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Ticket #29894: taxonomy.php

File taxonomy.php, 128.4 KB (added by webgeekconsulting, 11 years ago)
Patch for get_terms() not caching correctly

Line
1	<?php
2	/**
3	* Taxonomy API
4	*
5	* @package WordPress
6	* @subpackage Taxonomy
7	* @since 2.3.0
8	*/
9
10	//
11	// Taxonomy Registration
12	//
13
14	/**
15	* Creates the initial taxonomies.
16	*
17	* This function fires twice: in wp-settings.php before plugins are loaded (for
18	* backwards compatibility reasons), and again on the 'init' action. We must avoid
19	* registering rewrite rules before the 'init' action.
20	*/
21	function create_initial_taxonomies() {
22	global $wp_rewrite;
23
24	if ( ! did_action( 'init' ) ) {
25	$rewrite = array( 'category' => false, 'post_tag' => false, 'post_format' => false );
26	} else {
27
28	/**
29	* Filter the post formats rewrite base.
30	*
31	* @since 3.1.0
32	*
33	* @param string $context Context of the rewrite base. Default 'type'.
34	*/
35	$post_format_base = apply_filters( 'post_format_rewrite_base', 'type' );
36	$rewrite = array(
37	'category' => array(
38	'hierarchical' => true,
39	'slug' => get_option('category_base') ? get_option('category_base') : 'category',
40	'with_front' => ! get_option('category_base') \|\| $wp_rewrite->using_index_permalinks(),
41	'ep_mask' => EP_CATEGORIES,
42	),
43	'post_tag' => array(
44	'slug' => get_option('tag_base') ? get_option('tag_base') : 'tag',
45	'with_front' => ! get_option('tag_base') \|\| $wp_rewrite->using_index_permalinks(),
46	'ep_mask' => EP_TAGS,
47	),
48	'post_format' => $post_format_base ? array( 'slug' => $post_format_base ) : false,
49	);
50	}
51
52	register_taxonomy( 'category', 'post', array(
53	'hierarchical' => true,
54	'query_var' => 'category_name',
55	'rewrite' => $rewrite['category'],
56	'public' => true,
57	'show_ui' => true,
58	'show_admin_column' => true,
59	'_builtin' => true,
60	) );
61
62	register_taxonomy( 'post_tag', 'post', array(
63	'hierarchical' => false,
64	'query_var' => 'tag',
65	'rewrite' => $rewrite['post_tag'],
66	'public' => true,
67	'show_ui' => true,
68	'show_admin_column' => true,
69	'_builtin' => true,
70	) );
71
72	register_taxonomy( 'nav_menu', 'nav_menu_item', array(
73	'public' => false,
74	'hierarchical' => false,
75	'labels' => array(
76	'name' => __( 'Navigation Menus' ),
77	'singular_name' => __( 'Navigation Menu' ),
78	),
79	'query_var' => false,
80	'rewrite' => false,
81	'show_ui' => false,
82	'_builtin' => true,
83	'show_in_nav_menus' => false,
84	) );
85
86	register_taxonomy( 'link_category', 'link', array(
87	'hierarchical' => false,
88	'labels' => array(
89	'name' => __( 'Link Categories' ),
90	'singular_name' => __( 'Link Category' ),
91	'search_items' => __( 'Search Link Categories' ),
92	'popular_items' => null,
93	'all_items' => __( 'All Link Categories' ),
94	'edit_item' => __( 'Edit Link Category' ),
95	'update_item' => __( 'Update Link Category' ),
96	'add_new_item' => __( 'Add New Link Category' ),
97	'new_item_name' => __( 'New Link Category Name' ),
98	'separate_items_with_commas' => null,
99	'add_or_remove_items' => null,
100	'choose_from_most_used' => null,
101	),
102	'capabilities' => array(
103	'manage_terms' => 'manage_links',
104	'edit_terms' => 'manage_links',
105	'delete_terms' => 'manage_links',
106	'assign_terms' => 'manage_links',
107	),
108	'query_var' => false,
109	'rewrite' => false,
110	'public' => false,
111	'show_ui' => false,
112	'_builtin' => true,
113	) );
114
115	register_taxonomy( 'post_format', 'post', array(
116	'public' => true,
117	'hierarchical' => false,
118	'labels' => array(
119	'name' => _x( 'Format', 'post format' ),
120	'singular_name' => _x( 'Format', 'post format' ),
121	),
122	'query_var' => true,
123	'rewrite' => $rewrite['post_format'],
124	'show_ui' => false,
125	'_builtin' => true,
126	'show_in_nav_menus' => current_theme_supports( 'post-formats' ),
127	) );
128	}
129	add_action( 'init', 'create_initial_taxonomies', 0 ); // highest priority
130
131	/**
132	* Get a list of registered taxonomy objects.
133	*
134	* @since 3.0.0
135	* @uses $wp_taxonomies
136	* @see register_taxonomy
137	*
138	* @param array $args An array of key => value arguments to match against the taxonomy objects.
139	* @param string $output The type of output to return, either taxonomy 'names' or 'objects'. 'names' is the default.
140	* @param string $operator The logical operation to perform. 'or' means only one element
141	* from the array needs to match; 'and' means all elements must match. The default is 'and'.
142	* @return array A list of taxonomy names or objects
143	*/
144	function get_taxonomies( $args = array(), $output = 'names', $operator = 'and' ) {
145	global $wp_taxonomies;
146
147	$field = ('names' == $output) ? 'name' : false;
148
149	return wp_filter_object_list($wp_taxonomies, $args, $operator, $field);
150	}
151
152	/**
153	* Return all of the taxonomy names that are of $object_type.
154	*
155	* It appears that this function can be used to find all of the names inside of
156	* $wp_taxonomies global variable.
157	*
158	* <code><?php $taxonomies = get_object_taxonomies('post'); ?></code> Should
159	* result in <code>Array('category', 'post_tag')</code>
160	*
161	* @since 2.3.0
162	*
163	* @uses $wp_taxonomies
164	*
165	* @param array\|string\|object $object Name of the type of taxonomy object, or an object (row from posts)
166	* @param string $output The type of output to return, either taxonomy 'names' or 'objects'. 'names' is the default.
167	* @return array The names of all taxonomy of $object_type.
168	*/
169	function get_object_taxonomies($object, $output = 'names') {
170	global $wp_taxonomies;
171
172	if ( is_object($object) ) {
173	if ( $object->post_type == 'attachment' )
174	return get_attachment_taxonomies($object);
175	$object = $object->post_type;
176	}
177
178	$object = (array) $object;
179
180	$taxonomies = array();
181	foreach ( (array) $wp_taxonomies as $tax_name => $tax_obj ) {
182	if ( array_intersect($object, (array) $tax_obj->object_type) ) {
183	if ( 'names' == $output )
184	$taxonomies[] = $tax_name;
185	else
186	$taxonomies[ $tax_name ] = $tax_obj;
187	}
188	}
189
190	return $taxonomies;
191	}
192
193	/**
194	* Retrieves the taxonomy object of $taxonomy.
195	*
196	* The get_taxonomy function will first check that the parameter string given
197	* is a taxonomy object and if it is, it will return it.
198	*
199	* @since 2.3.0
200	*
201	* @uses $wp_taxonomies
202	* @uses taxonomy_exists() Checks whether taxonomy exists
203	*
204	* @param string $taxonomy Name of taxonomy object to return
205	* @return object\|bool The Taxonomy Object or false if $taxonomy doesn't exist
206	*/
207	function get_taxonomy( $taxonomy ) {
208	global $wp_taxonomies;
209
210	if ( ! taxonomy_exists( $taxonomy ) )
211	return false;
212
213	return $wp_taxonomies[$taxonomy];
214	}
215
216	/**
217	* Checks that the taxonomy name exists.
218	*
219	* Formerly is_taxonomy(), introduced in 2.3.0.
220	*
221	* @since 3.0.0
222	*
223	* @uses $wp_taxonomies
224	*
225	* @param string $taxonomy Name of taxonomy object
226	* @return bool Whether the taxonomy exists.
227	*/
228	function taxonomy_exists( $taxonomy ) {
229	global $wp_taxonomies;
230
231	return isset( $wp_taxonomies[$taxonomy] );
232	}
233
234	/**
235	* Whether the taxonomy object is hierarchical.
236	*
237	* Checks to make sure that the taxonomy is an object first. Then Gets the
238	* object, and finally returns the hierarchical value in the object.
239	*
240	* A false return value might also mean that the taxonomy does not exist.
241	*
242	* @since 2.3.0
243	*
244	* @uses taxonomy_exists() Checks whether taxonomy exists
245	* @uses get_taxonomy() Used to get the taxonomy object
246	*
247	* @param string $taxonomy Name of taxonomy object
248	* @return bool Whether the taxonomy is hierarchical
249	*/
250	function is_taxonomy_hierarchical($taxonomy) {
251	if ( ! taxonomy_exists($taxonomy) )
252	return false;
253
254	$taxonomy = get_taxonomy($taxonomy);
255	return $taxonomy->hierarchical;
256	}
257
258	/**
259	* Create or modify a taxonomy object. Do not use before init.
260	*
261	* A simple function for creating or modifying a taxonomy object based on the
262	* parameters given. The function will accept an array (third optional
263	* parameter), along with strings for the taxonomy name and another string for
264	* the object type.
265	*
266	* Nothing is returned, so expect error maybe or use taxonomy_exists() to check
267	* whether taxonomy exists.
268	*
269	* Optional $args contents:
270	*
271	* - label - Name of the taxonomy shown in the menu. Usually plural. If not set, labels['name'] will be used.
272	* - labels - An array of labels for this taxonomy.
273	* * By default tag labels are used for non-hierarchical types and category labels for hierarchical ones.
274	* * You can see accepted values in {@link get_taxonomy_labels()}.
275	* - description - A short descriptive summary of what the taxonomy is for. Defaults to blank.
276	* - public - If the taxonomy should be publicly queryable; //@TODO not implemented.
277	* * Defaults to true.
278	* - hierarchical - Whether the taxonomy is hierarchical (e.g. category). Defaults to false.
279	* - show_ui - Whether to generate a default UI for managing this taxonomy in the admin.
280	* * If not set, the default is inherited from public.
281	* - show_in_menu - Whether to show the taxonomy in the admin menu.
282	* * If true, the taxonomy is shown as a submenu of the object type menu.
283	* * If false, no menu is shown.
284	* * show_ui must be true.
285	* * If not set, the default is inherited from show_ui.
286	* - show_in_nav_menus - Makes this taxonomy available for selection in navigation menus.
287	* * If not set, the default is inherited from public.
288	* - show_tagcloud - Whether to list the taxonomy in the Tag Cloud Widget.
289	* * If not set, the default is inherited from show_ui.
290	* - show_admin_column - Whether to display a column for the taxonomy on its post type listing screens.
291	* * Defaults to false.
292	* - meta_box_cb - Provide a callback function for the meta box display.
293	* * If not set, defaults to post_categories_meta_box for hierarchical taxonomies
294	* and post_tags_meta_box for non-hierarchical.
295	* * If false, no meta box is shown.
296	* - capabilities - Array of capabilities for this taxonomy.
297	* * You can see accepted values in this function.
298	* - rewrite - Triggers the handling of rewrites for this taxonomy. Defaults to true, using $taxonomy as slug.
299	* * To prevent rewrite, set to false.
300	* * To specify rewrite rules, an array can be passed with any of these keys
301	* * 'slug' => string Customize the permastruct slug. Defaults to $taxonomy key
302	* * 'with_front' => bool Should the permastruct be prepended with WP_Rewrite::$front. Defaults to true.
303	* * 'hierarchical' => bool Either hierarchical rewrite tag or not. Defaults to false.
304	* * 'ep_mask' => const Assign an endpoint mask.
305	* * If not specified, defaults to EP_NONE.
306	* - query_var - Sets the query_var key for this taxonomy. Defaults to $taxonomy key
307	* * If false, a taxonomy cannot be loaded at ?{query_var}={term_slug}
308	* * If specified as a string, the query ?{query_var_string}={term_slug} will be valid.
309	* - update_count_callback - Works much like a hook, in that it will be called when the count is updated.
310	* * Defaults to _update_post_term_count() for taxonomies attached to post types, which then confirms
311	* that the objects are published before counting them.
312	* * Defaults to _update_generic_term_count() for taxonomies attached to other object types, such as links.
313	* - _builtin - true if this taxonomy is a native or "built-in" taxonomy. THIS IS FOR INTERNAL USE ONLY!
314	*
315	* @since 2.3.0
316	* @uses $wp_taxonomies Inserts new taxonomy object into the list
317	* @uses $wp Adds query vars
318	*
319	* @param string $taxonomy Taxonomy key, must not exceed 32 characters.
320	* @param array\|string $object_type Name of the object type for the taxonomy object.
321	* @param array\|string $args See optional args description above.
322	* @return null\|WP_Error WP_Error if errors, otherwise null.
