mp-wp/wp-includes/post.php [mp-wp_svg-screenshots-and-errorreporting-r2]

Projects : mp-wp : mp-wp_svg-screenshots-and-errorreporting-r2

mp-wp/wp-includes/post.php

1	<?php
2	/**
3	* Post functions and post utility function.
4	*
5	* @package WordPress
6	* @subpackage Post
7	* @since 1.5.0
8	*/
9
10	/**
11	* Retrieve attached file path based on attachment ID.
12	*
13	* You can optionally send it through the 'get_attached_file' filter, but by
14	* default it will just return the file path unfiltered.
15	*
16	* The function works by getting the single post meta name, named
17	* '_wp_attached_file' and returning it. This is a convenience function to
18	* prevent looking up the meta name and provide a mechanism for sending the
19	* attached filename through a filter.
20	*
21	* @since 2.0.0
22	* @uses apply_filters() Calls 'get_attached_file' on file path and attachment ID.
23	*
24	* @param int $attachment_id Attachment ID.
25	* @param bool $unfiltered Whether to apply filters or not.
26	* @return string The file path to the attached file.
27	*/
28	function get_attached_file( $attachment_id, $unfiltered = false ) {
29	$file = get_post_meta( $attachment_id, '_wp_attached_file', true );
30	// If the file is relative, prepend upload dir
31	if ( 0 !== strpos($file, '/') && !preg_match('\|^.:\\\\|', $file) && ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) )
32	$file = $uploads['basedir'] . "/$file";
33	if ( $unfiltered )
34	return $file;
35	return apply_filters( 'get_attached_file', $file, $attachment_id );
36	}
37
38	/**
39	* Update attachment file path based on attachment ID.
40	*
41	* Used to update the file path of the attachment, which uses post meta name
42	* '_wp_attached_file' to store the path of the attachment.
43	*
44	* @since 2.1.0
45	* @uses apply_filters() Calls 'update_attached_file' on file path and attachment ID.
46	*
47	* @param int $attachment_id Attachment ID
48	* @param string $file File path for the attachment
49	* @return bool False on failure, true on success.
50	*/
51	function update_attached_file( $attachment_id, $file ) {
52	if ( !get_post( $attachment_id ) )
53	return false;
54
55	$file = apply_filters( 'update_attached_file', $file, $attachment_id );
56
57	// Make the file path relative to the upload dir
58	if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { // Get upload directory
59	if ( 0 === strpos($file, $uploads['basedir']) ) {// Check that the upload base exists in the file path
60	$file = str_replace($uploads['basedir'], '', $file); // Remove upload dir from the file path
61	$file = ltrim($file, '/');
62	}
63	}
64
65	return update_post_meta( $attachment_id, '_wp_attached_file', $file );
66	}
67
68	/**
69	* Retrieve all children of the post parent ID.
70	*
71	* Normally, without any enhancements, the children would apply to pages. In the
72	* context of the inner workings of WordPress, pages, posts, and attachments
73	* share the same table, so therefore the functionality could apply to any one
74	* of them. It is then noted that while this function does not work on posts, it
75	* does not mean that it won't work on posts. It is recommended that you know
76	* what context you wish to retrieve the children of.
77	*
78	* Attachments may also be made the child of a post, so if that is an accurate
79	* statement (which needs to be verified), it would then be possible to get
80	* all of the attachments for a post. Attachments have since changed since
81	* version 2.5, so this is most likely unaccurate, but serves generally as an
82	* example of what is possible.
83	*
84	* The arguments listed as defaults are for this function and also of the
85	* {@link get_posts()} function. The arguments are combined with the
86	* get_children defaults and are then passed to the {@link get_posts()}
87	* function, which accepts additional arguments. You can replace the defaults in
88	* this function, listed below and the additional arguments listed in the
89	* {@link get_posts()} function.
90	*
91	* The 'post_parent' is the most important argument and important attention
92	* needs to be paid to the $args parameter. If you pass either an object or an
93	* integer (number), then just the 'post_parent' is grabbed and everything else
94	* is lost. If you don't specify any arguments, then it is assumed that you are
95	* in The Loop and the post parent will be grabbed for from the current post.
96	*
97	* The 'post_parent' argument is the ID to get the children. The 'numberposts'
98	* is the amount of posts to retrieve that has a default of '-1', which is
99	* used to get all of the posts. Giving a number higher than 0 will only
100	* retrieve that amount of posts.
101	*
102	* The 'post_type' and 'post_status' arguments can be used to choose what
103	* criteria of posts to retrieve. The 'post_type' can be anything, but WordPress
104	* post types are 'post', 'pages', and 'attachments'. The 'post_status'
105	* argument will accept any post status within the write administration panels.
106	*
107	* @see get_posts() Has additional arguments that can be replaced.
108	* @internal Claims made in the long description might be inaccurate.
109	*
110	* @since 2.0.0
111	*
112	* @param mixed $args Optional. User defined arguments for replacing the defaults.
113	* @param string $output Optional. Constant for return type, either OBJECT (default), ARRAY_A, ARRAY_N.
114	* @return array\|bool False on failure and the type will be determined by $output parameter.
115	*/
116	function &get_children($args = '', $output = OBJECT) {
117	if ( empty( $args ) ) {
118	if ( isset( $GLOBALS['post'] ) ) {
119	$args = array('post_parent' => (int) $GLOBALS['post']->post_parent );
120	} else {
121	return false;
122	}
123	} elseif ( is_object( $args ) ) {
124	$args = array('post_parent' => (int) $args->post_parent );
125	} elseif ( is_numeric( $args ) ) {
126	$args = array('post_parent' => (int) $args);
127	}
128
129	$defaults = array(
130	'numberposts' => -1, 'post_type' => 'any',
131	'post_status' => 'any', 'post_parent' => 0,
132	);
133
134	$r = wp_parse_args( $args, $defaults );
135
136	$children = get_posts( $r );
137	if ( !$children ) {
138	$kids = false;
139	return $kids;
140	}
141
142	update_post_cache($children);
143
144	foreach ( $children as $key => $child )
145	$kids[$child->ID] =& $children[$key];
146
147	if ( $output == OBJECT ) {
148	return $kids;
149	} elseif ( $output == ARRAY_A ) {
150	foreach ( (array) $kids as $kid )
151	$weeuns[$kid->ID] = get_object_vars($kids[$kid->ID]);
152	return $weeuns;
153	} elseif ( $output == ARRAY_N ) {
154	foreach ( (array) $kids as $kid )
155	$babes[$kid->ID] = array_values(get_object_vars($kids[$kid->ID]));
156	return $babes;
157	} else {
158	return $kids;
159	}
160	}
161
162	/**
163	* Get extended entry info (<!--more-->).
164	*
165	* There should not be any space after the second dash and before the word
166	* 'more'. There can be text or space(s) after the word 'more', but won't be
167	* referenced.
168	*
169	* The returned array has 'main' and 'extended' keys. Main has the text before
170	* the <code><!--more--></code>. The 'extended' key has the content after the
171	* <code><!--more--></code> comment.
172	*
173	* @since 1.0.0
174	*
175	* @param string $post Post content.
176	* @return array Post before ('main') and after ('extended').
177	*/
178	function get_extended($post) {
179	//Match the new style more links
180	if ( preg_match('/<!--more(.*?)?-->/', $post, $matches) ) {
181	list($main, $extended) = explode($matches[0], $post, 2);
182	} else {
183	$main = $post;
184	$extended = '';
185	}
186
187	// Strip leading and trailing whitespace
188	$main = preg_replace('/^[\s](.)[\s]*$/', '\\1', $main);
189	$extended = preg_replace('/^[\s](.)[\s]*$/', '\\1', $extended);
190
191	return array('main' => $main, 'extended' => $extended);
192	}
193
194	/**
195	* Retrieves post data given a post ID or post object.
196	*
197	* See {@link sanitize_post()} for optional $filter values. Also, the parameter
198	* $post, must be given as a variable, since it is passed by reference.
199	*
200	* @since 1.5.1
201	* @uses $wpdb
202	* @link http://codex.wordpress.org/Function_Reference/get_post
203	*
204	* @param int\|object $post Post ID or post object.
205	* @param string $output Optional, default is Object. Either OBJECT, ARRAY_A, or ARRAY_N.
206	* @param string $filter Optional, default is raw.
207	* @return mixed Post data
208	*/
209	function &get_post(&$post, $output = OBJECT, $filter = 'raw') {
210	global $wpdb;
211	$null = null;
212
213	if ( empty($post) ) {
214	if ( isset($GLOBALS['post']) )
215	$_post = & $GLOBALS['post'];
216	else
217	return $null;
218	} elseif ( is_object($post) ) {
219	_get_post_ancestors($post);
220	wp_cache_add($post->ID, $post, 'posts');
221	$_post = &$post;
222	} else {
223	$post = (int) $post;
224	if ( ! $_post = wp_cache_get($post, 'posts') ) {
225	$_post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post));
226	if ( ! $_post )
227	return $null;
228	_get_post_ancestors($_post);
229	wp_cache_add($_post->ID, $_post, 'posts');
230	}
231	}
232
233	$_post = sanitize_post($_post, $filter);
234
235	if ( $output == OBJECT ) {
236	return $_post;
237	} elseif ( $output == ARRAY_A ) {
238	$__post = get_object_vars($_post);
239	return $__post;
240	} elseif ( $output == ARRAY_N ) {
241	$__post = array_values(get_object_vars($_post));
242	return $__post;
243	} else {
244	return $_post;
245	}
246	}
247
248	/**
249	* Retrieve ancestors of a post.
250	*
251	* @since 2.5.0
252	*
253	* @param int\|object $post Post ID or post object
254	* @return array Ancestor IDs or empty array if none are found.
255	*/
256	function get_post_ancestors($post) {
257	$post = get_post($post);
258
259	if ( !empty($post->ancestors) )
260	return $post->ancestors;
261
262	return array();
263	}
264
265	/**
266	* Retrieve data from a post field based on Post ID.
267	*
268	* Examples of the post field will be, 'post_type', 'post_status', 'content',
269	* etc and based off of the post object property or key names.
270	*
271	* The context values are based off of the taxonomy filter functions and
272	* supported values are found within those functions.
273	*
274	* @since 2.3.0
275	* @uses sanitize_post_field() See for possible $context values.
276	*
277	* @param string $field Post field name
278	* @param id $post Post ID
279	* @param string $context Optional. How to filter the field. Default is display.
280	* @return WP_Error\|string Value in post field or WP_Error on failure
281	*/
282	function get_post_field( $field, $post, $context = 'display' ) {
283	$post = (int) $post;
284	$post = get_post( $post );
285
286	if ( is_wp_error($post) )
287	return $post;
288
289	if ( !is_object($post) )
290	return '';
291
292	if ( !isset($post->$field) )
293	return '';
294
295	return sanitize_post_field($field, $post->$field, $post->ID, $context);
296	}
297
298	/**
299	* Retrieve the mime type of an attachment based on the ID.
300	*
301	* This function can be used with any post type, but it makes more sense with
302	* attachments.
303	*
304	* @since 2.0.0
305	*
306	* @param int $ID Optional. Post ID.
307	* @return bool\|string False on failure or returns the mime type
308	*/
309	function get_post_mime_type($ID = '') {
310	$post = & get_post($ID);
311
312	if ( is_object($post) )
313	return $post->post_mime_type;
314
315	return false;
316	}
317
318	/**
319	* Retrieve the post status based on the Post ID.
320	*
321	* If the post ID is of an attachment, then the parent post status will be given
322	* instead.
323	*
324	* @since 2.0.0
325	*
326	* @param int $ID Post ID
327	* @return string\|bool Post status or false on failure.
328	*/
329	function get_post_status($ID = '') {
330	$post = get_post($ID);
331
332	if ( is_object($post) ) {
333	if ( ('attachment' == $post->post_type) && $post->post_parent && ($post->ID != $post->post_parent) )
334	return get_post_status($post->post_parent);
335	else
336	return $post->post_status;
337	}
338
339	return false;
340	}
341
342	/**
343	* Retrieve all of the WordPress supported post statuses.
344	*
345	* Posts have a limited set of valid status values, this provides the
346	* post_status values and descriptions.
347	*
348	* @since 2.5.0
349	*
350	* @return array List of post statuses.
351	*/
352	function get_post_statuses( ) {
353	$status = array(
354	'draft' => __('Draft'),
355	'pending' => __('Pending Review'),
356	'private' => __('Private'),
357	'publish' => __('Published')
358	);
359
360	return $status;
361	}
362
363	/**
364	* Retrieve all of the WordPress support page statuses.
365	*
366	* Pages have a limited set of valid status values, this provides the
367	* post_status values and descriptions.
368	*
369	* @since 2.5.0
370	*
371	* @return array List of page statuses.
372	*/
373	function get_page_statuses( ) {
374	$status = array(
375	'draft' => __('Draft'),
376	'private' => __('Private'),
377	'publish' => __('Published')
378	);
379
380	return $status;
381	}
382
383	/**
384	* Retrieve the post type of the current post or of a given post.
385	*
386	* @since 2.1.0
387	*
388	* @uses $wpdb
389	* @uses $posts The Loop post global
390	*
391	* @param mixed $post Optional. Post object or post ID.
392	* @return bool\|string post type or false on failure.
393	*/
394	function get_post_type($post = false) {
395	global $posts;
396
397	if ( false === $post )
398	$post = $posts[0];
399	elseif ( (int) $post )
400	$post = get_post($post, OBJECT);
401
402	if ( is_object($post) )
403	return $post->post_type;
404
405	return false;
406	}
407
408	/**
409	* Updates the post type for the post ID.
410	*
411	* The page or post cache will be cleaned for the post ID.
412	*
413	* @since 2.5.0
414	*
415	* @uses $wpdb
416	*
417	* @param int $post_id Post ID to change post type. Not actually optional.
418	* @param string $post_type Optional, default is post. Supported values are 'post' or 'page' to name a few.
419	* @return int Amount of rows changed. Should be 1 for success and 0 for failure.
420	*/
421	function set_post_type( $post_id = 0, $post_type = 'post' ) {
422	global $wpdb;
423
424	$post_type = sanitize_post_field('post_type', $post_type, $post_id, 'db');
425	$return = $wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET post_type = %s WHERE ID = %d", $post_type, $post_id) );
426
427	if ( 'page' == $post_type )
428	clean_page_cache($post_id);
429	else
430	clean_post_cache($post_id);
431
432	return $return;
433	}
434
435	/**
436	* Retrieve list of latest posts or posts matching criteria.
437	*
438	* The defaults are as follows:
439	* 'numberposts' - Default is 5. Total number of posts to retrieve.
440	* 'offset' - Default is 0. See {@link WP_Query::query()} for more.
441	* 'category' - What category to pull the posts from.
442	* 'orderby' - Default is 'post_date'. How to order the posts.
443	* 'order' - Default is 'DESC'. The order to retrieve the posts.
444	* 'include' - See {@link WP_Query::query()} for more.
445	* 'exclude' - See {@link WP_Query::query()} for more.
446	* 'meta_key' - See {@link WP_Query::query()} for more.
447	* 'meta_value' - See {@link WP_Query::query()} for more.
448	* 'post_type' - Default is 'post'. Can be 'page', or 'attachment' to name a few.
449	* 'post_parent' - The parent of the post or post type.
450	* 'post_status' - Default is 'published'. Post status to retrieve.
451	*
452	* @since 1.2.0
453	* @uses $wpdb
454	* @uses WP_Query::query() See for more default arguments and information.
455	* @link http://codex.wordpress.org/Template_Tags/get_posts
456	*
457	* @param array $args Optional. Override defaults.
458	* @return array List of posts.
