577 function get_post_custom_values( $key = '', $post_id = 0 ) {
1581 $custom = get_post_custom($post_id);
1583 return isset($custom[$key]) ? $custom[$key] : null;
1587 * Check if post is sticky.
1589 * Sticky posts should remain at the top of The Loop. If the post ID is not
1590 * given, then The Loop ID for the current post will be used.
1594 * @param int $post_id Optional. Post ID.
1595 * @return bool Whether post is sticky.
1597 function is_sticky( $post_id = 0 ) {
1598 $post_id = absint( $post_id );
1601 $post_id = get_the_ID();
1603 $stickies = get_option( 'sticky_posts' );
1605 if ( ! is_array( $stickies ) )
1608 if ( in_array( $post_id, $stickies ) )
1615 * Sanitize every post field.
1617 * If the context is 'raw', then the post object or array will get minimal santization of the int fields.
1620 * @uses sanitize_post_field() Used to sanitize the fields.
1622 * @param object|array $post The Post Object or Array
1623 * @param string $context Optional, default is 'display'. How to sanitize post fields.
1624 * @return object|array The now sanitized Post Object or Array (will be the same type as $post)
1626 function sanitize_post($post, $context = 'display') {
1627 if ( is_object($post) ) {
1628 // Check if post already filtered for this context
1629 if ( isset($post->filter) && $context == $post->filter )
1631 if ( !isset($post->ID) )
1633 foreach ( array_keys(get_object_vars($post)) as $field )
1634 $post->$field = sanitize_post_field($field, $post->$field, $post->ID, $context);
1635 $post->filter = $context;
1637 // Check if post already filtered for this context
1638 if ( isset($post['filter']) && $context == $post['filter'] )
1640 if ( !isset($post['ID']) )
1642 foreach ( array_keys($post) as $field )
1643 $post[$field] = sanitize_post_field($field, $post[$field], $post['ID'], $context);
1644 $post['filter'] = $context;
1650 * Sanitize post field based on context.
1652 * Possible context values are: 'raw', 'edit', 'db', 'display', 'attribute' and 'js'. The
1653 * 'display' context is used by default. 'attribute' and 'js' contexts are treated like 'display'
1654 * when calling filters.
1657 * @uses apply_filters() Calls 'edit_$field' and '{$field_no_prefix}_edit_pre' passing $value and
1658 * $post_id if $context == 'edit' and field name prefix == 'post_'.
1660 * @uses apply_filters() Calls 'edit_post_$field' passing $value and $post_id if $context == 'db'.
1661 * @uses apply_filters() Calls 'pre_$field' passing $value if $context == 'db' and field name prefix == 'post_'.
1662 * @uses apply_filters() Calls '{$field}_pre' passing $value if $context == 'db' and field name prefix != 'post_'.
1664 * @uses apply_filters() Calls '$field' passing $value, $post_id and $context if $context == anything
1665 * other than 'raw', 'edit' and 'db' and field name prefix == 'post_'.
1666 * @uses apply_filters() Calls 'post_$field' passing $value if $context == anything other than 'raw',
1667 * 'edit' and 'db' and field name prefix != 'post_'.
1669 * @param string $field The Post Object field name.
1670 * @param mixed $value The Post Object value.
1671 * @param int $post_id Post ID.
1672 * @param string $context How to sanitize post fields. Looks for 'raw', 'edit', 'db', 'display',
1673 * 'attribute' and 'js'.
1674 * @return mixed Sanitized value.
1676 function sanitize_post_field($field, $value, $post_id, $context) {
1677 $int_fields = array('ID', 'post_parent', 'menu_order');
1678 if ( in_array($field, $int_fields) )
1679 $value = (int) $value;
1681 // Fields which contain arrays of ints.
1682 $array_int_fields = array( 'ancestors' );
1683 if ( in_array($field, $array_int_fields) ) {
1684 $value = array_map( 'absint', $value);
1688 if ( 'raw' == $context )
1692 if ( false !== strpos($field, 'post_') ) {
1694 $field_no_prefix = str_replace('post_', '', $field);
1697 if ( 'edit' == $context ) {
1698 $format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password');
1701 $value = apply_filters("edit_{$field}", $value, $post_id);
1703 $value = apply_filters("{$field_no_prefix}_edit_pre", $value, $post_id);
1705 $value = apply_filters("edit_post_{$field}", $value, $post_id);
1708 if ( in_array($field, $format_to_edit) ) {
1709 if ( 'post_content' == $field )
1710 $value = format_to_edit($value, user_can_richedit());
1712 $value = format_to_edit($value);
1714 $value = esc_attr($value);
1716 } else if ( 'db' == $context ) {
1718 $value = apply_filters("pre_{$field}", $value);
1719 $value = apply_filters("{$field_no_prefix}_save_pre", $value);
1721 $value = apply_filters("pre_post_{$field}", $value);
1722 $value = apply_filters("{$field}_pre", $value);
1725 // Use display filters by default.
1727 $value = apply_filters($field, $value, $post_id, $context);
1729 $value = apply_filters("post_{$field}", $value, $post_id, $context);
1732 if ( 'attribute' == $context )
1733 $value = esc_attr($value);
1734 else if ( 'js' == $context )
1735 $value = esc_js($value);
1741 * Make a post sticky.
1743 * Sticky posts should be displayed at the top of the front page.
1747 * @param int $post_id Post ID.
1749 function stick_post($post_id) {
1750 $stickies = get_option('sticky_posts');
1752 if ( !is_array($stickies) )
1753 $stickies = array($post_id);
1755 if ( ! in_array($post_id, $stickies) )
1756 $stickies[] = $post_id;
1758 update_option('sticky_posts', $stickies);
1764 * Sticky posts should be displayed at the top of the front page.
1768 * @param int $post_id Post ID.
1770 function unstick_post($post_id) {
1771 $stickies = get_option('sticky_posts');
1773 if ( !is_array($stickies) )
1776 if ( ! in_array($post_id, $stickies) )
1779 $offset = array_search($post_id, $stickies);
1780 if ( false === $offset )
1783 array_splice($stickies, $offset, 1);
1785 update_option('sticky_posts', $stickies);
1789 * Count number of posts of a post type and is user has permissions to view.
1791 * This function provides an efficient method of finding the amount of post's
1792 * type a blog has. Another method is to count the amount of items in
1793 * get_posts(), but that method has a lot of overhead with doing so. Therefore,
1794 * when developing for 2.5+, use this function instead.
1796 * The $perm parameter checks for 'readable' value and if the user can read
1797 * private posts, it will display that for the user that is signed in.
1800 * @link http://codex.wordpress.org/Template_Tags/wp_count_posts
1802 * @param string $type Optional. Post type to retrieve count
1803 * @param string $perm Optional. 'readable' or empty.
1804 * @return object Number of posts for each status
1806 function wp_count_posts( $type = 'post', $perm = '' ) {
1809 $user = wp_get_current_user();
1813 $query = "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s";
1814 if ( 'readable' == $perm && is_user_logged_in() ) {
1815 $post_type_object = get_post_type_object($type);
1816 if ( !current_user_can( $post_type_object->cap->read_private_posts ) ) {
1817 $cache_key .= '_' . $perm . '_' . $user->ID;
1818 $query .= " AND (post_status != 'private' OR ( post_author = '$user->ID' AND post_status = 'private' ))";
1821 $query .= ' GROUP BY post_status';
1823 $count = wp_cache_get($cache_key, 'counts');
1824 if ( false !== $count )
1827 $count = $wpdb->get_results( $wpdb->prepare( $query, $type ), ARRAY_A );
1830 foreach ( get_post_stati() as $state )
1833 foreach ( (array) $count as $row )
1834 $stats[$row['post_status']] = $row['num_posts'];
1836 $stats = (object) $stats;
1837 wp_cache_set($cache_key, $stats, 'counts');
1844 * Count number of attachments for the mime type(s).
1846 * If you set the optional mime_type parameter, then an array will still be
1847 * returned, but will only have the item you are looking for. It does not give
1848 * you the number of attachments that are children of a post. You can get that
1849 * by counting the number of children that post has.
1853 * @param string|array $mime_type Optional. Array or comma-separated list of MIME patterns.
1854 * @return array Number of posts for each mime type.
1856 function wp_count_attachments( $mime_type = '' ) {
1859 $and = wp_post_mime_type_where( $mime_type );
1860 $count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' $and GROUP BY post_mime_type", ARRAY_A );
1863 foreach( (array) $count as $row ) {
1864 $stats[$row['post_mime_type']] = $row['num_posts'];
1866 $stats['trash'] = $wpdb->get_var( "SELECT COUNT( * ) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status = 'trash' $and");
1868 return (object) $stats;
1872 * Check a MIME-Type against a list.
1874 * If the wildcard_mime_types parameter is a string, it must be comma separated
1875 * list. If the real_mime_types is a string, it is also comma separated to
1880 * @param string|array $wildcard_mime_types e.g. audio/mpeg or image (same as image/*) or
1881 * flash (same as *flash*).
1882 * @param string|array $real_mime_types post_mime_type values
1883 * @return array array(wildcard=>array(real types))
1885 function wp_match_mime_types($wildcard_mime_types, $real_mime_types) {
1887 if ( is_string($wildcard_mime_types) )
1888 $wildcard_mime_types = array_map('trim', explode(',', $wildcard_mime_types));
1889 if ( is_string($real_mime_types) )
1890 $real_mime_types = array_map('trim', explode(',', $real_mime_types));
1891 $wild = '[-._a-z0-9]*';
1892 foreach ( (array) $wildcard_mime_types as $type ) {
1893 $type = str_replace('*', $wild, $type);
1894 $patternses[1][$type] = "^$type$";
1895 if ( false === strpos($type, '/') ) {
1896 $patternses[2][$type] = "^$type/";
1897 $patternses[3][$type] = $type;
1901 foreach ( $patternses as $patterns )
1902 foreach ( $patterns as $type => $pattern )
1903 foreach ( (array) $real_mime_types as $real )
1904 if ( preg_match("#$pattern#", $real) && ( empty($matches[$type]) || false === array_search($real, $matches[$type]) ) )
1905 $matches[$type][] = $real;
1910 * Convert MIME types into SQL.
1914 * @param string|array $post_mime_types List of mime types or comma separated string of mime types.
1915 * @param string $table_alias Optional. Specify a table alias, if needed.
1916 * @return string The SQL AND clause for mime searching.
1918 function wp_post_mime_type_where($post_mime_types, $table_alias = '') {
1920 $wildcards = array('', '%', '%/%');
1921 if ( is_string($post_mime_types) )
1922 $post_mime_types = array_map('trim', explode(',', $post_mime_types));
1923 foreach ( (array) $post_mime_types as $mime_type ) {
1924 $mime_type = preg_replace('/\s/', '', $mime_type);
1925 $slashpos = strpos($mime_type, '/');
1926 if ( false !== $slashpos ) {
1927 $mime_group = preg_replace('/[^-*.a-zA-Z0-9]/', '', substr($mime_type, 0, $slashpos));
1928 $mime_subgroup = preg_replace('/[^-*.+a-zA-Z0-9]/', '', substr($mime_type, $slashpos + 1));
1929 if ( empty($mime_subgroup) )
1930 $mime_subgroup = '*';
1932 $mime_subgroup = str_replace('/', '', $mime_subgroup);
1933 $mime_pattern = "$mime_group/$mime_subgroup";
1935 $mime_pattern = preg_replace('/[^-*.a-zA-Z0-9]/', '', $mime_type);
1936 if ( false === strpos($mime_pattern, '*') )
1937 $mime_pattern .= '/*';
1940 $mime_pattern = preg_replace('/\*+/', '%', $mime_pattern);
1942 if ( in_array( $mime_type, $wildcards ) )
1945 if ( false !== strpos($mime_pattern, '%') )
1946 $wheres[] = empty($table_alias) ? "post_mime_type LIKE '$mime_pattern'" : "$table_alias.post_mime_type LIKE '$mime_pattern'";
1948 $wheres[] = empty($table_alias) ? "post_mime_type = '$mime_pattern'" : "$table_alias.post_mime_type = '$mime_pattern'";
1950 if ( !empty($wheres) )
1951 $where = ' AND (' . join(' OR ', $wheres) . ') ';
1956 * Trashes or deletes a post or page.
1958 * When the post and page is permanently deleted, everything that is tied to it is deleted also.
1959 * This includes comments, post meta fields, and terms associated with the post.
1961 * The post or page is moved to trash instead of permanently deleted unless trash is
1962 * disabled, item is already in the trash, or $force_delete is true.
1965 * @uses do_action() on 'delete_post' before deletion unless post type is 'attachment'.
1966 * @uses do_action() on 'deleted_post' after deletion unless post type is 'attachment'.
1967 * @uses wp_delete_attachment() if post type is 'attachment'.
1968 * @uses wp_trash_post() if item should be trashed.
1970 * @param int $postid Post ID.
1971 * @param bool $force_delete Whether to bypass trash and force deletion. Defaults to false.