323	*/
324	function register_taxonomy( $taxonomy, $object_type, $args = array() ) {
325	global $wp_taxonomies, $wp;
326
327	if ( ! is_array( $wp_taxonomies ) )
328	$wp_taxonomies = array();
329
330	$defaults = array(
331	'labels' => array(),
332	'description' => '',
333	'public' => true,
334	'hierarchical' => false,
335	'show_ui' => null,
336	'show_in_menu' => null,
337	'show_in_nav_menus' => null,
338	'show_tagcloud' => null,
339	'show_admin_column' => false,
340	'meta_box_cb' => null,
341	'capabilities' => array(),
342	'rewrite' => true,
343	'query_var' => $taxonomy,
344	'update_count_callback' => '',
345	'_builtin' => false,
346	);
347	$args = wp_parse_args( $args, $defaults );
348
349	if ( strlen( $taxonomy ) > 32 ) {
350	_doing_it_wrong( __FUNCTION__, __( 'Taxonomies cannot exceed 32 characters in length' ), '4.0' );
351	return new WP_Error( 'taxonomy_too_long', __( 'Taxonomies cannot exceed 32 characters in length' ) );
352	}
353
354	if ( false !== $args['query_var'] && ! empty( $wp ) ) {
355	if ( true === $args['query_var'] )
356	$args['query_var'] = $taxonomy;
357	else
358	$args['query_var'] = sanitize_title_with_dashes( $args['query_var'] );
359	$wp->add_query_var( $args['query_var'] );
360	}
361
362	if ( false !== $args['rewrite'] && ( is_admin() \|\| '' != get_option( 'permalink_structure' ) ) ) {
363	$args['rewrite'] = wp_parse_args( $args['rewrite'], array(
364	'with_front' => true,
365	'hierarchical' => false,
366	'ep_mask' => EP_NONE,
367	) );
368
369	if ( empty( $args['rewrite']['slug'] ) )
370	$args['rewrite']['slug'] = sanitize_title_with_dashes( $taxonomy );
371
372	if ( $args['hierarchical'] && $args['rewrite']['hierarchical'] )
373	$tag = '(.+?)';
374	else
375	$tag = '([^/]+)';
376
377	add_rewrite_tag( "%$taxonomy%", $tag, $args['query_var'] ? "{$args['query_var']}=" : "taxonomy=$taxonomy&term=" );
378	add_permastruct( $taxonomy, "{$args['rewrite']['slug']}/%$taxonomy%", $args['rewrite'] );
379	}
380
381	// If not set, default to the setting for public.
382	if ( null === $args['show_ui'] )
383	$args['show_ui'] = $args['public'];
384
385	// If not set, default to the setting for show_ui.
386	if ( null === $args['show_in_menu' ] \|\| ! $args['show_ui'] )
387	$args['show_in_menu' ] = $args['show_ui'];
388
389	// If not set, default to the setting for public.
390	if ( null === $args['show_in_nav_menus'] )
391	$args['show_in_nav_menus'] = $args['public'];
392
393	// If not set, default to the setting for show_ui.
394	if ( null === $args['show_tagcloud'] )
395	$args['show_tagcloud'] = $args['show_ui'];
396
397	$default_caps = array(
398	'manage_terms' => 'manage_categories',
399	'edit_terms' => 'manage_categories',
400	'delete_terms' => 'manage_categories',
401	'assign_terms' => 'edit_posts',
402	);
403	$args['cap'] = (object) array_merge( $default_caps, $args['capabilities'] );
404	unset( $args['capabilities'] );
405
406	$args['name'] = $taxonomy;
407	$args['object_type'] = array_unique( (array) $object_type );
408
409	$args['labels'] = get_taxonomy_labels( (object) $args );
410	$args['label'] = $args['labels']->name;
411
412	// If not set, use the default meta box
413	if ( null === $args['meta_box_cb'] ) {
414	if ( $args['hierarchical'] )
415	$args['meta_box_cb'] = 'post_categories_meta_box';
416	else
417	$args['meta_box_cb'] = 'post_tags_meta_box';
418	}
419
420	$wp_taxonomies[ $taxonomy ] = (object) $args;
421
422	// register callback handling for metabox
423	add_filter( 'wp_ajax_add-' . $taxonomy, '_wp_ajax_add_hierarchical_term' );
424
425	/**
426	* Fires after a taxonomy is registered.
427	*
428	* @since 3.3.0
429	*
430	* @param string $taxonomy Taxonomy slug.
431	* @param array\|string $object_type Object type or array of object types.
432	* @param array $args Array of taxonomy registration arguments.
433	*/
434	do_action( 'registered_taxonomy', $taxonomy, $object_type, $args );
435	}
436
437	/**
438	* Builds an object with all taxonomy labels out of a taxonomy object
439	*
440	* Accepted keys of the label array in the taxonomy object:
441	* - name - general name for the taxonomy, usually plural. The same as and overridden by $tax->label. Default is Tags/Categories
442	* - singular_name - name for one object of this taxonomy. Default is Tag/Category
443	* - search_items - Default is Search Tags/Search Categories
444	* - popular_items - This string isn't used on hierarchical taxonomies. Default is Popular Tags
445	* - all_items - Default is All Tags/All Categories
446	* - parent_item - This string isn't used on non-hierarchical taxonomies. In hierarchical ones the default is Parent Category
447	* - parent_item_colon - The same as <code>parent_item</code>, but with colon <code>:</code> in the end
448	* - edit_item - Default is Edit Tag/Edit Category
449	* - view_item - Default is View Tag/View Category
450	* - update_item - Default is Update Tag/Update Category
451	* - add_new_item - Default is Add New Tag/Add New Category
452	* - new_item_name - Default is New Tag Name/New Category Name
453	* - separate_items_with_commas - This string isn't used on hierarchical taxonomies. Default is "Separate tags with commas", used in the meta box.
454	* - add_or_remove_items - This string isn't used on hierarchical taxonomies. Default is "Add or remove tags", used in the meta box when JavaScript is disabled.
455	* - choose_from_most_used - This string isn't used on hierarchical taxonomies. Default is "Choose from the most used tags", used in the meta box.
456	* - not_found - This string isn't used on hierarchical taxonomies. Default is "No tags found", used in the meta box.
457	*
458	* Above, the first default value is for non-hierarchical taxonomies (like tags) and the second one is for hierarchical taxonomies (like categories).
459	*
460	* @since 3.0.0
461	* @param object $tax Taxonomy object
462	* @return object object with all the labels as member variables
463	*/
464
465	function get_taxonomy_labels( $tax ) {
466	$tax->labels = (array) $tax->labels;
467
468	if ( isset( $tax->helps ) && empty( $tax->labels['separate_items_with_commas'] ) )
469	$tax->labels['separate_items_with_commas'] = $tax->helps;
470
471	if ( isset( $tax->no_tagcloud ) && empty( $tax->labels['not_found'] ) )
472	$tax->labels['not_found'] = $tax->no_tagcloud;
473
474	$nohier_vs_hier_defaults = array(
475	'name' => array( _x( 'Tags', 'taxonomy general name' ), _x( 'Categories', 'taxonomy general name' ) ),
476	'singular_name' => array( _x( 'Tag', 'taxonomy singular name' ), _x( 'Category', 'taxonomy singular name' ) ),
477	'search_items' => array( __( 'Search Tags' ), __( 'Search Categories' ) ),
478	'popular_items' => array( __( 'Popular Tags' ), null ),
479	'all_items' => array( __( 'All Tags' ), __( 'All Categories' ) ),
480	'parent_item' => array( null, __( 'Parent Category' ) ),
481	'parent_item_colon' => array( null, __( 'Parent Category:' ) ),
482	'edit_item' => array( __( 'Edit Tag' ), __( 'Edit Category' ) ),
483	'view_item' => array( __( 'View Tag' ), __( 'View Category' ) ),
484	'update_item' => array( __( 'Update Tag' ), __( 'Update Category' ) ),
485	'add_new_item' => array( __( 'Add New Tag' ), __( 'Add New Category' ) ),
486	'new_item_name' => array( __( 'New Tag Name' ), __( 'New Category Name' ) ),
487	'separate_items_with_commas' => array( __( 'Separate tags with commas' ), null ),
488	'add_or_remove_items' => array( __( 'Add or remove tags' ), null ),
489	'choose_from_most_used' => array( __( 'Choose from the most used tags' ), null ),
490	'not_found' => array( __( 'No tags found.' ), null ),
491	);
492	$nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];
493
494	return _get_custom_object_labels( $tax, $nohier_vs_hier_defaults );
495	}
496
497	/**
498	* Add an already registered taxonomy to an object type.
499	*
500	* @since 3.0.0
501	* @uses $wp_taxonomies Modifies taxonomy object
502	*
503	* @param string $taxonomy Name of taxonomy object
504	* @param string $object_type Name of the object type
505	* @return bool True if successful, false if not
506	*/
507	function register_taxonomy_for_object_type( $taxonomy, $object_type) {
508	global $wp_taxonomies;
509
510	if ( !isset($wp_taxonomies[$taxonomy]) )
511	return false;
512
513	if ( ! get_post_type_object($object_type) )
514	return false;
515
516	if ( ! in_array( $object_type, $wp_taxonomies[$taxonomy]->object_type ) )
517	$wp_taxonomies[$taxonomy]->object_type[] = $object_type;
518
519	return true;
520	}
521
522	/**
523	* Remove an already registered taxonomy from an object type.
524	*
525	* @since 3.7.0
526	*
527	* @param string $taxonomy Name of taxonomy object.
528	* @param string $object_type Name of the object type.
529	* @return bool True if successful, false if not.
530	*/
531	function unregister_taxonomy_for_object_type( $taxonomy, $object_type ) {
532	global $wp_taxonomies;
533
534	if ( ! isset( $wp_taxonomies[ $taxonomy ] ) )
535	return false;
536
537	if ( ! get_post_type_object( $object_type ) )
538	return false;
539
540	$key = array_search( $object_type, $wp_taxonomies[ $taxonomy ]->object_type, true );
541	if ( false === $key )
542	return false;
543
544	unset( $wp_taxonomies[ $taxonomy ]->object_type[ $key ] );
545	return true;
546	}
547
548	//
549	// Term API
550	//
551
552	/**
553	* Retrieve object_ids of valid taxonomy and term.
554	*
555	* The strings of $taxonomies must exist before this function will continue. On
556	* failure of finding a valid taxonomy, it will return an WP_Error class, kind
557	* of like Exceptions in PHP 5, except you can't catch them. Even so, you can
558	* still test for the WP_Error class and get the error message.
559	*
560	* The $terms aren't checked the same as $taxonomies, but still need to exist
561	* for $object_ids to be returned.
562	*
563	* It is possible to change the order that object_ids is returned by either
564	* using PHP sort family functions or using the database by using $args with
565	* either ASC or DESC array. The value should be in the key named 'order'.
566	*
567	* @since 2.3.0
568	*
569	* @uses $wpdb
570	* @uses wp_parse_args() Creates an array from string $args.
571	*
572	* @param int\|array $term_ids Term id or array of term ids of terms that will be used
573	* @param string\|array $taxonomies String of taxonomy name or Array of string values of taxonomy names
574	* @param array\|string $args Change the order of the object_ids, either ASC or DESC
575	* @return WP_Error\|array If the taxonomy does not exist, then WP_Error will be returned. On success
576	* the array can be empty meaning that there are no $object_ids found or it will return the $object_ids found.
577	*/
578	function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) {
579	global $wpdb;
580
581	if ( ! is_array( $term_ids ) ) {
582	$term_ids = array( $term_ids );
583	}
584	if ( ! is_array( $taxonomies ) ) {
585	$taxonomies = array( $taxonomies );
586	}
587	foreach ( (array) $taxonomies as $taxonomy ) {
588	if ( ! taxonomy_exists( $taxonomy ) ) {
589	return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy' ) );
590	}
591	}
592
593	$defaults = array( 'order' => 'ASC' );
594	$args = wp_parse_args( $args, $defaults );
595
596	$order = ( 'desc' == strtolower( $args['order'] ) ) ? 'DESC' : 'ASC';
597
598	$term_ids = array_map('intval', $term_ids );
599
600	$taxonomies = "'" . implode( "', '", $taxonomies ) . "'";
601	$term_ids = "'" . implode( "', '", $term_ids ) . "'";
602
603	$object_ids = $wpdb->get_col("SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tt.term_id IN ($term_ids) ORDER BY tr.object_id $order");
604
605	if ( ! $object_ids ){
606	return array();
607	}
608	return $object_ids;
609	}
610
611	/**
612	* Given a taxonomy query, generates SQL to be appended to a main query.
613	*
614	* @since 3.1.0
615	*
616	* @see WP_Tax_Query
617	*
618	* @param array $tax_query A compact tax query
619	* @param string $primary_table
620	* @param string $primary_id_column
621	* @return array
622	*/
623	function get_tax_sql( $tax_query, $primary_table, $primary_id_column ) {
624	$tax_query_obj = new WP_Tax_Query( $tax_query );
625	return $tax_query_obj->get_sql( $primary_table, $primary_id_column );
626	}
627
628	/**
629	* Container class for a multiple taxonomy query.
630	*
631	* @since 3.1.0
632	*/
633	class WP_Tax_Query {
634
635	/**
636	* List of taxonomy queries. A single taxonomy query is an associative array:
637	* - 'taxonomy' string The taxonomy being queried. Optional when using the term_taxonomy_id field.
638	* - 'terms' string\|array The list of terms
639	* - 'field' string (optional) Which term field is being used.
640	* Possible values: 'term_id', 'slug', 'name', or 'term_taxonomy_id'
641	* Default: 'term_id'
642	* - 'operator' string (optional)
643	* Possible values: 'AND', 'IN' or 'NOT IN'.
644	* Default: 'IN'
645	* - 'include_children' bool (optional) Whether to include child terms. Requires that a taxonomy be specified.
646	* Default: true
647	*
648	* @since 3.1.0
649	* @access public
650	* @var array
651	*/
652	public $queries = array();
653
654	/**
655	* The relation between the queries. Can be one of 'AND' or 'OR'.
656	*
657	* @since 3.1.0
658	* @access public
659	* @var string
660	*/
661	public $relation;
662
663	/**
664	* Standard response when the query should not return any rows.
665	*
666	* @since 3.2.0
667	* @access private
668	* @var string
669	*/
670	private static $no_results = array( 'join' => '', 'where' => ' AND 0 = 1' );
671
672	/**
673	* Constructor.