459	*/
460	function get_posts($args = null) {
461	$defaults = array(
462	'numberposts' => 5, 'offset' => 0,
463	'category' => 0, 'orderby' => 'post_date',
464	'order' => 'DESC', 'include' => '',
465	'exclude' => '', 'meta_key' => '',
466	'meta_value' =>'', 'post_type' => 'post',
467	'suppress_filters' => true
468	);
469
470	$r = wp_parse_args( $args, $defaults );
471	if ( empty( $r['post_status'] ) )
472	$r['post_status'] = ( 'attachment' == $r['post_type'] ) ? 'inherit' : 'publish';
473	if ( ! empty($r['numberposts']) )
474	$r['posts_per_page'] = $r['numberposts'];
475	if ( ! empty($r['category']) )
476	$r['cat'] = $r['category'];
477	if ( ! empty($r['include']) ) {
478	$incposts = preg_split('/[\s,]+/',$r['include']);
479	$r['posts_per_page'] = count($incposts); // only the number of posts included
480	$r['post__in'] = $incposts;
481	} elseif ( ! empty($r['exclude']) )
482	$r['post__not_in'] = preg_split('/[\s,]+/',$r['exclude']);
483
484	$r['caller_get_posts'] = true;
485
486	$get_posts = new WP_Query;
487	return $get_posts->query($r);
488
489	}
490
491	//
492	// Post meta functions
493	//
494
495	/**
496	* Add meta data field to a post.
497	*
498	* Post meta data is called "Custom Fields" on the Administration Panels.
499	*
500	* @since 1.5.0
501	* @uses $wpdb
502	* @link http://codex.wordpress.org/Function_Reference/add_post_meta
503	*
504	* @param int $post_id Post ID.
505	* @param string $key Metadata name.
506	* @param mixed $value Metadata value.
507	* @param bool $unique Optional, default is false. Whether the same key should not be added.
508	* @return bool False for failure. True for success.
509	*/
510	function add_post_meta($post_id, $meta_key, $meta_value, $unique = false) {
511	global $wpdb;
512
513	// make sure meta is added to the post, not a revision
514	if ( $the_post = wp_is_post_revision($post_id) )
515	$post_id = $the_post;
516
517	// expected_slashed ($meta_key)
518	$meta_key = stripslashes($meta_key);
519
520	if ( $unique && $wpdb->get_var( $wpdb->prepare( "SELECT meta_key FROM $wpdb->postmeta WHERE meta_key = %s AND post_id = %d", $meta_key, $post_id ) ) )
521	return false;
522
523	$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
524
525	$wpdb->insert( $wpdb->postmeta, compact( 'post_id', 'meta_key', 'meta_value' ) );
526
527	wp_cache_delete($post_id, 'post_meta');
528
529	return true;
530	}
531
532	/**
533	* Remove metadata matching criteria from a post.
534	*
535	* You can match based on the key, or key and value. Removing based on key and
536	* value, will keep from removing duplicate metadata with the same key. It also
537	* allows removing all metadata matching key, if needed.
538	*
539	* @since 1.5.0
540	* @uses $wpdb
541	* @link http://codex.wordpress.org/Function_Reference/delete_post_meta
542	*
543	* @param int $post_id post ID
544	* @param string $meta_key Metadata name.
545	* @param mixed $meta_value Optional. Metadata value.
546	* @return bool False for failure. True for success.
547	*/
548	function delete_post_meta($post_id, $meta_key, $meta_value = '') {
549	global $wpdb;
550
551	// make sure meta is added to the post, not a revision
552	if ( $the_post = wp_is_post_revision($post_id) )
553	$post_id = $the_post;
554
555	// expected_slashed ($meta_key, $meta_value)
556	$meta_key = stripslashes( $meta_key );
557	$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
558
559	if ( empty( $meta_value ) )
560	$meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = %s", $post_id, $meta_key ) );
561	else
562	$meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = %s AND meta_value = %s", $post_id, $meta_key, $meta_value ) );
563
564	if ( !$meta_id )
565	return false;
566
567	if ( empty( $meta_value ) )
568	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = %s", $post_id, $meta_key ) );
569	else
570	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = %s AND meta_value = %s", $post_id, $meta_key, $meta_value ) );
571
572	wp_cache_delete($post_id, 'post_meta');
573
574	return true;
575	}
576
577	/**
578	* Retrieve post meta field for a post.
579	*
580	* @since 1.5.0
581	* @uses $wpdb
582	* @link http://codex.wordpress.org/Function_Reference/get_post_meta
583	*
584	* @param int $post_id Post ID.
585	* @param string $key The meta key to retrieve.
586	* @param bool $single Whether to return a single value.
587	* @return mixed Will be an array if $single is false. Will be value of meta data field if $single is true.
588	*/
589	function get_post_meta($post_id, $key, $single = false) {
590	$post_id = (int) $post_id;
591
592	$meta_cache = wp_cache_get($post_id, 'post_meta');
593
594	if ( !$meta_cache ) {
595	update_postmeta_cache($post_id);
596	$meta_cache = wp_cache_get($post_id, 'post_meta');
597	}
598
599	if ( isset($meta_cache[$key]) ) {
600	if ( $single ) {
601	return maybe_unserialize( $meta_cache[$key][0] );
602	} else {
603	return array_map('maybe_unserialize', $meta_cache[$key]);
604	}
605	}
606
607	return '';
608	}
609
610	/**
611	* Update post meta field based on post ID.
612	*
613	* Use the $prev_value parameter to differentiate between meta fields with the
614	* same key and post ID.
615	*
616	* If the meta field for the post does not exist, it will be added.
617	*
618	* @since 1.5
619	* @uses $wpdb
620	* @link http://codex.wordpress.org/Function_Reference/update_post_meta
621	*
622	* @param int $post_id Post ID.
623	* @param string $key Metadata key.
624	* @param mixed $value Metadata value.
625	* @param mixed $prev_value Optional. Previous value to check before removing.
626	* @return bool False on failure, true if success.
627	*/
628	function update_post_meta($post_id, $meta_key, $meta_value, $prev_value = '') {
629	global $wpdb;
630
631	// make sure meta is added to the post, not a revision
632	if ( $the_post = wp_is_post_revision($post_id) )
633	$post_id = $the_post;
634
635	// expected_slashed ($meta_key)
636	$meta_key = stripslashes($meta_key);
637
638	if ( ! $wpdb->get_var( $wpdb->prepare( "SELECT meta_key FROM $wpdb->postmeta WHERE meta_key = %s AND post_id = %d", $meta_key, $post_id ) ) ) {
639	return add_post_meta($post_id, $meta_key, $meta_value);
640	}
641
642	$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
643
644	$data = compact( 'meta_value' );
645	$where = compact( 'meta_key', 'post_id' );
646
647	if ( !empty( $prev_value ) ) {
648	$prev_value = maybe_serialize($prev_value);
649	$where['meta_value'] = $prev_value;
650	}
651
652	$wpdb->update( $wpdb->postmeta, $data, $where );
653	wp_cache_delete($post_id, 'post_meta');
654	return true;
655	}
656
657	/**
658	* Delete everything from post meta matching meta key.
659	*
660	* @since 2.3.0
661	* @uses $wpdb
662	*
663	* @param string $post_meta_key Key to search for when deleting.
664	* @return bool Whether the post meta key was deleted from the database
665	*/
666	function delete_post_meta_by_key($post_meta_key) {
667	global $wpdb;
668	if ( $wpdb->query($wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key)) ) {
669	/** @todo Get post_ids and delete cache */
670	// wp_cache_delete($post_id, 'post_meta');
671	return true;
672	}
673	return false;
674	}
675
676	/**
677	* Retrieve post meta fields, based on post ID.
678	*
679	* The post meta fields are retrieved from the cache, so the function is
680	* optimized to be called more than once. It also applies to the functions, that
681	* use this function.
682	*
683	* @since 1.2.0
684	* @link http://codex.wordpress.org/Function_Reference/get_post_custom
685	*
686	* @uses $id Current Loop Post ID
687	*
688	* @param int $post_id post ID
689	* @return array
690	*/
691	function get_post_custom($post_id = 0) {
692	global $id;
693
694	if ( !$post_id )
695	$post_id = (int) $id;
696
697	$post_id = (int) $post_id;
698
699	if ( ! wp_cache_get($post_id, 'post_meta') )
700	update_postmeta_cache($post_id);
701
702	return wp_cache_get($post_id, 'post_meta');
703	}
704
705	/**
706	* Retrieve meta field names for a post.
707	*
708	* If there are no meta fields, then nothing (null) will be returned.
709	*
710	* @since 1.2.0
711	* @link http://codex.wordpress.org/Function_Reference/get_post_custom_keys
712	*
713	* @param int $post_id post ID
714	* @return array\|null Either array of the keys, or null if keys could not be retrieved.
715	*/
716	function get_post_custom_keys( $post_id = 0 ) {
717	$custom = get_post_custom( $post_id );
718
719	if ( !is_array($custom) )
720	return;
721
722	if ( $keys = array_keys($custom) )
723	return $keys;
724	}
725
726	/**
727	* Retrieve values for a custom post field.
728	*
729	* The parameters must not be considered optional. All of the post meta fields
730	* will be retrieved and only the meta field key values returned.
731	*
732	* @since 1.2.0
733	* @link http://codex.wordpress.org/Function_Reference/get_post_custom_values
734	*
735	* @param string $key Meta field key.
736	* @param int $post_id Post ID
737	* @return array Meta field values.
738	*/
739	function get_post_custom_values( $key = '', $post_id = 0 ) {
740	$custom = get_post_custom($post_id);
741
742	return $custom[$key];
743	}
744
745	/**
746	* Check if post is sticky.
747	*
748	* Sticky posts should remain at the top of The Loop. If the post ID is not
749	* given, then The Loop ID for the current post will be used.
750	*
751	* @since 2.7.0
752	*
753	* @param int $post_id Optional. Post ID.
754	* @return bool Whether post is sticky (true) or not sticky (false).
755	*/
756	function is_sticky($post_id = null) {
757	global $id;
758
759	$post_id = absint($post_id);
760
761	if ( !$post_id )
762	$post_id = absint($id);
763
764	$stickies = get_option('sticky_posts');
765
766	if ( !is_array($stickies) )
767	return false;
768
769	if ( in_array($post_id, $stickies) )
770	return true;
771
772	return false;
773	}
774
775	/**
776	* Sanitize every post field.
777	*
778	* If the context is 'raw', then the post object or array will just be returned.
779	*
780	* @since 2.3.0
781	* @uses sanitize_post_field() Used to sanitize the fields.
782	*
783	* @param object\|array $post The Post Object or Array
784	* @param string $context Optional, default is 'display'. How to sanitize post fields.
785	* @return object\|array The now sanitized Post Object or Array (will be the same type as $post)
786	*/
787	function sanitize_post($post, $context = 'display') {
788	if ( 'raw' == $context )
789	return $post;
790	if ( is_object($post) ) {
791	if ( !isset($post->ID) )
792	$post->ID = 0;
793	foreach ( array_keys(get_object_vars($post)) as $field )
794	$post->$field = sanitize_post_field($field, $post->$field, $post->ID, $context);
795	} else {
796	if ( !isset($post['ID']) )
797	$post['ID'] = 0;
798	foreach ( array_keys($post) as $field )
799	$post[$field] = sanitize_post_field($field, $post[$field], $post['ID'], $context);
800	}
801	return $post;
802	}
803
804	/**
805	* Sanitize post field based on context.
806	*
807	* Possible context values are: raw, edit, db, attribute, js, and display. The
808	* display context is used by default.
809	*
810	* @since 2.3.0
811	*
812	* @param string $field The Post Object field name.
813	* @param mixed $value The Post Object value.
814	* @param int $post_id Post ID.
815	* @param string $context How to sanitize post fields.
816	* @return mixed Sanitized value.
817	*/
818	function sanitize_post_field($field, $value, $post_id, $context) {
819	$int_fields = array('ID', 'post_parent', 'menu_order');
820	if ( in_array($field, $int_fields) )
821	$value = (int) $value;
822
823	if ( 'raw' == $context )
824	return $value;
825
826	$prefixed = false;
827	if ( false !== strpos($field, 'post_') ) {
828	$prefixed = true;
829	$field_no_prefix = str_replace('post_', '', $field);
830	}
831
832	if ( 'edit' == $context ) {
833	$format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password');
834
835	if ( $prefixed ) {
836	$value = apply_filters("edit_$field", $value, $post_id);
837	// Old school
838	$value = apply_filters("${field_no_prefix}_edit_pre", $value, $post_id);
839	} else {
840	$value = apply_filters("edit_post_$field", $value, $post_id);
841	}
842
843	if ( in_array($field, $format_to_edit) ) {
844	$value = format_to_edit($value);
845	} else {
846	$value = attribute_escape($value);
847	}
848	} else if ( 'db' == $context ) {
849	if ( $prefixed ) {
850	$value = apply_filters("pre_$field", $value);
851	$value = apply_filters("${field_no_prefix}_save_pre", $value);
852	} else {
853	$value = apply_filters("pre_post_$field", $value);
854	$value = apply_filters("${field}_pre", $value);
855	}
856	} else {
857	// Use display filters by default.
858	if ( $prefixed )
859	$value = apply_filters($field, $value, $post_id, $context);
860	else
861	$value = apply_filters("post_$field", $value, $post_id, $context);
862	}
863
864	if ( 'attribute' == $context )
865	$value = attribute_escape($value);
866	else if ( 'js' == $context )
867	$value = js_escape($value);
868
869	return $value;
870	}
871
872	/**
873	* Make a post sticky.
874	*
875	* Sticky posts should be displayed at the top of the front page.
876	*
877	* @since 2.7.0
878	*
879	* @param int $post_id Post ID.
880	*/
881	function stick_post($post_id) {
882	$stickies = get_option('sticky_posts');
883
884	if ( !is_array($stickies) )
885	$stickies = array($post_id);
886
887	if ( ! in_array($post_id, $stickies) )
888	$stickies[] = $post_id;
889
890	update_option('sticky_posts', $stickies);
891	}
892
893	/**
894	* Unstick a post.
895	*
896	* Sticky posts should be displayed at the top of the front page.
897	*
898	* @since 2.7.0
899	*
900	* @param int $post_id Post ID.
901	*/
902	function unstick_post($post_id) {
903	$stickies = get_option('sticky_posts');
904
905	if ( !is_array($stickies) )
906	return;
907
908	if ( ! in_array($post_id, $stickies) )
909	return;
910
911	$offset = array_search($post_id, $stickies);
912	if ( false === $offset )
913	return;
914
915	array_splice($stickies, $offset, 1);
916
917	update_option('sticky_posts', $stickies);
918	}
919
920	/**
921	* Count number of posts of a post type and is user has permissions to view.
922	*
923	* This function provides an efficient method of finding the amount of post's
924	* type a blog has. Another method is to count the amount of items in
925	* get_posts(), but that method has a lot of overhead with doing so. Therefore,
926	* when developing for 2.5+, use this function instead.
927	*
928	* The $perm parameter checks for 'readable' value and if the user can read
929	* private posts, it will display that for the user that is signed in.
930	*
931	* @since 2.5.0
932	* @link http://codex.wordpress.org/Template_Tags/wp_count_posts
933	*
934	* @param string $type Optional. Post type to retrieve count
935	* @param string $perm Optional. 'readable' or empty.
936	* @return object Number of posts for each status
937	*/
938	function wp_count_posts( $type = 'post', $perm = '' ) {
939	global $wpdb;
940
941	$user = wp_get_current_user();
942
943	$cache_key = $type;
944
945	$query = "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s";
946	if ( 'readable' == $perm && is_user_logged_in() ) {
947	if ( !current_user_can("read_private_{$type}s") ) {
948	$cache_key .= '_' . $perm . '_' . $user->ID;
949	$query .= " AND (post_status != 'private' OR ( post_author = '$user->ID' AND post_status = 'private' ))";
950	}
951	}
952	$query .= ' GROUP BY post_status';
953
954	$count = wp_cache_get($cache_key, 'counts');
955	if ( false !== $count )
956	return $count;
957
958	$count = $wpdb->get_results( $wpdb->prepare( $query, $type ), ARRAY_A );
959
960	$stats = array( );
961	foreach( (array) $count as $row_num => $row ) {
962	$stats[$row['post_status']] = $row['num_posts'];
963	}
964
965	$stats = (object) $stats;
966	wp_cache_set($cache_key, $stats, 'counts');
967
968	return $stats;
969	}
970
971
972	/**
973	* Count number of attachments for the mime type(s).