1972 * @return mixed False on failure
1974 function wp_delete_post( $postid = 0, $force_delete = false ) {
1975 global $wpdb, $wp_rewrite;
1977 if ( !$post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
1980 if ( !$force_delete && ( $post->post_type == 'post' || $post->post_type == 'page') && get_post_status( $postid ) != 'trash' && EMPTY_TRASH_DAYS )
1981 return wp_trash_post($postid);
1983 if ( $post->post_type == 'attachment' )
1984 return wp_delete_attachment( $postid, $force_delete );
1986 do_action('before_delete_post', $postid);
1988 delete_post_meta($postid,'_wp_trash_meta_status');
1989 delete_post_meta($postid,'_wp_trash_meta_time');
1991 wp_delete_object_term_relationships($postid, get_object_taxonomies($post->post_type));
1993 $parent_data = array( 'post_parent' => $post->post_parent );
1994 $parent_where = array( 'post_parent' => $postid );
1996 if ( 'page' == $post->post_type) {
1997 // if the page is defined in option page_on_front or post_for_posts,
1998 // adjust the corresponding options
1999 if ( get_option('page_on_front') == $postid ) {
2000 update_option('show_on_front', 'posts');
2001 delete_option('page_on_front');
2003 if ( get_option('page_for_posts') == $postid ) {
2004 delete_option('page_for_posts');
2007 // Point children of this page to its parent, also clean the cache of affected children
2008 $children_query = $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE post_parent = %d AND post_type='page'", $postid);
2009 $children = $wpdb->get_results($children_query);
2011 $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'page' ) );
2013 unstick_post($postid);
2016 // Do raw query. wp_get_post_revisions() is filtered
2017 $revision_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_parent = %d AND post_type = 'revision'", $postid ) );
2018 // Use wp_delete_post (via wp_delete_post_revision) again. Ensures any meta/misplaced data gets cleaned up.
2019 foreach ( $revision_ids as $revision_id )
2020 wp_delete_post_revision( $revision_id );
2022 // Point all attachments to this post up one level
2023 $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'attachment' ) );
2025 $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
2026 if ( ! empty($comment_ids) ) {
2027 do_action( 'delete_comment', $comment_ids );
2028 foreach ( $comment_ids as $comment_id )
2029 wp_delete_comment( $comment_id, true );
2030 do_action( 'deleted_comment', $comment_ids );
2033 $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid ));
2034 if ( !empty($post_meta_ids) ) {
2035 do_action( 'delete_postmeta', $post_meta_ids );
2036 $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'";
2037 $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" );
2038 do_action( 'deleted_postmeta', $post_meta_ids );
2041 do_action( 'delete_post', $postid );
2042 $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid ));
2043 do_action( 'deleted_post', $postid );
2045 if ( 'page' == $post->post_type ) {
2046 clean_page_cache($postid);
2048 foreach ( (array) $children as $child )
2049 clean_page_cache($child->ID);
2051 $wp_rewrite->flush_rules(false);
2053 clean_post_cache($postid);
2056 wp_clear_scheduled_hook('publish_future_post', array( $postid ) );
2058 do_action('after_delete_post', $postid);
2064 * Moves a post or page to the Trash
2066 * If trash is disabled, the post or page is permanently deleted.
2069 * @uses do_action() on 'trash_post' before trashing
2070 * @uses do_action() on 'trashed_post' after trashing
2071 * @uses wp_delete_post() if trash is disabled
2073 * @param int $post_id Post ID.
2074 * @return mixed False on failure
2076 function wp_trash_post($post_id = 0) {
2077 if ( !EMPTY_TRASH_DAYS )
2078 return wp_delete_post($post_id, true);
2080 if ( !$post = wp_get_single_post($post_id, ARRAY_A) )
2083 if ( $post['post_status'] == 'trash' )
2086 do_action('trash_post', $post_id);
2088 add_post_meta($post_id,'_wp_trash_meta_status', $post['post_status']);
2089 add_post_meta($post_id,'_wp_trash_meta_time', time());
2091 $post['post_status'] = 'trash';
2092 wp_insert_post($post);
2094 wp_trash_post_comments($post_id);
2096 do_action('trashed_post', $post_id);
2102 * Restores a post or page from the Trash
2105 * @uses do_action() on 'untrash_post' before undeletion
2106 * @uses do_action() on 'untrashed_post' after undeletion
2108 * @param int $post_id Post ID.
2109 * @return mixed False on failure
2111 function wp_untrash_post($post_id = 0) {
2112 if ( !$post = wp_get_single_post($post_id, ARRAY_A) )
2115 if ( $post['post_status'] != 'trash' )
2118 do_action('untrash_post', $post_id);
2120 $post_status = get_post_meta($post_id, '_wp_trash_meta_status', true);
2122 $post['post_status'] = $post_status;
2124 delete_post_meta($post_id, '_wp_trash_meta_status');
2125 delete_post_meta($post_id, '_wp_trash_meta_time');
2127 wp_insert_post($post);
2129 wp_untrash_post_comments($post_id);
2131 do_action('untrashed_post', $post_id);
2137 * Moves comments for a post to the trash
2140 * @uses do_action() on 'trash_post_comments' before trashing
2141 * @uses do_action() on 'trashed_post_comments' after trashing
2143 * @param int $post Post ID or object.
2144 * @return mixed False on failure
2146 function wp_trash_post_comments($post = null) {
2149 $post = get_post($post);
2153 $post_id = $post->ID;
2155 do_action('trash_post_comments', $post_id);
2157 $comments = $wpdb->get_results( $wpdb->prepare("SELECT comment_ID, comment_approved FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id) );
2158 if ( empty($comments) )
2161 // Cache current status for each comment
2162 $statuses = array();
2163 foreach ( $comments as $comment )
2164 $statuses[$comment->comment_ID] = $comment->comment_approved;
2165 add_post_meta($post_id, '_wp_trash_meta_comments_status', $statuses);
2167 // Set status for all comments to post-trashed
2168 $result = $wpdb->update($wpdb->comments, array('comment_approved' => 'post-trashed'), array('comment_post_ID' => $post_id));
2170 clean_comment_cache( array_keys($statuses) );
2172 do_action('trashed_post_comments', $post_id, $statuses);
2178 * Restore comments for a post from the trash
2181 * @uses do_action() on 'untrash_post_comments' before trashing
2182 * @uses do_action() on 'untrashed_post_comments' after trashing
2184 * @param int $post Post ID or object.
2185 * @return mixed False on failure
2187 function wp_untrash_post_comments($post = null) {
2190 $post = get_post($post);
2194 $post_id = $post->ID;
2196 $statuses = get_post_meta($post_id, '_wp_trash_meta_comments_status', true);
2198 if ( empty($statuses) )
2201 do_action('untrash_post_comments', $post_id);
2203 // Restore each comment to its original status
2204 $group_by_status = array();
2205 foreach ( $statuses as $comment_id => $comment_status )
2206 $group_by_status[$comment_status][] = $comment_id;
2208 foreach ( $group_by_status as $status => $comments ) {
2209 // Sanity check. This shouldn't happen.
2210 if ( 'post-trashed' == $status )
2212 $comments_in = implode( "', '", $comments );
2213 $wpdb->query( "UPDATE $wpdb->comments SET comment_approved = '$status' WHERE comment_ID IN ('" . $comments_in . "')" );
2216 clean_comment_cache( array_keys($statuses) );
2218 delete_post_meta($post_id, '_wp_trash_meta_comments_status');
2220 do_action('untrashed_post_comments', $post_id);
2224 * Retrieve the list of categories for a post.
2226 * Compatibility layer for themes and plugins. Also an easy layer of abstraction
2227 * away from the complexity of the taxonomy layer.
2231 * @uses wp_get_object_terms() Retrieves the categories. Args details can be found here.
2233 * @param int $post_id Optional. The Post ID.
2234 * @param array $args Optional. Overwrite the defaults.
2237 function wp_get_post_categories( $post_id = 0, $args = array() ) {
2238 $post_id = (int) $post_id;
2240 $defaults = array('fields' => 'ids');
2241 $args = wp_parse_args( $args, $defaults );
2243 $cats = wp_get_object_terms($post_id, 'category', $args);
2248 * Retrieve the tags for a post.
2250 * There is only one default for this function, called 'fields' and by default
2251 * is set to 'all'. There are other defaults that can be overridden in
2252 * {@link wp_get_object_terms()}.
2254 * @package WordPress
2258 * @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
2260 * @param int $post_id Optional. The Post ID
2261 * @param array $args Optional. Overwrite the defaults
2262 * @return array List of post tags.
2264 function wp_get_post_tags( $post_id = 0, $args = array() ) {
2265 return wp_get_post_terms( $post_id, 'post_tag', $args);
2269 * Retrieve the terms for a post.
2271 * There is only one default for this function, called 'fields' and by default
2272 * is set to 'all'. There are other defaults that can be overridden in
2273 * {@link wp_get_object_terms()}.
2275 * @package WordPress
2279 * @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
2281 * @param int $post_id Optional. The Post ID
2282 * @param string $taxonomy The taxonomy for which to retrieve terms. Defaults to post_tag.
2283 * @param array $args Optional. Overwrite the defaults
2284 * @return array List of post tags.
2286 function wp_get_post_terms( $post_id = 0, $taxonomy = 'post_tag', $args = array() ) {
2287 $post_id = (int) $post_id;
2289 $defaults = array('fields' => 'all');
2290 $args = wp_parse_args( $args, $defaults );
2292 $tags = wp_get_object_terms($post_id, $taxonomy, $args);
2298 * Retrieve number of recent posts.
2301 * @uses wp_parse_args()
2304 * @param string $deprecated Deprecated.
2305 * @param array $args Optional. Overrides defaults.
2306 * @param string $output Optional.
2309 function wp_get_recent_posts( $args = array(), $output = ARRAY_A ) {
2311 if ( is_numeric( $args ) ) {
2312 _deprecated_argument( __FUNCTION__, '3.1', __( 'Passing an integer number of posts is deprecated. Pass an array of arguments instead.' ) );
2313 $args = array( 'numberposts' => absint( $args ) );
2316 // Set default arguments
2318 'numberposts' => 10, 'offset' => 0,
2319 'category' => 0, 'orderby' => 'post_date',
2320 'order' => 'DESC', 'include' => '',
2321 'exclude' => '', 'meta_key' => '',
2322 'meta_value' =>'', 'post_type' => 'post', 'post_status' => 'draft, publish, future, pending, private',
2323 'suppress_filters' => true
2326 $r = wp_parse_args( $args, $defaults );
2328 $results = get_posts( $r );
2330 // Backward compatibility. Prior to 3.1 expected posts to be returned in array
2331 if ( ARRAY_A == $output ){
2332 foreach( $results as $key => $result ) {
2333 $results[$key] = get_object_vars( $result );
2335 return $results ? $results : array();
2338 return $results ? $results : false;
2343 * Retrieve a single post, based on post ID.
2345 * Has categories in 'post_category' property or key. Has tags in 'tags_input'
2350 * @param int $postid Post ID.
2351 * @param string $mode How to return result, either OBJECT, ARRAY_N, or ARRAY_A.
2352 * @return object|array Post object or array holding post contents and information
2354 function wp_get_single_post($postid = 0, $mode = OBJECT) {
2355 $postid = (int) $postid;
2357 $post = get_post($postid, $mode);
2360 ( OBJECT == $mode && empty( $post->ID ) ) ||
2361 ( OBJECT != $mode && empty( $post['ID'] ) )
2363 return ( OBJECT == $mode ? null : array() );
2365 // Set categories and tags
2366 if ( $mode == OBJECT ) {
2367 $post->post_category = array();
2368 if ( is_object_in_taxonomy($post->post_type, 'category') )
2369 $post->post_category = wp_get_post_categories($postid);
2370 $post->tags_input = array();
2371 if ( is_object_in_taxonomy($post->post_type, 'post_tag') )
2372 $post->tags_input = wp_get_post_tags($postid, array('fields' => 'names'));
2374 $post['post_category'] = array();
2375 if ( is_object_in_taxonomy($post['post_type'], 'category') )
2376 $post['post_category'] = wp_get_post_categories($postid);
2377 $post['tags_input'] = array();
2378 if ( is_object_in_taxonomy($post['post_type'], 'post_tag') )
2379 $post['tags_input'] = wp_get_post_tags($postid, array('fields' => 'names'));
2388 * If the $postarr parameter has 'ID' set to a value, then post will be updated.
2390 * You can set the post date manually, but setting the values for 'post_date'
2391 * and 'post_date_gmt' keys. You can close the comments or open the comments by
2392 * setting the value for 'comment_status' key.
2394 * The defaults for the parameter $postarr are:
2395 * 'post_status' - Default is 'draft'.
2396 * 'post_type' - Default is 'post'.
2397 * 'post_author' - Default is current user ID ($user_ID). The ID of the user who added the post.
2398 * 'ping_status' - Default is the value in 'default_ping_status' option.
2399 * Whether the attachment can accept pings.
2400 * 'post_parent' - Default is 0. Set this for the post it belongs to, if any.
2401 * 'menu_order' - Default is 0. The order it is displayed.
2402 * 'to_ping' - Whether to ping.
2403 * 'pinged' - Default is empty string.
2404 * 'post_password' - Default is empty string. The password to access the attachment.
2405 * 'guid' - Global Unique ID for referencing the attachment.
2406 * 'post_content_filtered' - Post content filtered.
2407 * 'post_excerpt' - Post excerpt.
2413 * @uses do_action() Calls 'pre_post_update' on post ID if this is an update.
2414 * @uses do_action() Calls 'edit_post' action on post ID and post data if this is an update.
2415 * @uses do_action() Calls 'save_post' and 'wp_insert_post' on post id and post data just before returning.
2416 * @uses apply_filters() Calls 'wp_insert_post_data' passing $data, $postarr prior to database update or insert.
2417 * @uses wp_transition_post_status()
2419 * @param array $postarr Elements that make up post to insert.
2420 * @param bool $wp_error Optional. Allow return of WP_Error on failure.
2421 * @return int|WP_Error The value 0 or WP_Error on failure. The post ID on success.
2423 function wp_insert_post($postarr, $wp_error = false) {
2424 global $wpdb, $wp_rewrite, $user_ID;
2426 $defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
2427 'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
2428 'menu_order' => 0, 'to_ping' => '', 'pinged' => '', 'post_password' => '',
2429 'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0,
2430 'post_content' => '', 'post_title' => '');
2432 $postarr = wp_parse_args($postarr, $defaults);
2434 unset( $postarr[ 'filter' ] );
2436 $postarr = sanitize_post($postarr, 'db');
2438 // export array as variables
2439 extract($postarr, EXTR_SKIP);
2441 // Are we updating or creating?