674	*
675	* Parses a compact tax query and sets defaults.
676	*
677	* @since 3.1.0
678	* @access public
679	*
680	* @param array $tax_query A compact tax query:
681	* array(
682	* 'relation' => 'OR',
683	* array(
684	* 'taxonomy' => 'tax1',
685	* 'terms' => array( 'term1', 'term2' ),
686	* 'field' => 'slug',
687	* ),
688	* array(
689	* 'taxonomy' => 'tax2',
690	* 'terms' => array( 'term-a', 'term-b' ),
691	* 'field' => 'slug',
692	* ),
693	* )
694	*/
695	public function __construct( $tax_query ) {
696	if ( isset( $tax_query['relation'] ) && strtoupper( $tax_query['relation'] ) == 'OR' ) {
697	$this->relation = 'OR';
698	} else {
699	$this->relation = 'AND';
700	}
701
702	$defaults = array(
703	'taxonomy' => '',
704	'terms' => array(),
705	'include_children' => true,
706	'field' => 'term_id',
707	'operator' => 'IN',
708	);
709
710	foreach ( $tax_query as $query ) {
711	if ( ! is_array( $query ) )
712	continue;
713
714	$query = array_merge( $defaults, $query );
715
716	$query['terms'] = (array) $query['terms'];
717
718	$this->queries[] = $query;
719	}
720	}
721
722	/**
723	* Generates SQL clauses to be appended to a main query.
724	*
725	* @since 3.1.0
726	* @access public
727	*
728	* @param string $primary_table
729	* @param string $primary_id_column
730	* @return array
731	*/
732	public function get_sql( $primary_table, $primary_id_column ) {
733	global $wpdb;
734
735	$join = '';
736	$where = array();
737	$i = 0;
738	$count = count( $this->queries );
739
740	foreach ( $this->queries as $index => $query ) {
741	$this->clean_query( $query );
742
743	if ( is_wp_error( $query ) ) {
744	return self::$no_results;
745	}
746
747	$terms = $query['terms'];
748	$operator = strtoupper( $query['operator'] );
749
750	if ( 'IN' == $operator ) {
751
752	if ( empty( $terms ) ) {
753	if ( 'OR' == $this->relation ) {
754	if ( ( $index + 1 === $count ) && empty( $where ) ) {
755	return self::$no_results;
756	}
757	continue;
758	} else {
759	return self::$no_results;
760	}
761	}
762
763	$terms = implode( ',', $terms );
764
765	$alias = $i ? 'tt' . $i : $wpdb->term_relationships;
766
767	$join .= " INNER JOIN $wpdb->term_relationships";
768	$join .= $i ? " AS $alias" : '';
769	$join .= " ON ($primary_table.$primary_id_column = $alias.object_id)";
770
771	$where[] = "$alias.term_taxonomy_id $operator ($terms)";
772	} elseif ( 'NOT IN' == $operator ) {
773
774	if ( empty( $terms ) ) {
775	continue;
776	}
777
778	$terms = implode( ',', $terms );
779
780	$where[] = "$primary_table.$primary_id_column NOT IN (
781	SELECT object_id
782	FROM $wpdb->term_relationships
783	WHERE term_taxonomy_id IN ($terms)
784	)";
785	} elseif ( 'AND' == $operator ) {
786
787	if ( empty( $terms ) ) {
788	continue;
789	}
790
791	$num_terms = count( $terms );
792
793	$terms = implode( ',', $terms );
794
795	$where[] = "(
796	SELECT COUNT(1)
797	FROM $wpdb->term_relationships
798	WHERE term_taxonomy_id IN ($terms)
799	AND object_id = $primary_table.$primary_id_column
800	) = $num_terms";
801	}
802
803	$i++;
804	}
805
806	if ( ! empty( $where ) ) {
807	$where = ' AND ( ' . implode( " $this->relation ", $where ) . ' )';
808	} else {
809	$where = '';
810	}
811	return compact( 'join', 'where' );
812	}
813
814	/**
815	* Validates a single query.
816	*
817	* @since 3.2.0
818	* @access private
819	*
820	* @param array &$query The single query
821	*/
822	private function clean_query( &$query ) {
823	if ( empty( $query['taxonomy'] ) ) {
824	if ( 'term_taxonomy_id' !== $query['field'] ) {
825	$query = new WP_Error( 'Invalid taxonomy' );
826	return;
827	}
828
829	// so long as there are shared terms, include_children requires that a taxonomy is set
830	$query['include_children'] = false;
831	} elseif ( ! taxonomy_exists( $query['taxonomy'] ) ) {
832	$query = new WP_Error( 'Invalid taxonomy' );
833	return;
834	}
835
836	$query['terms'] = array_unique( (array) $query['terms'] );
837
838	if ( is_taxonomy_hierarchical( $query['taxonomy'] ) && $query['include_children'] ) {
839	$this->transform_query( $query, 'term_id' );
840
841	if ( is_wp_error( $query ) )
842	return;
843
844	$children = array();
845	foreach ( $query['terms'] as $term ) {
846	$children = array_merge( $children, get_term_children( $term, $query['taxonomy'] ) );
847	$children[] = $term;
848	}
849	$query['terms'] = $children;
850	}
851
852	$this->transform_query( $query, 'term_taxonomy_id' );
853	}
854
855	/**
856	* Transforms a single query, from one field to another.
857	*
858	* @since 3.2.0
859	*
860	* @param array &$query The single query
861	* @param string $resulting_field The resulting field
862	*/
863	public function transform_query( &$query, $resulting_field ) {
864	global $wpdb;
865
866	if ( empty( $query['terms'] ) )
867	return;
868
869	if ( $query['field'] == $resulting_field )
870	return;
871
872	$resulting_field = sanitize_key( $resulting_field );
873
874	switch ( $query['field'] ) {
875	case 'slug':
876	case 'name':
877	$terms = "'" . implode( "','", array_map( 'sanitize_title_for_query', $query['terms'] ) ) . "'";
878	$terms = $wpdb->get_col( "
879	SELECT $wpdb->term_taxonomy.$resulting_field
880	FROM $wpdb->term_taxonomy
881	INNER JOIN $wpdb->terms USING (term_id)
882	WHERE taxonomy = '{$query['taxonomy']}'
883	AND $wpdb->terms.{$query['field']} IN ($terms)
884	" );
885	break;
886	case 'term_taxonomy_id':
887	$terms = implode( ',', array_map( 'intval', $query['terms'] ) );
888	$terms = $wpdb->get_col( "
889	SELECT $resulting_field
890	FROM $wpdb->term_taxonomy
891	WHERE term_taxonomy_id IN ($terms)
892	" );
893	break;
894	default:
895	$terms = implode( ',', array_map( 'intval', $query['terms'] ) );
896	$terms = $wpdb->get_col( "
897	SELECT $resulting_field
898	FROM $wpdb->term_taxonomy
899	WHERE taxonomy = '{$query['taxonomy']}'
900	AND term_id IN ($terms)
901	" );
902	}
903
904	if ( 'AND' == $query['operator'] && count( $terms ) < count( $query['terms'] ) ) {
905	$query = new WP_Error( 'Inexistent terms' );
906	return;
907	}
908
909	$query['terms'] = $terms;
910	$query['field'] = $resulting_field;
911	}
912	}
913
914	/**
915	* Get all Term data from database by Term ID.
916	*
917	* The usage of the get_term function is to apply filters to a term object. It
918	* is possible to get a term object from the database before applying the
919	* filters.
920	*
921	* $term ID must be part of $taxonomy, to get from the database. Failure, might
922	* be able to be captured by the hooks. Failure would be the same value as $wpdb
923	* returns for the get_row method.
924	*
925	* There are two hooks, one is specifically for each term, named 'get_term', and
926	* the second is for the taxonomy name, 'term_$taxonomy'. Both hooks gets the
927	* term object, and the taxonomy name as parameters. Both hooks are expected to
928	* return a Term object.
929	*
930	* 'get_term' hook - Takes two parameters the term Object and the taxonomy name.
931	* Must return term object. Used in get_term() as a catch-all filter for every
932	* $term.
933	*
934	* 'get_$taxonomy' hook - Takes two parameters the term Object and the taxonomy
935	* name. Must return term object. $taxonomy will be the taxonomy name, so for
936	* example, if 'category', it would be 'get_category' as the filter name. Useful
937	* for custom taxonomies or plugging into default taxonomies.
938	*
939	* @since 2.3.0
940	*
941	* @uses $wpdb
942	* @uses sanitize_term() Cleanses the term based on $filter context before returning.
943	* @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
944	*
945	* @param int\|object $term If integer, will get from database. If object will apply filters and return $term.
946	* @param string $taxonomy Taxonomy name that $term is part of.
947	* @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N
948	* @param string $filter Optional, default is raw or no WordPress defined filter will applied.
949	* @return mixed\|null\|WP_Error Term Row from database. Will return null if $term is empty. If taxonomy does not
950	* exist then WP_Error will be returned.
951	*/
952	function get_term($term, $taxonomy, $output = OBJECT, $filter = 'raw') {
953	global $wpdb;
954
955	if ( empty($term) ) {
956	$error = new WP_Error('invalid_term', __('Empty Term'));
957	return $error;
958	}
959
960	if ( ! taxonomy_exists($taxonomy) ) {
961	$error = new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
962	return $error;
963	}
964
965	if ( is_object($term) && empty($term->filter) ) {
966	wp_cache_add($term->term_id, $term, $taxonomy);
967	$_term = $term;
968	} else {
969	if ( is_object($term) )
970	$term = $term->term_id;
971	if ( !$term = (int) $term )
972	return null;
973	if ( ! $_term = wp_cache_get($term, $taxonomy) ) {
974	$_term = $wpdb->get_row( $wpdb->prepare( "SELECT t., tt. FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND t.term_id = %d LIMIT 1", $taxonomy, $term) );
975	if ( ! $_term )
976	return null;
977	wp_cache_add($term, $_term, $taxonomy);
978	}
979	}
980
981	/**
982	* Filter a term.
983	*
984	* @since 2.3.0
985	*
986	* @param int\|object $_term Term object or ID.
987	* @param string $taxonomy The taxonomy slug.
988	*/
989	$_term = apply_filters( 'get_term', $_term, $taxonomy );
990
991	/**
992	* Filter a taxonomy.
993	*
994	* The dynamic portion of the filter name, $taxonomy, refers
995	* to the taxonomy slug.
996	*
997	* @since 2.3.0
998	*
999	* @param int\|object $_term Term object or ID.
1000	* @param string $taxonomy The taxonomy slug.
1001	*/
1002	$_term = apply_filters( "get_$taxonomy", $_term, $taxonomy );
1003	$_term = sanitize_term($_term, $taxonomy, $filter);
1004
1005	if ( $output == OBJECT ) {
1006	return $_term;
1007	} elseif ( $output == ARRAY_A ) {
1008	$__term = get_object_vars($_term);
1009	return $__term;
1010	} elseif ( $output == ARRAY_N ) {
1011	$__term = array_values(get_object_vars($_term));
1012	return $__term;
1013	} else {
1014	return $_term;
1015	}
1016	}
1017
1018	/**
1019	* Get all Term data from database by Term field and data.
1020	*
1021	* Warning: $value is not escaped for 'name' $field. You must do it yourself, if
1022	* required.
1023	*
1024	* The default $field is 'id', therefore it is possible to also use null for
1025	* field, but not recommended that you do so.
1026	*
1027	* If $value does not exist, the return value will be false. If $taxonomy exists
1028	* and $field and $value combinations exist, the Term will be returned.
1029	*
1030	* @since 2.3.0
1031	*
1032	* @uses $wpdb
1033	* @uses sanitize_term() Cleanses the term based on $filter context before returning.
1034	* @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
1035	*
1036	* @param string $field Either 'slug', 'name', 'id' (term_id), or 'term_taxonomy_id'
1037	* @param string\|int $value Search for this term value
1038	* @param string $taxonomy Taxonomy Name
1039	* @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N
1040	* @param string $filter Optional, default is raw or no WordPress defined filter will applied.
1041	* @return mixed Term Row from database. Will return false if $taxonomy does not exist or $term was not found.
1042	*/
1043	function get_term_by($field, $value, $taxonomy, $output = OBJECT, $filter = 'raw') {
1044	global $wpdb;
1045
1046	if ( ! taxonomy_exists($taxonomy) )
1047	return false;
1048
1049	if ( 'slug' == $field ) {
1050	$field = 't.slug';
1051	$value = sanitize_title($value);
1052	if ( empty($value) )
1053	return false;
1054	} else if ( 'name' == $field ) {
1055	// Assume already escaped
1056	$value = wp_unslash($value);
1057	$field = 't.name';
1058	} else if ( 'term_taxonomy_id' == $field ) {
1059	$value = (int) $value;
1060	$field = 'tt.term_taxonomy_id';
1061	} else {
1062	$term = get_term( (int) $value, $taxonomy, $output, $filter);
1063	if ( is_wp_error( $term ) )
1064	$term = false;
1065	return $term;
1066	}
1067
1068	$term = $wpdb->get_row( $wpdb->prepare( "SELECT t., tt. FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND $field = %s LIMIT 1", $taxonomy, $value) );
1069	if ( !$term )
1070	return false;
1071
1072	wp_cache_add($term->term_id, $term, $taxonomy);
1073
1074	/** This filter is documented in wp-includes/taxonomy.php */
1075	$term = apply_filters( 'get_term', $term, $taxonomy );
1076
1077	/** This filter is documented in wp-includes/taxonomy.php */
1078	$term = apply_filters( "get_$taxonomy", $term, $taxonomy );
1079
1080	$term = sanitize_term($term, $taxonomy, $filter);
1081
1082	if ( $output == OBJECT ) {
1083	return $term;
1084	} elseif ( $output == ARRAY_A ) {
1085	return get_object_vars($term);
1086	} elseif ( $output == ARRAY_N ) {
1087	return array_values(get_object_vars($term));
1088	} else {
1089	return $term;
1090	}
1091	}
1092
1093	/**
1094	* Merge all term children into a single array of their IDs.