974	*
975	* If you set the optional mime_type parameter, then an array will still be
976	* returned, but will only have the item you are looking for. It does not give
977	* you the number of attachments that are children of a post. You can get that
978	* by counting the number of children that post has.
979	*
980	* @since 2.5.0
981	*
982	* @param string\|array $mime_type Optional. Array or comma-separated list of MIME patterns.
983	* @return array Number of posts for each mime type.
984	*/
985	function wp_count_attachments( $mime_type = '' ) {
986	global $wpdb;
987
988	$and = wp_post_mime_type_where( $mime_type );
989	$count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' $and GROUP BY post_mime_type", ARRAY_A );
990
991	$stats = array( );
992	foreach( (array) $count as $row ) {
993	$stats[$row['post_mime_type']] = $row['num_posts'];
994	}
995
996	return (object) $stats;
997	}
998
999	/**
1000	* Check a MIME-Type against a list.
1001	*
1002	* If the wildcard_mime_types parameter is a string, it must be comma separated
1003	* list. If the real_mime_types is a string, it is also comma separated to
1004	* create the list.
1005	*
1006	* @since 2.5.0
1007	*
1008	* @param string\|array $wildcard_mime_types e.g. audio/mpeg or image (same as image/) or flash (same as flash*)
1009	* @param string\|array $real_mime_types post_mime_type values
1010	* @return array array(wildcard=>array(real types))
1011	*/
1012	function wp_match_mime_types($wildcard_mime_types, $real_mime_types) {
1013	$matches = array();
1014	if ( is_string($wildcard_mime_types) )
1015	$wildcard_mime_types = array_map('trim', explode(',', $wildcard_mime_types));
1016	if ( is_string($real_mime_types) )
1017	$real_mime_types = array_map('trim', explode(',', $real_mime_types));
1018	$wild = '[-._a-z0-9]*';
1019	foreach ( (array) $wildcard_mime_types as $type ) {
1020	$type = str_replace('*', $wild, $type);
1021	$patternses[1][$type] = "^$type$";
1022	if ( false === strpos($type, '/') ) {
1023	$patternses[2][$type] = "^$type/";
1024	$patternses[3][$type] = $type;
1025	}
1026	}
1027	asort($patternses);
1028	foreach ( $patternses as $patterns )
1029	foreach ( $patterns as $type => $pattern )
1030	foreach ( (array) $real_mime_types as $real )
1031	if ( preg_match("#$pattern#", $real) && ( empty($matches[$type]) \|\| false === array_search($real, $matches[$type]) ) )
1032	$matches[$type][] = $real;
1033	return $matches;
1034	}
1035
1036	/**
1037	* Convert MIME types into SQL.
1038	*
1039	* @since 2.5.0
1040	*
1041	* @param string\|array $mime_types List of mime types or comma separated string of mime types.
1042	* @return string The SQL AND clause for mime searching.
1043	*/
1044	function wp_post_mime_type_where($post_mime_types) {
1045	$where = '';
1046	$wildcards = array('', '%', '%/%');
1047	if ( is_string($post_mime_types) )
1048	$post_mime_types = array_map('trim', explode(',', $post_mime_types));
1049	foreach ( (array) $post_mime_types as $mime_type ) {
1050	$mime_type = preg_replace('/\s/', '', $mime_type);
1051	$slashpos = strpos($mime_type, '/');
1052	if ( false !== $slashpos ) {
1053	$mime_group = preg_replace('/[^-*.a-zA-Z0-9]/', '', substr($mime_type, 0, $slashpos));
1054	$mime_subgroup = preg_replace('/[^-*.a-zA-Z0-9]/', '', substr($mime_type, $slashpos + 1));
1055	if ( empty($mime_subgroup) )
1056	$mime_subgroup = '*';
1057	else
1058	$mime_subgroup = str_replace('/', '', $mime_subgroup);
1059	$mime_pattern = "$mime_group/$mime_subgroup";
1060	} else {
1061	$mime_pattern = preg_replace('/[^-*.a-zA-Z0-9]/', '', $mime_type);
1062	if ( false === strpos($mime_pattern, '*') )
1063	$mime_pattern .= '/*';
1064	}
1065
1066	$mime_pattern = preg_replace('/\*+/', '%', $mime_pattern);
1067
1068	if ( in_array( $mime_type, $wildcards ) )
1069	return '';
1070
1071	if ( false !== strpos($mime_pattern, '%') )
1072	$wheres[] = "post_mime_type LIKE '$mime_pattern'";
1073	else
1074	$wheres[] = "post_mime_type = '$mime_pattern'";
1075	}
1076	if ( !empty($wheres) )
1077	$where = ' AND (' . join(' OR ', $wheres) . ') ';
1078	return $where;
1079	}
1080
1081	/**
1082	* Removes a post, attachment, or page.
1083	*
1084	* When the post and page goes, everything that is tied to it is deleted also.
1085	* This includes comments, post meta fields, and terms associated with the post.
1086	*
1087	* @since 1.0.0
1088	* @uses do_action() Calls 'deleted_post' hook on post ID.
1089	*
1090	* @param int $postid Post ID.
1091	* @return mixed
1092	*/
1093	function wp_delete_post($postid = 0) {
1094	global $wpdb, $wp_rewrite;
1095
1096	if ( !$post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
1097	return $post;
1098
1099	if ( 'attachment' == $post->post_type )
1100	return wp_delete_attachment($postid);
1101
1102	do_action('delete_post', $postid);
1103
1104	/** @todo delete for pluggable post taxonomies too */
1105	wp_delete_object_term_relationships($postid, array('category', 'post_tag'));
1106
1107	$parent_data = array( 'post_parent' => $post->post_parent );
1108	$parent_where = array( 'post_parent' => $postid );
1109
1110	if ( 'page' == $post->post_type) {
1111	// if the page is defined in option page_on_front or post_for_posts,
1112	// adjust the corresponding options
1113	if ( get_option('page_on_front') == $postid ) {
1114	update_option('show_on_front', 'posts');
1115	delete_option('page_on_front');
1116	}
1117	if ( get_option('page_for_posts') == $postid ) {
1118	delete_option('page_for_posts');
1119	}
1120
1121	// Point children of this page to its parent, also clean the cache of affected children
1122	$children_query = $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE post_parent = %d AND post_type='page'", $postid);
1123	$children = $wpdb->get_results($children_query);
1124
1125	$wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'page' ) );
1126	}
1127
1128	// Do raw query. wp_get_post_revisions() is filtered
1129	$revision_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_parent = %d AND post_type = 'revision'", $postid ) );
1130	// Use wp_delete_post (via wp_delete_post_revision) again. Ensures any meta/misplaced data gets cleaned up.
1131	foreach ( $revision_ids as $revision_id )
1132	wp_delete_post_revision( $revision_id );
1133
1134	// Point all attachments to this post up one level
1135	$wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'attachment' ) );
1136
1137	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid ));
1138
1139	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
1140
1141	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE post_id = %d", $postid ));
1142
1143	if ( 'page' == $post->post_type ) {
1144	clean_page_cache($postid);
1145
1146	foreach ( (array) $children as $child )
1147	clean_page_cache($child->ID);
1148
1149	$wp_rewrite->flush_rules();
1150	} else {
1151	clean_post_cache($postid);
1152	}
1153
1154	do_action('deleted_post', $postid);
1155
1156	return $post;
1157	}
1158
1159	/**
1160	* Retrieve the list of categories for a post.
1161	*
1162	* Compatibility layer for themes and plugins. Also an easy layer of abstraction
1163	* away from the complexity of the taxonomy layer.
1164	*
1165	* @since 2.1.0
1166	*
1167	* @uses wp_get_object_terms() Retrieves the categories. Args details can be found here.
1168	*
1169	* @param int $post_id Optional. The Post ID.
1170	* @param array $args Optional. Overwrite the defaults.
1171	* @return array
1172	*/
1173	function wp_get_post_categories( $post_id = 0, $args = array() ) {
1174	$post_id = (int) $post_id;
1175
1176	$defaults = array('fields' => 'ids');
1177	$args = wp_parse_args( $args, $defaults );
1178
1179	$cats = wp_get_object_terms($post_id, 'category', $args);
1180	return $cats;
1181	}
1182
1183	/**
1184	* Retrieve the tags for a post.
1185	*
1186	* There is only one default for this function, called 'fields' and by default
1187	* is set to 'all'. There are other defaults that can be override in
1188	* {@link wp_get_object_terms()}.
1189	*
1190	* @package WordPress
1191	* @subpackage Post
1192	* @since 2.3.0
1193	*
1194	* @uses wp_get_object_terms() Gets the tags for returning. Args can be found here
1195	*
1196	* @param int $post_id Optional. The Post ID
1197	* @param array $args Optional. Overwrite the defaults
1198	* @return array List of post tags.
1199	*/
1200	function wp_get_post_tags( $post_id = 0, $args = array() ) {
1201	$post_id = (int) $post_id;
1202
1203	$defaults = array('fields' => 'all');
1204	$args = wp_parse_args( $args, $defaults );
1205
1206	$tags = wp_get_object_terms($post_id, 'post_tag', $args);
1207
1208	return $tags;
1209	}
1210
1211	/**
1212	* Retrieve number of recent posts.
1213	*
1214	* @since 1.0.0
1215	* @uses $wpdb
1216	*
1217	* @param int $num Optional, default is 10. Number of posts to get.
1218	* @return array List of posts.
1219	*/
1220	function wp_get_recent_posts($num = 10) {
1221	global $wpdb;
1222
1223	// Set the limit clause, if we got a limit
1224	$num = (int) $num;
1225	if ($num) {
1226	$limit = "LIMIT $num";
1227	}
1228
1229	$sql = "SELECT * FROM $wpdb->posts WHERE post_type = 'post' ORDER BY post_date DESC $limit";
1230	$result = $wpdb->get_results($sql,ARRAY_A);
1231
1232	return $result ? $result : array();
1233	}
1234
1235	/**
1236	* Retrieve a single post, based on post ID.
1237	*
1238	* Has categories in 'post_category' property or key. Has tags in 'tags_input'
1239	* property or key.
1240	*
1241	* @since 1.0.0
1242	*
1243	* @param int $postid Post ID.
1244	* @param string $mode How to return result, either OBJECT, ARRAY_N, or ARRAY_A.
1245	* @return object\|array Post object or array holding post contents and information
1246	*/
1247	function wp_get_single_post($postid = 0, $mode = OBJECT) {
1248	$postid = (int) $postid;
1249
1250	$post = get_post($postid, $mode);
1251
1252	// Set categories and tags
1253	if($mode == OBJECT) {
1254	$post->post_category = wp_get_post_categories($postid);
1255	$post->tags_input = wp_get_post_tags($postid, array('fields' => 'names'));
1256	}
1257	else {
1258	$post['post_category'] = wp_get_post_categories($postid);
1259	$post['tags_input'] = wp_get_post_tags($postid, array('fields' => 'names'));
1260	}
1261
1262	return $post;
1263	}
1264
1265	/**
1266	* Insert a post.
1267	*
1268	* If the $postarr parameter has 'ID' set to a value, then post will be updated.
1269	*
1270	* You can set the post date manually, but setting the values for 'post_date'
1271	* and 'post_date_gmt' keys. You can close the comments or open the comments by
1272	* setting the value for 'comment_status' key.
1273	*
1274	* The defaults for the parameter $postarr are:
1275	* 'post_status' - Default is 'draft'.
1276	* 'post_type' - Default is 'post'.
1277	* 'post_author' - Default is current user ID. The ID of the user, who added
1278	* the post.
1279	* 'ping_status' - Default is the value in default ping status option.
1280	* Whether the attachment can accept pings.
1281	* 'post_parent' - Default is 0. Set this for the post it belongs to, if
1282	* any.
1283	* 'menu_order' - Default is 0. The order it is displayed.
1284	* 'to_ping' - Whether to ping.
1285	* 'pinged' - Default is empty string.
1286	* 'post_password' - Default is empty string. The password to access the
1287	* attachment.
1288	* 'guid' - Global Unique ID for referencing the attachment.
1289	* 'post_content_filtered' - Post content filtered.
1290	* 'post_excerpt' - Post excerpt.
1291	*
1292	* @since 1.0.0
1293	* @uses $wpdb
1294	* @uses $wp_rewrite
1295	* @uses $user_ID
1296	*
1297	* @param array $postarr Optional. Override defaults.
1298	* @param bool $wp_error Optional. Allow return of WP_Error on failure.
1299	* @return int\|WP_Error The value 0 or WP_Error on failure. The post ID on success.
1300	*/
1301	function wp_insert_post($postarr = array(), $wp_error = false) {
1302	global $wpdb, $wp_rewrite, $user_ID;
1303
1304	$defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
1305	'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
1306	'menu_order' => 0, 'to_ping' => '', 'pinged' => '', 'post_password' => '',
1307	'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0);
1308
1309	$postarr = wp_parse_args($postarr, $defaults);
1310	$postarr = sanitize_post($postarr, 'db');
1311
1312	// export array as variables
1313	extract($postarr, EXTR_SKIP);
1314
1315	// Are we updating or creating?
1316	$update = false;
1317	if ( !empty($ID) ) {
1318	$update = true;
1319	$previous_status = get_post_field('post_status', $ID);
1320	} else {
1321	$previous_status = 'new';
1322	}
1323
1324	if ( ('' == $post_content) && ('' == $post_title) && ('' == $post_excerpt) ) {
1325	if ( $wp_error )
1326	return new WP_Error('empty_content', __('Content, title, and excerpt are empty.'));
1327	else
1328	return 0;
1329	}
1330
1331	// Make sure we set a valid category
1332	if ( empty($post_category) \|\| 0 == count($post_category) \|\| !is_array($post_category) ) {
1333	$post_category = array(get_option('default_category'));
1334	}
1335
1336	//Set the default tag list
1337	if ( !isset($tags_input) )
1338	$tags_input = array();
1339
1340	if ( empty($post_author) )
1341	$post_author = $user_ID;
1342
1343	if ( empty($post_status) )
1344	$post_status = 'draft';
1345
1346	if ( empty($post_type) )
1347	$post_type = 'post';
1348
1349	$post_ID = 0;
1350
1351	// Get the post ID and GUID
1352	if ( $update ) {
1353	$post_ID = (int) $ID;
1354	$guid = get_post_field( 'guid', $post_ID );
1355	}
1356
1357	// Don't allow contributors to set to set the post slug for pending review posts
1358	if ( 'pending' == $post_status && !current_user_can( 'publish_posts' ) )
1359	$post_name = '';
1360
1361	// Create a valid post name. Drafts and pending posts are allowed to have an empty
1362	// post name.