2443 if ( !empty($ID) ) {
2445 $previous_status = get_post_field('post_status', $ID);
2447 $previous_status = 'new';
2450 if ( ('' == $post_content) && ('' == $post_title) && ('' == $post_excerpt) && ('attachment' != $post_type) ) {
2452 return new WP_Error('empty_content', __('Content, title, and excerpt are empty.'));
2457 if ( empty($post_type) )
2458 $post_type = 'post';
2460 if ( empty($post_status) )
2461 $post_status = 'draft';
2463 if ( !empty($post_category) )
2464 $post_category = array_filter($post_category); // Filter out empty terms
2466 // Make sure we set a valid category.
2467 if ( empty($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
2468 // 'post' requires at least one category.
2469 if ( 'post' == $post_type && 'auto-draft' != $post_status )
2470 $post_category = array( get_option('default_category') );
2472 $post_category = array();
2475 if ( empty($post_author) )
2476 $post_author = $user_ID;
2480 // Get the post ID and GUID
2482 $post_ID = (int) $ID;
2483 $guid = get_post_field( 'guid', $post_ID );
2484 $post_before = get_post($post_ID);
2487 // Don't allow contributors to set the post slug for pending review posts
2488 if ( 'pending' == $post_status && !current_user_can( 'publish_posts' ) )
2491 // Create a valid post name. Drafts and pending posts are allowed to have an empty
2493 if ( empty($post_name) ) {
2494 if ( !in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
2495 $post_name = sanitize_title($post_title);
2499 $post_name = sanitize_title($post_name);
2502 // 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
2503 if ( empty($post_date) || '0000-00-00 00:00:00' == $post_date )
2504 $post_date = current_time('mysql');
2506 if ( empty($post_date_gmt) || '0000-00-00 00:00:00' == $post_date_gmt ) {
2507 if ( !in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
2508 $post_date_gmt = get_gmt_from_date($post_date);
2510 $post_date_gmt = '0000-00-00 00:00:00';
2513 if ( $update || '0000-00-00 00:00:00' == $post_date ) {
2514 $post_modified = current_time( 'mysql' );
2515 $post_modified_gmt = current_time( 'mysql', 1 );
2517 $post_modified = $post_date;
2518 $post_modified_gmt = $post_date_gmt;
2521 if ( 'publish' == $post_status ) {
2522 $now = gmdate('Y-m-d H:i:59');
2523 if ( mysql2date('U', $post_date_gmt, false) > mysql2date('U', $now, false) )
2524 $post_status = 'future';
2525 } elseif( 'future' == $post_status ) {
2526 $now = gmdate('Y-m-d H:i:59');
2527 if ( mysql2date('U', $post_date_gmt, false) <= mysql2date('U', $now, false) )
2528 $post_status = 'publish';
2531 if ( empty($comment_status) ) {
2533 $comment_status = 'closed';
2535 $comment_status = get_option('default_comment_status');
2537 if ( empty($ping_status) )
2538 $ping_status = get_option('default_ping_status');
2540 if ( isset($to_ping) )
2541 $to_ping = preg_replace('|\s+|', "\n", $to_ping);
2545 if ( ! isset($pinged) )
2548 if ( isset($post_parent) )
2549 $post_parent = (int) $post_parent;
2553 // Check the post_parent to see if it will cause a hierarchy loop
2554 $post_parent = apply_filters( 'wp_insert_post_parent', $post_parent, $post_ID, compact( array_keys( $postarr ) ), $postarr );
2556 if ( isset($menu_order) )
2557 $menu_order = (int) $menu_order;
2561 if ( !isset($post_password) || 'private' == $post_status )
2562 $post_password = '';
2564 $post_name = wp_unique_post_slug($post_name, $post_ID, $post_status, $post_type, $post_parent);
2566 // expected_slashed (everything!)
2567 $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' ) );
2568 $data = apply_filters('wp_insert_post_data', $data, $postarr);
2569 $data = stripslashes_deep( $data );
2570 $where = array( 'ID' => $post_ID );
2573 do_action( 'pre_post_update', $post_ID );
2574 if ( false === $wpdb->update( $wpdb->posts, $data, $where ) ) {
2576 return new WP_Error('db_update_error', __('Could not update post in the database'), $wpdb->last_error);
2581 if ( isset($post_mime_type) )
2582 $data['post_mime_type'] = stripslashes( $post_mime_type ); // This isn't in the update
2583 // If there is a suggested ID, use it if not already present
2584 if ( !empty($import_id) ) {
2585 $import_id = (int) $import_id;
2586 if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
2587 $data['ID'] = $import_id;
2590 if ( false === $wpdb->insert( $wpdb->posts, $data ) ) {
2592 return new WP_Error('db_insert_error', __('Could not insert post into the database'), $wpdb->last_error);
2596 $post_ID = (int) $wpdb->insert_id;
2598 // use the newly generated $post_ID
2599 $where = array( 'ID' => $post_ID );
2602 if ( empty($data['post_name']) && !in_array( $data['post_status'], array( 'draft', 'pending', 'auto-draft' ) ) ) {
2603 $data['post_name'] = sanitize_title($data['post_title'], $post_ID);
2604 $wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
2607 if ( is_object_in_taxonomy($post_type, 'category') )
2608 wp_set_post_categories( $post_ID, $post_category );
2610 if ( isset( $tags_input ) && is_object_in_taxonomy($post_type, 'post_tag') )
2611 wp_set_post_tags( $post_ID, $tags_input );
2613 // new-style support for all custom taxonomies
2614 if ( !empty($tax_input) ) {
2615 foreach ( $tax_input as $taxonomy => $tags ) {
2616 $taxonomy_obj = get_taxonomy($taxonomy);
2617 if ( is_array($tags) ) // array = hierarchical, string = non-hierarchical.
2618 $tags = array_filter($tags);
2619 if ( current_user_can($taxonomy_obj->cap->assign_terms) )
2620 wp_set_post_terms( $post_ID, $tags, $taxonomy );
2624 $current_guid = get_post_field( 'guid', $post_ID );
2626 if ( 'page' == $data['post_type'] )
2627 clean_page_cache($post_ID);
2629 clean_post_cache($post_ID);
2632 if ( !$update && '' == $current_guid )
2633 $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post_ID ) ), $where );
2635 $post = get_post($post_ID);
2637 if ( !empty($page_template) && 'page' == $data['post_type'] ) {
2638 $post->page_template = $page_template;
2639 $page_templates = get_page_templates();
2640 if ( 'default' != $page_template && !in_array($page_template, $page_templates) ) {
2642 return new WP_Error('invalid_page_template', __('The page template is invalid.'));
2646 update_post_meta($post_ID, '_wp_page_template', $page_template);
2649 wp_transition_post_status($data['post_status'], $previous_status, $post);
2652 do_action('edit_post', $post_ID, $post);
2653 $post_after = get_post($post_ID);
2654 do_action( 'post_updated', $post_ID, $post_after, $post_before);
2657 do_action('save_post', $post_ID, $post);
2658 do_action('wp_insert_post', $post_ID, $post);
2664 * Update a post with new post data.
2666 * The date does not have to be set for drafts. You can set the date and it will
2667 * not be overridden.
2671 * @param array|object $postarr Post data. Arrays are expected to be escaped, objects are not.
2672 * @return int 0 on failure, Post ID on success.
2674 function wp_update_post($postarr = array()) {
2675 if ( is_object($postarr) ) {
2676 // non-escaped post was passed
2677 $postarr = get_object_vars($postarr);
2678 $postarr = add_magic_quotes($postarr);
2681 // First, get all of the original fields
2682 $post = wp_get_single_post($postarr['ID'], ARRAY_A);
2684 // Escape data pulled from DB.
2685 $post = add_magic_quotes($post);
2687 // Passed post category list overwrites existing category list if not empty.
2688 if ( isset($postarr['post_category']) && is_array($postarr['post_category'])
2689 && 0 != count($postarr['post_category']) )
2690 $post_cats = $postarr['post_category'];
2692 $post_cats = $post['post_category'];
2694 // Drafts shouldn't be assigned a date unless explicitly done so by the user
2695 if ( isset( $post['post_status'] ) && in_array($post['post_status'], array('draft', 'pending', 'auto-draft')) && empty($postarr['edit_date']) &&
2696 ('0000-00-00 00:00:00' == $post['post_date_gmt']) )
2699 $clear_date = false;
2701 // Merge old and new fields with new fields overwriting old ones.
2702 $postarr = array_merge($post, $postarr);
2703 $postarr['post_category'] = $post_cats;
2704 if ( $clear_date ) {
2705 $postarr['post_date'] = current_time('mysql');
2706 $postarr['post_date_gmt'] = '';
2709 if ($postarr['post_type'] == 'attachment')
2710 return wp_insert_attachment($postarr);
2712 return wp_insert_post($postarr);
2716 * Publish a post by transitioning the post status.
2720 * @uses do_action() Calls 'edit_post', 'save_post', and 'wp_insert_post' on post_id and post data.
2722 * @param int $post_id Post ID.
2725 function wp_publish_post($post_id) {
2728 $post = get_post($post_id);
2733 if ( 'publish' == $post->post_status )
2736 $wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post_id ) );
2738 $old_status = $post->post_status;
2739 $post->post_status = 'publish';
2740 wp_transition_post_status('publish', $old_status, $post);
2742 // Update counts for the post's terms.
2743 foreach ( (array) get_object_taxonomies('post') as $taxonomy ) {
2744 $tt_ids = wp_get_object_terms($post_id, $taxonomy, array('fields' => 'tt_ids'));
2745 wp_update_term_count($tt_ids, $taxonomy);
2748 do_action('edit_post', $post_id, $post);
2749 do_action('save_post', $post_id, $post);
2750 do_action('wp_insert_post', $post_id, $post);
2754 * Publish future post and make sure post ID has future post status.
2756 * Invoked by cron 'publish_future_post' event. This safeguard prevents cron
2757 * from publishing drafts, etc.
2761 * @param int $post_id Post ID.
2762 * @return null Nothing is returned. Which can mean that no action is required or post was published.
2764 function check_and_publish_future_post($post_id) {
2766 $post = get_post($post_id);
2771 if ( 'future' != $post->post_status )
2774 $time = strtotime( $post->post_date_gmt . ' GMT' );
2776 if ( $time > time() ) { // Uh oh, someone jumped the gun!
2777 wp_clear_scheduled_hook( 'publish_future_post', array( $post_id ) ); // clear anything else in the system
2778 wp_schedule_single_event( $time, 'publish_future_post', array( $post_id ) );
2782 return wp_publish_post($post_id);
2787 * Computes a unique slug for the post, when given the desired slug and some post details.
2791 * @global wpdb $wpdb
2792 * @global WP_Rewrite $wp_rewrite
2793 * @param string $slug the desired slug (post_name)
2794 * @param integer $post_ID
2795 * @param string $post_status no uniqueness checks are made if the post is still draft or pending
2796 * @param string $post_type
2797 * @param integer $post_parent
2798 * @return string unique slug for the post, based on $post_name (with a -1, -2, etc. suffix)
2800 function wp_unique_post_slug( $slug, $post_ID, $post_status, $post_type, $post_parent ) {
2801 if ( in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) )
2804 global $wpdb, $wp_rewrite;
2806 $feeds = $wp_rewrite->feeds;
2807 if ( ! is_array( $feeds ) )
2810 $hierarchical_post_types = get_post_types( array('hierarchical' => true) );
2811 if ( 'attachment' == $post_type ) {
2812 // Attachment slugs must be unique across all types.
2813 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND ID != %d LIMIT 1";
2814 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID ) );
2816 if ( $post_name_check || in_array( $slug, $feeds ) || apply_filters( 'wp_unique_post_slug_is_bad_attachment_slug', false, $slug ) ) {
2819 $alt_post_name = substr ($slug, 0, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
2820 $post_name_check = $wpdb->get_var( $wpdb->prepare($check_sql, $alt_post_name, $post_ID ) );
2822 } while ( $post_name_check );
2823 $slug = $alt_post_name;
2825 } elseif ( in_array( $post_type, $hierarchical_post_types ) ) {
2826 // Page slugs must be unique within their own trees. Pages are in a separate
2827 // namespace than posts so page slugs are allowed to overlap post slugs.
2828 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type IN ( '" . implode( "', '", esc_sql( $hierarchical_post_types ) ) . "' ) AND ID != %d AND post_parent = %d LIMIT 1";
2829 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID, $post_parent ) );
2831 if ( $post_name_check || in_array( $slug, $feeds ) || preg_match( "@^($wp_rewrite->pagination_base)?\d+$@", $slug ) || apply_filters( 'wp_unique_post_slug_is_bad_hierarchical_slug', false, $slug, $post_type, $post_parent ) ) {
2834 $alt_post_name = substr( $slug, 0, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
2835 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_ID, $post_parent ) );
2837 } while ( $post_name_check );
2838 $slug = $alt_post_name;
2841 // Post slugs must be unique across all posts.
2842 $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d LIMIT 1";
2843 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_type, $post_ID ) );
2845 if ( $post_name_check || in_array( $slug, $feeds ) || apply_filters( 'wp_unique_post_slug_is_bad_flat_slug', false, $slug, $post_type ) ) {
2848 $alt_post_name = substr( $slug, 0, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
2849 $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_type, $post_ID ) );
2851 } while ( $post_name_check );
2852 $slug = $alt_post_name;
2860 * Adds tags to a post.
2862 * @uses wp_set_post_tags() Same first two parameters, but the last parameter is always set to true.
2864 * @package WordPress
2868 * @param int $post_id Post ID
2869 * @param string $tags The tags to set for the post, separated by commas.