1095	*
1096	* This recursive function will merge all of the children of $term into the same
1097	* array of term IDs. Only useful for taxonomies which are hierarchical.
1098	*
1099	* Will return an empty array if $term does not exist in $taxonomy.
1100	*
1101	* @since 2.3.0
1102	*
1103	* @uses $wpdb
1104	* @uses _get_term_hierarchy()
1105	* @uses get_term_children() Used to get the children of both $taxonomy and the parent $term
1106	*
1107	* @param string $term_id ID of Term to get children
1108	* @param string $taxonomy Taxonomy Name
1109	* @return array\|WP_Error List of Term IDs. WP_Error returned if $taxonomy does not exist
1110	*/
1111	function get_term_children( $term_id, $taxonomy ) {
1112	if ( ! taxonomy_exists($taxonomy) )
1113	return new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
1114
1115	$term_id = intval( $term_id );
1116
1117	$terms = _get_term_hierarchy($taxonomy);
1118
1119	if ( ! isset($terms[$term_id]) )
1120	return array();
1121
1122	$children = $terms[$term_id];
1123
1124	foreach ( (array) $terms[$term_id] as $child ) {
1125	if ( $term_id == $child ) {
1126	continue;
1127	}
1128
1129	if ( isset($terms[$child]) )
1130	$children = array_merge($children, get_term_children($child, $taxonomy));
1131	}
1132
1133	return $children;
1134	}
1135
1136	/**
1137	* Get sanitized Term field.
1138	*
1139	* Does checks for $term, based on the $taxonomy. The function is for contextual
1140	* reasons and for simplicity of usage. See sanitize_term_field() for more
1141	* information.
1142	*
1143	* @since 2.3.0
1144	*
1145	* @uses sanitize_term_field() Passes the return value in sanitize_term_field on success.
1146	*
1147	* @param string $field Term field to fetch
1148	* @param int $term Term ID
1149	* @param string $taxonomy Taxonomy Name
1150	* @param string $context Optional, default is display. Look at sanitize_term_field() for available options.
1151	* @return mixed Will return an empty string if $term is not an object or if $field is not set in $term.
1152	*/
1153	function get_term_field( $field, $term, $taxonomy, $context = 'display' ) {
1154	$term = (int) $term;
1155	$term = get_term( $term, $taxonomy );
1156	if ( is_wp_error($term) )
1157	return $term;
1158
1159	if ( !is_object($term) )
1160	return '';
1161
1162	if ( !isset($term->$field) )
1163	return '';
1164
1165	return sanitize_term_field($field, $term->$field, $term->term_id, $taxonomy, $context);
1166	}
1167
1168	/**
1169	* Sanitizes Term for editing.
1170	*
1171	* Return value is sanitize_term() and usage is for sanitizing the term for
1172	* editing. Function is for contextual and simplicity.
1173	*
1174	* @since 2.3.0
1175	*
1176	* @uses sanitize_term() Passes the return value on success
1177	*
1178	* @param int\|object $id Term ID or Object
1179	* @param string $taxonomy Taxonomy Name
1180	* @return mixed\|null\|WP_Error Will return empty string if $term is not an object.
1181	*/
1182	function get_term_to_edit( $id, $taxonomy ) {
1183	$term = get_term( $id, $taxonomy );
1184
1185	if ( is_wp_error($term) )
1186	return $term;
1187
1188	if ( !is_object($term) )
1189	return '';
1190
1191	return sanitize_term($term, $taxonomy, 'edit');
1192	}
1193
1194	/**
1195	* Retrieve the terms in a given taxonomy or list of taxonomies.
1196	*
1197	* You can fully inject any customizations to the query before it is sent, as
1198	* well as control the output with a filter.
1199	*
1200	* The 'get_terms' filter will be called when the cache has the term and will
1201	* pass the found term along with the array of $taxonomies and array of $args.
1202	* This filter is also called before the array of terms is passed and will pass
1203	* the array of terms, along with the $taxonomies and $args.
1204	*
1205	* The 'list_terms_exclusions' filter passes the compiled exclusions along with
1206	* the $args.
1207	*
1208	* The 'get_terms_orderby' filter passes the ORDER BY clause for the query
1209	* along with the $args array.
1210	*
1211	* The 'get_terms_fields' filter passes the fields for the SELECT query
1212	* along with the $args array.
1213	*
1214	* @since 2.3.0
1215	*
1216	* @global wpdb $wpdb WordPress database access abstraction object.
1217	*
1218	* @param string\|array $taxonomies Taxonomy name or list of Taxonomy names.
1219	* @param array\|string $args {
1220	* Optional. Array or string of arguments to get terms.
1221	*
1222	* @type string $orderby Field(s) to order terms by. Accepts term fields, though
1223	* empty defaults to 'term_id'. Default 'name'.
1224	* @type string $order Whether to order terms in ascending or descending order.
1225	* Accepts 'ASC' (ascending) or 'DESC' (descending).
1226	* Default 'ASC'.
1227	* @type bool\|int $hide_empty Whether to hide terms not assigned to any posts. Accepts
1228	* 1\|true or 0\|false. Default 1\|true.
1229	* @type array\|string $include Array or comma/space-separated string of term ids to include.
1230	* Default empty array.
1231	* @type array\|string $exclude Array or comma/space-separated string of term ids to exclude.
1232	* If $include is non-empty, $exclude is ignored.
1233	* Default empty array.
1234	* @type array\|string $exclude_tree Array or comma/space-separated string of term ids to exclude
1235	* along with all of their descendant terms. If $include is
1236	* non-empty, $exclude_tree is ignored. Default empty array.
1237	* @type int $number Maximum number of terms to return. Accepts 1+ or -1 (all).
1238	* Default -1.
1239	* @type int $offset The number by which to offset the terms query. Default empty.
1240	* @type string $fields Term fields to query for. Accepts 'all' (returns an array of
1241	* term objects), 'ids' or 'names' (returns an array of integers
1242	* or strings, respectively. Default 'all'.
1243	* @type string $slug Slug to return term(s) for. Default empty.
1244	* @type bool $hierarchical Whether to include terms that have non-empty descendants (even
1245	* if $hide_empty is set to true). Default true.
1246	* @type string $search Search criteria to match terms. Will be SQL-formatted with
1247	* wildcards before and after. Default empty.
1248	* @type string $name__like Retrieve terms with criteria by which a term is LIKE $name__like.
1249	* Default empty.
1250	* @type string $description__like Retrieve terms where the description is LIKE $description__like.
1251	* Default empty.
1252	* @type bool $pad_counts Whether to pad the quantity of a term's children in the quantity
1253	* of each term's "count" object variable. Default false.
1254	* @type string $get Whether to return terms regardless of ancestry or whether the terms
1255	* are empty. Accepts 'all' or empty (disabled). Default empty.
1256	* @type int $child_of Term ID to retrieve child terms of. If multiple taxonomies
1257	* are passed, $child_of is ignored. Default 0.
1258	* @type int\|string $parent Parent term ID to retrieve direct-child terms of. Default empty.
1259	* @type string $cache_domain Unique cache key to be produced when this query is stored in an
1260	* object cache. Default is 'core'.
1261	* }
1262	* @return array\|WP_Error List of Term Objects and their children. Will return WP_Error, if any of $taxonomies
1263	* do not exist.
1264	*/
1265	function get_terms( $taxonomies, $args = '' ) {
1266	global $wpdb;
1267	$empty_array = array();
1268
1269	$single_taxonomy = ! is_array( $taxonomies ) \|\| 1 === count( $taxonomies );
1270	if ( ! is_array( $taxonomies ) ) {
1271	$taxonomies = array( $taxonomies );
1272	}
1273
1274	foreach ( $taxonomies as $taxonomy ) {
1275	if ( ! taxonomy_exists($taxonomy) ) {
1276	$error = new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
1277	return $error;
1278	}
1279	}
1280
1281	$defaults = array('orderby' => 'name', 'order' => 'ASC',
1282	'hide_empty' => true, 'exclude' => array(), 'exclude_tree' => array(), 'include' => array(),
1283	'number' => '', 'fields' => 'all', 'slug' => '', 'parent' => '',
1284	'hierarchical' => true, 'child_of' => 0, 'get' => '', 'name__like' => '', 'description__like' => '',
1285	'pad_counts' => false, 'offset' => '', 'search' => '', 'cache_domain' => 'core' );
1286	$args = wp_parse_args( $args, $defaults );
1287	$args['number'] = absint( $args['number'] );
1288	$args['offset'] = absint( $args['offset'] );
1289	if ( !$single_taxonomy \|\| ! is_taxonomy_hierarchical( reset( $taxonomies ) ) \|\|
1290	( '' !== $args['parent'] && 0 !== $args['parent'] ) ) {
1291	$args['child_of'] = 0;
1292	$args['hierarchical'] = false;
1293	$args['pad_counts'] = false;
1294	}
1295
1296	if ( 'all' == $args['get'] ) {
1297	$args['child_of'] = 0;
1298	$args['hide_empty'] = 0;
1299	$args['hierarchical'] = false;
1300	$args['pad_counts'] = false;
1301	}
1302
1303	/**
1304	* Filter the terms query arguments.
1305	*
1306	* @since 3.1.0
1307	*
1308	* @param array $args An array of arguments.
1309	* @param string\|array $taxonomies A taxonomy or array of taxonomies.
1310	*/
1311	$args = apply_filters( 'get_terms_args', $args, $taxonomies );
1312
1313	$child_of = $args['child_of'];
1314	if ( $child_of ) {
1315	$hierarchy = _get_term_hierarchy( reset( $taxonomies ) );
1316	if ( ! isset( $hierarchy[ $child_of ] ) ) {
1317	return $empty_array;
1318	}
1319	}
1320
1321	$parent = $args['parent'];
1322	if ( $parent ) {
1323	$hierarchy = _get_term_hierarchy( reset( $taxonomies ) );
1324	if ( ! isset( $hierarchy[ $parent ] ) ) {
1325	return $empty_array;
1326	}
1327	}
1328
1329	$_orderby = strtolower( $args['orderby'] );
1330	if ( 'count' == $_orderby ) {
1331	$orderby = 'tt.count';
1332	} else if ( 'name' == $_orderby ) {
1333	$orderby = 't.name';
1334	} else if ( 'slug' == $_orderby ) {
1335	$orderby = 't.slug';
1336	} else if ( 'term_group' == $_orderby ) {
1337	$orderby = 't.term_group';
1338	} else if ( 'none' == $_orderby ) {
1339	$orderby = '';
1340	} elseif ( empty($_orderby) \|\| 'id' == $_orderby ) {
1341	$orderby = 't.term_id';
1342	} else {
1343	$orderby = 't.name';
1344	}
1345	/**
1346	* Filter the ORDERBY clause of the terms query.
1347	*
1348	* @since 2.8.0
1349	*
1350	* @param string $orderby ORDERBY clause of the terms query.
1351	* @param array $args An array of terms query arguments.
1352	* @param string\|array $taxonomies A taxonomy or array of taxonomies.
1353	*/
1354	$orderby = apply_filters( 'get_terms_orderby', $orderby, $args, $taxonomies );
1355
1356	$order = strtoupper( $args['order'] );
1357	if ( ! empty( $orderby ) ) {
1358	$orderby = "ORDER BY $orderby";
1359	} else {
1360	$order = '';
1361	}
1362
1363	if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) ) {
1364	$order = 'ASC';
1365	}
1366
1367	$where = "tt.taxonomy IN ('" . implode("', '", $taxonomies) . "')";
1368
1369	$exclude = $args['exclude'];
1370	$exclude_tree = $args['exclude_tree'];
1371	$include = $args['include'];
1372
1373	$inclusions = '';
1374	if ( ! empty( $include ) ) {
1375	$exclude = '';
1376	$exclude_tree = '';
1377	$inclusions = implode( ',', wp_parse_id_list( $include ) );
1378	}
1379
1380	if ( ! empty( $inclusions ) ) {
1381	$inclusions = ' AND t.term_id IN ( ' . $inclusions . ' )';
1382	$where .= $inclusions;
1383	}
1384
1385	if ( ! empty( $exclude_tree ) ) {
1386	$exclude_tree = wp_parse_id_list( $exclude_tree );
1387	$excluded_children = $exclude_tree;
1388	foreach ( $exclude_tree as $extrunk ) {
1389	$excluded_children = array_merge(
1390	$excluded_children,
1391	(array) get_terms( $taxonomies[0], array( 'child_of' => intval( $extrunk ), 'fields' => 'ids', 'hide_empty' => 0 ) )
1392	);
1393	}
1394	$exclusions = implode( ',', array_map( 'intval', $excluded_children ) );
1395	} else {
1396	$exclusions = '';
1397	}
1398
1399	if ( ! empty( $exclude ) ) {
1400	$exterms = wp_parse_id_list( $exclude );
1401	if ( empty( $exclusions ) ) {
1402	$exclusions = implode( ',', $exterms );
1403	} else {
1404	$exclusions .= ', ' . implode( ',', $exterms );
1405	}
1406	}
1407
1408	if ( ! empty( $exclusions ) ) {
1409	$exclusions = ' AND t.term_id NOT IN (' . $exclusions . ')';
1410	}
1411
1412	/**
1413	* Filter the terms to exclude from the terms query.