1363	if ( empty($post_name) ) {
1364	if ( !in_array( $post_status, array( 'draft', 'pending' ) ) )
1365	$post_name = sanitize_title($post_title);
1366	} else {
1367	$post_name = sanitize_title($post_name);
1368	}
1369
1370	// 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
1371	if ( empty($post_date) \|\| '0000-00-00 00:00:00' == $post_date )
1372	$post_date = current_time('mysql');
1373
1374	if ( empty($post_date_gmt) \|\| '0000-00-00 00:00:00' == $post_date_gmt ) {
1375	if ( !in_array( $post_status, array( 'draft', 'pending' ) ) )
1376	$post_date_gmt = get_gmt_from_date($post_date);
1377	else
1378	$post_date_gmt = '0000-00-00 00:00:00';
1379	}
1380
1381	if ( $update \|\| '0000-00-00 00:00:00' == $post_date ) {
1382	$post_modified = current_time( 'mysql' );
1383	$post_modified_gmt = current_time( 'mysql', 1 );
1384	} else {
1385	$post_modified = $post_date;
1386	$post_modified_gmt = $post_date_gmt;
1387	}
1388
1389	if ( 'publish' == $post_status ) {
1390	$now = gmdate('Y-m-d H:i:59');
1391	if ( mysql2date('U', $post_date_gmt) > mysql2date('U', $now) )
1392	$post_status = 'future';
1393	}
1394
1395	if ( empty($comment_status) ) {
1396	if ( $update )
1397	$comment_status = 'closed';
1398	else
1399	$comment_status = get_option('default_comment_status');
1400	}
1401	if ( empty($ping_status) )
1402	$ping_status = get_option('default_ping_status');
1403
1404	if ( isset($to_ping) )
1405	$to_ping = preg_replace('\|\s+\|', "\n", $to_ping);
1406	else
1407	$to_ping = '';
1408
1409	if ( ! isset($pinged) )
1410	$pinged = '';
1411
1412	if ( isset($post_parent) )
1413	$post_parent = (int) $post_parent;
1414	else
1415	$post_parent = 0;
1416
1417	if ( !empty($post_ID) ) {
1418	if ( $post_parent == $post_ID ) {
1419	// Post can't be its own parent
1420	$post_parent = 0;
1421	} elseif ( !empty($post_parent) ) {
1422	$parent_post = get_post($post_parent);
1423	// Check for circular dependency
1424	if ( $parent_post->post_parent == $post_ID )
1425	$post_parent = 0;
1426	}
1427	}
1428
1429	if ( isset($menu_order) )
1430	$menu_order = (int) $menu_order;
1431	else
1432	$menu_order = 0;
1433
1434	if ( !isset($post_password) \|\| 'private' == $post_status )
1435	$post_password = '';
1436
1437	if ( !in_array( $post_status, array( 'draft', 'pending' ) ) ) {
1438	$post_name_check = $wpdb->get_var($wpdb->prepare("SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d AND post_parent = %d LIMIT 1", $post_name, $post_type, $post_ID, $post_parent));
1439
1440	if ($post_name_check \|\| in_array($post_name, $wp_rewrite->feeds) ) {
1441	$suffix = 2;
1442	do {
1443	$alt_post_name = substr($post_name, 0, 200-(strlen($suffix)+1)). "-$suffix";
1444	$post_name_check = $wpdb->get_var($wpdb->prepare("SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d AND post_parent = %d LIMIT 1", $alt_post_name, $post_type, $post_ID, $post_parent));
1445	$suffix++;
1446	} while ($post_name_check);
1447	$post_name = $alt_post_name;
1448	}
1449	}
1450
1451	// expected_slashed (everything!)
1452	$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' ) );
1453	$data = apply_filters('wp_insert_post_data', $data, $postarr);
1454	$data = stripslashes_deep( $data );
1455	$where = array( 'ID' => $post_ID );
1456
1457	if ($update) {
1458	do_action( 'pre_post_update', $post_ID );
1459	if ( false === $wpdb->update( $wpdb->posts, $data, $where ) ) {
1460	if ( $wp_error )
1461	return new WP_Error('db_update_error', __('Could not update post in the database'), $wpdb->last_error);
1462	else
1463	return 0;
1464	}
1465	} else {
1466	if ( isset($post_mime_type) )
1467	$data['post_mime_type'] = stripslashes( $post_mime_type ); // This isn't in the update
1468	// If there is a suggested ID, use it if not already present
1469	if ( !empty($import_id) ) {
1470	$import_id = (int) $import_id;
1471	if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
1472	$data['ID'] = $import_id;
1473	}
1474	}
1475	if ( false === $wpdb->insert( $wpdb->posts, $data ) ) {
1476	if ( $wp_error )
1477	return new WP_Error('db_insert_error', __('Could not insert post into the database'), $wpdb->last_error);
1478	else
1479	return 0;
1480	}
1481	$post_ID = (int) $wpdb->insert_id;
1482
1483	// use the newly generated $post_ID
1484	$where = array( 'ID' => $post_ID );
1485	}
1486
1487	if ( empty($post_name) && !in_array( $post_status, array( 'draft', 'pending' ) ) ) {
1488	$post_name = sanitize_title($post_title, $post_ID);
1489	$wpdb->update( $wpdb->posts, compact( 'post_name' ), $where );
1490	}
1491
1492	wp_set_post_categories( $post_ID, $post_category );
1493	wp_set_post_tags( $post_ID, $tags_input );
1494
1495	$current_guid = get_post_field( 'guid', $post_ID );
1496
1497	if ( 'page' == $post_type )
1498	clean_page_cache($post_ID);
1499	else
1500	clean_post_cache($post_ID);
1501
1502	// Set GUID
1503	if ( !$update && '' == $current_guid )
1504	$wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post_ID ) ), $where );
1505
1506	$post = get_post($post_ID);
1507
1508	if ( !empty($page_template) && 'page' == $post_type ) {
1509	$post->page_template = $page_template;
1510	$page_templates = get_page_templates();
1511	if ( 'default' != $page_template && !in_array($page_template, $page_templates) ) {
1512	if ( $wp_error )
1513	return new WP_Error('invalid_page_template', __('The page template is invalid.'));
1514	else
1515	return 0;
1516	}
1517	update_post_meta($post_ID, '_wp_page_template', $page_template);
1518	}
1519
1520	wp_transition_post_status($post_status, $previous_status, $post);
1521
1522	if ( $update)
1523	do_action('edit_post', $post_ID, $post);
1524
1525	do_action('save_post', $post_ID, $post);
1526	do_action('wp_insert_post', $post_ID, $post);
1527
1528	return $post_ID;
1529	}
1530
1531	/**
1532	* Update a post with new post data.
1533	*
1534	* The date does not have to be set for drafts. You can set the date and it will
1535	* not be overridden.
1536	*
1537	* @since 1.0.0
1538	*
1539	* @param array\|object $postarr Post data.
1540	* @return int 0 on failure, Post ID on success.
1541	*/
1542	function wp_update_post($postarr = array()) {
1543	if ( is_object($postarr) )
1544	$postarr = get_object_vars($postarr);
1545
1546	// First, get all of the original fields
1547	$post = wp_get_single_post($postarr['ID'], ARRAY_A);
1548
1549	// Escape data pulled from DB.
1550	$post = add_magic_quotes($post);
1551
1552	// Passed post category list overwrites existing category list if not empty.
1553	if ( isset($postarr['post_category']) && is_array($postarr['post_category'])
1554	&& 0 != count($postarr['post_category']) )
1555	$post_cats = $postarr['post_category'];
1556	else
1557	$post_cats = $post['post_category'];
1558
1559	// Drafts shouldn't be assigned a date unless explicitly done so by the user
1560	if ( in_array($post['post_status'], array('draft', 'pending')) && empty($postarr['edit_date']) &&
1561	('0000-00-00 00:00:00' == $post['post_date_gmt']) )
1562	$clear_date = true;
1563	else
1564	$clear_date = false;
1565
1566	// Merge old and new fields with new fields overwriting old ones.
1567	$postarr = array_merge($post, $postarr);
1568	$postarr['post_category'] = $post_cats;
1569	if ( $clear_date ) {
1570	$postarr['post_date'] = current_time('mysql');
1571	$postarr['post_date_gmt'] = '';
1572	}
1573
1574	if ($postarr['post_type'] == 'attachment')
1575	return wp_insert_attachment($postarr);
1576
1577	return wp_insert_post($postarr);
1578	}
1579
1580	/**
1581	* Publish a post by transitioning the post status.
1582	*
1583	* @since 2.1.0
1584	* @uses $wpdb
1585	* @uses do_action() Calls 'edit_post', 'save_post', and 'wp_insert_post' on post_id and post data.
1586	*
1587	* @param int $post_id Post ID.
1588	* @return null
1589	*/
1590	function wp_publish_post($post_id) {
1591	global $wpdb;
1592
1593	$post = get_post($post_id);
1594
1595	if ( empty($post) )
1596	return;
1597
1598	if ( 'publish' == $post->post_status )
1599	return;
1600
1601	$wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post_id ) );
1602
1603	$old_status = $post->post_status;
1604	$post->post_status = 'publish';
1605	wp_transition_post_status('publish', $old_status, $post);
1606
1607	// Update counts for the post's terms.
1608	foreach ( (array) get_object_taxonomies('post') as $taxonomy ) {
1609	$tt_ids = wp_get_object_terms($post_id, $taxonomy, 'fields=tt_ids');
1610	wp_update_term_count($tt_ids, $taxonomy);
1611	}
1612
1613	do_action('edit_post', $post_id, $post);
1614	do_action('save_post', $post_id, $post);
1615	do_action('wp_insert_post', $post_id, $post);
1616	}
1617
1618	/**
1619	* Publish future post and make sure post ID has future post status.
1620	*
1621	* Invoked by cron 'publish_future_post' event. This safeguard prevents cron
1622	* from publishing drafts, etc.
1623	*
1624	* @since 2.5.0
1625	*
1626	* @param int $post_id Post ID.
1627	* @return null Nothing is returned. Which can mean that no action is required or post was published.
1628	*/
1629	function check_and_publish_future_post($post_id) {
1630
1631	$post = get_post($post_id);
1632
1633	if ( empty($post) )
1634	return;
1635
1636	if ( 'future' != $post->post_status )
1637	return;
1638
1639	$time = strtotime( $post->post_date_gmt . ' GMT' );
1640
1641	if ( $time > time() ) { // Uh oh, someone jumped the gun!
1642	wp_clear_scheduled_hook( 'publish_future_post', $post_id ); // clear anything else in the system
1643	wp_schedule_single_event( $time, 'publish_future_post', array( $post_id ) );
1644	return;
1645	}
1646
1647	return wp_publish_post($post_id);
1648	}
1649
1650	/**
1651	* Adds tags to a post.
1652	*
1653	* @uses wp_set_post_tags() Same first two parameters, but the last parameter is always set to true.
1654	*
1655	* @package WordPress
1656	* @subpackage Post
1657	* @since 2.3.0
1658	*
1659	* @param int $post_id Post ID
1660	* @param string $tags The tags to set for the post, separated by commas.
1661	* @return bool\|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
1662	*/
1663	function wp_add_post_tags($post_id = 0, $tags = '') {
1664	return wp_set_post_tags($post_id, $tags, true);
1665	}
1666
1667
1668	/**
1669	* Set the tags for a post.
1670	*
1671	* @since 2.3.0
1672	* @uses wp_set_object_terms() Sets the tags for the post.
1673	*
1674	* @param int $post_id Post ID.
1675	* @param string $tags The tags to set for the post, separated by commas.
1676	* @param bool $append If true, don't delete existing tags, just add on. If false, replace the tags with the new tags.
1677	* @return bool\|null Will return false if $post_id is not an integer or is 0. Will return null otherwise
1678	*/
1679	function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
1680
1681	$post_id = (int) $post_id;
1682
1683	if ( !$post_id )
1684	return false;
1685
1686	if ( empty($tags) )
1687	$tags = array();
1688	$tags = (is_array($tags)) ? $tags : explode( ',', trim($tags, " \n\t\r\0\x0B,") );
1689	wp_set_object_terms($post_id, $tags, 'post_tag', $append);
1690	}
1691
1692	/**
1693	* Set categories for a post.
1694	*
1695	* If the post categories parameter is not set, then the default category is
1696	* going used.
1697	*
1698	* @since 2.1.0
1699	*
1700	* @param int $post_ID Post ID.
1701	* @param array $post_categories Optional. List of categories.
1702	* @return bool\|mixed
1703	*/
1704	function wp_set_post_categories($post_ID = 0, $post_categories = array()) {
1705	$post_ID = (int) $post_ID;
1706	// If $post_categories isn't already an array, make it one:
1707	if (!is_array($post_categories) \|\| 0 == count($post_categories) \|\| empty($post_categories))
1708	$post_categories = array(get_option('default_category'));
1709	else if ( 1 == count($post_categories) && '' == $post_categories[0] )
1710	return true;
1711
1712	$post_categories = array_map('intval', $post_categories);
1713	$post_categories = array_unique($post_categories);
1714
1715	return wp_set_object_terms($post_ID, $post_categories, 'category');
1716	}
1717
1718	/**
1719	* Transition the post status of a post.
1720	*
1721	* Calls hooks to transition post status. If the new post status is not the same
1722	* as the previous post status, then two hooks will be ran, the first is
1723	* 'transition_post_status' with new status, old status, and post data. The
1724	* next action called is 'OLDSTATUS_to_NEWSTATUS' the NEWSTATUS is the
1725	* $new_status parameter and the OLDSTATUS is $old_status parameter; it has the
1726	* post data.
1727	*
1728	* The final action will run whether or not the post statuses are the same. The
1729	* action is named 'NEWSTATUS_POSTTYPE', NEWSTATUS is from the $new_status
1730	* parameter and POSTTYPE is post_type post data.
1731	*
1732	* @since 2.3.0
1733	*
1734	* @param string $new_status Transition to this post status.
1735	* @param string $old_status Previous post status.
1736	* @param object $post Post data.
1737	*/
1738	function wp_transition_post_status($new_status, $old_status, $post) {
1739	if ( $new_status != $old_status ) {
1740	do_action('transition_post_status', $new_status, $old_status, $post);
1741	do_action("${old_status}_to_$new_status", $post);
1742	}
1743	do_action("${new_status}_$post->post_type", $post->ID, $post);
1744	}
1745
1746	//
1747	// Trackback and ping functions
1748	//
1749
1750	/**
1751	* Add a URL to those already pung.
1752	*
1753	* @since 1.5.0
1754	* @uses $wpdb
1755	*
1756	* @param int $post_id Post ID.
1757	* @param string $uri Ping URI.
1758	* @return int How many rows were updated.
1759	*/
1760	function add_ping($post_id, $uri) {
1761	global $wpdb;
1762	$pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
1763	$pung = trim($pung);
1764	$pung = preg_split('/\s/', $pung);
1765	$pung[] = $uri;
1766	$new = implode("\n", $pung);
1767	$new = apply_filters('add_ping', $new);
1768	// expected_slashed ($new)
1769	$new = stripslashes($new);
1770	return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) );
1771	}
1772
1773	/**
1774	* Retrieve enclosures already enclosed for a post.
1775	*
1776	* @since 1.5.0
1777	* @uses $wpdb
1778	*
1779	* @param int $post_id Post ID.
1780	* @return array List of enclosures
1781	*/
1782	function get_enclosed($post_id) {
1783	$custom_fields = get_post_custom( $post_id );
1784	$pung = array();
1785	if ( !is_array( $custom_fields ) )
1786	return $pung;
1787
1788	foreach ( $custom_fields as $key => $val ) {
1789	if ( 'enclosure' != $key \|\| !is_array( $val ) )
1790	continue;
1791	foreach( $val as $enc ) {
1792	$enclosure = split( "\n", $enc );
1793	$pung[] = trim( $enclosure[ 0 ] );
1794	}
1795	}
1796	$pung = apply_filters('get_enclosed', $pung);
1797	return $pung;
1798	}
1799
1800	/**
1801	* Retrieve URLs already pinged for a post.
1802	*
1803	* @since 1.5.0
1804	* @uses $wpdb
1805	*
1806	* @param int $post_id Post ID.
1807	* @return array
1808	*/
1809	function get_pung($post_id) {
1810	global $wpdb;
1811	$pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id ));
1812	$pung = trim($pung);
1813	$pung = preg_split('/\s/', $pung);
1814	$pung = apply_filters('get_pung', $pung);
1815	return $pung;
1816	}
1817
1818	/**
1819	* Retrieve URLs that need to be pinged.