2870 * @return bool|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
2872 function wp_add_post_tags($post_id = 0, $tags = '') {
2873 return wp_set_post_tags($post_id, $tags, true);
2878 * Set the tags for a post.
2881 * @uses wp_set_object_terms() Sets the tags for the post.
2883 * @param int $post_id Post ID.
2884 * @param string $tags The tags to set for the post, separated by commas.
2885 * @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
2886 * @return mixed Array of affected term IDs. WP_Error or false on failure.
2888 function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
2889 return wp_set_post_terms( $post_id, $tags, 'post_tag', $append);
2893 * Set the terms for a post.
2896 * @uses wp_set_object_terms() Sets the tags for the post.
2898 * @param int $post_id Post ID.
2899 * @param string $tags The tags to set for the post, separated by commas.
2900 * @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
2901 * @return mixed Array of affected term IDs. WP_Error or false on failure.
2903 function wp_set_post_terms( $post_id = 0, $tags = '', $taxonomy = 'post_tag', $append = false ) {
2904 $post_id = (int) $post_id;
2912 $tags = is_array($tags) ? $tags : explode( ',', trim($tags, " \n\t\r\0\x0B,") );
2914 // Hierarchical taxonomies must always pass IDs rather than names so that children with the same
2915 // names but different parents aren't confused.
2916 if ( is_taxonomy_hierarchical( $taxonomy ) ) {
2917 $tags = array_map( 'intval', $tags );
2918 $tags = array_unique( $tags );
2921 return wp_set_object_terms($post_id, $tags, $taxonomy, $append);
2925 * Set categories for a post.
2927 * If the post categories parameter is not set, then the default category is
2932 * @param int $post_ID Post ID.
2933 * @param array $post_categories Optional. List of categories.
2934 * @return bool|mixed
2936 function wp_set_post_categories($post_ID = 0, $post_categories = array()) {
2937 $post_ID = (int) $post_ID;
2938 $post_type = get_post_type( $post_ID );
2939 $post_status = get_post_status( $post_ID );
2940 // If $post_categories isn't already an array, make it one:
2941 if ( !is_array($post_categories) || empty($post_categories) ) {
2942 if ( 'post' == $post_type && 'auto-draft' != $post_status )
2943 $post_categories = array( get_option('default_category') );
2945 $post_categories = array();
2946 } else if ( 1 == count($post_categories) && '' == reset($post_categories) ) {
2950 if ( !empty($post_categories) ) {
2951 $post_categories = array_map('intval', $post_categories);
2952 $post_categories = array_unique($post_categories);
2955 return wp_set_object_terms($post_ID, $post_categories, 'category');
2959 * Transition the post status of a post.
2961 * Calls hooks to transition post status.
2963 * The first is 'transition_post_status' with new status, old status, and post data.
2965 * The next action called is 'OLDSTATUS_to_NEWSTATUS' the 'NEWSTATUS' is the
2966 * $new_status parameter and the 'OLDSTATUS' is $old_status parameter; it has the
2969 * The final action is named 'NEWSTATUS_POSTTYPE', 'NEWSTATUS' is from the $new_status
2970 * parameter and POSTTYPE is post_type post data.
2973 * @link http://codex.wordpress.org/Post_Status_Transitions
2975 * @uses do_action() Calls 'transition_post_status' on $new_status, $old_status and
2976 * $post if there is a status change.
2977 * @uses do_action() Calls '{$old_status}_to_{$new_status}' on $post if there is a status change.
2978 * @uses do_action() Calls '{$new_status}_{$post->post_type}' on post ID and $post.
2980 * @param string $new_status Transition to this post status.
2981 * @param string $old_status Previous post status.
2982 * @param object $post Post data.
2984 function wp_transition_post_status($new_status, $old_status, $post) {
2985 do_action('transition_post_status', $new_status, $old_status, $post);
2986 do_action("{$old_status}_to_{$new_status}", $post);
2987 do_action("{$new_status}_{$post->post_type}", $post->ID, $post);
2991 // Trackback and ping functions
2995 * Add a URL to those already pung.
3000 * @param int $post_id Post ID.
3001 * @param string $uri Ping URI.
3002 * @return int How many rows were updated.
3004 function add_ping($post_id, $uri) {
3006 $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
3007 $pung = trim($pung);
3008 $pung = preg_split('/\s/', $pung);
3010 $new = implode("\n", $pung);
3011 $new = apply_filters('add_ping', $new);
3012 // expected_slashed ($new)
3013 $new = stripslashes($new);
3014 return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) );
3018 * Retrieve enclosures already enclosed for a post.
3023 * @param int $post_id Post ID.
3024 * @return array List of enclosures
3026 function get_enclosed($post_id) {
3027 $custom_fields = get_post_custom( $post_id );
3029 if ( !is_array( $custom_fields ) )
3032 foreach ( $custom_fields as $key => $val ) {
3033 if ( 'enclosure' != $key || !is_array( $val ) )
3035 foreach( $val as $enc ) {
3036 $enclosure = split( "\n", $enc );
3037 $pung[] = trim( $enclosure[ 0 ] );
3040 $pung = apply_filters('get_enclosed', $pung, $post_id);
3045 * Retrieve URLs already pinged for a post.
3050 * @param int $post_id Post ID.
3053 function get_pung($post_id) {
3055 $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
3056 $pung = trim($pung);
3057 $pung = preg_split('/\s/', $pung);
3058 $pung = apply_filters('get_pung', $pung);
3063 * Retrieve URLs that need to be pinged.
3068 * @param int $post_id Post ID
3071 function get_to_ping($post_id) {
3073 $to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id ));
3074 $to_ping = trim($to_ping);
3075 $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);
3076 $to_ping = apply_filters('get_to_ping', $to_ping);
3081 * Do trackbacks for a list of URLs.
3085 * @param string $tb_list Comma separated list of URLs
3086 * @param int $post_id Post ID
3088 function trackback_url_list($tb_list, $post_id) {
3089 if ( ! empty( $tb_list ) ) {
3091 $postdata = wp_get_single_post($post_id, ARRAY_A);
3093 // import postdata as variables
3094 extract($postdata, EXTR_SKIP);
3097 $excerpt = strip_tags($post_excerpt ? $post_excerpt : $post_content);
3099 if (strlen($excerpt) > 255) {
3100 $excerpt = substr($excerpt,0,252) . '...';
3103 $trackback_urls = explode(',', $tb_list);
3104 foreach( (array) $trackback_urls as $tb_url) {
3105 $tb_url = trim($tb_url);
3106 trackback($tb_url, stripslashes($post_title), $excerpt, $post_id);
3116 * Get a list of page IDs.
3121 * @return array List of page IDs.
3123 function get_all_page_ids() {
3126 if ( ! $page_ids = wp_cache_get('all_page_ids', 'posts') ) {
3127 $page_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type = 'page'");
3128 wp_cache_add('all_page_ids', $page_ids, 'posts');
3135 * Retrieves page data given a page ID or page object.
3139 * @param mixed $page Page object or page ID. Passed by reference.
3140 * @param string $output What to output. OBJECT, ARRAY_A, or ARRAY_N.
3141 * @param string $filter How the return value should be filtered.
3142 * @return mixed Page data.
3144 function &get_page(&$page, $output = OBJECT, $filter = 'raw') {
3145 $p = get_post($page, $output, $filter);
3150 * Retrieves a page given its path.
3155 * @param string $page_path Page path
3156 * @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A. Default OBJECT.
3157 * @param string $post_type Optional. Post type. Default page.
3158 * @return mixed Null when complete.
3160 function get_page_by_path($page_path, $output = OBJECT, $post_type = 'page') {
3163 $page_path = rawurlencode(urldecode($page_path));
3164 $page_path = str_replace('%2F', '/', $page_path);
3165 $page_path = str_replace('%20', ' ', $page_path);
3166 $page_paths = '/' . trim($page_path, '/');
3167 $leaf_path = sanitize_title(basename($page_paths));
3168 $page_paths = explode('/', $page_paths);
3170 foreach ( (array) $page_paths as $pathdir )
3171 $full_path .= ( $pathdir != '' ? '/' : '' ) . sanitize_title($pathdir);
3173 $pages = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_name = %s AND (post_type = %s OR post_type = 'attachment')", $leaf_path, $post_type ));
3175 if ( empty($pages) )
3178 foreach ( $pages as $page ) {
3179 $path = '/' . $leaf_path;
3181 while ( $curpage->post_parent != 0 ) {
3182 $post_parent = $curpage->post_parent;
3183 $curpage = wp_cache_get( $post_parent, 'posts' );
3184 if ( false === $curpage )
3185 $curpage = $wpdb->get_row( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE ID = %d and post_type = %s", $post_parent, $post_type ) );
3186 $path = '/' . $curpage->post_name . $path;
3189 if ( $path == $full_path )
3190 return get_page($page->ID, $output, $post_type);
3197 * Retrieve a page given its title.
3202 * @param string $page_title Page title
3203 * @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A. Default OBJECT.
3204 * @param string $post_type Optional. Post type. Default page.
3207 function get_page_by_title($page_title, $output = OBJECT, $post_type = 'page' ) {
3209 $page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type= %s", $page_title, $post_type ) );
3211 return get_page($page, $output);
3217 * Retrieve child pages from list of pages matching page ID.
3219 * Matches against the pages parameter against the page ID. Also matches all
3220 * children for the same to retrieve all children of a page. Does not make any
3221 * SQL queries to get the children.
3225 * @param int $page_id Page ID.
3226 * @param array $pages List of pages' objects.
3229 function &get_page_children($page_id, $pages) {
3230 $page_list = array();
3231 foreach ( (array) $pages as $page ) {
3232 if ( $page->post_parent == $page_id ) {
3233 $page_list[] = $page;
3234 if ( $children = get_page_children($page->ID, $pages) )
3235 $page_list = array_merge($page_list, $children);
3242 * Order the pages with children under parents in a flat list.
3244 * It uses auxiliary structure to hold parent-children relationships and
3245 * runs in O(N) complexity
3249 * @param array $pages Posts array.
3250 * @param int $page_id Parent page ID.
3251 * @return array A list arranged by hierarchy. Children immediately follow their parents.
3253 function &get_page_hierarchy( &$pages, $page_id = 0 ) {
3254 if ( empty( $pages ) ) {
3259 $children = array();
3260 foreach ( (array) $pages as $p ) {
3261 $parent_id = intval( $p->post_parent );
3262 $children[ $parent_id ][] = $p;
3266 _page_traverse_name( $page_id, $children, $result );
3272 * function to traverse and return all the nested children post names of a root page.
3273 * $children contains parent-chilren relations
3277 function _page_traverse_name( $page_id, &$children, &$result ){
3278 if ( isset( $children[ $page_id ] ) ){
3279 foreach( (array)$children[ $page_id ] as $child ) {
3280 $result[ $child->ID ] = $child->post_name;
3281 _page_traverse_name( $child->ID, $children, $result );
3287 * Builds URI for a page.
3289 * Sub pages will be in the "directory" under the parent page post name.
3293 * @param mixed $page Page object or page ID.
3294 * @return string Page URI.
3296 function get_page_uri($page) {
3297 if ( ! is_object($page) )
3298 $page = get_page($page);
3299 $uri = $page->post_name;
3301 // A page cannot be it's own parent.
3302 if ( $page->post_parent == $page->ID )
3305 while ($page->post_parent != 0) {
3306 $page = get_page($page->post_parent);
3307 $uri = $page->post_name . "/" . $uri;
3314 * Retrieve a list of pages.
3316 * The defaults that can be overridden are the following: 'child_of',
3317 * 'sort_order', 'sort_column', 'post_title', 'hierarchical', 'exclude',
3318 * 'include', 'meta_key', 'meta_value','authors', 'number', and 'offset'.
3323 * @param mixed $args Optional. Array or string of options that overrides defaults.
3324 * @return array List of pages matching defaults or $args
3326 function &get_pages($args = '') {
3330 'child_of' => 0, 'sort_order' => 'ASC',
3331 'sort_column' => 'post_title', 'hierarchical' => 1,
3332 'exclude' => array(), 'include' => array(),
3333 'meta_key' => '', 'meta_value' => '',
3334 'authors' => '', 'parent' => -1, 'exclude_tree' => '',
3335 'number' => '', 'offset' => 0,
3336 'post_type' => 'page', 'post_status' => 'publish',
3339 $r = wp_parse_args( $args, $defaults );
3340 extract( $r, EXTR_SKIP );
3341 $number = (int) $number;
3342 $offset = (int) $offset;
3344 // Make sure the post type is hierarchical
3345 $hierarchical_post_types = get_post_types( array( 'hierarchical' => true ) );
3346 if ( !in_array( $post_type, $hierarchical_post_types ) )
3349 // Make sure we have a valid post status
3350 if ( !is_array( $post_status ) )
3351 $post_status = explode( ',', $post_status );
3352 if ( array_diff( $post_status, get_post_stati() ) )
3356 $key = md5( serialize( compact(array_keys($defaults)) ) );
3357 if ( $cache = wp_cache_get( 'get_pages', 'posts' ) ) {
3358 if ( is_array($cache) && isset( $cache[ $key ] ) ) {
3359 $pages = apply_filters('get_pages', $cache[ $key ], $r );
3364 if ( !is_array($cache) )
3368 if ( !empty($include) ) {
3369 $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include
3374 $hierarchical = false;
3375 $incpages = wp_parse_id_list( $include );
3376 if ( ! empty( $incpages ) ) {
3377 foreach ( $incpages as $incpage ) {
3378 if (empty($inclusions))
3379 $inclusions = $wpdb->prepare(' AND ( ID = %d ', $incpage);
3381 $inclusions .= $wpdb->prepare(' OR ID = %d ', $incpage);
3385 if (!empty($inclusions))
3389 if ( !empty($exclude) ) {
3390 $expages = wp_parse_id_list( $exclude );
3391 if ( ! empty( $expages ) ) {
3392 foreach ( $expages as $expage ) {
3393 if (empty($exclusions))
3394 $exclusions = $wpdb->prepare(' AND ( ID <> %d ', $expage);
3396 $exclusions .= $wpdb->prepare(' AND ID <> %d ', $expage);
3400 if (!empty($exclusions))
3404 if (!empty($authors)) {
3405 $post_authors = preg_split('/[\s,]+/',$authors);
3407 if ( ! empty( $post_authors ) ) {
3408 foreach ( $post_authors as $post_author ) {
3409 //Do we have an author id or an author login?