1414	*
1415	* @since 2.3.0
1416	*
1417	* @param string $exclusions NOT IN clause of the terms query.
1418	* @param array $args An array of terms query arguments.
1419	* @param string\|array $taxonomies A taxonomy or array of taxonomies.
1420	*/
1421	$exclusions = apply_filters( 'list_terms_exclusions', $exclusions, $args, $taxonomies );
1422
1423	if ( ! empty( $exclusions ) ) {
1424	$where .= $exclusions;
1425	}
1426
1427	if ( ! empty( $args['slug'] ) ) {
1428	$slug = sanitize_title( $args['slug'] );
1429	$where .= " AND t.slug = '$slug'";
1430	}
1431
1432	if ( ! empty( $args['name__like'] ) ) {
1433	$where .= $wpdb->prepare( " AND t.name LIKE %s", '%' . $wpdb->esc_like( $args['name__like'] ) . '%' );
1434	}
1435
1436	if ( ! empty( $args['description__like'] ) ) {
1437	$where .= $wpdb->prepare( " AND tt.description LIKE %s", '%' . $wpdb->esc_like( $args['description__like'] ) . '%' );
1438	}
1439
1440	if ( '' !== $parent ) {
1441	$parent = (int) $parent;
1442	$where .= " AND tt.parent = '$parent'";
1443	}
1444
1445	$hierarchical = $args['hierarchical'];
1446	if ( 'count' == $args['fields'] ) {
1447	$hierarchical = false;
1448	}
1449	if ( $args['hide_empty'] && !$hierarchical ) {
1450	$where .= ' AND tt.count > 0';
1451	}
1452
1453	$number = $args['number'];
1454	$offset = $args['offset'];
1455
1456	// don't limit the query results when we have to descend the family tree
1457	if ( $number && ! $hierarchical && ! $child_of && '' === $parent ) {
1458	if ( $offset ) {
1459	$limits = 'LIMIT ' . $offset . ',' . $number;
1460	} else {
1461	$limits = 'LIMIT ' . $number;
1462	}
1463	} else {
1464	$limits = '';
1465	}
1466
1467	if ( ! empty( $args['search'] ) ) {
1468	$like = '%' . $wpdb->esc_like( $args['search'] ) . '%';
1469	$where .= $wpdb->prepare( ' AND ((t.name LIKE %s) OR (t.slug LIKE %s))', $like, $like );
1470	}
1471
1472	$selects = array();
1473	switch ( $args['fields'] ) {
1474	case 'all':
1475	$selects = array( 't.', 'tt.' );
1476	break;
1477	case 'ids':
1478	case 'id=>parent':
1479	$selects = array( 't.term_id', 'tt.parent', 'tt.count' );
1480	break;
1481	case 'names':
1482	$selects = array( 't.term_id', 'tt.parent', 'tt.count', 't.name' );
1483	break;
1484	case 'count':
1485	$orderby = '';
1486	$order = '';
1487	$selects = array( 'COUNT(*)' );
1488	break;
1489	case 'id=>name':
1490	$selects = array( 't.term_id', 't.name' );
1491	break;
1492	case 'id=>slug':
1493	$selects = array( 't.term_id', 't.slug' );
1494	break;
1495	}
1496
1497	$_fields = $args['fields'];
1498
1499	/**
1500	* Filter the fields to select in the terms query.
1501	*
1502	* @since 2.8.0
1503	*
1504	* @param array $selects An array of fields to select for the terms query.
1505	* @param array $args An array of term query arguments.
1506	* @param string\|array $taxonomies A taxonomy or array of taxonomies.
1507	*/
1508	$fields = implode( ', ', apply_filters( 'get_terms_fields', $selects, $args, $taxonomies ) );
1509
1510	$join = "INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id";
1511
1512	$pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits' );
1513
1514	/**
1515	* Filter the terms query SQL clauses.
1516	*
1517	* @since 3.1.0
1518	*
1519	* @param array $pieces Terms query SQL clauses.
1520	* @param string\|array $taxonomies A taxonomy or array of taxonomies.
1521	* @param array $args An array of terms query arguments.
1522	*/
1523	$clauses = apply_filters( 'terms_clauses', compact( $pieces ), $taxonomies, $args );
1524	$fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : '';
1525	$join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : '';
1526	$where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : '';
1527	$orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : '';
1528	$order = isset( $clauses[ 'order' ] ) ? $clauses[ 'order' ] : '';
1529	$limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : '';
1530
1531	$query = "SELECT $fields FROM $wpdb->terms AS t $join WHERE $where $orderby $order $limits";
1532
1533	// $args can be whatever, only use the args defined in defaults to compute the key
1534	$filter_key = ( has_filter('list_terms_exclusions') ) ? serialize($GLOBALS['wp_filter']['list_terms_exclusions']) : '';
1535	$key = md5( $query . $filter_key );
1536	$last_changed = wp_cache_get( 'last_changed', 'terms' );
1537	if ( ! $last_changed ) {
1538	$last_changed = microtime();
1539	wp_cache_set( 'last_changed', $last_changed, 'terms' );
1540	}
1541	$cache_key = "get_terms:$key:$last_changed";
1542	$cache = wp_cache_get( $cache_key, 'terms' );
1543	if ( false !== $cache ) {
1544
1545	/**
1546	* Filter the given taxonomy's terms cache.
1547	*
1548	* @since 2.3.0
1549	*
1550	* @param array $cache Cached array of terms for the given taxonomy.
1551	* @param string\|array $taxonomies A taxonomy or array of taxonomies.
1552	* @param array $args An array of arguments to get terms.
1553	*/
1554	$cache = apply_filters( 'get_terms', $cache, $taxonomies, $args );
1555	return $cache;
1556	}
1557
1558	if ( 'count' == $_fields ) {
1559	$term_count = $wpdb->get_var($query);
1560	return $term_count;
1561	}
1562
1563	$terms = $wpdb->get_results($query);
1564	if ( 'all' == $_fields ) {
1565	update_term_cache($terms);
1566	}
1567
1568	if ( empty($terms) ) {
1569	wp_cache_add( $cache_key, array(), 'terms', DAY_IN_SECONDS );
1570
1571	/** This filter is documented in wp-includes/taxonomy.php */
1572	$terms = apply_filters( 'get_terms', array(), $taxonomies, $args );
1573	return $terms;
1574	}
1575
1576	if ( $child_of ) {
1577	$children = _get_term_hierarchy( reset( $taxonomies ) );
1578	if ( ! empty( $children ) ) {
1579	$terms = _get_term_children( $child_of, $terms, reset( $taxonomies ) );
1580	}
1581	}
1582
1583	// Update term counts to include children.
1584	if ( $args['pad_counts'] && 'all' == $_fields ) {
1585	_pad_term_counts( $terms, reset( $taxonomies ) );
1586	}
1587	// Make sure we show empty categories that have children.
1588	if ( $hierarchical && $args['hide_empty'] && is_array( $terms ) ) {
1589	foreach ( $terms as $k => $term ) {
1590	if ( ! $term->count ) {
1591	$children = get_term_children( $term->term_id, reset( $taxonomies ) );
1592	if ( is_array( $children ) ) {
1593	foreach ( $children as $child_id ) {
1594	$child = get_term( $child_id, reset( $taxonomies ) );
1595	if ( $child->count ) {
1596	continue 2;
1597	}
1598	}
1599	}
1600
1601	// It really is empty
1602	unset($terms[$k]);
1603	}
1604	}
1605	}
1606	reset( $terms );
1607
1608	$_terms = array();
1609	if ( 'id=>parent' == $_fields ) {
1610	while ( $term = array_shift( $terms ) ) {
1611	$_terms[$term->term_id] = $term->parent;
1612	}
1613	} elseif ( 'ids' == $_fields ) {
1614	while ( $term = array_shift( $terms ) ) {
1615	$_terms[] = $term->term_id;
1616	}
1617	} elseif ( 'names' == $_fields ) {
1618	while ( $term = array_shift( $terms ) ) {
1619	$_terms[] = $term->name;
1620	}
1621	} elseif ( 'id=>name' == $_fields ) {
1622	while ( $term = array_shift( $terms ) ) {
1623	$_terms[$term->term_id] = $term->name;
1624	}
1625	} elseif ( 'id=>slug' == $_fields ) {
1626	while ( $term = array_shift( $terms ) ) {
1627	$_terms[$term->term_id] = $term->slug;
1628	}
1629	}
1630
1631	if ( ! empty( $_terms ) ) {
1632	$terms = $_terms;
1633	}
1634
1635	if ( $number && is_array( $terms ) && count( $terms ) > $number ) {
1636	$terms = array_slice( $terms, $offset, $number );
1637	}
1638
1639	wp_cache_add( $cache_key, $terms, 'terms', DAY_IN_SECONDS );
1640
1641	/** This filter is documented in wp-includes/taxonomy */
1642	$terms = apply_filters( 'get_terms', $terms, $taxonomies, $args );
1643	return $terms;
1644	}
1645
1646	/**
1647	* Check if Term exists.
1648	*
1649	* Formerly is_term(), introduced in 2.3.0.
1650	*
1651	* @since 3.0.0
1652	*
1653	* @uses $wpdb
1654	*
1655	* @param int\|string $term The term to check
1656	* @param string $taxonomy The taxonomy name to use
1657	* @param int $parent ID of parent term under which to confine the exists search.
1658	* @return mixed Returns 0 if the term does not exist. Returns the term ID if no taxonomy is specified
1659	* and the term ID exists. Returns an array of the term ID and the term taxonomy ID
1660	* if the taxonomy is specified and the pairing exists.
1661	*/
1662	function term_exists($term, $taxonomy = '', $parent = 0) {
1663	global $wpdb;
1664
1665	$select = "SELECT term_id FROM $wpdb->terms as t WHERE ";
1666	$tax_select = "SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE ";
1667
1668	if ( is_int($term) ) {
1669	if ( 0 == $term )
1670	return 0;
1671	$where = 't.term_id = %d';
1672	if ( !empty($taxonomy) )
1673	return $wpdb->get_row( $wpdb->prepare( $tax_select . $where . " AND tt.taxonomy = %s", $term, $taxonomy ), ARRAY_A );
1674	else
1675	return $wpdb->get_var( $wpdb->prepare( $select . $where, $term ) );
1676	}
1677
1678	$term = trim( wp_unslash( $term ) );
1679
1680	if ( '' === $slug = sanitize_title($term) )
1681	return 0;
1682
1683	$where = 't.slug = %s';
1684	$else_where = 't.name = %s';
1685	$where_fields = array($slug);
1686	$else_where_fields = array($term);
1687	if ( !empty($taxonomy) ) {
1688	$parent = (int) $parent;
1689	if ( $parent > 0 ) {
1690	$where_fields[] = $parent;
1691	$else_where_fields[] = $parent;
1692	$where .= ' AND tt.parent = %d';
1693	$else_where .= ' AND tt.parent = %d';
1694	}
1695
1696	$where_fields[] = $taxonomy;
1697	$else_where_fields[] = $taxonomy;
1698
1699	if ( $result = $wpdb->get_row( $wpdb->prepare("SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE $where AND tt.taxonomy = %s", $where_fields), ARRAY_A) )
1700	return $result;
1701
1702	return $wpdb->get_row( $wpdb->prepare("SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE $else_where AND tt.taxonomy = %s", $else_where_fields), ARRAY_A);
1703	}
1704
1705	if ( $result = $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $where", $where_fields) ) )
1706	return $result;
1707
1708	return $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $else_where", $else_where_fields) );
1709	}
1710
1711	/**
1712	* Check if a term is an ancestor of another term.
1713	*
1714	* You can use either an id or the term object for both parameters.
1715	*
1716	* @since 3.4.0
1717	*
1718	* @param int\|object $term1 ID or object to check if this is the parent term.
1719	* @param int\|object $term2 The child term.
1720	* @param string $taxonomy Taxonomy name that $term1 and $term2 belong to.
1721	* @return bool Whether $term2 is child of $term1
1722	*/
1723	function term_is_ancestor_of( $term1, $term2, $taxonomy ) {
1724	if ( ! isset( $term1->term_id ) )
1725	$term1 = get_term( $term1, $taxonomy );
1726	if ( ! isset( $term2->parent ) )
1727	$term2 = get_term( $term2, $taxonomy );
1728
1729	if ( empty( $term1->term_id ) \|\| empty( $term2->parent ) )
1730	return false;
1731	if ( $term2->parent == $term1->term_id )
1732	return true;
1733
1734	return term_is_ancestor_of( $term1, get_term( $term2->parent, $taxonomy ), $taxonomy );
1735	}
1736
1737	/**
1738	* Sanitize Term all fields.
1739	*
1740	* Relies on sanitize_term_field() to sanitize the term. The difference is that
1741	* this function will sanitize <strong>all</strong> fields. The context is based
1742	* on sanitize_term_field().
1743	*
1744	* The $term is expected to be either an array or an object.
1745	*
1746	* @since 2.3.0
1747	*
1748	* @uses sanitize_term_field Used to sanitize all fields in a term
1749	*
1750	* @param array\|object $term The term to check
1751	* @param string $taxonomy The taxonomy name to use
1752	* @param string $context Default is 'display'.