1820	*
1821	* @since 1.5.0
1822	* @uses $wpdb
1823	*
1824	* @param int $post_id Post ID
1825	* @return array
1826	*/
1827	function get_to_ping($post_id) {
1828	global $wpdb;
1829	$to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id ));
1830	$to_ping = trim($to_ping);
1831	$to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);
1832	$to_ping = apply_filters('get_to_ping', $to_ping);
1833	return $to_ping;
1834	}
1835
1836	/**
1837	* Do trackbacks for a list of URLs.
1838	*
1839	* @since 1.0.0
1840	*
1841	* @param string $tb_list Comma separated list of URLs
1842	* @param int $post_id Post ID
1843	*/
1844	function trackback_url_list($tb_list, $post_id) {
1845	if ( ! empty( $tb_list ) ) {
1846	// get post data
1847	$postdata = wp_get_single_post($post_id, ARRAY_A);
1848
1849	// import postdata as variables
1850	extract($postdata, EXTR_SKIP);
1851
1852	// form an excerpt
1853	$excerpt = strip_tags($post_excerpt ? $post_excerpt : $post_content);
1854
1855	if (strlen($excerpt) > 255) {
1856	$excerpt = substr($excerpt,0,252) . '...';
1857	}
1858
1859	$trackback_urls = explode(',', $tb_list);
1860	foreach( (array) $trackback_urls as $tb_url) {
1861	$tb_url = trim($tb_url);
1862	trackback($tb_url, stripslashes($post_title), $excerpt, $post_id);
1863	}
1864	}
1865	}
1866
1867	//
1868	// Page functions
1869	//
1870
1871	/**
1872	* Get a list of page IDs.
1873	*
1874	* @since 2.0.0
1875	* @uses $wpdb
1876	*
1877	* @return array List of page IDs.
1878	*/
1879	function get_all_page_ids() {
1880	global $wpdb;
1881
1882	if ( ! $page_ids = wp_cache_get('all_page_ids', 'posts') ) {
1883	$page_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type = 'page'");
1884	wp_cache_add('all_page_ids', $page_ids, 'posts');
1885	}
1886
1887	return $page_ids;
1888	}
1889
1890	/**
1891	* Retrieves page data given a page ID or page object.
1892	*
1893	* @since 1.5.1
1894	*
1895	* @param mixed $page Page object or page ID. Passed by reference.
1896	* @param string $output What to output. OBJECT, ARRAY_A, or ARRAY_N.
1897	* @param string $filter How the return value should be filtered.
1898	* @return mixed Page data.
1899	*/
1900	function &get_page(&$page, $output = OBJECT, $filter = 'raw') {
1901	if ( empty($page) ) {
1902	if ( isset( $GLOBALS['page'] ) && isset( $GLOBALS['page']->ID ) ) {
1903	return get_post($GLOBALS['page'], $output, $filter);
1904	} else {
1905	$page = null;
1906	return $page;
1907	}
1908	}
1909
1910	$the_page = get_post($page, $output, $filter);
1911	return $the_page;
1912	}
1913
1914	/**
1915	* Retrieves a page given its path.
1916	*
1917	* @since 2.1.0
1918	* @uses $wpdb
1919	*
1920	* @param string $page_path Page path
1921	* @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A.
1922	* @return mixed Null when complete.
1923	*/
1924	function get_page_by_path($page_path, $output = OBJECT) {
1925	global $wpdb;
1926	$page_path = rawurlencode(urldecode($page_path));
1927	$page_path = str_replace('%2F', '/', $page_path);
1928	$page_path = str_replace('%20', ' ', $page_path);
1929	$page_paths = '/' . trim($page_path, '/');
1930	$leaf_path = sanitize_title(basename($page_paths));
1931	$page_paths = explode('/', $page_paths);
1932	$full_path = '';
1933	foreach( (array) $page_paths as $pathdir)
1934	$full_path .= ($pathdir!=''?'/':'') . sanitize_title($pathdir);
1935
1936	$pages = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_name = %s AND (post_type = 'page' OR post_type = 'attachment')", $leaf_path ));
1937
1938	if ( empty($pages) )
1939	return null;
1940
1941	foreach ($pages as $page) {
1942	$path = '/' . $leaf_path;
1943	$curpage = $page;
1944	while ($curpage->post_parent != 0) {
1945	$curpage = $wpdb->get_row( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE ID = %d and post_type='page'", $curpage->post_parent ));
1946	$path = '/' . $curpage->post_name . $path;
1947	}
1948
1949	if ( $path == $full_path )
1950	return get_page($page->ID, $output);
1951	}
1952
1953	return null;
1954	}
1955
1956	/**
1957	* Retrieve a page given its title.
1958	*
1959	* @since 2.1.0
1960	* @uses $wpdb
1961	*
1962	* @param string $page_title Page title
1963	* @param string $output Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A.
1964	* @return mixed
1965	*/
1966	function get_page_by_title($page_title, $output = OBJECT) {
1967	global $wpdb;
1968	$page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type='page'", $page_title ));
1969	if ( $page )
1970	return get_page($page, $output);
1971
1972	return null;
1973	}
1974
1975	/**
1976	* Retrieve child pages from list of pages matching page ID.
1977	*
1978	* Matches against the pages parameter against the page ID. Also matches all
1979	* children for the same to retrieve all children of a page. Does not make any
1980	* SQL queries to get the children.
1981	*
1982	* @since 1.5.1
1983	*
1984	* @param int $page_id Page ID.
1985	* @param array $pages List of pages' objects.
1986	* @return array
1987	*/
1988	function &get_page_children($page_id, $pages) {
1989	$page_list = array();
1990	foreach ( (array) $pages as $page ) {
1991	if ( $page->post_parent == $page_id ) {
1992	$page_list[] = $page;
1993	if ( $children = get_page_children($page->ID, $pages) )
1994	$page_list = array_merge($page_list, $children);
1995	}
1996	}
1997	return $page_list;
1998	}
1999
2000	/**
2001	* Order the pages with children under parents in a flat list.
2002	*
2003	* Fetches the pages returned as a FLAT list, but arranged in order of their
2004	* hierarchy, i.e., child parents immediately follow their parents.
2005	*
2006	* @since 2.0.0
2007	*
2008	* @param array $posts Posts array.
2009	* @param int $parent Parent page ID.
2010	* @return array
2011	*/
2012	function get_page_hierarchy($posts, $parent = 0) {
2013	$result = array ( );
2014	if ($posts) { foreach ( (array) $posts as $post) {
2015	if ($post->post_parent == $parent) {
2016	$result[$post->ID] = $post->post_name;
2017	$children = get_page_hierarchy($posts, $post->ID);
2018	$result += $children; //append $children to $result
2019	}
2020	} }
2021	return $result;
2022	}
2023
2024	/**
2025	* Builds URI for a page.
2026	*
2027	* Sub pages will be in the "directory" under the parent page post name.
2028	*
2029	* @since 1.5.0
2030	*
2031	* @param int $page_id Page ID.
2032	* @return string Page URI.
2033	*/
2034	function get_page_uri($page_id) {
2035	$page = get_page($page_id);
2036	$uri = $page->post_name;
2037
2038	// A page cannot be it's own parent.
2039	if ( $page->post_parent == $page->ID )
2040	return $uri;
2041
2042	while ($page->post_parent != 0) {
2043	$page = get_page($page->post_parent);
2044	$uri = $page->post_name . "/" . $uri;
2045	}
2046
2047	return $uri;
2048	}
2049
2050	/**
2051	* Retrieve a list of pages.
2052	*
2053	* The defaults that can be overridden are the following: 'child_of',
2054	* 'sort_order', 'sort_column', 'post_title', 'hierarchical', 'exclude',
2055	* 'include', 'meta_key', 'meta_value', and 'authors'.
2056	*
2057	* @since 1.5.0
2058	* @uses $wpdb
2059	*
2060	* @param mixed $args Optional. Array or string of options that overrides defaults.
2061	* @return array List of pages matching defaults or $args
2062	*/
2063	function &get_pages($args = '') {
2064	global $wpdb;
2065
2066	$defaults = array(
2067	'child_of' => 0, 'sort_order' => 'ASC',
2068	'sort_column' => 'post_title', 'hierarchical' => 1,
2069	'exclude' => '', 'include' => '',
2070	'meta_key' => '', 'meta_value' => '',
2071	'authors' => '', 'parent' => -1, 'exclude_tree' => ''
2072	);
2073
2074	$r = wp_parse_args( $args, $defaults );
2075	extract( $r, EXTR_SKIP );
2076
2077	$key = md5( serialize( compact(array_keys($defaults)) ) );
2078	if ( $cache = wp_cache_get( 'get_pages', 'posts' ) ) {
2079	if ( isset( $cache[ $key ] ) ) {
2080	$pages = apply_filters('get_pages', $cache[ $key ], $r );
2081	return $pages;
2082	}
2083	}
2084
2085	$inclusions = '';
2086	if ( !empty($include) ) {
2087	$child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include
2088	$parent = -1;
2089	$exclude = '';
2090	$meta_key = '';
2091	$meta_value = '';
2092	$hierarchical = false;
2093	$incpages = preg_split('/[\s,]+/',$include);
2094	if ( count($incpages) ) {
2095	foreach ( $incpages as $incpage ) {
2096	if (empty($inclusions))
2097	$inclusions = $wpdb->prepare(' AND ( ID = %d ', $incpage);
2098	else
2099	$inclusions .= $wpdb->prepare(' OR ID = %d ', $incpage);
2100	}
2101	}
2102	}
2103	if (!empty($inclusions))
2104	$inclusions .= ')';
2105
2106	$exclusions = '';
2107	if ( !empty($exclude) ) {
2108	$expages = preg_split('/[\s,]+/',$exclude);
2109	if ( count($expages) ) {
2110	foreach ( $expages as $expage ) {
2111	if (empty($exclusions))
2112	$exclusions = $wpdb->prepare(' AND ( ID <> %d ', $expage);
2113	else
2114	$exclusions .= $wpdb->prepare(' AND ID <> %d ', $expage);
2115	}
2116	}
2117	}
2118	if (!empty($exclusions))
2119	$exclusions .= ')';
2120
2121	$author_query = '';
2122	if (!empty($authors)) {
2123	$post_authors = preg_split('/[\s,]+/',$authors);
2124
2125	if ( count($post_authors) ) {
2126	foreach ( $post_authors as $post_author ) {
2127	//Do we have an author id or an author login?
2128	if ( 0 == intval($post_author) ) {
2129	$post_author = get_userdatabylogin($post_author);
2130	if ( empty($post_author) )
2131	continue;
2132	if ( empty($post_author->ID) )
2133	continue;
2134	$post_author = $post_author->ID;
2135	}
2136
2137	if ( '' == $author_query )
2138	$author_query = $wpdb->prepare(' post_author = %d ', $post_author);
2139	else
2140	$author_query .= $wpdb->prepare(' OR post_author = %d ', $post_author);
2141	}
2142	if ( '' != $author_query )
2143	$author_query = " AND ($author_query)";
2144	}
2145	}
2146
2147	$join = '';
2148	$where = "$exclusions $inclusions ";
2149	if ( ! empty( $meta_key ) \|\| ! empty( $meta_value ) ) {
2150	$join = " LEFT JOIN $wpdb->postmeta ON ( $wpdb->posts.ID = $wpdb->postmeta.post_id )";
2151
2152	// meta_key and meta_value might be slashed
2153	$meta_key = stripslashes($meta_key);
2154	$meta_value = stripslashes($meta_value);
2155	if ( ! empty( $meta_key ) )
2156	$where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_key = %s", $meta_key);
2157	if ( ! empty( $meta_value ) )
2158	$where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_value = %s", $meta_value);
2159
2160	}
2161
2162	if ( $parent >= 0 )
2163	$where .= $wpdb->prepare(' AND post_parent = %d ', $parent);
2164
2165	$query = "SELECT * FROM $wpdb->posts $join WHERE (post_type = 'page' AND post_status = 'publish') $where ";
2166	$query .= $author_query;
2167	$query .= " ORDER BY " . $sort_column . " " . $sort_order ;
2168
2169	$pages = $wpdb->get_results($query);
2170
2171	if ( empty($pages) ) {
2172	$pages = apply_filters('get_pages', array(), $r);
2173	return $pages;
2174	}
2175
2176	// Update cache.
2177	update_page_cache($pages);
2178
2179	if ( $child_of \|\| $hierarchical )
2180	$pages = & get_page_children($child_of, $pages);
2181
2182	if ( !empty($exclude_tree) ) {
2183	$exclude = array();
2184
2185	$exclude = (int) $exclude_tree;
2186	$children = get_page_children($exclude, $pages);
2187	$excludes = array();
2188	foreach ( $children as $child )
2189	$excludes[] = $child->ID;
2190	$excludes[] = $exclude;
2191	$total = count($pages);
2192	for ( $i = 0; $i < $total; $i++ ) {
2193	if ( in_array($pages[$i]->ID, $excludes) )
2194	unset($pages[$i]);
2195	}
2196	}
2197
2198	$cache[ $key ] = $pages;
2199	wp_cache_set( 'get_pages', $cache, 'posts' );
2200
2201	$pages = apply_filters('get_pages', $pages, $r);
2202
2203	return $pages;
2204	}
2205
2206	//
2207	// Attachment functions
2208	//
2209
2210	/**
2211	* Check if the attachment URI is local one and is really an attachment.
2212	*
2213	* @since 2.0.0
2214	*
2215	* @param string $url URL to check
2216	* @return bool True on success, false on failure.
2217	*/
2218	function is_local_attachment($url) {
2219	if (strpos($url, get_bloginfo('url')) === false)
2220	return false;
2221	if (strpos($url, get_bloginfo('url') . '/?attachment_id=') !== false)
2222	return true;
2223	if ( $id = url_to_postid($url) ) {
2224	$post = & get_post($id);
2225	if ( 'attachment' == $post->post_type )
2226	return true;
2227	}
2228	return false;
2229	}
2230
2231	/**
2232	* Insert an attachment.
2233	*
2234	* If you set the 'ID' in the $object parameter, it will mean that you are
2235	* updating and attempt to update the attachment. You can also set the
2236	* attachment name or title by setting the key 'post_name' or 'post_title'.
2237	*
2238	* You can set the dates for the attachment manually by setting the 'post_date'
2239	* and 'post_date_gmt' keys' values.
2240	*
2241	* By default, the comments will use the default settings for whether the
2242	* comments are allowed. You can close them manually or keep them open by
2243	* setting the value for the 'comment_status' key.
2244	*
2245	* The $object parameter can have the following:
2246	* 'post_status' - Default is 'draft'. Can not be override, set the same as
2247	* parent post.
2248	* 'post_type' - Default is 'post', will be set to attachment. Can not
2249	* override.
2250	* 'post_author' - Default is current user ID. The ID of the user, who added
2251	* the attachment.
2252	* 'ping_status' - Default is the value in default ping status option.
2253	* Whether the attachment can accept pings.
2254	* 'post_parent' - Default is 0. Can use $parent parameter or set this for
2255	* the post it belongs to, if any.
2256	* 'menu_order' - Default is 0. The order it is displayed.
2257	* 'to_ping' - Whether to ping.
2258	* 'pinged' - Default is empty string.
2259	* 'post_password' - Default is empty string. The password to access the
2260	* attachment.
2261	* 'guid' - Global Unique ID for referencing the attachment.
2262	* 'post_content_filtered' - Attachment post content filtered.
2263	* 'post_excerpt' - Attachment excerpt.
2264	*
2265	* @since 2.0.0
2266	* @uses $wpdb
2267	* @uses $user_ID
2268	*
2269	* @param string\|array $object Arguments to override defaults.
2270	* @param string $file Optional filename.
2271	* @param int $post_parent Parent post ID.
2272	* @return int Attachment ID.