3410 if ( 0 == intval($post_author) ) {
3411 $post_author = get_userdatabylogin($post_author);
3412 if ( empty($post_author) )
3414 if ( empty($post_author->ID) )
3416 $post_author = $post_author->ID;
3419 if ( '' == $author_query )
3420 $author_query = $wpdb->prepare(' post_author = %d ', $post_author);
3422 $author_query .= $wpdb->prepare(' OR post_author = %d ', $post_author);
3424 if ( '' != $author_query )
3425 $author_query = " AND ($author_query)";
3430 $where = "$exclusions $inclusions ";
3431 if ( ! empty( $meta_key ) || ! empty( $meta_value ) ) {
3432 $join = " LEFT JOIN $wpdb->postmeta ON ( $wpdb->posts.ID = $wpdb->postmeta.post_id )";
3434 // meta_key and meta_value might be slashed
3435 $meta_key = stripslashes($meta_key);
3436 $meta_value = stripslashes($meta_value);
3437 if ( ! empty( $meta_key ) )
3438 $where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_key = %s", $meta_key);
3439 if ( ! empty( $meta_value ) )
3440 $where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_value = %s", $meta_value);
3445 $where .= $wpdb->prepare(' AND post_parent = %d ', $parent);
3447 if ( 1 == count( $post_status ) ) {
3448 $where_post_type = $wpdb->prepare( "post_type = %s AND post_status = %s", $post_type, array_shift( $post_status ) );
3450 $post_status = implode( "', '", $post_status );
3451 $where_post_type = $wpdb->prepare( "post_type = %s AND post_status IN ('$post_status')", $post_type );
3454 $orderby_array = array();
3455 $allowed_keys = array('author', 'post_author', 'date', 'post_date', 'title', 'post_title', 'modified',
3456 'post_modified', 'modified_gmt', 'post_modified_gmt', 'menu_order', 'parent', 'post_parent',
3457 'ID', 'rand', 'comment_count');
3458 foreach ( explode( ',', $sort_column ) as $orderby ) {
3459 $orderby = trim( $orderby );
3460 if ( !in_array( $orderby, $allowed_keys ) )
3463 switch ( $orderby ) {
3467 $orderby = "$wpdb->posts.ID";
3470 $orderby = 'RAND()';
3472 case 'comment_count':
3473 $orderby = "$wpdb->posts.comment_count";
3476 if ( 0 === strpos( $orderby, 'post_' ) )
3477 $orderby = "$wpdb->posts." . $orderby;
3479 $orderby = "$wpdb->posts.post_" . $orderby;
3482 $orderby_array[] = $orderby;
3485 $sort_column = ! empty( $orderby_array ) ? implode( ',', $orderby_array ) : "$wpdb->posts.post_title";
3487 $sort_order = strtoupper( $sort_order );
3488 if ( '' !== $sort_order && !in_array( $sort_order, array( 'ASC', 'DESC' ) ) )
3489 $sort_order = 'ASC';
3491 $query = "SELECT * FROM $wpdb->posts $join WHERE ($where_post_type) $where ";
3492 $query .= $author_query;
3493 $query .= " ORDER BY " . $sort_column . " " . $sort_order ;
3495 if ( !empty($number) )
3496 $query .= ' LIMIT ' . $offset . ',' . $number;
3498 $pages = $wpdb->get_results($query);
3500 if ( empty($pages) ) {
3501 $pages = apply_filters('get_pages', array(), $r);
3505 // Sanitize before caching so it'll only get done once
3506 $num_pages = count($pages);
3507 for ($i = 0; $i < $num_pages; $i++) {
3508 $pages[$i] = sanitize_post($pages[$i], 'raw');
3512 update_page_cache($pages);
3514 if ( $child_of || $hierarchical )
3515 $pages = & get_page_children($child_of, $pages);
3517 if ( !empty($exclude_tree) ) {
3518 $exclude = (int) $exclude_tree;
3519 $children = get_page_children($exclude, $pages);
3520 $excludes = array();
3521 foreach ( $children as $child )
3522 $excludes[] = $child->ID;
3523 $excludes[] = $exclude;
3524 $num_pages = count($pages);
3525 for ( $i = 0; $i < $num_pages; $i++ ) {
3526 if ( in_array($pages[$i]->ID, $excludes) )
3531 $cache[ $key ] = $pages;
3532 wp_cache_set( 'get_pages', $cache, 'posts' );
3534 $pages = apply_filters('get_pages', $pages, $r);
3540 // Attachment functions
3544 * Check if the attachment URI is local one and is really an attachment.
3548 * @param string $url URL to check
3549 * @return bool True on success, false on failure.
3551 function is_local_attachment($url) {
3552 if (strpos($url, home_url()) === false)
3554 if (strpos($url, home_url('/?attachment_id=')) !== false)
3556 if ( $id = url_to_postid($url) ) {
3557 $post = & get_post($id);
3558 if ( 'attachment' == $post->post_type )
3565 * Insert an attachment.
3567 * If you set the 'ID' in the $object parameter, it will mean that you are
3568 * updating and attempt to update the attachment. You can also set the
3569 * attachment name or title by setting the key 'post_name' or 'post_title'.
3571 * You can set the dates for the attachment manually by setting the 'post_date'
3572 * and 'post_date_gmt' keys' values.
3574 * By default, the comments will use the default settings for whether the
3575 * comments are allowed. You can close them manually or keep them open by
3576 * setting the value for the 'comment_status' key.
3578 * The $object parameter can have the following:
3579 * 'post_status' - Default is 'draft'. Can not be overridden, set the same as parent post.
3580 * 'post_type' - Default is 'post', will be set to attachment. Can not override.
3581 * 'post_author' - Default is current user ID. The ID of the user, who added the attachment.
3582 * 'ping_status' - Default is the value in default ping status option. Whether the attachment
3584 * 'post_parent' - Default is 0. Can use $parent parameter or set this for the post it belongs
3586 * 'menu_order' - Default is 0. The order it is displayed.
3587 * 'to_ping' - Whether to ping.
3588 * 'pinged' - Default is empty string.
3589 * 'post_password' - Default is empty string. The password to access the attachment.
3590 * 'guid' - Global Unique ID for referencing the attachment.
3591 * 'post_content_filtered' - Attachment post content filtered.
3592 * 'post_excerpt' - Attachment excerpt.
3597 * @uses do_action() Calls 'edit_attachment' on $post_ID if this is an update.
3598 * @uses do_action() Calls 'add_attachment' on $post_ID if this is not an update.
3600 * @param string|array $object Arguments to override defaults.
3601 * @param string $file Optional filename.
3602 * @param int $parent Parent post ID.
3603 * @return int Attachment ID.
3605 function wp_insert_attachment($object, $file = false, $parent = 0) {
3606 global $wpdb, $user_ID;
3608 $defaults = array('post_status' => 'inherit', 'post_type' => 'post', 'post_author' => $user_ID,
3609 'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
3610 'menu_order' => 0, 'to_ping' => '', 'pinged' => '', 'post_password' => '',
3611 'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0, 'context' => '');
3613 $object = wp_parse_args($object, $defaults);
3614 if ( !empty($parent) )
3615 $object['post_parent'] = $parent;
3617 unset( $object[ 'filter' ] );
3619 $object = sanitize_post($object, 'db');
3621 // export array as variables
3622 extract($object, EXTR_SKIP);
3624 if ( empty($post_author) )
3625 $post_author = $user_ID;
3627 $post_type = 'attachment';
3629 if ( ! in_array( $post_status, array( 'inherit', 'private' ) ) )
3630 $post_status = 'inherit';
3632 // Make sure we set a valid category.
3633 if ( !isset($post_category) || 0 == count($post_category) || !is_array($post_category) ) {
3634 // 'post' requires at least one category.
3635 if ( 'post' == $post_type )
3636 $post_category = array( get_option('default_category') );
3638 $post_category = array();
3641 // Are we updating or creating?
3642 if ( !empty($ID) ) {
3644 $post_ID = (int) $ID;
3650 // Create a valid post name.
3651 if ( empty($post_name) )
3652 $post_name = sanitize_title($post_title);
3654 $post_name = sanitize_title($post_name);
3656 // expected_slashed ($post_name)
3657 $post_name = wp_unique_post_slug($post_name, $post_ID, $post_status, $post_type, $post_parent);
3659 if ( empty($post_date) )
3660 $post_date = current_time('mysql');
3661 if ( empty($post_date_gmt) )
3662 $post_date_gmt = current_time('mysql', 1);
3664 if ( empty($post_modified) )
3665 $post_modified = $post_date;
3666 if ( empty($post_modified_gmt) )
3667 $post_modified_gmt = $post_date_gmt;
3669 if ( empty($comment_status) ) {
3671 $comment_status = 'closed';
3673 $comment_status = get_option('default_comment_status');
3675 if ( empty($ping_status) )
3676 $ping_status = get_option('default_ping_status');
3678 if ( isset($to_ping) )
3679 $to_ping = preg_replace('|\s+|', "\n", $to_ping);
3683 if ( isset($post_parent) )
3684 $post_parent = (int) $post_parent;
3688 if ( isset($menu_order) )
3689 $menu_order = (int) $menu_order;
3693 if ( !isset($post_password) )
3694 $post_password = '';
3696 if ( ! isset($pinged) )
3699 // expected_slashed (everything!)
3700 $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' ) );
3701 $data = stripslashes_deep( $data );
3704 $wpdb->update( $wpdb->posts, $data, array( 'ID' => $post_ID ) );
3706 // If there is a suggested ID, use it if not already present
3707 if ( !empty($import_id) ) {
3708 $import_id = (int) $import_id;
3709 if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
3710 $data['ID'] = $import_id;
3714 $wpdb->insert( $wpdb->posts, $data );
3715 $post_ID = (int) $wpdb->insert_id;
3718 if ( empty($post_name) ) {
3719 $post_name = sanitize_title($post_title, $post_ID);
3720 $wpdb->update( $wpdb->posts, compact("post_name"), array( 'ID' => $post_ID ) );
3723 wp_set_post_categories($post_ID, $post_category);
3726 update_attached_file( $post_ID, $file );
3728 clean_post_cache($post_ID);
3730 if ( isset($post_parent) && $post_parent < 0 )
3731 add_post_meta($post_ID, '_wp_attachment_temp_parent', $post_parent, true);
3733 if ( ! empty( $context ) )
3734 add_post_meta( $post_ID, '_wp_attachment_context', $context, true );
3737 do_action('edit_attachment', $post_ID);
3739 do_action('add_attachment', $post_ID);
3746 * Trashes or deletes an attachment.
3748 * When an attachment is permanently deleted, the file will also be removed.
3749 * Deletion removes all post meta fields, taxonomy, comments, etc. associated
3750 * with the attachment (except the main post).
3752 * The attachment is moved to the trash instead of permanently deleted unless trash
3753 * for media is disabled, item is already in the trash, or $force_delete is true.
3757 * @uses do_action() Calls 'delete_attachment' hook on Attachment ID.
3759 * @param int $post_id Attachment ID.
3760 * @param bool $force_delete Whether to bypass trash and force deletion. Defaults to false.
3761 * @return mixed False on failure. Post data on success.
3763 function wp_delete_attachment( $post_id, $force_delete = false ) {
3766 if ( !$post = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id) ) )
3769 if ( 'attachment' != $post->post_type )
3772 if ( !$force_delete && EMPTY_TRASH_DAYS && MEDIA_TRASH && 'trash' != $post->post_status )
3773 return wp_trash_post( $post_id );
3775 delete_post_meta($post_id, '_wp_trash_meta_status');
3776 delete_post_meta($post_id, '_wp_trash_meta_time');
3778 $meta = wp_get_attachment_metadata( $post_id );
3779 $backup_sizes = get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true );
3780 $file = get_attached_file( $post_id );
3782 if ( is_multisite() )
3783 delete_transient( 'dirsize_cache' );
3785 do_action('delete_attachment', $post_id);
3787 wp_delete_object_term_relationships($post_id, array('category', 'post_tag'));
3788 wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type));
3790 $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE meta_key = '_thumbnail_id' AND meta_value = %d", $post_id ));
3792 $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ));
3793 if ( ! empty( $comment_ids ) ) {
3794 do_action( 'delete_comment', $comment_ids );
3795 foreach ( $comment_ids as $comment_id )
3796 wp_delete_comment( $comment_id, true );
3797 do_action( 'deleted_comment', $comment_ids );
3800 $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id ));
3801 if ( !empty($post_meta_ids) ) {
3802 do_action( 'delete_postmeta', $post_meta_ids );
3803 $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'";
3804 $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" );
3805 do_action( 'deleted_postmeta', $post_meta_ids );
3808 do_action( 'delete_post', $post_id );
3809 $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $post_id ));
3810 do_action( 'deleted_post', $post_id );
3812 $uploadpath = wp_upload_dir();
3814 if ( ! empty($meta['thumb']) ) {
3815 // Don't delete the thumb if another attachment uses it
3816 if (! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $meta['thumb'] . '%', $post_id)) ) {
3817 $thumbfile = str_replace(basename($file), $meta['thumb'], $file);
3818 $thumbfile = apply_filters('wp_delete_file', $thumbfile);
3819 @ unlink( path_join($uploadpath['basedir'], $thumbfile) );
3823 // remove intermediate and backup images if there are any
3824 foreach ( get_intermediate_image_sizes() as $size ) {
3825 if ( $intermediate = image_get_intermediate_size($post_id, $size) ) {
3826 $intermediate_file = apply_filters('wp_delete_file', $intermediate['path']);
3827 @ unlink( path_join($uploadpath['basedir'], $intermediate_file) );
3831 if ( is_array($backup_sizes) ) {
3832 foreach ( $backup_sizes as $size ) {
3833 $del_file = path_join( dirname($meta['file']), $size['file'] );
3834 $del_file = apply_filters('wp_delete_file', $del_file);
3835 @ unlink( path_join($uploadpath['basedir'], $del_file) );
3839 $file = apply_filters('wp_delete_file', $file);
3841 if ( ! empty($file) )
3844 clean_post_cache($post_id);
3850 * Retrieve attachment meta field for attachment ID.