1753	* @return array\|object Term with all fields sanitized
1754	*/
1755	function sanitize_term($term, $taxonomy, $context = 'display') {
1756
1757	$fields = array( 'term_id', 'name', 'description', 'slug', 'count', 'parent', 'term_group', 'term_taxonomy_id', 'object_id' );
1758
1759	$do_object = is_object( $term );
1760
1761	$term_id = $do_object ? $term->term_id : (isset($term['term_id']) ? $term['term_id'] : 0);
1762
1763	foreach ( (array) $fields as $field ) {
1764	if ( $do_object ) {
1765	if ( isset($term->$field) )
1766	$term->$field = sanitize_term_field($field, $term->$field, $term_id, $taxonomy, $context);
1767	} else {
1768	if ( isset($term[$field]) )
1769	$term[$field] = sanitize_term_field($field, $term[$field], $term_id, $taxonomy, $context);
1770	}
1771	}
1772
1773	if ( $do_object )
1774	$term->filter = $context;
1775	else
1776	$term['filter'] = $context;
1777
1778	return $term;
1779	}
1780
1781	/**
1782	* Cleanse the field value in the term based on the context.
1783	*
1784	* Passing a term field value through the function should be assumed to have
1785	* cleansed the value for whatever context the term field is going to be used.
1786	*
1787	* If no context or an unsupported context is given, then default filters will
1788	* be applied.
1789	*
1790	* There are enough filters for each context to support a custom filtering
1791	* without creating your own filter function. Simply create a function that
1792	* hooks into the filter you need.
1793	*
1794	* @since 2.3.0
1795	*
1796	* @uses $wpdb
1797	*
1798	* @param string $field Term field to sanitize
1799	* @param string $value Search for this term value
1800	* @param int $term_id Term ID
1801	* @param string $taxonomy Taxonomy Name
1802	* @param string $context Either edit, db, display, attribute, or js.
1803	* @return mixed sanitized field
1804	*/
1805	function sanitize_term_field($field, $value, $term_id, $taxonomy, $context) {
1806	$int_fields = array( 'parent', 'term_id', 'count', 'term_group', 'term_taxonomy_id', 'object_id' );
1807	if ( in_array( $field, $int_fields ) ) {
1808	$value = (int) $value;
1809	if ( $value < 0 )
1810	$value = 0;
1811	}
1812
1813	if ( 'raw' == $context )
1814	return $value;
1815
1816	if ( 'edit' == $context ) {
1817
1818	/**
1819	* Filter a term field to edit before it is sanitized.
1820	*
1821	* The dynamic portion of the filter name, $field, refers to the term field.
1822	*
1823	* @since 2.3.0
1824	*
1825	* @param mixed $value Value of the term field.
1826	* @param int $term_id Term ID.
1827	* @param string $taxonomy Taxonomy slug.
1828	*/
1829	$value = apply_filters( "edit_term_{$field}", $value, $term_id, $taxonomy );
1830
1831	/**
1832	* Filter the taxonomy field to edit before it is sanitized.
1833	*
1834	* The dynamic portions of the filter name, $taxonomy, and $field, refer
1835	* to the taxonomy slug and taxonomy field, respectively.
1836	*
1837	* @since 2.3.0
1838	*
1839	* @param mixed $value Value of the taxonomy field to edit.
1840	* @param int $term_id Term ID.
1841	*/
1842	$value = apply_filters( "edit_{$taxonomy}_{$field}", $value, $term_id );
1843	if ( 'description' == $field )
1844	$value = esc_html($value); // textarea_escaped
1845	else
1846	$value = esc_attr($value);
1847	} else if ( 'db' == $context ) {
1848
1849	/**
1850	* Filter a term field value before it is sanitized.
1851	*
1852	* The dynamic portion of the filter name, $field, refers to the term field.
1853	*
1854	* @since 2.3.0
1855	*
1856	* @param mixed $value Value of the term field.
1857	* @param string $taxonomy Taxonomy slug.
1858	*/
1859	$value = apply_filters( "pre_term_{$field}", $value, $taxonomy );
1860
1861	/**
1862	* Filter a taxonomy field before it is sanitized.
1863	*
1864	* The dynamic portions of the filter name, $taxonomy, and $field, refer
1865	* to the taxonomy slug and field name, respectively.
1866	*
1867	* @since 2.3.0
1868	*
1869	* @param mixed $value Value of the taxonomy field.
1870	*/
1871	$value = apply_filters( "pre_{$taxonomy}_{$field}", $value );
1872	// Back compat filters
1873	if ( 'slug' == $field ) {
1874	/**
1875	* Filter the category nicename before it is sanitized.
1876	*
1877	* Use the pre_{$taxonomy}_{$field} hook instead.
1878	*
1879	* @since 2.0.3
1880	*
1881	* @param string $value The category nicename.
1882	*/
1883	$value = apply_filters( 'pre_category_nicename', $value );
1884	}
1885
1886	} else if ( 'rss' == $context ) {
1887
1888	/**
1889	* Filter the term field for use in RSS.
1890	*
1891	* The dynamic portion of the filter name, $field, refers to the term field.
1892	*
1893	* @since 2.3.0
1894	*
1895	* @param mixed $value Value of the term field.
1896	* @param string $taxonomy Taxonomy slug.
1897	*/
1898	$value = apply_filters( "term_{$field}_rss", $value, $taxonomy );
1899
1900	/**
1901	* Filter the taxonomy field for use in RSS.
1902	*
1903	* The dynamic portions of the hook name, $taxonomy, and $field, refer
1904	* to the taxonomy slug and field name, respectively.
1905	*
1906	* @since 2.3.0
1907	*
1908	* @param mixed $value Value of the taxonomy field.
1909	*/
1910	$value = apply_filters( "{$taxonomy}_{$field}_rss", $value );
1911	} else {
1912	// Use display filters by default.
1913
1914	/**
1915	* Filter the term field sanitized for display.
1916	*
1917	* The dynamic portion of the filter name, $field, refers to the term field name.
1918	*
1919	* @since 2.3.0
1920	*
1921	* @param mixed $value Value of the term field.
1922	* @param int $term_id Term ID.
1923	* @param string $taxonomy Taxonomy slug.
1924	* @param string $context Context to retrieve the term field value.
1925	*/
1926	$value = apply_filters( "term_{$field}", $value, $term_id, $taxonomy, $context );
1927
1928	/**
1929	* Filter the taxonomy field sanitized for display.
1930	*
1931	* The dynamic portions of the filter name, $taxonomy, and $field, refer
1932	* to the taxonomy slug and taxonomy field, respectively.
1933	*
1934	* @since 2.3.0
1935	*
1936	* @param mixed $value Value of the taxonomy field.
1937	* @param int $term_id Term ID.
1938	* @param string $context Context to retrieve the taxonomy field value.
1939	*/
1940	$value = apply_filters( "{$taxonomy}_{$field}", $value, $term_id, $context );
1941	}
1942
1943	if ( 'attribute' == $context )
1944	$value = esc_attr($value);
1945	else if ( 'js' == $context )
1946	$value = esc_js($value);
1947
1948	return $value;
1949	}
1950
1951	/**
1952	* Count how many terms are in Taxonomy.
1953	*
1954	* Default $args is 'hide_empty' which can be 'hide_empty=true' or array('hide_empty' => true).
1955	*
1956	* @since 2.3.0
1957	*
1958	* @uses get_terms()
1959	* @uses wp_parse_args() Turns strings into arrays and merges defaults into an array.
1960	*
1961	* @param string $taxonomy Taxonomy name
1962	* @param array\|string $args Overwrite defaults. See get_terms()
1963	* @return int\|WP_Error How many terms are in $taxonomy. WP_Error if $taxonomy does not exist.
1964	*/
1965	function wp_count_terms( $taxonomy, $args = array() ) {
1966	$defaults = array('hide_empty' => false);
1967	$args = wp_parse_args($args, $defaults);
1968
1969	// backwards compatibility
1970	if ( isset($args['ignore_empty']) ) {
1971	$args['hide_empty'] = $args['ignore_empty'];
1972	unset($args['ignore_empty']);
1973	}
1974
1975	$args['fields'] = 'count';
1976
1977	return get_terms($taxonomy, $args);
1978	}
1979
1980	/**
1981	* Will unlink the object from the taxonomy or taxonomies.
1982	*
1983	* Will remove all relationships between the object and any terms in
1984	* a particular taxonomy or taxonomies. Does not remove the term or
1985	* taxonomy itself.
1986	*
1987	* @since 2.3.0
1988	* @uses wp_remove_object_terms()
1989	*
1990	* @param int $object_id The term Object Id that refers to the term
1991	* @param string\|array $taxonomies List of Taxonomy Names or single Taxonomy name.
1992	*/
1993	function wp_delete_object_term_relationships( $object_id, $taxonomies ) {
1994	$object_id = (int) $object_id;
1995
1996	if ( !is_array($taxonomies) )
1997	$taxonomies = array($taxonomies);
1998
1999	foreach ( (array) $taxonomies as $taxonomy ) {
2000	$term_ids = wp_get_object_terms( $object_id, $taxonomy, array( 'fields' => 'ids' ) );
2001	$term_ids = array_map( 'intval', $term_ids );
2002	wp_remove_object_terms( $object_id, $term_ids, $taxonomy );
2003	}
2004	}
2005
2006	/**
2007	* Removes a term from the database.
2008	*
2009	* If the term is a parent of other terms, then the children will be updated to
2010	* that term's parent.
2011	*
2012	* The $args 'default' will only override the terms found, if there is only one
2013	* term found. Any other and the found terms are used.
2014	*
2015	* The $args 'force_default' will force the term supplied as default to be
2016	* assigned even if the object was not going to be termless
2017	*
2018	* @since 2.3.0
2019	*
2020	* @uses $wpdb
2021	*
2022	* @param int $term Term ID
2023	* @param string $taxonomy Taxonomy Name
2024	* @param array\|string $args Optional. Change 'default' term id and override found term ids.
2025	* @return bool\|WP_Error Returns false if not term; true if completes delete action.
2026	*/
2027	function wp_delete_term( $term, $taxonomy, $args = array() ) {
2028	global $wpdb;
2029
2030	$term = (int) $term;
2031
2032	if ( ! $ids = term_exists($term, $taxonomy) )
2033	return false;
2034	if ( is_wp_error( $ids ) )
2035	return $ids;
2036
2037	$tt_id = $ids['term_taxonomy_id'];
2038
2039	$defaults = array();
2040
2041	if ( 'category' == $taxonomy ) {
2042	$defaults['default'] = get_option( 'default_category' );
2043	if ( $defaults['default'] == $term )
2044	return 0; // Don't delete the default category
2045	}
2046
2047	$args = wp_parse_args($args, $defaults);
2048
2049	if ( isset( $args['default'] ) ) {
2050	$default = (int) $args['default'];
2051	if ( ! term_exists( $default, $taxonomy ) ) {
2052	unset( $default );
2053	}
2054	}
2055
2056	if ( isset( $args['force_default'] ) ) {
2057	$force_default = $args['force_default'];
2058	}
2059
2060	// Update children to point to new parent
2061	if ( is_taxonomy_hierarchical($taxonomy) ) {
2062	$term_obj = get_term($term, $taxonomy);
2063	if ( is_wp_error( $term_obj ) )
2064	return $term_obj;
2065	$parent = $term_obj->parent;
2066
2067	$edit_tt_ids = $wpdb->get_col( "SELECT `term_taxonomy_id` FROM $wpdb->term_taxonomy WHERE `parent` = " . (int)$term_obj->term_id );
2068
2069	/**
2070	* Fires immediately before a term to delete's children are reassigned a parent.
2071	*
2072	* @since 2.9.0
2073	*
2074	* @param array $edit_tt_ids An array of term taxonomy IDs for the given term.
2075	*/
2076	do_action( 'edit_term_taxonomies', $edit_tt_ids );
2077	$wpdb->update( $wpdb->term_taxonomy, compact( 'parent' ), array( 'parent' => $term_obj->term_id) + compact( 'taxonomy' ) );
2078
2079	/**
2080	* Fires immediately after a term to delete's children are reassigned a parent.
2081	*
2082	* @since 2.9.0
2083	*
2084	* @param array $edit_tt_ids An array of term taxonomy IDs for the given term.
2085	*/
2086	do_action( 'edited_term_taxonomies', $edit_tt_ids );
2087	}
2088
2089	$objects = $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $tt_id ) );
2090
2091	foreach ( (array) $objects as $object ) {
2092	$terms = wp_get_object_terms($object, $taxonomy, array('fields' => 'ids', 'orderby' => 'none'));
2093	if ( 1 == count($terms) && isset($default) ) {
2094	$terms = array($default);
2095	} else {
2096	$terms = array_diff($terms, array($term));
2097	if (isset($default) && isset($force_default) && $force_default)
2098	$terms = array_merge($terms, array($default));
2099	}
2100	$terms = array_map('intval', $terms);
2101	wp_set_object_terms($object, $terms, $taxonomy);
2102	}
2103
2104	// Clean the relationship caches for all object types using this term
2105	$tax_object = get_taxonomy( $taxonomy );
2106	foreach ( $tax_object->object_type as $object_type )
2107	clean_object_term_cache( $objects, $object_type );
2108
2109	// Get the object before deletion so we can pass to actions below
2110	$deleted_term = get_term( $term, $taxonomy );
2111
2112	/**
2113	* Fires immediately before a term taxonomy ID is deleted.
2114	*
2115	* @since 2.9.0
2116	*
2117	* @param int $tt_id Term taxonomy ID.
2118	*/
2119	do_action( 'delete_term_taxonomy', $tt_id );
2120	$wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $tt_id ) );
2121
2122	/**
2123	* Fires immediately after a term taxonomy ID is deleted.
2124	*
2125	* @since 2.9.0
2126	*
2127	* @param int $tt_id Term taxonomy ID.
2128	*/
2129	do_action( 'deleted_term_taxonomy', $tt_id );
2130
2131	// Delete the term if no taxonomies use it.