2273	*/
2274	function wp_insert_attachment($object, $file = false, $parent = 0) {
2275	global $wpdb, $user_ID;
2276
2277	$defaults = array('post_status' => 'draft', 'post_type' => 'post', 'post_author' => $user_ID,
2278	'ping_status' => get_option('default_ping_status'), 'post_parent' => 0,
2279	'menu_order' => 0, 'to_ping' => '', 'pinged' => '', 'post_password' => '',
2280	'guid' => '', 'post_content_filtered' => '', 'post_excerpt' => '', 'import_id' => 0);
2281
2282	$object = wp_parse_args($object, $defaults);
2283	if ( !empty($parent) )
2284	$object['post_parent'] = $parent;
2285
2286	$object = sanitize_post($object, 'db');
2287
2288	// export array as variables
2289	extract($object, EXTR_SKIP);
2290
2291	// Make sure we set a valid category
2292	if ( !isset($post_category) \|\| 0 == count($post_category) \|\| !is_array($post_category)) {
2293	$post_category = array(get_option('default_category'));
2294	}
2295
2296	if ( empty($post_author) )
2297	$post_author = $user_ID;
2298
2299	$post_type = 'attachment';
2300	$post_status = 'inherit';
2301
2302	// Are we updating or creating?
2303	if ( !empty($ID) ) {
2304	$update = true;
2305	$post_ID = (int) $ID;
2306	} else {
2307	$update = false;
2308	$post_ID = 0;
2309	}
2310
2311	// Create a valid post name.
2312	if ( empty($post_name) )
2313	$post_name = sanitize_title($post_title);
2314	else
2315	$post_name = sanitize_title($post_name);
2316
2317	// expected_slashed ($post_name)
2318	$post_name_check = $wpdb->get_var( $wpdb->prepare( "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_status = 'inherit' AND ID != %d LIMIT 1", $post_name, $post_ID));
2319
2320	if ($post_name_check) {
2321	$suffix = 2;
2322	while ($post_name_check) {
2323	$alt_post_name = $post_name . "-$suffix";
2324	// expected_slashed ($alt_post_name, $post_name)
2325	$post_name_check = $wpdb->get_var( $wpdb->prepare( "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_status = 'inherit' AND ID != %d AND post_parent = %d LIMIT 1", $alt_post_name, $post_ID, $post_parent));
2326	$suffix++;
2327	}
2328	$post_name = $alt_post_name;
2329	}
2330
2331	if ( empty($post_date) )
2332	$post_date = current_time('mysql');
2333	if ( empty($post_date_gmt) )
2334	$post_date_gmt = current_time('mysql', 1);
2335
2336	if ( empty($post_modified) )
2337	$post_modified = $post_date;
2338	if ( empty($post_modified_gmt) )
2339	$post_modified_gmt = $post_date_gmt;
2340
2341	if ( empty($comment_status) ) {
2342	if ( $update )
2343	$comment_status = 'closed';
2344	else
2345	$comment_status = get_option('default_comment_status');
2346	}
2347	if ( empty($ping_status) )
2348	$ping_status = get_option('default_ping_status');
2349
2350	if ( isset($to_ping) )
2351	$to_ping = preg_replace('\|\s+\|', "\n", $to_ping);
2352	else
2353	$to_ping = '';
2354
2355	if ( isset($post_parent) )
2356	$post_parent = (int) $post_parent;
2357	else
2358	$post_parent = 0;
2359
2360	if ( isset($menu_order) )
2361	$menu_order = (int) $menu_order;
2362	else
2363	$menu_order = 0;
2364
2365	if ( !isset($post_password) )
2366	$post_password = '';
2367
2368	if ( ! isset($pinged) )
2369	$pinged = '';
2370
2371	// expected_slashed (everything!)
2372	$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' ) );
2373	$data = stripslashes_deep( $data );
2374
2375	if ( $update ) {
2376	$wpdb->update( $wpdb->posts, $data, array( 'ID' => $post_ID ) );
2377	} else {
2378	// If there is a suggested ID, use it if not already present
2379	if ( !empty($import_id) ) {
2380	$import_id = (int) $import_id;
2381	if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id) ) ) {
2382	$data['ID'] = $import_id;
2383	}
2384	}
2385
2386	$wpdb->insert( $wpdb->posts, $data );
2387	$post_ID = (int) $wpdb->insert_id;
2388	}
2389
2390	if ( empty($post_name) ) {
2391	$post_name = sanitize_title($post_title, $post_ID);
2392	$wpdb->update( $wpdb->posts, compact("post_name"), array( 'ID' => $post_ID ) );
2393	}
2394
2395	wp_set_post_categories($post_ID, $post_category);
2396
2397	if ( $file )
2398	update_attached_file( $post_ID, $file );
2399
2400	clean_post_cache($post_ID);
2401
2402	if ( $update) {
2403	do_action('edit_attachment', $post_ID);
2404	} else {
2405	do_action('add_attachment', $post_ID);
2406	}
2407
2408	return $post_ID;
2409	}
2410
2411	/**
2412	* Delete an attachment.
2413	*
2414	* Will remove the file also, when the attachment is removed. Removes all post
2415	* meta fields, taxonomy, comments, etc associated with the attachment (except
2416	* the main post).
2417	*
2418	* @since 2.0.0
2419	* @uses $wpdb
2420	* @uses do_action() Calls 'delete_attachment' hook on Attachment ID.
2421	*
2422	* @param int $postid Attachment ID.
2423	* @return mixed False on failure. Post data on success.
2424	*/
2425	function wp_delete_attachment($postid) {
2426	global $wpdb;
2427
2428	if ( !$post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
2429	return $post;
2430
2431	if ( 'attachment' != $post->post_type )
2432	return false;
2433
2434	$meta = wp_get_attachment_metadata( $postid );
2435	$file = get_attached_file( $postid );
2436
2437	/** @todo Delete for pluggable post taxonomies too */
2438	wp_delete_object_term_relationships($postid, array('category', 'post_tag'));
2439
2440	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid ));
2441
2442	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
2443
2444	$wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE post_id = %d ", $postid ));
2445
2446	$uploadPath = wp_upload_dir();
2447
2448	if ( ! empty($meta['thumb']) ) {
2449	// Don't delete the thumb if another attachment uses it
2450	if (! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%'.$meta['thumb'].'%', $postid)) ) {
2451	$thumbfile = str_replace(basename($file), $meta['thumb'], $file);
2452	$thumbfile = apply_filters('wp_delete_file', $thumbfile);
2453	@ unlink( path_join($uploadPath['basedir'], $thumbfile) );
2454	}
2455	}
2456
2457	// remove intermediate images if there are any
2458	$sizes = apply_filters('intermediate_image_sizes', array('thumbnail', 'medium', 'large'));
2459	foreach ( $sizes as $size ) {
2460	if ( $intermediate = image_get_intermediate_size($postid, $size) ) {
2461	$intermediate_file = apply_filters('wp_delete_file', $intermediate['path']);
2462	@ unlink( path_join($uploadPath['basedir'], $intermediate_file) );
2463	}
2464	}
2465
2466	$file = apply_filters('wp_delete_file', $file);
2467
2468	if ( ! empty($file) )
2469	@ unlink($file);
2470
2471	clean_post_cache($postid);
2472
2473	do_action('delete_attachment', $postid);
2474
2475	return $post;
2476	}
2477
2478	/**
2479	* Retrieve attachment meta field for attachment ID.
2480	*
2481	* @since 2.1.0
2482	*
2483	* @param int $post_id Attachment ID
2484	* @param bool $unfiltered Optional, default is false. If true, filters are not run.
2485	* @return string\|bool Attachment meta field. False on failure.
2486	*/
2487	function wp_get_attachment_metadata( $post_id, $unfiltered = false ) {
2488	$post_id = (int) $post_id;
2489	if ( !$post =& get_post( $post_id ) )
2490	return false;
2491
2492	$data = get_post_meta( $post->ID, '_wp_attachment_metadata', true );
2493	if ( $unfiltered )
2494	return $data;
2495	return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID );
2496	}
2497
2498	/**
2499	* Update metadata for an attachment.
2500	*
2501	* @since 2.1.0
2502	*
2503	* @param int $post_id Attachment ID.
2504	* @param array $data Attachment data.
2505	* @return int
2506	*/
2507	function wp_update_attachment_metadata( $post_id, $data ) {
2508	$post_id = (int) $post_id;
2509	if ( !$post =& get_post( $post_id ) )
2510	return false;
2511
2512	$data = apply_filters( 'wp_update_attachment_metadata', $data, $post->ID );
2513
2514	return update_post_meta( $post->ID, '_wp_attachment_metadata', $data);
2515	}
2516
2517	/**
2518	* Retrieve the URL for an attachment.
2519	*
2520	* @since 2.1.0
2521	*
2522	* @param int $post_id Attachment ID.
2523	* @return string
2524	*/
2525	function wp_get_attachment_url( $post_id = 0 ) {
2526	$post_id = (int) $post_id;
2527	if ( !$post =& get_post( $post_id ) )
2528	return false;
2529
2530	$url = '';
2531	if ( $file = get_post_meta( $post->ID, '_wp_attached_file', true) ) { //Get attached file
2532	if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { //Get upload directory
2533	if ( 0 === strpos($file, $uploads['basedir']) ) //Check that the upload base exists in the file location
2534	$url = str_replace($uploads['basedir'], $uploads['baseurl'], $file); //replace file location with url location
2535	}
2536	}
2537
2538	if ( empty($url) ) //If any of the above options failed, Fallback on the GUID as used pre-2.7, not recomended to rely upon this.
2539	$url = get_the_guid( $post->ID );
2540
2541	if ( 'attachment' != $post->post_type \|\| empty($url) )
2542	return false;
2543
2544	return apply_filters( 'wp_get_attachment_url', $url, $post->ID );
2545	}
2546
2547	/**
2548	* Retrieve thumbnail for an attachment.
2549	*
2550	* @since 2.1.0
2551	*
2552	* @param int $post_id Attachment ID.
2553	* @return mixed False on failure. Thumbnail file path on success.
2554	*/
2555	function wp_get_attachment_thumb_file( $post_id = 0 ) {
2556	$post_id = (int) $post_id;
2557	if ( !$post =& get_post( $post_id ) )
2558	return false;
2559	if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) )
2560	return false;
2561
2562	$file = get_attached_file( $post->ID );
2563
2564	if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) )
2565	return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID );
2566	return false;
2567	}
2568
2569	/**
2570	* Retrieve URL for an attachment thumbnail.
2571	*
2572	* @since 2.1.0
2573	*
2574	* @param int $post_id Attachment ID
2575	* @return string\|bool False on failure. Thumbnail URL on success.
2576	*/
2577	function wp_get_attachment_thumb_url( $post_id = 0 ) {
2578	$post_id = (int) $post_id;
2579	if ( !$post =& get_post( $post_id ) )
2580	return false;
2581	if ( !$url = wp_get_attachment_url( $post->ID ) )
2582	return false;
2583
2584	$sized = image_downsize( $post_id, 'thumbnail' );
2585	if ( $sized )
2586	return $sized[0];
2587
2588	if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
2589	return false;
2590
2591	$url = str_replace(basename($url), basename($thumb), $url);
2592
2593	return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
2594	}
2595
2596	/**
2597	* Check if the attachment is an image.
2598	*
2599	* @since 2.1.0
2600	*
2601	* @param int $post_id Attachment ID
2602	* @return bool
2603	*/
2604	function wp_attachment_is_image( $post_id = 0 ) {
2605	$post_id = (int) $post_id;
2606	if ( !$post =& get_post( $post_id ) )
2607	return false;
2608
2609	if ( !$file = get_attached_file( $post->ID ) )
2610	return false;
2611
2612	$ext = preg_match('/\.([^.]+)$/', $file, $matches) ? strtolower($matches[1]) : false;
2613
2614	$image_exts = array('jpg', 'jpeg', 'gif', 'png');
2615
2616	if ( 'image/' == substr($post->post_mime_type, 0, 6) \|\| $ext && 'import' == $post->post_mime_type && in_array($ext, $image_exts) )
2617	return true;
2618	return false;
2619	}
2620
2621	/**
2622	* Retrieve the icon for a MIME type.
2623	*
2624	* @since 2.1.0
2625	*
2626	* @param string $mime MIME type
2627	* @return string\|bool
2628	*/
2629	function wp_mime_type_icon( $mime = 0 ) {
2630	if ( !is_numeric($mime) )
2631	$icon = wp_cache_get("mime_type_icon_$mime");
2632	if ( empty($icon) ) {
2633	$post_id = 0;
2634	$post_mimes = array();
2635	if ( is_numeric($mime) ) {
2636	$mime = (int) $mime;
2637	if ( $post =& get_post( $mime ) ) {
2638	$post_id = (int) $post->ID;
2639	$ext = preg_replace('/^.+?\.([^.]+)$/', '$1', $post->guid);
2640	if ( !empty($ext) ) {
2641	$post_mimes[] = $ext;
2642	if ( $ext_type = wp_ext2type( $ext ) )
2643	$post_mimes[] = $ext_type;
2644	}
2645	$mime = $post->post_mime_type;
2646	} else {
2647	$mime = 0;
2648	}
2649	} else {
2650	$post_mimes[] = $mime;
2651	}
2652
2653	$icon_files = wp_cache_get('icon_files');
2654
2655	if ( !is_array($icon_files) ) {
2656	$icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
2657	$icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url('images/crystal') );
2658	$dirs = apply_filters( 'icon_dirs', array($icon_dir => $icon_dir_uri) );
2659	$icon_files = array();
2660	while ( $dirs ) {
2661	$dir = array_shift($keys = array_keys($dirs));
2662	$uri = array_shift($dirs);
2663	if ( $dh = opendir($dir) ) {
2664	while ( false !== $file = readdir($dh) ) {
2665	$file = basename($file);
2666	if ( substr($file, 0, 1) == '.' )
2667	continue;
2668	if ( !in_array(strtolower(substr($file, -4)), array('.png', '.gif', '.jpg') ) ) {
2669	if ( is_dir("$dir/$file") )
2670	$dirs["$dir/$file"] = "$uri/$file";
2671	continue;
2672	}
2673	$icon_files["$dir/$file"] = "$uri/$file";
2674	}
2675	closedir($dh);
2676	}
2677	}
2678	wp_cache_set('icon_files', $icon_files, 600);
2679	}
2680
2681	// Icon basename - extension = MIME wildcard
2682	foreach ( $icon_files as $file => $uri )
2683	$types[ preg_replace('/^([^.]).$/', '$1', basename($file)) ] =& $icon_files[$file];
2684
2685	if ( ! empty($mime) ) {
2686	$post_mimes[] = substr($mime, 0, strpos($mime, '/'));
2687	$post_mimes[] = substr($mime, strpos($mime, '/') + 1);
2688	$post_mimes[] = str_replace('/', '_', $mime);
2689	}
2690
2691	$matches = wp_match_mime_types(array_keys($types), $post_mimes);
2692	$matches['default'] = array('default');
2693
2694	foreach ( $matches as $match => $wilds ) {
2695	if ( isset($types[$wilds[0]])) {
2696	$icon = $types[$wilds[0]];
2697	if ( !is_numeric($mime) )
2698	wp_cache_set("mime_type_icon_$mime", $icon);
2699	break;
2700	}
2701	}
2702	}
2703
2704	return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id ); // Last arg is 0 if function pass mime type.
2705	}
2706
2707	/**
2708	* Checked for changed slugs for published posts and save old slug.
2709	*
2710	* The function is used along with form POST data. It checks for the wp-old-slug
2711	* POST field. Will only be concerned with published posts and the slug actually
2712	* changing.
2713	*
2714	* If the slug was changed and not already part of the old slugs then it will be
2715	* added to the post meta field ('_wp_old_slug') for storing old slugs for that
2716	* post.
2717	*
2718	* The most logically usage of this function is redirecting changed posts, so
2719	* that those that linked to an changed post will be redirected to the new post.