3854 * @param int $post_id Attachment ID
3855 * @param bool $unfiltered Optional, default is false. If true, filters are not run.
3856 * @return string|bool Attachment meta field. False on failure.
3858 function wp_get_attachment_metadata( $post_id = 0, $unfiltered = false ) {
3859 $post_id = (int) $post_id;
3860 if ( !$post =& get_post( $post_id ) )
3863 $data = get_post_meta( $post->ID, '_wp_attachment_metadata', true );
3868 return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID );
3872 * Update metadata for an attachment.
3876 * @param int $post_id Attachment ID.
3877 * @param array $data Attachment data.
3880 function wp_update_attachment_metadata( $post_id, $data ) {
3881 $post_id = (int) $post_id;
3882 if ( !$post =& get_post( $post_id ) )
3885 $data = apply_filters( 'wp_update_attachment_metadata', $data, $post->ID );
3887 return update_post_meta( $post->ID, '_wp_attachment_metadata', $data);
3891 * Retrieve the URL for an attachment.
3895 * @param int $post_id Attachment ID.
3898 function wp_get_attachment_url( $post_id = 0 ) {
3899 $post_id = (int) $post_id;
3900 if ( !$post =& get_post( $post_id ) )
3904 if ( $file = get_post_meta( $post->ID, '_wp_attached_file', true) ) { //Get attached file
3905 if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { //Get upload directory
3906 if ( 0 === strpos($file, $uploads['basedir']) ) //Check that the upload base exists in the file location
3907 $url = str_replace($uploads['basedir'], $uploads['baseurl'], $file); //replace file location with url location
3908 elseif ( false !== strpos($file, 'wp-content/uploads') )
3909 $url = $uploads['baseurl'] . substr( $file, strpos($file, 'wp-content/uploads') + 18 );
3911 $url = $uploads['baseurl'] . "/$file"; //Its a newly uploaded file, therefor $file is relative to the basedir.
3915 if ( empty($url) ) //If any of the above options failed, Fallback on the GUID as used pre-2.7, not recomended to rely upon this.
3916 $url = get_the_guid( $post->ID );
3918 $url = apply_filters( 'wp_get_attachment_url', $url, $post->ID );
3920 if ( 'attachment' != $post->post_type || empty( $url ) )
3927 * Retrieve thumbnail for an attachment.
3931 * @param int $post_id Attachment ID.
3932 * @return mixed False on failure. Thumbnail file path on success.
3934 function wp_get_attachment_thumb_file( $post_id = 0 ) {
3935 $post_id = (int) $post_id;
3936 if ( !$post =& get_post( $post_id ) )
3938 if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) )
3941 $file = get_attached_file( $post->ID );
3943 if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) )
3944 return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID );
3949 * Retrieve URL for an attachment thumbnail.
3953 * @param int $post_id Attachment ID
3954 * @return string|bool False on failure. Thumbnail URL on success.
3956 function wp_get_attachment_thumb_url( $post_id = 0 ) {
3957 $post_id = (int) $post_id;
3958 if ( !$post =& get_post( $post_id ) )
3960 if ( !$url = wp_get_attachment_url( $post->ID ) )
3963 $sized = image_downsize( $post_id, 'thumbnail' );
3967 if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
3970 $url = str_replace(basename($url), basename($thumb), $url);
3972 return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
3976 * Check if the attachment is an image.
3980 * @param int $post_id Attachment ID
3983 function wp_attachment_is_image( $post_id = 0 ) {
3984 $post_id = (int) $post_id;
3985 if ( !$post =& get_post( $post_id ) )
3988 if ( !$file = get_attached_file( $post->ID ) )
3991 $ext = preg_match('/\.([^.]+)$/', $file, $matches) ? strtolower($matches[1]) : false;
3993 $image_exts = array('jpg', 'jpeg', 'gif', 'png');
3995 if ( 'image/' == substr($post->post_mime_type, 0, 6) || $ext && 'import' == $post->post_mime_type && in_array($ext, $image_exts) )
4001 * Retrieve the icon for a MIME type.
4005 * @param string $mime MIME type
4006 * @return string|bool
4008 function wp_mime_type_icon( $mime = 0 ) {
4009 if ( !is_numeric($mime) )
4010 $icon = wp_cache_get("mime_type_icon_$mime");
4011 if ( empty($icon) ) {
4013 $post_mimes = array();
4014 if ( is_numeric($mime) ) {
4015 $mime = (int) $mime;
4016 if ( $post =& get_post( $mime ) ) {
4017 $post_id = (int) $post->ID;
4018 $ext = preg_replace('/^.+?\.([^.]+)$/', '$1', $post->guid);
4019 if ( !empty($ext) ) {
4020 $post_mimes[] = $ext;
4021 if ( $ext_type = wp_ext2type( $ext ) )
4022 $post_mimes[] = $ext_type;
4024 $mime = $post->post_mime_type;
4029 $post_mimes[] = $mime;
4032 $icon_files = wp_cache_get('icon_files');
4034 if ( !is_array($icon_files) ) {
4035 $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
4036 $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url('images/crystal') );
4037 $dirs = apply_filters( 'icon_dirs', array($icon_dir => $icon_dir_uri) );
4038 $icon_files = array();
4040 $dir = array_shift($keys = array_keys($dirs));
4041 $uri = array_shift($dirs);
4042 if ( $dh = opendir($dir) ) {
4043 while ( false !== $file = readdir($dh) ) {
4044 $file = basename($file);
4045 if ( substr($file, 0, 1) == '.' )
4047 if ( !in_array(strtolower(substr($file, -4)), array('.png', '.gif', '.jpg') ) ) {
4048 if ( is_dir("$dir/$file") )
4049 $dirs["$dir/$file"] = "$uri/$file";
4052 $icon_files["$dir/$file"] = "$uri/$file";
4057 wp_cache_set('icon_files', $icon_files, 600);
4060 // Icon basename - extension = MIME wildcard
4061 foreach ( $icon_files as $file => $uri )
4062 $types[ preg_replace('/^([^.]*).*$/', '$1', basename($file)) ] =& $icon_files[$file];
4064 if ( ! empty($mime) ) {
4065 $post_mimes[] = substr($mime, 0, strpos($mime, '/'));
4066 $post_mimes[] = substr($mime, strpos($mime, '/') + 1);
4067 $post_mimes[] = str_replace('/', '_', $mime);
4070 $matches = wp_match_mime_types(array_keys($types), $post_mimes);
4071 $matches['default'] = array('default');
4073 foreach ( $matches as $match => $wilds ) {
4074 if ( isset($types[$wilds[0]])) {
4075 $icon = $types[$wilds[0]];
4076 if ( !is_numeric($mime) )
4077 wp_cache_set("mime_type_icon_$mime", $icon);
4083 return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id ); // Last arg is 0 if function pass mime type.
4087 * Checked for changed slugs for published post objects and save the old slug.
4089 * The function is used when a post object of any type is updated,
4090 * by comparing the current and previous post objects.
4092 * If the slug was changed and not already part of the old slugs then it will be
4093 * added to the post meta field ('_wp_old_slug') for storing old slugs for that
4096 * The most logically usage of this function is redirecting changed post objects, so
4097 * that those that linked to an changed post will be redirected to the new post.
4101 * @param int $post_id Post ID.
4102 * @param object $post The Post Object
4103 * @param object $post_before The Previous Post Object
4104 * @return int Same as $post_id
4106 function wp_check_for_changed_slugs($post_id, $post, $post_before) {
4107 // dont bother if it hasnt changed
4108 if ( $post->post_name == $post_before->post_name )
4111 // we're only concerned with published, non-hierarchical objects
4112 if ( $post->post_status != 'publish' || is_post_type_hierarchical( $post->post_type ) )
4115 $old_slugs = (array) get_post_meta($post_id, '_wp_old_slug');
4117 // if we haven't added this old slug before, add it now
4118 if ( !empty( $post_before->post_name ) && !in_array($post_before->post_name, $old_slugs) )
4119 add_post_meta($post_id, '_wp_old_slug', $post_before->post_name);
4121 // if the new slug was used previously, delete it from the list
4122 if ( in_array($post->post_name, $old_slugs) )
4123 delete_post_meta($post_id, '_wp_old_slug', $post->post_name);
4127 * Retrieve the private post SQL based on capability.
4129 * This function provides a standardized way to appropriately select on the
4130 * post_status of a post type. The function will return a piece of SQL code
4131 * that can be added to a WHERE clause; this SQL is constructed to allow all
4132 * published posts, and all private posts to which the user has access.
4138 * @param string $post_type currently only supports 'post' or 'page'.
4139 * @return string SQL code that can be added to a where clause.
4141 function get_private_posts_cap_sql( $post_type ) {
4142 return get_posts_by_author_sql( $post_type, false );
4146 * Retrieve the post SQL based on capability, author, and type.
4148 * @see get_private_posts_cap_sql() for full description.
4151 * @param string $post_type Post type.
4152 * @param bool $full Optional. Returns a full WHERE statement instead of just an 'andalso' term.
4153 * @param int $post_author Optional. Query posts having a single author ID.
4154 * @return string SQL WHERE code that can be added to a query.
4156 function get_posts_by_author_sql( $post_type, $full = true, $post_author = null ) {
4157 global $user_ID, $wpdb;
4160 $post_type_obj = get_post_type_object( $post_type );
4161 if ( ! $post_type_obj )
4164 // This hook is deprecated. Why you'd want to use it, I dunno.
4165 if ( ! $cap = apply_filters( 'pub_priv_sql_capability', '' ) )
4166 $cap = $post_type_obj->cap->read_private_posts;
4169 if ( null === $post_author ) {
4170 $sql = $wpdb->prepare( 'WHERE post_type = %s AND ', $post_type );
4172 $sql = $wpdb->prepare( 'WHERE post_author = %d AND post_type = %s AND ', $post_author, $post_type );
4178 $sql .= "(post_status = 'publish'";
4180 if ( current_user_can( $cap ) ) {
4181 // Does the user have the capability to view private posts? Guess so.
4182 $sql .= " OR post_status = 'private'";
4183 } elseif ( is_user_logged_in() ) {
4184 // Users can view their own private posts.
4185 $id = (int) $user_ID;
4186 if ( null === $post_author || ! $full ) {
4187 $sql .= " OR post_status = 'private' AND post_author = $id";
4188 } elseif ( $id == (int) $post_author ) {
4189 $sql .= " OR post_status = 'private'";
4199 * Retrieve the date that the last post was published.
4201 * The server timezone is the default and is the difference between GMT and
4202 * server time. The 'blog' value is the date when the last post was posted. The
4203 * 'gmt' is when the last post was posted in GMT formatted date.
4207 * @uses apply_filters() Calls 'get_lastpostdate' filter
4209 * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
4210 * @return string The date of the last post.
4212 function get_lastpostdate($timezone = 'server') {
4213 return apply_filters( 'get_lastpostdate', _get_last_post_time( $timezone, 'date' ), $timezone );
4217 * Retrieve last post modified date depending on timezone.
4219 * The server timezone is the default and is the difference between GMT and
4220 * server time. The 'blog' value is just when the last post was modified. The
4221 * 'gmt' is when the last post was modified in GMT time.
4224 * @uses apply_filters() Calls 'get_lastpostmodified' filter
4226 * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
4227 * @return string The date the post was last modified.
4229 function get_lastpostmodified($timezone = 'server') {
4230 $lastpostmodified = _get_last_post_time( $timezone, 'modified' );
4232 $lastpostdate = get_lastpostdate($timezone);
4233 if ( $lastpostdate > $lastpostmodified )
4234 $lastpostmodified = $lastpostdate;
4236 return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
4240 * Retrieve latest post date data based on timezone.
4245 * @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
4246 * @param string $field Field to check. Can be 'date' or 'modified'.
4247 * @return string The date.
4249 function _get_last_post_time( $timezone, $field ) {
4252 if ( !in_array( $field, array( 'date', 'modified' ) ) )
4255 $timezone = strtolower( $timezone );
4257 $key = "lastpost{$field}:$timezone";
4259 $date = wp_cache_get( $key, 'timeinfo' );
4262 $add_seconds_server = date('Z');
4264 $post_types = get_post_types( array( 'public' => true ) );
4265 array_walk( $post_types, array( &$wpdb, 'escape_by_ref' ) );
4266 $post_types = "'" . implode( "', '", $post_types ) . "'";
4268 switch ( $timezone ) {
4270 $date = $wpdb->get_var("SELECT post_{$field}_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
4273 $date = $wpdb->get_var("SELECT post_{$field} FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
4276 $date = $wpdb->get_var("SELECT DATE_ADD(post_{$field}_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1");
4281 wp_cache_set( $key, $date, 'timeinfo' );
4288 * Updates posts in cache.