2132	if ( !$wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE term_id = %d", $term) ) )
2133	$wpdb->delete( $wpdb->terms, array( 'term_id' => $term ) );
2134
2135	clean_term_cache($term, $taxonomy);
2136
2137	/**
2138	* Fires after a term is deleted from the database and the cache is cleaned.
2139	*
2140	* @since 2.5.0
2141	*
2142	* @param int $term Term ID.
2143	* @param int $tt_id Term taxonomy ID.
2144	* @param string $taxonomy Taxonomy slug.
2145	* @param mixed $deleted_term Copy of the already-deleted term, in the form specified
2146	* by the parent function. WP_Error otherwise.
2147	*/
2148	do_action( 'delete_term', $term, $tt_id, $taxonomy, $deleted_term );
2149
2150	/**
2151	* Fires after a term in a specific taxonomy is deleted.
2152	*
2153	* The dynamic portion of the hook name, $taxonomy, refers to the specific
2154	* taxonomy the term belonged to.
2155	*
2156	* @since 2.3.0
2157	*
2158	* @param int $term Term ID.
2159	* @param int $tt_id Term taxonomy ID.
2160	* @param mixed $deleted_term Copy of the already-deleted term, in the form specified
2161	* by the parent function. WP_Error otherwise.
2162	*/
2163	do_action( "delete_$taxonomy", $term, $tt_id, $deleted_term );
2164
2165	return true;
2166	}
2167
2168	/**
2169	* Deletes one existing category.
2170	*
2171	* @since 2.0.0
2172	* @uses wp_delete_term()
2173	*
2174	* @param int $cat_ID
2175	* @return mixed Returns true if completes delete action; false if term doesn't exist;
2176	* Zero on attempted deletion of default Category; WP_Error object is also a possibility.
2177	*/
2178	function wp_delete_category( $cat_ID ) {
2179	return wp_delete_term( $cat_ID, 'category' );
2180	}
2181
2182	/**
2183	* Retrieves the terms associated with the given object(s), in the supplied taxonomies.
2184	*
2185	* The following information has to do the $args parameter and for what can be
2186	* contained in the string or array of that parameter, if it exists.
2187	*
2188	* The first argument is called, 'orderby' and has the default value of 'name'.
2189	* The other value that is supported is 'count'.
2190	*
2191	* The second argument is called, 'order' and has the default value of 'ASC'.
2192	* The only other value that will be acceptable is 'DESC'.
2193	*
2194	* The final argument supported is called, 'fields' and has the default value of
2195	* 'all'. There are multiple other options that can be used instead. Supported
2196	* values are as follows: 'all', 'ids', 'names', and finally
2197	* 'all_with_object_id'.
2198	*
2199	* The fields argument also decides what will be returned. If 'all' or
2200	* 'all_with_object_id' is chosen or the default kept intact, then all matching
2201	* terms objects will be returned. If either 'ids' or 'names' is used, then an
2202	* array of all matching term ids or term names will be returned respectively.
2203	*
2204	* @since 2.3.0
2205	* @uses $wpdb
2206	*
2207	* @param int\|array $object_ids The ID(s) of the object(s) to retrieve.
2208	* @param string\|array $taxonomies The taxonomies to retrieve terms from.
2209	* @param array\|string $args Change what is returned
2210	* @return array\|WP_Error The requested term data or empty array if no terms found. WP_Error if any of the $taxonomies don't exist.
2211	*/
2212	function wp_get_object_terms($object_ids, $taxonomies, $args = array()) {
2213	global $wpdb;
2214
2215	if ( empty( $object_ids ) \|\| empty( $taxonomies ) )
2216	return array();
2217
2218	if ( !is_array($taxonomies) )
2219	$taxonomies = array($taxonomies);
2220
2221	foreach ( $taxonomies as $taxonomy ) {
2222	if ( ! taxonomy_exists($taxonomy) )
2223	return new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
2224	}
2225
2226	if ( !is_array($object_ids) )
2227	$object_ids = array($object_ids);
2228	$object_ids = array_map('intval', $object_ids);
2229
2230	$defaults = array('orderby' => 'name', 'order' => 'ASC', 'fields' => 'all');
2231	$args = wp_parse_args( $args, $defaults );
2232
2233	$terms = array();
2234	if ( count($taxonomies) > 1 ) {
2235	foreach ( $taxonomies as $index => $taxonomy ) {
2236	$t = get_taxonomy($taxonomy);
2237	if ( isset($t->args) && is_array($t->args) && $args != array_merge($args, $t->args) ) {
2238	unset($taxonomies[$index]);
2239	$terms = array_merge($terms, wp_get_object_terms($object_ids, $taxonomy, array_merge($args, $t->args)));
2240	}
2241	}
2242	} else {
2243	$t = get_taxonomy($taxonomies[0]);
2244	if ( isset($t->args) && is_array($t->args) )
2245	$args = array_merge($args, $t->args);
2246	}
2247
2248	$orderby = $args['orderby'];
2249	$order = $args['order'];
2250	$fields = $args['fields'];
2251
2252	if ( 'count' == $orderby )
2253	$orderby = 'tt.count';
2254	else if ( 'name' == $orderby )
2255	$orderby = 't.name';
2256	else if ( 'slug' == $orderby )
2257	$orderby = 't.slug';
2258	else if ( 'term_group' == $orderby )
2259	$orderby = 't.term_group';
2260	else if ( 'term_order' == $orderby )
2261	$orderby = 'tr.term_order';
2262	else if ( 'none' == $orderby ) {
2263	$orderby = '';
2264	$order = '';
2265	} else {
2266	$orderby = 't.term_id';
2267	}
2268
2269	// tt_ids queries can only be none or tr.term_taxonomy_id
2270	if ( ('tt_ids' == $fields) && !empty($orderby) )
2271	$orderby = 'tr.term_taxonomy_id';
2272
2273	if ( !empty($orderby) )
2274	$orderby = "ORDER BY $orderby";
2275
2276	$order = strtoupper( $order );
2277	if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) )
2278	$order = 'ASC';
2279
2280	$taxonomies = "'" . implode("', '", $taxonomies) . "'";
2281	$object_ids = implode(', ', $object_ids);
2282
2283	$select_this = '';
2284	if ( 'all' == $fields )
2285	$select_this = 't., tt.';
2286	else if ( 'ids' == $fields )
2287	$select_this = 't.term_id';
2288	else if ( 'names' == $fields )
2289	$select_this = 't.name';
2290	else if ( 'slugs' == $fields )
2291	$select_this = 't.slug';
2292	else if ( 'all_with_object_id' == $fields )
2293	$select_this = 't., tt., tr.object_id';
2294
2295	$query = "SELECT $select_this FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON tt.term_id = t.term_id INNER JOIN $wpdb->term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tr.object_id IN ($object_ids) $orderby $order";
2296
2297	$objects = false;
2298	if ( 'all' == $fields \|\| 'all_with_object_id' == $fields ) {
2299	$_terms = $wpdb->get_results( $query );
2300	foreach ( $_terms as $key => $term ) {
2301	$_terms[$key] = sanitize_term( $term, $taxonomy, 'raw' );
2302	}
2303	$terms = array_merge( $terms, $_terms );
2304	update_term_cache( $terms );
2305	$objects = true;
2306	} else if ( 'ids' == $fields \|\| 'names' == $fields \|\| 'slugs' == $fields ) {
2307	$_terms = $wpdb->get_col( $query );
2308	$_field = ( 'ids' == $fields ) ? 'term_id' : 'name';
2309	foreach ( $_terms as $key => $term ) {
2310	$_terms[$key] = sanitize_term_field( $_field, $term, $term, $taxonomy, 'raw' );
2311	}
2312	$terms = array_merge( $terms, $_terms );
2313	} else if ( 'tt_ids' == $fields ) {
2314	$terms = $wpdb->get_col("SELECT tr.term_taxonomy_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tr.object_id IN ($object_ids) AND tt.taxonomy IN ($taxonomies) $orderby $order");
2315	foreach ( $terms as $key => $tt_id ) {
2316	$terms[$key] = sanitize_term_field( 'term_taxonomy_id', $tt_id, 0, $taxonomy, 'raw' ); // 0 should be the term id, however is not needed when using raw context.
2317	}
2318	}
2319
2320	if ( ! $terms ) {
2321	$terms = array();
2322	} elseif ( $objects && 'all_with_object_id' !== $fields ) {
2323	$_tt_ids = array();
2324	$_terms = array();
2325	foreach ( $terms as $term ) {
2326	if ( in_array( $term->term_taxonomy_id, $_tt_ids ) ) {
2327	continue;
2328	}
2329
2330	$_tt_ids[] = $term->term_taxonomy_id;
2331	$_terms[] = $term;
2332	}
2333	$terms = $_terms;
2334	} elseif ( ! $objects ) {
2335	$terms = array_values( array_unique( $terms ) );
2336	}
2337	/**
2338	* Filter the terms for a given object or objects.
2339	*
2340	* @since 2.8.0
2341	*
2342	* @param array $terms An array of terms for the given object or objects.
2343	* @param array\|int $object_ids Object ID or array of IDs.
2344	* @param array\|string $taxonomies A taxonomy or array of taxonomies.
2345	* @param array $args An array of arguments for retrieving terms for
2346	* the given object(s).
2347	*/
2348	return apply_filters( 'wp_get_object_terms', $terms, $object_ids, $taxonomies, $args );
2349	}
2350
2351	/**
2352	* Add a new term to the database.
2353	*
2354	* A non-existent term is inserted in the following sequence:
2355	* 1. The term is added to the term table, then related to the taxonomy.
2356	* 2. If everything is correct, several actions are fired.
2357	* 3. The 'term_id_filter' is evaluated.
2358	* 4. The term cache is cleaned.
2359	* 5. Several more actions are fired.
2360	* 6. An array is returned containing the term_id and term_taxonomy_id.
2361	*
2362	* If the 'slug' argument is not empty, then it is checked to see if the term
2363	* is invalid. If it is not a valid, existing term, it is added and the term_id
2364	* is given.
2365	*
2366	* If the taxonomy is hierarchical, and the 'parent' argument is not empty,
2367	* the term is inserted and the term_id will be given.
2368
2369	* Error handling:
2370	* If $taxonomy does not exist or $term is empty,
2371	* a WP_Error object will be returned.
2372	*
2373	* If the term already exists on the same hierarchical level,
2374	* or the term slug and name are not unique, a WP_Error object will be returned.
2375	*
2376	* @global wpdb $wpdb The WordPress database object.
2377
2378	* @since 2.3.0
2379	*
2380	* @param string $term The term to add or update.
2381	* @param string $taxonomy The taxonomy to which to add the term
2382	* @param array\|string $args {
2383	* Arguments to change values of the inserted term.
2384	*
2385	* @type string 'alias_of' Slug of the term to make this term an alias of.
2386	* Default empty string. Accepts a term slug.
2387	* @type string 'description' The term description.
2388	* Default empty string.
2389	* @type int 'parent' The id of the parent term.
2390	* Default 0.
2391	* @type string 'slug' The term slug to use.
2392	* Default empty string.
2393	* }
2394	* @return array\|WP_Error An array containing the term_id and term_taxonomy_id, WP_Error otherwise.
2395	*/
2396	function wp_insert_term( $term, $taxonomy, $args = array() ) {
2397	global $wpdb;
2398
2399	if ( ! taxonomy_exists($taxonomy) ) {
2400	return new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
2401	}
2402	/**
2403	* Filter a term before it is sanitized and inserted into the database.
2404	*
2405	* @since 3.0.0
2406	*
2407	* @param string $term The term to add or update.
2408	* @param string $taxonomy Taxonomy slug.
2409	*/
2410	$term = apply_filters( 'pre_insert_term', $term, $taxonomy );
2411	if ( is_wp_error( $term ) ) {
2412	return $term;
2413	}
2414	if ( is_int($term) && 0 == $term ) {
2415	return new WP_Error('invalid_term_id', __('Invalid term ID'));
2416	}
2417	if ( '' == trim($term) ) {
2418	return new WP_Error('empty_term_name', __('A name is required for this term'));
2419	}
2420	$defaults = array( 'alias_of' => '', 'description' => '', 'parent' => 0, 'slug' => '');
2421	$args = wp_parse_args( $args, $defaults );
2422
2423	if ( $args['parent'] > 0 && ! term_exists( (int) $args['parent'] ) ) {
2424	return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) );
2425	}
2426	$args['name'] = $term;
2427	$args['taxonomy'] = $taxonomy;
2428	$args = sanitize_term($args, $taxonomy, 'db');
2429
2430	// expected_slashed ($name)
2431	$name = wp_unslash( $args['name'] );
2432	$description = wp_unslash( $args['description'] );
2433	$parent = (int) $args['parent'];
2434
2435	$slug_provided = ! empty( $args['slug'] );
2436	if ( ! $slug_provided ) {
2437	$_name = trim( $name );
2438	$existing_term = get_term_by( 'name', $_name, $taxonomy );
2439	if ( $existing_term ) {
2440	$slug = $existing_term->slug;
2441	} else {
2442	$slug = sanitize_title( $name );
2443	}
2444	} else {
2445	$slug = $args['slug'];
2446	}
2447
2448	$term_group = 0;
2449	if ( $args['alias_of'] ) {
2450	$alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $args['alias_of'] ) );
2451	if ( $alias->term_group ) {
2452	// The alias we want is already in a group, so let's use that one.
2453	$term_group = $alias->term_group;
2454	} else {
2455	// The alias isn't in a group, so let's create a new one and firstly add the alias term to it.
2456	$term_group = $wpdb->get_var("SELECT MAX(term_group) FROM $wpdb->terms") + 1;
2457
2458	/**
2459	* Fires immediately before the given terms are edited.