2720	*
2721	* @since 2.1.0
2722	*
2723	* @param int $post_id Post ID.
2724	* @return int Same as $post_id
2725	*/
2726	function wp_check_for_changed_slugs($post_id) {
2727	if ( !isset($_POST['wp-old-slug']) \|\| !strlen($_POST['wp-old-slug']) )
2728	return $post_id;
2729
2730	$post = &get_post($post_id);
2731
2732	// we're only concerned with published posts
2733	if ( $post->post_status != 'publish' \|\| $post->post_type != 'post' )
2734	return $post_id;
2735
2736	// only bother if the slug has changed
2737	if ( $post->post_name == $_POST['wp-old-slug'] )
2738	return $post_id;
2739
2740	$old_slugs = (array) get_post_meta($post_id, '_wp_old_slug');
2741
2742	// if we haven't added this old slug before, add it now
2743	if ( !count($old_slugs) \|\| !in_array($_POST['wp-old-slug'], $old_slugs) )
2744	add_post_meta($post_id, '_wp_old_slug', $_POST['wp-old-slug']);
2745
2746	// if the new slug was used previously, delete it from the list
2747	if ( in_array($post->post_name, $old_slugs) )
2748	delete_post_meta($post_id, '_wp_old_slug', $post->post_name);
2749
2750	return $post_id;
2751	}
2752
2753	/**
2754	* Retrieve the private post SQL based on capability.
2755	*
2756	* This function provides a standardized way to appropriately select on the
2757	* post_status of posts/pages. The function will return a piece of SQL code that
2758	* can be added to a WHERE clause; this SQL is constructed to allow all
2759	* published posts, and all private posts to which the user has access.
2760	*
2761	* It also allows plugins that define their own post type to control the cap by
2762	* using the hook 'pub_priv_sql_capability'. The plugin is expected to return
2763	* the capability the user must have to read the private post type.
2764	*
2765	* @since 2.2.0
2766	*
2767	* @uses $user_ID
2768	* @uses apply_filters() Call 'pub_priv_sql_capability' filter for plugins with different post types.
2769	*
2770	* @param string $post_type currently only supports 'post' or 'page'.
2771	* @return string SQL code that can be added to a where clause.
2772	*/
2773	function get_private_posts_cap_sql($post_type) {
2774	global $user_ID;
2775	$cap = '';
2776
2777	// Private posts
2778	if ($post_type == 'post') {
2779	$cap = 'read_private_posts';
2780	// Private pages
2781	} elseif ($post_type == 'page') {
2782	$cap = 'read_private_pages';
2783	// Dunno what it is, maybe plugins have their own post type?
2784	} else {
2785	$cap = apply_filters('pub_priv_sql_capability', $cap);
2786
2787	if (empty($cap)) {
2788	// We don't know what it is, filters don't change anything,
2789	// so set the SQL up to return nothing.
2790	return '1 = 0';
2791	}
2792	}
2793
2794	$sql = '(post_status = \'publish\'';
2795
2796	if (current_user_can($cap)) {
2797	// Does the user have the capability to view private posts? Guess so.
2798	$sql .= ' OR post_status = \'private\'';
2799	} elseif (is_user_logged_in()) {
2800	// Users can view their own private posts.
2801	$sql .= ' OR post_status = \'private\' AND post_author = \'' . $user_ID . '\'';
2802	}
2803
2804	$sql .= ')';
2805
2806	return $sql;
2807	}
2808
2809	/**
2810	* Retrieve the date the the last post was published.
2811	*
2812	* The server timezone is the default and is the difference between GMT and
2813	* server time. The 'blog' value is the date when the last post was posted. The
2814	* 'gmt' is when the last post was posted in GMT formatted date.
2815	*
2816	* @since 0.71
2817	*
2818	* @uses $wpdb
2819	* @uses $blog_id
2820	* @uses apply_filters() Calls 'get_lastpostdate' filter
2821	*
2822	* @global mixed $cache_lastpostdate Stores the last post date
2823	* @global mixed $pagenow The current page being viewed
2824	*
2825	* @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
2826	* @return string The date of the last post.
2827	*/
2828	function get_lastpostdate($timezone = 'server') {
2829	global $cache_lastpostdate, $wpdb, $blog_id;
2830	$add_seconds_server = date('Z');
2831	if ( !isset($cache_lastpostdate[$blog_id][$timezone]) ) {
2832	switch(strtolower($timezone)) {
2833	case 'gmt':
2834	$lastpostdate = $wpdb->get_var("SELECT post_date_gmt FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
2835	break;
2836	case 'blog':
2837	$lastpostdate = $wpdb->get_var("SELECT post_date FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
2838	break;
2839	case 'server':
2840	$lastpostdate = $wpdb->get_var("SELECT DATE_ADD(post_date_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
2841	break;
2842	}
2843	$cache_lastpostdate[$blog_id][$timezone] = $lastpostdate;
2844	} else {
2845	$lastpostdate = $cache_lastpostdate[$blog_id][$timezone];
2846	}
2847	return apply_filters( 'get_lastpostdate', $lastpostdate, $timezone );
2848	}
2849
2850	/**
2851	* Retrieve last post modified date depending on timezone.
2852	*
2853	* The server timezone is the default and is the difference between GMT and
2854	* server time. The 'blog' value is just when the last post was modified. The
2855	* 'gmt' is when the last post was modified in GMT time.
2856	*
2857	* @since 1.2.0
2858	* @uses $wpdb
2859	* @uses $blog_id
2860	* @uses apply_filters() Calls 'get_lastpostmodified' filter
2861	*
2862	* @global mixed $cache_lastpostmodified Stores the date the last post was modified
2863	*
2864	* @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
2865	* @return string The date the post was last modified.
2866	*/
2867	function get_lastpostmodified($timezone = 'server') {
2868	global $cache_lastpostmodified, $wpdb, $blog_id;
2869	$add_seconds_server = date('Z');
2870	if ( !isset($cache_lastpostmodified[$blog_id][$timezone]) ) {
2871	switch(strtolower($timezone)) {
2872	case 'gmt':
2873	$lastpostmodified = $wpdb->get_var("SELECT post_modified_gmt FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
2874	break;
2875	case 'blog':
2876	$lastpostmodified = $wpdb->get_var("SELECT post_modified FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
2877	break;
2878	case 'server':
2879	$lastpostmodified = $wpdb->get_var("SELECT DATE_ADD(post_modified_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
2880	break;
2881	}
2882	$lastpostdate = get_lastpostdate($timezone);
2883	if ( $lastpostdate > $lastpostmodified ) {
2884	$lastpostmodified = $lastpostdate;
2885	}
2886	$cache_lastpostmodified[$blog_id][$timezone] = $lastpostmodified;
2887	} else {
2888	$lastpostmodified = $cache_lastpostmodified[$blog_id][$timezone];
2889	}
2890	return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
2891	}
2892
2893	/**
2894	* Updates posts in cache.
2895	*
2896	* @usedby update_page_cache() Aliased by this function.
2897	*
2898	* @package WordPress
2899	* @subpackage Cache
2900	* @since 1.5.1
2901	*
2902	* @param array $posts Array of post objects
2903	*/
2904	function update_post_cache(&$posts) {
2905	if ( !$posts )
2906	return;
2907
2908	foreach ( $posts as $post )
2909	wp_cache_add($post->ID, $post, 'posts');
2910	}
2911
2912	/**
2913	* Will clean the post in the cache.
2914	*
2915	* Cleaning means delete from the cache of the post. Will call to clean the term
2916	* object cache associated with the post ID.
2917	*
2918	* @package WordPress
2919	* @subpackage Cache
2920	* @since 2.0.0
2921	*
2922	* @uses do_action() Will call the 'clean_post_cache' hook action.
2923	*
2924	* @param int $id The Post ID in the cache to clean
2925	*/
2926	function clean_post_cache($id) {
2927	global $_wp_suspend_cache_invalidation, $wpdb;
2928
2929	if ( !empty($_wp_suspend_cache_invalidation) )
2930	return;
2931
2932	$id = (int) $id;
2933
2934	wp_cache_delete($id, 'posts');
2935	wp_cache_delete($id, 'post_meta');
2936
2937	clean_object_term_cache($id, 'post');
2938
2939	wp_cache_delete( 'wp_get_archives', 'general' );
2940
2941	do_action('clean_post_cache', $id);
2942
2943	if ( $children = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_parent = %d", $id) ) ) {
2944	foreach( $children as $cid )
2945	clean_post_cache( $cid );
2946	}
2947	}
2948
2949	/**
2950	* Alias of update_post_cache().
2951	*
2952	* @see update_post_cache() Posts and pages are the same, alias is intentional
2953	*
2954	* @package WordPress
2955	* @subpackage Cache
2956	* @since 1.5.1
2957	*
2958	* @param array $pages list of page objects
2959	*/
2960	function update_page_cache(&$pages) {
2961	update_post_cache($pages);
2962	}
2963
2964	/**
2965	* Will clean the page in the cache.
2966	*
2967	* Clean (read: delete) page from cache that matches $id. Will also clean cache
2968	* associated with 'all_page_ids' and 'get_pages'.
2969	*
2970	* @package WordPress
2971	* @subpackage Cache
2972	* @since 2.0.0
2973	*
2974	* @uses do_action() Will call the 'clean_page_cache' hook action.
2975	*
2976	* @param int $id Page ID to clean
2977	*/
2978	function clean_page_cache($id) {
2979	clean_post_cache($id);
2980
2981	wp_cache_delete( 'all_page_ids', 'posts' );
2982	wp_cache_delete( 'get_pages', 'posts' );
2983
2984	do_action('clean_page_cache', $id);
2985	}
2986
2987	/**
2988	* Call major cache updating functions for list of Post objects.
2989	*
2990	* @package WordPress
2991	* @subpackage Cache
2992	* @since 1.5.0
2993	*
2994	* @uses $wpdb
2995	* @uses update_post_cache()
2996	* @uses update_object_term_cache()
2997	* @uses update_postmeta_cache()
2998	*
2999	* @param array $posts Array of Post objects
3000	*/
3001	function update_post_caches(&$posts) {
3002	// No point in doing all this work if we didn't match any posts.
3003	if ( !$posts )
3004	return;
3005
3006	update_post_cache($posts);
3007
3008	$post_ids = array();
3009
3010	for ($i = 0; $i < count($posts); $i++)
3011	$post_ids[] = $posts[$i]->ID;
3012
3013	update_object_term_cache($post_ids, 'post');
3014
3015	update_postmeta_cache($post_ids);
3016	}
3017
3018	/**
3019	* Updates metadata cache for list of post IDs.
3020	*
3021	* Performs SQL query to retrieve the metadata for the post IDs and updates the
3022	* metadata cache for the posts. Therefore, the functions, which call this
3023	* function, do not need to perform SQL queries on their own.
3024	*
3025	* @package WordPress
3026	* @subpackage Cache
3027	* @since 2.1.0
3028	*
3029	* @uses $wpdb
3030	*
3031	* @param array $post_ids List of post IDs.
3032	* @return bool\|array Returns false if there is nothing to update or an array of metadata.
3033	*/
3034	function update_postmeta_cache($post_ids) {
3035	global $wpdb;
3036
3037	if ( empty( $post_ids ) )
3038	return false;
3039
3040	if ( !is_array($post_ids) ) {
3041	$post_ids = preg_replace('\|[^0-9,]\|', '', $post_ids);
3042	$post_ids = explode(',', $post_ids);
3043	}
3044
3045	$post_ids = array_map('intval', $post_ids);
3046
3047	$ids = array();
3048	foreach ( (array) $post_ids as $id ) {
3049	if ( false === wp_cache_get($id, 'post_meta') )
3050	$ids[] = $id;
3051	}
3052
3053	if ( empty( $ids ) )
3054	return false;
3055
3056	// Get post-meta info
3057	$id_list = join(',', $ids);
3058	$cache = array();
3059	if ( $meta_list = $wpdb->get_results("SELECT post_id, meta_key, meta_value FROM $wpdb->postmeta WHERE post_id IN ($id_list)", ARRAY_A) ) {
3060	foreach ( (array) $meta_list as $metarow) {
3061	$mpid = (int) $metarow['post_id'];
3062	$mkey = $metarow['meta_key'];
3063	$mval = $metarow['meta_value'];
3064
3065	// Force subkeys to be array type:
3066	if ( !isset($cache[$mpid]) \|\| !is_array($cache[$mpid]) )
3067	$cache[$mpid] = array();
3068	if ( !isset($cache[$mpid][$mkey]) \|\| !is_array($cache[$mpid][$mkey]) )
3069	$cache[$mpid][$mkey] = array();
3070
3071	// Add a value to the current pid/key:
3072	$cache[$mpid][$mkey][] = $mval;
3073	}
3074	}
3075
3076	foreach ( (array) $ids as $id ) {
3077	if ( ! isset($cache[$id]) )
3078	$cache[$id] = array();
3079	}
3080
3081	foreach ( (array) array_keys($cache) as $post)
3082	wp_cache_set($post, $cache[$post], 'post_meta');
3083
3084	return $cache;
3085	}
3086
3087	//
3088	// Hooks
3089	//
3090
3091	/**
3092	* Hook for managing future post transitions to published.
3093	*
3094	* @since 2.3.0
3095	* @access private
3096	* @uses $wpdb
3097	*
3098	* @param string $new_status New post status
3099	* @param string $old_status Previous post status
3100	* @param object $post Object type containing the post information
3101	*/
3102	function _transition_post_status($new_status, $old_status, $post) {
3103	global $wpdb;
3104
3105	if ( $old_status != 'publish' && $new_status == 'publish' ) {
3106	// Reset GUID if transitioning to publish and it is empty
3107	if ( '' == get_the_guid($post->ID) )
3108	$wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
3109	do_action('private_to_published', $post->ID); // Deprecated, use private_to_publish
3110	}
3111
3112	// Always clears the hook in case the post status bounced from future to draft.
3113	wp_clear_scheduled_hook('publish_future_post', $post->ID);
3114	}
3115
3116	/**
3117	* Hook used to schedule publication for a post marked for the future.
3118	*
3119	* The $post properties used and must exist are 'ID' and 'post_date_gmt'.
3120	*
3121	* @since 2.3.0
3122	*
3123	* @param int $deprecated Not Used. Can be set to null.
3124	* @param object $post Object type containing the post information
3125	*/
3126	function _future_post_hook($deprecated = '', $post) {
3127	wp_clear_scheduled_hook( 'publish_future_post', $post->ID );
3128	wp_schedule_single_event(strtotime($post->post_date_gmt. ' GMT'), 'publish_future_post', array($post->ID));
3129	}
3130
3131	/**
3132	* Hook to schedule pings and enclosures when a post is published.
3133	*
3134	* @since 2.3.0
3135	* @uses $wpdb
3136	* @uses XMLRPC_REQUEST
3137	* @uses APP_REQUEST
3138	* @uses do_action Calls 'xmlprc_publish_post' action if XMLRPC_REQUEST is defined. Calls 'app_publish_post'
3139	* action if APP_REQUEST is defined.
3140	*
3141	* @param int $post_id The ID in the database table of the post being published
3142	*/
3143	function _publish_post_hook($post_id) {
3144	global $wpdb;
3145
3146	if ( defined('XMLRPC_REQUEST') )
3147	do_action('xmlrpc_publish_post', $post_id);
3148	if ( defined('APP_REQUEST') )
3149	do_action('app_publish_post', $post_id);
3150
3151	if ( defined('WP_IMPORTING') )
3152	return;
3153
3154	$data = array( 'post_id' => $post_id, 'meta_value' => '1' );
3155	if ( get_option('default_pingback_flag') )
3156	$wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_pingme' ) );
3157	$wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_encloseme' ) );
3158	wp_schedule_single_event(time(), 'do_pings');
3159	}
3160
3161	/**
3162	* Hook used to prevent page/post cache and rewrite rules from staying dirty.