4290 * @usedby update_page_cache() Aliased by this function.
4292 * @package WordPress
4296 * @param array $posts Array of post objects
4298 function update_post_cache(&$posts) {
4302 foreach ( $posts as $post )
4303 wp_cache_add($post->ID, $post, 'posts');
4307 * Will clean the post in the cache.
4309 * Cleaning means delete from the cache of the post. Will call to clean the term
4310 * object cache associated with the post ID.
4312 * clean_post_cache() will call itself recursively for each child post.
4314 * This function not run if $_wp_suspend_cache_invalidation is not empty. See
4315 * wp_suspend_cache_invalidation().
4317 * @package WordPress
4321 * @uses do_action() Calls 'clean_post_cache' on $id before adding children (if any).
4323 * @param int $id The Post ID in the cache to clean
4325 function clean_post_cache($id) {
4326 global $_wp_suspend_cache_invalidation, $wpdb;
4328 if ( !empty($_wp_suspend_cache_invalidation) )
4336 wp_cache_delete($id, 'posts');
4337 wp_cache_delete($id, 'post_meta');
4339 clean_object_term_cache($id, 'post');
4341 wp_cache_delete( 'wp_get_archives', 'general' );
4343 do_action('clean_post_cache', $id);
4345 if ( $children = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_parent = %d", $id) ) ) {
4346 foreach ( $children as $cid ) {
4350 clean_post_cache( $cid );
4354 if ( is_multisite() )
4355 wp_cache_delete( $wpdb->blogid . '-' . $id, 'global-posts' );
4359 * Alias of update_post_cache().
4361 * @see update_post_cache() Posts and pages are the same, alias is intentional
4363 * @package WordPress
4367 * @param array $pages list of page objects
4369 function update_page_cache(&$pages) {
4370 update_post_cache($pages);
4374 * Will clean the page in the cache.
4376 * Clean (read: delete) page from cache that matches $id. Will also clean cache
4377 * associated with 'all_page_ids' and 'get_pages'.
4379 * @package WordPress
4383 * @uses do_action() Will call the 'clean_page_cache' hook action.
4385 * @param int $id Page ID to clean
4387 function clean_page_cache($id) {
4388 clean_post_cache($id);
4390 wp_cache_delete( 'all_page_ids', 'posts' );
4391 wp_cache_delete( 'get_pages', 'posts' );
4393 do_action('clean_page_cache', $id);
4397 * Call major cache updating functions for list of Post objects.
4399 * @package WordPress
4404 * @uses update_post_cache()
4405 * @uses update_object_term_cache()
4406 * @uses update_postmeta_cache()
4408 * @param array $posts Array of Post objects
4409 * @param string $post_type The post type of the posts in $posts. Default is 'post'.
4410 * @param bool $update_term_cache Whether to update the term cache. Default is true.
4411 * @param bool $update_meta_cache Whether to update the meta cache. Default is true.
4413 function update_post_caches(&$posts, $post_type = 'post', $update_term_cache = true, $update_meta_cache = true) {
4414 // No point in doing all this work if we didn't match any posts.
4418 update_post_cache($posts);
4420 $post_ids = array();
4421 foreach ( $posts as $post )
4422 $post_ids[] = $post->ID;
4424 if ( empty($post_type) )
4425 $post_type = 'post';
4427 if ( $update_term_cache ) {
4428 if ( is_array($post_type) ) {
4429 $ptypes = $post_type;
4430 } elseif ( 'any' == $post_type ) {
4431 // Just use the post_types in the supplied posts.
4432 foreach ( $posts as $post )
4433 $ptypes[] = $post->post_type;
4434 $ptypes = array_unique($ptypes);
4436 $ptypes = array($post_type);
4439 if ( ! empty($ptypes) )
4440 update_object_term_cache($post_ids, $ptypes);
4443 if ( $update_meta_cache )
4444 update_postmeta_cache($post_ids);
4448 * Updates metadata cache for list of post IDs.
4450 * Performs SQL query to retrieve the metadata for the post IDs and updates the
4451 * metadata cache for the posts. Therefore, the functions, which call this
4452 * function, do not need to perform SQL queries on their own.
4454 * @package WordPress
4460 * @param array $post_ids List of post IDs.
4461 * @return bool|array Returns false if there is nothing to update or an array of metadata.
4463 function update_postmeta_cache($post_ids) {
4464 return update_meta_cache('post', $post_ids);
4468 * Will clean the attachment in the cache.
4470 * Cleaning means delete from the cache. Optionaly will clean the term
4471 * object cache associated with the attachment ID.
4473 * This function will not run if $_wp_suspend_cache_invalidation is not empty. See
4474 * wp_suspend_cache_invalidation().
4476 * @package WordPress
4480 * @uses do_action() Calls 'clean_attachment_cache' on $id.
4482 * @param int $id The attachment ID in the cache to clean
4483 * @param bool $clean_terms optional. Whether to clean terms cache
4485 function clean_attachment_cache($id, $clean_terms = false) {
4486 global $_wp_suspend_cache_invalidation;
4488 if ( !empty($_wp_suspend_cache_invalidation) )
4493 wp_cache_delete($id, 'posts');
4494 wp_cache_delete($id, 'post_meta');
4497 clean_object_term_cache($id, 'attachment');
4499 do_action('clean_attachment_cache', $id);
4507 * Hook for managing future post transitions to published.
4512 * @uses do_action() Calls 'private_to_published' on post ID if this is a 'private_to_published' call.
4513 * @uses wp_clear_scheduled_hook() with 'publish_future_post' and post ID.
4515 * @param string $new_status New post status
4516 * @param string $old_status Previous post status
4517 * @param object $post Object type containing the post information
4519 function _transition_post_status($new_status, $old_status, $post) {
4522 if ( $old_status != 'publish' && $new_status == 'publish' ) {
4523 // Reset GUID if transitioning to publish and it is empty
4524 if ( '' == get_the_guid($post->ID) )
4525 $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
4526 do_action('private_to_published', $post->ID); // Deprecated, use private_to_publish
4529 // If published posts changed clear the lastpostmodified cache
4530 if ( 'publish' == $new_status || 'publish' == $old_status) {
4531 foreach ( array( 'server', 'gmt', 'blog' ) as $timezone ) {
4532 wp_cache_delete( "lastpostmodified:$timezone", 'timeinfo' );
4533 wp_cache_delete( "lastpostdate:$timezone", 'timeinfo' );
4537 // Always clears the hook in case the post status bounced from future to draft.
4538 wp_clear_scheduled_hook('publish_future_post', array( $post->ID ) );
4542 * Hook used to schedule publication for a post marked for the future.
4544 * The $post properties used and must exist are 'ID' and 'post_date_gmt'.
4549 * @param int $deprecated Not used. Can be set to null. Never implemented.
4550 * Not marked as deprecated with _deprecated_argument() as it conflicts with
4551 * wp_transition_post_status() and the default filter for _future_post_hook().
4552 * @param object $post Object type containing the post information
4554 function _future_post_hook( $deprecated = '', $post ) {
4555 wp_clear_scheduled_hook( 'publish_future_post', array( $post->ID ) );
4556 wp_schedule_single_event( strtotime( get_gmt_from_date( $post->post_date ) . ' GMT') , 'publish_future_post', array( $post->ID ) );
4560 * Hook to schedule pings and enclosures when a post is published.
4565 * @uses XMLRPC_REQUEST and APP_REQUEST constants.
4566 * @uses do_action() Calls 'xmlprc_publish_post' on post ID if XMLRPC_REQUEST is defined.
4567 * @uses do_action() Calls 'app_publish_post' on post ID if APP_REQUEST is defined.
4569 * @param int $post_id The ID in the database table of the post being published
4571 function _publish_post_hook($post_id) {
4574 if ( defined('XMLRPC_REQUEST') )
4575 do_action('xmlrpc_publish_post', $post_id);
4576 if ( defined('APP_REQUEST') )
4577 do_action('app_publish_post', $post_id);
4579 if ( defined('WP_IMPORTING') )
4582 $data = array( 'post_id' => $post_id, 'meta_value' => '1' );
4583 if ( get_option('default_pingback_flag') ) {
4584 $wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_pingme' ) );
4585 do_action( 'added_postmeta', $wpdb->insert_id, $post_id, '_pingme', 1 );
4587 $wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_encloseme' ) );
4588 do_action( 'added_postmeta', $wpdb->insert_id, $post_id, '_encloseme', 1 );
4590 wp_schedule_single_event(time(), 'do_pings');
4594 * Hook used to prevent page/post cache and rewrite rules from staying dirty.
4596 * Does two things. If the post is a page and has a template then it will
4597 * update/add that template to the meta. For both pages and posts, it will clean
4598 * the post cache to make sure that the cache updates to the changes done
4599 * recently. For pages, the rewrite rules of WordPress are flushed to allow for
4602 * The $post parameter, only uses 'post_type' property and 'page_template'
4607 * @uses $wp_rewrite Flushes Rewrite Rules.
4609 * @param int $post_id The ID in the database table for the $post
4610 * @param object $post Object type containing the post information
4612 function _save_post_hook($post_id, $post) {
4613 if ( $post->post_type == 'page' ) {
4614 clean_page_cache($post_id);
4615 // Avoid flushing rules for every post during import.
4616 if ( !defined('WP_IMPORTING') ) {
4618 $wp_rewrite->flush_rules(false);
4621 clean_post_cache($post_id);
4626 * Retrieve post ancestors and append to post ancestors property.
4628 * Will only retrieve ancestors once, if property is already set, then nothing
4629 * will be done. If there is not a parent post, or post ID and post parent ID
4630 * are the same then nothing will be done.
4632 * The parameter is passed by reference, so nothing needs to be returned. The
4633 * property will be updated and can be referenced after the function is
4634 * complete. The post parent will be an ancestor and the parent of the post
4635 * parent will be an ancestor. There will only be two ancestors at the most.
4641 * @param object $_post Post data.
4642 * @return null When nothing needs to be done.
4644 function _get_post_ancestors(&$_post) {
4647 if ( isset($_post->ancestors) )
4650 $_post->ancestors = array();
4652 if ( empty($_post->post_parent) || $_post->ID == $_post->post_parent )
4655 $id = $_post->ancestors[] = $_post->post_parent;
4656 while ( $ancestor = $wpdb->get_var( $wpdb->prepare("SELECT `post_parent` FROM $wpdb->posts WHERE ID = %d LIMIT 1", $id) ) ) {
4657 // Loop detection: If the ancestor has been seen before, break.
4658 if ( ( $ancestor == $_post->ID ) || in_array($ancestor, $_post->ancestors) )
4660 $id = $_post->ancestors[] = $ancestor;
4665 * Determines which fields of posts are to be saved in revisions.
4667 * Does two things. If passed a post *array*, it will return a post array ready
4668 * to be insterted into the posts table as a post revision. Otherwise, returns
4669 * an array whose keys are the post fields to be saved for post revisions.
4671 * @package WordPress
4672 * @subpackage Post_Revisions
4675 * @uses apply_filters() Calls '_wp_post_revision_fields' on 'title', 'content' and 'excerpt' fields.
4677 * @param array $post Optional a post array to be processed for insertion as a post revision.
4678 * @param bool $autosave optional Is the revision an autosave?
4679 * @return array Post array ready to be inserted as a post revision or array of fields that can be versioned.
4681 function _wp_post_revision_fields( $post = null, $autosave = false ) {
4682 static $fields = false;
4685 // Allow these to be versioned
4687 'post_title' => __( 'Title' ),
4688 'post_content' => __( 'Content' ),
4689 'post_excerpt' => __( 'Excerpt' ),
4693 $fields = apply_filters( '_wp_post_revision_fields', $fields );
4695 // WP uses these internally either in versioning or elsewhere - they cannot be versioned
4696 foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect )
4697 unset( $fields[$protect] );
4700 if ( !is_array($post) )
4704 foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field )
4705 $return[$field] = $post[$field];
4707 $return['post_parent'] = $post['ID'];
4708 $return['post_status'] = 'inherit';
4709 $return['post_type'] = 'revision';
4710 $return['post_name'] = $autosave ? "$post[ID]-autosave" : "$post[ID]-revision";
4711 $return['post_date'] = isset($post['post_modified']) ? $post['post_modified'] : '';
4712 $return['post_date_gmt'] = isset($post['post_modified_gmt']) ? $post['post_modified_gmt'] : '';
4718 * Saves an already existing post as a post revision.
4720 * Typically used immediately prior to post updates.
4722 * @package WordPress
4723 * @subpackage Post_Revisions
4726 * @uses _wp_put_post_revision()
4728 * @param int $post_id The ID of the post to save as a revision.
4729 * @return mixed Null or 0 if error, new revision ID, if success.
4731 function wp_save_post_revision( $post_id ) {
4732 // We do autosaves manually with wp_create_post_autosave()
4733 if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
4736 // WP_POST_REVISIONS = 0, false
4737 if ( ! WP_POST_REVISIONS )
4740 if ( !$post = get_post( $post_id, ARRAY_A ) )
4743 if ( !post_type_supports($post['post_type'], 'revisions') )
4746 $return = _wp_put_post_revision( $post );
4748 // WP_POST_REVISIONS = true (default), -1
4749 if ( !is_numeric( WP_POST_REVISIONS ) || WP_POST_REVISIONS < 0 )
4752 // all revisions and (possibly) one autosave
4753 $revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) );
4755 // WP_POST_REVISIONS = (int) (# of autosaves to save)
4756 $delete = count($revisions) - WP_POST_REVISIONS;
4761 $revisions = array_slice( $revisions, 0, $delete );
4763 for ( $i = 0; isset($revisions[$i]); $i++ ) {
4764 if ( false !== strpos( $revisions[$i]->post_name, 'autosave' ) )
4766 wp_delete_post_revision( $revisions[$i]->ID );
4773 * Retrieve the autosaved data of the specified post.
4775 * Returns a post object containing the information that was autosaved for the
4778 * @package WordPress
4779 * @subpackage Post_Revisions
4782 * @param int $post_id The post ID.
4783 * @return object|bool The autosaved data or false on failure or when no autosave exists.
4785 function wp_get_post_autosave( $post_id ) {
4787 if ( !$post = get_post( $post_id ) )
4791 'name' => "{$post->ID}-autosave",
4792 'post_parent' => $post->ID,
4793 'post_type' => 'revision',
4794 'post_status' => 'inherit'
4797 // Use WP_Query so that the result gets cached
4798 $autosave_query = new WP_Query;
4800 add_action( 'parse_query', '_wp_get_post_autosave_hack' );
4801 $autosave = $autosave_query->query( $q );
4802 remove_action( 'parse_query', '_wp_get_post_autosave_hack' );
4804 if ( $autosave && is_array($autosave) && is_object($autosave[0]) )
4805 return $autosave[0];
4811 * Internally used to hack WP_Query into submission.
4813 * @package WordPress
4814 * @subpackage Post_Revisions
4817 * @param object $query WP_Query object
4819 function _wp_get_post_autosave_hack( $query ) {
4820 $query->is_single = false;
4824 * Determines if the specified post is a revision.
4826 * @package WordPress
4827 * @subpackage Post_Revisions
4830 * @param int|object $post Post ID or post object.
4831 * @return bool|int False if not a revision, ID of revision's parent otherwise.
4833 function wp_is_post_revision( $post ) {
4834 if ( !$post = wp_get_post_revision( $post ) )
4836 return (int) $post->post_parent;
4840 * Determines if the specified post is an autosave.
4842 * @package WordPress
4843 * @subpackage Post_Revisions
4846 * @param int|object $post Post ID or post object.
4847 * @return bool|int False if not a revision, ID of autosave's parent otherwise
4849 function wp_is_post_autosave( $post ) {
4850 if ( !$post = wp_get_post_revision( $post ) )
4852 if ( "{$post->post_parent}-autosave" !== $post->post_name )
4854 return (int) $post->post_parent;
4858 * Inserts post data into the posts table as a post revision.
4860 * @package WordPress
4861 * @subpackage Post_Revisions
4864 * @uses wp_insert_post()
4866 * @param int|object|array $post Post ID, post object OR post array.
4867 * @param bool $autosave Optional. Is the revision an autosave?
4868 * @return mixed Null or 0 if error, new revision ID if success.
4870 function _wp_put_post_revision( $post = null, $autosave = false ) {
4871 if ( is_object($post) )
4872 $post = get_object_vars( $post );
4873 elseif ( !is_array($post) )
4874 $post = get_post($post, ARRAY_A);
4875 if ( !$post || empty($post['ID']) )
4878 if ( isset($post['post_type']) && 'revision' == $post['post_type'] )
4879 return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
4881 $post = _wp_post_revision_fields( $post, $autosave );
4882 $post = add_magic_quotes($post); //since data is from db
4884 $revision_id = wp_insert_post( $post );
4885 if ( is_wp_error($revision_id) )
4886 return $revision_id;
4889 do_action( '_wp_put_post_revision', $revision_id );
4890 return $revision_id;
4894 * Gets a post revision.
4896 * @package WordPress
4897 * @subpackage Post_Revisions
4902 * @param int|object $post Post ID or post object
4903 * @param string $output Optional. OBJECT, ARRAY_A, or ARRAY_N.
4904 * @param string $filter Optional sanitation filter. @see sanitize_post()
4905 * @return mixed Null if error or post object if success
4907 function &wp_get_post_revision(&$post, $output = OBJECT, $filter = 'raw') {
4909 if ( !$revision = get_post( $post, OBJECT, $filter ) )
4911 if ( 'revision' !== $revision->post_type )
4914 if ( $output == OBJECT ) {
4916 } elseif ( $output == ARRAY_A ) {
4917 $_revision = get_object_vars($revision);
4919 } elseif ( $output == ARRAY_N ) {
4920 $_revision = array_values(get_object_vars($revision));
4928 * Restores a post to the specified revision.
4930 * Can restore a past revision using all fields of the post revision, or only selected fields.
4932 * @package WordPress
4933 * @subpackage Post_Revisions
4936 * @uses wp_get_post_revision()
4937 * @uses wp_update_post()
4938 * @uses do_action() Calls 'wp_restore_post_revision' on post ID and revision ID if wp_update_post()
4941 * @param int|object $revision_id Revision ID or revision object.
4942 * @param array $fields Optional. What fields to restore from. Defaults to all.
4943 * @return mixed Null if error, false if no fields to restore, (int) post ID if success.
4945 function wp_restore_post_revision( $revision_id, $fields = null ) {
4946 if ( !$revision = wp_get_post_revision( $revision_id, ARRAY_A ) )
4949 if ( !is_array( $fields ) )
4950 $fields = array_keys( _wp_post_revision_fields() );
4953 foreach( array_intersect( array_keys( $revision ), $fields ) as $field )
4954 $update[$field] = $revision[$field];
4959 $update['ID'] = $revision['post_parent'];
4961 $update = add_magic_quotes( $update ); //since data is from db
4963 $post_id = wp_update_post( $update );
4964 if ( is_wp_error( $post_id ) )
4968 do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] );
4974 * Deletes a revision.
4976 * Deletes the row from the posts table corresponding to the specified revision.
4978 * @package WordPress
4979 * @subpackage Post_Revisions
4982 * @uses wp_get_post_revision()
4983 * @uses wp_delete_post()
4985 * @param int|object $revision_id Revision ID or revision object.
4986 * @return mixed Null or WP_Error if error, deleted post if success.
4988 function wp_delete_post_revision( $revision_id ) {
4989 if ( !$revision = wp_get_post_revision( $revision_id ) )
4992 $delete = wp_delete_post( $revision->ID );
4993 if ( is_wp_error( $delete ) )
4997 do_action( 'wp_delete_post_revision', $revision->ID, $revision );
5003 * Returns all revisions of specified post.
5005 * @package WordPress
5006 * @subpackage Post_Revisions
5009 * @uses get_children()
5011 * @param int|object $post_id Post ID or post object
5012 * @return array empty if no revisions
5014 function wp_get_post_revisions( $post_id = 0, $args = null ) {
5015 if ( ! WP_POST_REVISIONS )
5017 if ( ( !$post = get_post( $post_id ) ) || empty( $post->ID ) )
5020 $defaults = array( 'order' => 'DESC', 'orderby' => 'date' );
5021 $args = wp_parse_args( $args, $defaults );
5022 $args = array_merge( $args, array( 'post_parent' => $post->ID, 'post_type' => 'revision', 'post_status' => 'inherit' ) );
5024 if ( !$revisions = get_children( $args ) )
5029 function _set_preview($post) {
5031 if ( ! is_object($post) )
5034 $preview = wp_get_post_autosave($post->ID);
5036 if ( ! is_object($preview) )
5039 $preview = sanitize_post($preview);
5041 $post->post_content = $preview->post_content;
5042 $post->post_title = $preview->post_title;
5043 $post->post_excerpt = $preview->post_excerpt;
5048 function _show_post_preview() {
5050 if ( isset($_GET['preview_id']) && isset($_GET['preview_nonce']) ) {
5051 $id = (int) $_GET['preview_id'];
5053 if ( false == wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . $id ) )
5054 wp_die( __('You do not have permission to preview drafts.') );
5056 add_filter('the_preview', '_set_preview');
5061 * Returns the post's parent's post_ID
5065 * @param int $post_id
5067 * @return int|bool false on error
5069 function wp_get_post_parent_id( $post_ID ) {
5070 $post = get_post( $post_ID );
5071 if ( !$post || is_wp_error( $post ) )
5073 return (int) $post->post_parent;
5077 * Checks the given subset of the post hierarchy for hierarchy loops.
5078 * Prevents loops from forming and breaks those that it finds.
5080 * Attached to the wp_insert_post_parent filter.
5083 * @uses wp_find_hierarchy_loop()
5085 * @param int $post_parent ID of the parent for the post we're checking.
5086 * @parem int $post_ID ID of the post we're checking.
5088 * @return int The new post_parent for the post.
5090 function wp_check_post_hierarchy_for_loops( $post_parent, $post_ID ) {
5091 // Nothing fancy here - bail
5092 if ( !$post_parent )
5095 // New post can't cause a loop
5096 if ( empty( $post_ID ) )
5097 return $post_parent;
5099 // Can't be its own parent
5100 if ( $post_parent == $post_ID )
5103 // Now look for larger loops
5105 if ( !$loop = wp_find_hierarchy_loop( 'wp_get_post_parent_id', $post_ID, $post_parent ) )
5106 return $post_parent; // No loop
5108 // Setting $post_parent to the given value causes a loop
5109 if ( isset( $loop[$post_ID] ) )
5112 // There's a loop, but it doesn't contain $post_ID. Break the loop.
5113 foreach ( array_keys( $loop ) as $loop_member )
5114 wp_update_post( array( 'ID' => $loop_member, 'post_parent' => 0 ) );
5116 return $post_parent;
5120 * Returns an array of post format slugs to their translated and pretty display versions
5124 * @return array The array of translations
5126 function get_post_format_strings() {
5128 'standard' => _x( 'Standard', 'Post format' ), // Special case. any value that evals to false will be considered standard
5129 'aside' => _x( 'Aside', 'Post format' ),
5130 'chat' => _x( 'Chat', 'Post format' ),
5131 'gallery' => _x( 'Gallery', 'Post format' ),
5132 'link' => _x( 'Link', 'Post format' ),
5133 'image' => _x( 'Image', 'Post format' ),
5134 'quote' => _x( 'Quote', 'Post format' ),
5135 'status' => _x( 'Status', 'Post format' ),
5136 'video' => _x( 'Video', 'Post format' ),
5137 'audio' => _x( 'Audio', 'Post format' ),
5143 * Retrieves an array of post format slugs.
5147 * @return array The array of post format slugs.
5149 function get_post_format_slugs() {
5150 $slugs = array_keys( get_post_format_strings() );
5151 return array_combine( $slugs, $slugs );
5155 * Returns a pretty, translated version of a post format slug
5159 * @param string $slug A post format slug
5160 * @return string The translated post format name
5162 function get_post_format_string( $slug ) {
5163 $strings = get_post_format_strings();
5165 return $strings['standard'];
5167 return ( isset( $strings[$slug] ) ) ? $strings[$slug] : '';
5171 * Sets a post thumbnail.
5175 * @param int|object $post Post ID or object where thumbnail should be attached.
5176 * @param int $thumbnail_id Thumbnail to attach.
5177 * @return bool True on success, false on failure.
5179 function set_post_thumbnail( $post, $thumbnail_id ) {
5180 $post = get_post( $post );
5181 $thumbnail_id = absint( $thumbnail_id );
5182 if ( $post && $thumbnail_id && get_post( $thumbnail_id ) ) {
5183 $thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'thumbnail' );
5184 if ( ! empty( $thumbnail_html ) ) {
5185 update_post_meta( $post->ID, '_thumbnail_id', $thumbnail_id );
5193 * Returns a link to a post format index.
5197 * @param $format string Post format
5198 * @return string Link
5200 function get_post_format_link( $format ) {
5201 $term = get_term_by('slug', 'post-format-' . $format, 'post_format' );
5202 if ( ! $term || is_wp_error( $term ) )
5204 return get_term_link( $term );
5208 * Filters the request to allow for the format prefix.
5213 function _post_format_request( $qvs ) {
5214 if ( ! isset( $qvs['post_format'] ) )
5216 $slugs = get_post_format_slugs();
5217 if ( isset( $slugs[ $qvs['post_format'] ] ) )
5218 $qvs['post_format'] = 'post-format-' . $slugs[ $qvs['post_format'] ];
5219 $tax = get_taxonomy( 'post_format' );
5220 $qvs['post_type'] = $tax->object_type;
5223 add_filter( 'request', '_post_format_request' );
5226 * Filters the post format term link to remove the format prefix.
5231 function _post_format_link( $link, $term, $taxonomy ) {
5233 if ( 'post_format' != $taxonomy )
5235 if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) {
5236 return str_replace( "/{$term->slug}", '/' . str_replace( 'post-format-', '', $term->slug ), $link );
5238 $link = remove_query_arg( 'post_format', $link );
5239 return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link );
5242 add_filter( 'term_link', '_post_format_link', 10, 3 );
5245 * Remove the post format prefix from the name property of the term object created by get_term().
5250 function _post_format_get_term( $term ) {
5251 if ( isset( $term->slug ) ) {
5252 $term->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
5256 add_filter( 'get_post_format', '_post_format_get_term' );
5259 * Remove the post format prefix from the name property of the term objects created by get_terms().
5264 function _post_format_get_terms( $terms, $taxonomies, $args ) {
5265 if ( in_array( 'post_format', (array) $taxonomies ) ) {
5266 if ( isset( $args['fields'] ) && 'names' == $args['fields'] ) {
5267 foreach( $terms as $order => $name ) {
5268 $terms[$order] = get_post_format_string( str_replace( 'post-format-', '', $name ) );
5271 foreach ( (array) $terms as $order => $term ) {
5272 if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
5273 $terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
5280 add_filter( 'get_terms', '_post_format_get_terms', 10, 3 );
5283 * Remove the post format prefix from the name property of the term objects created by wp_get_object_terms().
5288 function _post_format_wp_get_object_terms( $terms ) {
5289 foreach ( (array) $terms as $order => $term ) {
5290 if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
5291 $terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
5296 add_filter( 'wp_get_object_terms', '_post_format_wp_get_object_terms' );