3163	*
3164	* Does two things. If the post is a page and has a template then it will
3165	* update/add that template to the meta. For both pages and posts, it will clean
3166	* the post cache to make sure that the cache updates to the changes done
3167	* recently. For pages, the rewrite rules of WordPress are flushed to allow for
3168	* any changes.
3169	*
3170	* The $post parameter, only uses 'post_type' property and 'page_template'
3171	* property.
3172	*
3173	* @since 2.3.0
3174	* @uses $wp_rewrite Flushes Rewrite Rules.
3175	*
3176	* @param int $post_id The ID in the database table for the $post
3177	* @param object $post Object type containing the post information
3178	*/
3179	function _save_post_hook($post_id, $post) {
3180	if ( $post->post_type == 'page' ) {
3181	clean_page_cache($post_id);
3182	// Avoid flushing rules for every post during import.
3183	if ( !defined('WP_IMPORTING') ) {
3184	global $wp_rewrite;
3185	$wp_rewrite->flush_rules();
3186	}
3187	} else {
3188	clean_post_cache($post_id);
3189	}
3190	}
3191
3192	/**
3193	* Retrieve post ancestors and append to post ancestors property.
3194	*
3195	* Will only retrieve ancestors once, if property is already set, then nothing
3196	* will be done. If there is not a parent post, or post ID and post parent ID
3197	* are the same then nothing will be done.
3198	*
3199	* The parameter is passed by reference, so nothing needs to be returned. The
3200	* property will be updated and can be referenced after the function is
3201	* complete. The post parent will be an ancestor and the parent of the post
3202	* parent will be an ancestor. There will only be two ancestors at the most.
3203	*
3204	* @access private
3205	* @since unknown
3206	* @uses $wpdb
3207	*
3208	* @param object $_post Post data.
3209	* @return null When nothing needs to be done.
3210	*/
3211	function _get_post_ancestors(&$_post) {
3212	global $wpdb;
3213
3214	if ( isset($_post->ancestors) )
3215	return;
3216
3217	$_post->ancestors = array();
3218
3219	if ( empty($_post->post_parent) \|\| $_post->ID == $_post->post_parent )
3220	return;
3221
3222	$id = $_post->ancestors[] = $_post->post_parent;
3223	while ( $ancestor = $wpdb->get_var( $wpdb->prepare("SELECT `post_parent` FROM $wpdb->posts WHERE ID = %d LIMIT 1", $id) ) ) {
3224	if ( $id == $ancestor )
3225	break;
3226	$id = $_post->ancestors[] = $ancestor;
3227	}
3228	}
3229
3230	/**
3231	* Determines which fields of posts are to be saved in revisions.
3232	*
3233	* Does two things. If passed a post array, it will return a post array ready
3234	* to be insterted into the posts table as a post revision. Otherwise, returns
3235	* an array whose keys are the post fields to be saved for post revisions.
3236	*
3237	* @package WordPress
3238	* @subpackage Post_Revisions
3239	* @since 2.6.0
3240	* @access private
3241	*
3242	* @param array $post Optional a post array to be processed for insertion as a post revision.
3243	* @param bool $autosave optional Is the revision an autosave?
3244	* @return array Post array ready to be inserted as a post revision or array of fields that can be versioned.
3245	*/
3246	function _wp_post_revision_fields( $post = null, $autosave = false ) {
3247	static $fields = false;
3248
3249	if ( !$fields ) {
3250	// Allow these to be versioned
3251	$fields = array(
3252	'post_title' => __( 'Title' ),
3253	'post_content' => __( 'Content' ),
3254	'post_excerpt' => __( 'Excerpt' ),
3255	);
3256
3257	// Runs only once
3258	$fields = apply_filters( '_wp_post_revision_fields', $fields );
3259
3260	// WP uses these internally either in versioning or elsewhere - they cannot be versioned
3261	foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect )
3262	unset( $fields[$protect] );
3263	}
3264
3265	if ( !is_array($post) )
3266	return $fields;
3267
3268	$return = array();
3269	foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field )
3270	$return[$field] = $post[$field];
3271
3272	$return['post_parent'] = $post['ID'];
3273	$return['post_status'] = 'inherit';
3274	$return['post_type'] = 'revision';
3275	$return['post_name'] = $autosave ? "$post[ID]-autosave" : "$post[ID]-revision";
3276	$return['post_date'] = isset($post['post_modified']) ? $post['post_modified'] : '';
3277	$return['post_date_gmt'] = isset($post['post_modified_gmt']) ? $post['post_modified_gmt'] : '';
3278
3279	return $return;
3280	}
3281
3282	/**
3283	* Saves an already existing post as a post revision.
3284	*
3285	* Typically used immediately prior to post updates.
3286	*
3287	* @package WordPress
3288	* @subpackage Post_Revisions
3289	* @since 2.6.0
3290	*
3291	* @uses _wp_put_post_revision()
3292	*
3293	* @param int $post_id The ID of the post to save as a revision.
3294	* @return mixed Null or 0 if error, new revision ID, if success.
3295	*/
3296	function wp_save_post_revision( $post_id ) {
3297	// We do autosaves manually with wp_create_post_autosave()
3298	if ( @constant( 'DOING_AUTOSAVE' ) )
3299	return;
3300
3301	// WP_POST_REVISIONS = 0, false
3302	if ( !constant('WP_POST_REVISIONS') )
3303	return;
3304
3305	if ( !$post = get_post( $post_id, ARRAY_A ) )
3306	return;
3307
3308	if ( !in_array( $post['post_type'], array( 'post', 'page' ) ) )
3309	return;
3310
3311	$return = _wp_put_post_revision( $post );
3312
3313	// WP_POST_REVISIONS = true (default), -1
3314	if ( !is_numeric( WP_POST_REVISIONS ) \|\| WP_POST_REVISIONS < 0 )
3315	return $return;
3316
3317	// all revisions and (possibly) one autosave
3318	$revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) );
3319
3320	// WP_POST_REVISIONS = (int) (# of autasaves to save)
3321	$delete = count($revisions) - WP_POST_REVISIONS;
3322
3323	if ( $delete < 1 )
3324	return $return;
3325
3326	$revisions = array_slice( $revisions, 0, $delete );
3327
3328	for ( $i = 0; isset($revisions[$i]); $i++ ) {
3329	if ( false !== strpos( $revisions[$i]->post_name, 'autosave' ) )
3330	continue;
3331	wp_delete_post_revision( $revisions[$i]->ID );
3332	}
3333
3334	return $return;
3335	}
3336
3337	/**
3338	* Retrieve the autosaved data of the specified post.
3339	*
3340	* Returns a post object containing the information that was autosaved for the
3341	* specified post.
3342	*
3343	* @package WordPress
3344	* @subpackage Post_Revisions
3345	* @since 2.6.0
3346	*
3347	* @param int $post_id The post ID.
3348	* @return object\|bool The autosaved data or false on failure or when no autosave exists.
3349	*/
3350	function wp_get_post_autosave( $post_id ) {
3351
3352	if ( !$post = get_post( $post_id ) )
3353	return false;
3354
3355	$q = array(
3356	'name' => "{$post->ID}-autosave",
3357	'post_parent' => $post->ID,
3358	'post_type' => 'revision',
3359	'post_status' => 'inherit'
3360	);
3361
3362	// Use WP_Query so that the result gets cached
3363	$autosave_query = new WP_Query;
3364
3365	add_action( 'parse_query', '_wp_get_post_autosave_hack' );
3366	$autosave = $autosave_query->query( $q );
3367	remove_action( 'parse_query', '_wp_get_post_autosave_hack' );
3368
3369	if ( $autosave && is_array($autosave) && is_object($autosave[0]) )
3370	return $autosave[0];
3371
3372	return false;
3373	}
3374
3375	/**
3376	* Internally used to hack WP_Query into submission.
3377	*
3378	* @package WordPress
3379	* @subpackage Post_Revisions
3380	* @since 2.6.0
3381	*
3382	* @param object $query WP_Query object
3383	*/
3384	function _wp_get_post_autosave_hack( $query ) {
3385	$query->is_single = false;
3386	}
3387
3388	/**
3389	* Determines if the specified post is a revision.
3390	*
3391	* @package WordPress
3392	* @subpackage Post_Revisions
3393	* @since 2.6.0
3394	*
3395	* @param int\|object $post Post ID or post object.
3396	* @return bool\|int False if not a revision, ID of revision's parent otherwise.
3397	*/
3398	function wp_is_post_revision( $post ) {
3399	if ( !$post = wp_get_post_revision( $post ) )
3400	return false;
3401	return (int) $post->post_parent;
3402	}
3403
3404	/**
3405	* Determines if the specified post is an autosave.
3406	*
3407	* @package WordPress
3408	* @subpackage Post_Revisions
3409	* @since 2.6.0
3410	*
3411	* @param int\|object $post Post ID or post object.
3412	* @return bool\|int False if not a revision, ID of autosave's parent otherwise
3413	*/
3414	function wp_is_post_autosave( $post ) {
3415	if ( !$post = wp_get_post_revision( $post ) )
3416	return false;
3417	if ( "{$post->post_parent}-autosave" !== $post->post_name )
3418	return false;
3419	return (int) $post->post_parent;
3420	}
3421
3422	/**
3423	* Inserts post data into the posts table as a post revision.
3424	*
3425	* @package WordPress
3426	* @subpackage Post_Revisions
3427	* @since 2.6.0
3428	*
3429	* @uses wp_insert_post()
3430	*
3431	* @param int\|object\|array $post Post ID, post object OR post array.
3432	* @param bool $autosave Optional. Is the revision an autosave?
3433	* @return mixed Null or 0 if error, new revision ID if success.
3434	*/
3435	function _wp_put_post_revision( $post = null, $autosave = false ) {
3436	if ( is_object($post) )
3437	$post = get_object_vars( $post );
3438	elseif ( !is_array($post) )
3439	$post = get_post($post, ARRAY_A);
3440	if ( !$post \|\| empty($post['ID']) )
3441	return;
3442
3443	if ( isset($post['post_type']) && 'revision' == $post['post_type'] )
3444	return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
3445
3446	$post = _wp_post_revision_fields( $post, $autosave );
3447
3448	$revision_id = wp_insert_post( $post );
3449	if ( is_wp_error($revision_id) )
3450	return $revision_id;
3451
3452	if ( $revision_id )
3453	do_action( '_wp_put_post_revision', $revision_id );
3454	return $revision_id;
3455	}
3456
3457	/**
3458	* Gets a post revision.
3459	*
3460	* @package WordPress
3461	* @subpackage Post_Revisions
3462	* @since 2.6.0
3463	*
3464	* @uses get_post()
3465	*
3466	* @param int\|object $post Post ID or post object
3467	* @param string $output Optional. OBJECT, ARRAY_A, or ARRAY_N.
3468	* @param string $filter Optional sanitation filter. @see sanitize_post()
3469	* @return mixed Null if error or post object if success
3470	*/
3471	function &wp_get_post_revision(&$post, $output = OBJECT, $filter = 'raw') {
3472	$null = null;
3473	if ( !$revision = get_post( $post, OBJECT, $filter ) )
3474	return $revision;
3475	if ( 'revision' !== $revision->post_type )
3476	return $null;
3477
3478	if ( $output == OBJECT ) {
3479	return $revision;
3480	} elseif ( $output == ARRAY_A ) {
3481	$_revision = get_object_vars($revision);
3482	return $_revision;
3483	} elseif ( $output == ARRAY_N ) {
3484	$_revision = array_values(get_object_vars($revision));
3485	return $_revision;
3486	}
3487
3488	return $revision;
3489	}
3490
3491	/**
3492	* Restores a post to the specified revision.
3493	*
3494	* Can restore a past using all fields of the post revision, or only selected
3495	* fields.
3496	*
3497	* @package WordPress
3498	* @subpackage Post_Revisions
3499	* @since 2.6.0
3500	*
3501	* @uses wp_get_post_revision()
3502	* @uses wp_update_post()
3503	*
3504	* @param int\|object $revision_id Revision ID or revision object.
3505	* @param array $fields Optional. What fields to restore from. Defaults to all.
3506	* @return mixed Null if error, false if no fields to restore, (int) post ID if success.
3507	*/
3508	function wp_restore_post_revision( $revision_id, $fields = null ) {
3509	if ( !$revision = wp_get_post_revision( $revision_id, ARRAY_A ) )
3510	return $revision;
3511
3512	if ( !is_array( $fields ) )
3513	$fields = array_keys( _wp_post_revision_fields() );
3514
3515	$update = array();
3516	foreach( array_intersect( array_keys( $revision ), $fields ) as $field )
3517	$update[$field] = $revision[$field];
3518
3519	if ( !$update )
3520	return false;
3521
3522	$update['ID'] = $revision['post_parent'];
3523
3524	$post_id = wp_update_post( $update );
3525	if ( is_wp_error( $post_id ) )
3526	return $post_id;
3527
3528	if ( $post_id )
3529	do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] );
3530
3531	return $post_id;
3532	}
3533
3534	/**
3535	* Deletes a revision.
3536	*
3537	* Deletes the row from the posts table corresponding to the specified revision.
3538	*
3539	* @package WordPress
3540	* @subpackage Post_Revisions
3541	* @since 2.6.0
3542	*
3543	* @uses wp_get_post_revision()
3544	* @uses wp_delete_post()
3545	*
3546	* @param int\|object $revision_id Revision ID or revision object.
3547	* @param array $fields Optional. What fields to restore from. Defaults to all.
3548	* @return mixed Null if error, false if no fields to restore, (int) post ID if success.
3549	*/
3550	function wp_delete_post_revision( $revision_id ) {
3551	if ( !$revision = wp_get_post_revision( $revision_id ) )
3552	return $revision;
3553
3554	$delete = wp_delete_post( $revision->ID );
3555	if ( is_wp_error( $delete ) )
3556	return $delete;
3557
3558	if ( $delete )
3559	do_action( 'wp_delete_post_revision', $revision->ID, $revision );
3560
3561	return $delete;
3562	}
3563
3564	/**
3565	* Returns all revisions of specified post.
3566	*
3567	* @package WordPress
3568	* @subpackage Post_Revisions
3569	* @since 2.6.0
3570	*
3571	* @uses get_children()
3572	*
3573	* @param int\|object $post_id Post ID or post object
3574	* @return array empty if no revisions
3575	*/
3576	function wp_get_post_revisions( $post_id = 0, $args = null ) {
3577	if ( !constant('WP_POST_REVISIONS') )
3578	return array();
3579	if ( ( !$post = get_post( $post_id ) ) \|\| empty( $post->ID ) )
3580	return array();
3581
3582	$defaults = array( 'order' => 'DESC', 'orderby' => 'date' );
3583	$args = wp_parse_args( $args, $defaults );
3584	$args = array_merge( $args, array( 'post_parent' => $post->ID, 'post_type' => 'revision', 'post_status' => 'inherit' ) );
3585
3586	if ( !$revisions = get_children( $args ) )
3587	return array();
3588	return $revisions;
3589	}
3590
3591	function _set_preview($post) {
3592
3593	if ( ! is_object($post) )
3594	return $post;
3595
3596	$preview = wp_get_post_autosave($post->ID);
3597
3598	if ( ! is_object($preview) )
3599	return $post;
3600
3601	$preview = sanitize_post($preview);
3602
3603	$post->post_content = $preview->post_content;
3604	$post->post_title = $preview->post_title;
3605	$post->post_excerpt = $preview->post_excerpt;
3606
3607	return $post;
3608	}
3609
3610	function _show_post_preview() {
3611
3612	if ( isset($_GET['preview_id']) && isset($_GET['preview_nonce']) ) {
3613	$id = (int) $_GET['preview_id'];
3614
3615	if ( false == wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . $id ) )
3616	wp_die( __('You do not have permission to preview drafts.') );
3617
3618	add_filter('the_preview', '_set_preview');
3619	}
3620	}