2460	*
2461	* @since 2.9.0
2462	*
2463	* @param int $term_id Term ID.
2464	* @param string $taxonomy Taxonomy slug.
2465	*/
2466	do_action( 'edit_terms', $alias->term_id, $taxonomy );
2467	$wpdb->update($wpdb->terms, compact('term_group'), array('term_id' => $alias->term_id) );
2468
2469	/**
2470	* Fires immediately after the given terms are edited.
2471	*
2472	* @since 2.9.0
2473	*
2474	* @param int $term_id Term ID
2475	* @param string $taxonomy Taxonomy slug.
2476	*/
2477	do_action( 'edited_terms', $alias->term_id, $taxonomy );
2478	}
2479	}
2480
2481	if ( $term_id = term_exists($slug) ) {
2482	$existing_term = $wpdb->get_row( $wpdb->prepare( "SELECT name FROM $wpdb->terms WHERE term_id = %d", $term_id), ARRAY_A );
2483	// We've got an existing term in the same taxonomy, which matches the name of the new term:
2484	if ( is_taxonomy_hierarchical($taxonomy) && $existing_term['name'] == $name && $exists = term_exists( (int) $term_id, $taxonomy ) ) {
2485	// Hierarchical, and it matches an existing term, Do not allow same "name" in the same level.
2486	$siblings = get_terms($taxonomy, array('fields' => 'names', 'get' => 'all', 'parent' => $parent ) );
2487	if ( in_array($name, $siblings) ) {
2488	if ( $slug_provided ) {
2489	return new WP_Error( 'term_exists', __( 'A term with the name and slug provided already exists with this parent.' ), $exists['term_id'] );
2490	} else {
2491	return new WP_Error( 'term_exists', __( 'A term with the name provided already exists with this parent.' ), $exists['term_id'] );
2492	}
2493	} else {
2494	$slug = wp_unique_term_slug($slug, (object) $args);
2495	if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) ) {
2496	return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error);
2497	}
2498	$term_id = (int) $wpdb->insert_id;
2499	}
2500	} elseif ( $existing_term['name'] != $name ) {
2501	// We've got an existing term, with a different name, Create the new term.
2502	$slug = wp_unique_term_slug($slug, (object) $args);
2503	if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) ) {
2504	return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error);
2505	}
2506	$term_id = (int) $wpdb->insert_id;
2507	} elseif ( $exists = term_exists( (int) $term_id, $taxonomy ) ) {
2508	// Same name, same slug.
2509	return new WP_Error( 'term_exists', __( 'A term with the name and slug provided already exists.' ), $exists['term_id'] );
2510	}
2511	} else {
2512	// This term does not exist at all in the database, Create it.
2513	$slug = wp_unique_term_slug($slug, (object) $args);
2514	if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) ) {
2515	return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error);
2516	}
2517	$term_id = (int) $wpdb->insert_id;
2518	}
2519
2520	// Seems unreachable, However, Is used in the case that a term name is provided, which sanitizes to an empty string.
2521	if ( empty($slug) ) {
2522	$slug = sanitize_title($slug, $term_id);
2523
2524	/** This action is documented in wp-includes/taxonomy.php */
2525	do_action( 'edit_terms', $term_id, $taxonomy );
2526	$wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) );
2527
2528	/** This action is documented in wp-includes/taxonomy.php */
2529	do_action( 'edited_terms', $term_id, $taxonomy );
2530	}
2531
2532	$tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id ) );
2533
2534	if ( !empty($tt_id) ) {
2535	return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id);
2536	}
2537	$wpdb->insert( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent') + array( 'count' => 0 ) );
2538	$tt_id = (int) $wpdb->insert_id;
2539
2540	/**
2541	* Fires immediately after a new term is created, before the term cache is cleaned.
2542	*
2543	* @since 2.3.0
2544	*
2545	* @param int $term_id Term ID.
2546	* @param int $tt_id Term taxonomy ID.
2547	* @param string $taxonomy Taxonomy slug.
2548	*/
2549	do_action( "create_term", $term_id, $tt_id, $taxonomy );
2550
2551	/**
2552	* Fires after a new term is created for a specific taxonomy.
2553	*
2554	* The dynamic portion of the hook name, $taxonomy, refers
2555	* to the slug of the taxonomy the term was created for.
2556	*
2557	* @since 2.3.0
2558	*
2559	* @param int $term_id Term ID.
2560	* @param int $tt_id Term taxonomy ID.
2561	*/
2562	do_action( "create_$taxonomy", $term_id, $tt_id );
2563
2564	/**
2565	* Filter the term ID after a new term is created.
2566	*
2567	* @since 2.3.0
2568	*
2569	* @param int $term_id Term ID.
2570	* @param int $tt_id Taxonomy term ID.
2571	*/
2572	$term_id = apply_filters( 'term_id_filter', $term_id, $tt_id );
2573
2574	clean_term_cache($term_id, $taxonomy);
2575
2576	/**
2577	* Fires after a new term is created, and after the term cache has been cleaned.
2578	*
2579	* @since 2.3.0
2580	*/
2581	do_action( "created_term", $term_id, $tt_id, $taxonomy );
2582
2583	/**
2584	* Fires after a new term in a specific taxonomy is created, and after the term
2585	* cache has been cleaned.
2586	*
2587	* @since 2.3.0
2588	*
2589	* @param int $term_id Term ID.
2590	* @param int $tt_id Term taxonomy ID.
2591	*/
2592	do_action( "created_$taxonomy", $term_id, $tt_id );
2593
2594	return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id);
2595	}
2596
2597	/**
2598	* Create Term and Taxonomy Relationships.
2599	*
2600	* Relates an object (post, link etc) to a term and taxonomy type. Creates the
2601	* term and taxonomy relationship if it doesn't already exist. Creates a term if
2602	* it doesn't exist (using the slug).
2603	*
2604	* A relationship means that the term is grouped in or belongs to the taxonomy.
2605	* A term has no meaning until it is given context by defining which taxonomy it
2606	* exists under.
2607	*
2608	* @since 2.3.0
2609	* @uses wp_remove_object_terms()
2610	*
2611	* @param int $object_id The object to relate to.
2612	* @param array\|int\|string $terms A single term slug, single term id, or array of either term slugs or ids.
2613	* Will replace all existing related terms in this taxonomy.
2614	* @param array\|string $taxonomy The context in which to relate the term to the object.
2615	* @param bool $append Optional. If false will delete difference of terms. Default false.
2616	* @return array\|WP_Error Affected Term IDs.
2617	*/
2618	function wp_set_object_terms( $object_id, $terms, $taxonomy, $append = false ) {
2619	global $wpdb;
2620
2621	$object_id = (int) $object_id;
2622
2623	if ( ! taxonomy_exists($taxonomy) )
2624	return new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
2625
2626	if ( !is_array($terms) )
2627	$terms = array($terms);
2628
2629	if ( ! $append )
2630	$old_tt_ids = wp_get_object_terms($object_id, $taxonomy, array('fields' => 'tt_ids', 'orderby' => 'none'));
2631	else
2632	$old_tt_ids = array();
2633
2634	$tt_ids = array();
2635	$term_ids = array();
2636	$new_tt_ids = array();
2637
2638	foreach ( (array) $terms as $term) {
2639	if ( !strlen(trim($term)) )
2640	continue;
2641
2642	if ( !$term_info = term_exists($term, $taxonomy) ) {
2643	// Skip if a non-existent term ID is passed.
2644	if ( is_int($term) )
2645	continue;
2646	$term_info = wp_insert_term($term, $taxonomy);
2647	}
2648	if ( is_wp_error($term_info) )
2649	return $term_info;
2650	$term_ids[] = $term_info['term_id'];
2651	$tt_id = $term_info['term_taxonomy_id'];
2652	$tt_ids[] = $tt_id;
2653
2654	if ( $wpdb->get_var( $wpdb->prepare( "SELECT term_taxonomy_id FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id = %d", $object_id, $tt_id ) ) )
2655	continue;
2656
2657	/**
2658	* Fires immediately before an object-term relationship is added.
2659	*
2660	* @since 2.9.0
2661	*
2662	* @param int $object_id Object ID.
2663	* @param int $tt_id Term taxonomy ID.
2664	*/
2665	do_action( 'add_term_relationship', $object_id, $tt_id );
2666	$wpdb->insert( $wpdb->term_relationships, array( 'object_id' => $object_id, 'term_taxonomy_id' => $tt_id ) );
2667
2668	/**
2669	* Fires immediately after an object-term relationship is added.
2670	*
2671	* @since 2.9.0
2672	*
2673	* @param int $object_id Object ID.
2674	* @param int $tt_id Term taxonomy ID.
2675	*/
2676	do_action( 'added_term_relationship', $object_id, $tt_id );
2677	$new_tt_ids[] = $tt_id;
2678	}
2679
2680	if ( $new_tt_ids )
2681	wp_update_term_count( $new_tt_ids, $taxonomy );
2682
2683	if ( ! $append ) {
2684	$delete_tt_ids = array_diff( $old_tt_ids, $tt_ids );
2685
2686	if ( $delete_tt_ids ) {
2687	$in_delete_tt_ids = "'" . implode( "', '", $delete_tt_ids ) . "'";
2688	$delete_term_ids = $wpdb->get_col( $wpdb->prepare( "SELECT tt.term_id FROM $wpdb->term_taxonomy AS tt WHERE tt.taxonomy = %s AND tt.term_taxonomy_id IN ($in_delete_tt_ids)", $taxonomy ) );
2689	$delete_term_ids = array_map( 'intval', $delete_term_ids );
2690
2691	$remove = wp_remove_object_terms( $object_id, $delete_term_ids, $taxonomy );
2692	if ( is_wp_error( $remove ) ) {
2693	return $remove;
2694	}
2695	}
2696	}
2697
2698	$t = get_taxonomy($taxonomy);
2699	if ( ! $append && isset($t->sort) && $t->sort ) {
2700	$values = array();
2701	$term_order = 0;
2702	$final_tt_ids = wp_get_object_terms($object_id, $taxonomy, array('fields' => 'tt_ids'));
2703	foreach ( $tt_ids as $tt_id )
2704	if ( in_array($tt_id, $final_tt_ids) )
2705	$values[] = $wpdb->prepare( "(%d, %d, %d)", $object_id, $tt_id, ++$term_order);
2706	if ( $values )
2707	if ( false === $wpdb->query( "INSERT INTO $wpdb->term_relationships (object_id, term_taxonomy_id, term_order) VALUES " . join( ',', $values ) . " ON DUPLICATE KEY UPDATE term_order = VALUES(term_order)" ) )
2708	return new WP_Error( 'db_insert_error', __( 'Could not insert term relationship into the database' ), $wpdb->last_error );
2709	}
2710
2711	wp_cache_delete( $object_id, $taxonomy . '_relationships' );
2712
2713	/**
2714	* Fires after an object's terms have been set.
2715	*
2716	* @since 2.8.0
2717	*
2718	* @param int $object_id Object ID.
2719	* @param array $terms An array of object terms.
2720	* @param array $tt_ids An array of term taxonomy IDs.
2721	* @param string $taxonomy Taxonomy slug.
2722	* @param bool $append Whether to append new terms to the old terms.
2723	* @param array $old_tt_ids Old array of term taxonomy IDs.
2724	*/
2725	do_action( 'set_object_terms', $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids );
2726	return $tt_ids;
2727	}
2728
2729	/**
2730	* Add term(s) associated with a given object.
2731	*
2732	* @since 3.6.0
2733	* @uses wp_set_object_terms()
2734	*
2735	* @param int $object_id The ID of the object to which the terms will be added.
2736	* @param array\|int\|string $terms The slug(s) or ID(s) of the term(s) to add.
2737	* @param array\|string $taxonomy Taxonomy name.
2738	* @return array\|WP_Error Affected Term IDs
2739	*/
2740	function wp_add_object_terms( $object_id, $terms, $taxonomy ) {
2741	return wp_set_object_terms( $object_id, $terms, $taxonomy, true );
2742	}
2743
2744	/**
2745	* Remove term(s) associated with a given object.
2746	*
2747	* @since 3.6.0
2748	* @uses $wpdb
2749	*
2750	* @param int $object_id The ID of the object from which the terms will be removed.
2751	* @param array\|int\|string $terms The slug(s) or ID(s) of the term(s) to remove.
2752	* @param array\|string $taxonomy Taxonomy name.
2753	* @return bool\|WP_Error True on success, false or WP_Error on failure.
2754	*/
2755	function wp_remove_object_terms( $object_id, $terms, $taxonomy ) {
2756	global $wpdb;
2757
2758	$object_id = (int) $object_id;
2759
2760	if ( ! taxonomy_exists( $taxonomy ) ) {
2761	return new WP_Error( 'invalid_taxonomy', __( 'Invalid Taxonomy' ) );
2762	}
2763
2764	if ( ! is_array( $terms ) ) {
2765	$terms = array( $terms );
2766	}
2767
2768	$tt_ids = array();
2769
2770	foreach ( (array) $terms as $term ) {
2771	if ( ! strlen( trim( $term ) ) ) {
2772	continue;
2773	}
2774
2775	if ( ! $term_info = term_exists( $term, $taxonomy ) ) {
2776	// Skip if a non-existent term ID is passed.
2777	if ( is_int( $term ) ) {
2778	continue;
2779	}
2780	}
2781
2782	if ( is_wp_error( $term_info ) ) {
2783	return $term_info;
2784	}
2785
2786	$tt_ids[] = $term_info['term_taxonomy_id'];
2787	}
2788
2789	if ( $tt_ids ) {
2790	$in_tt_ids = "'" . implode( "', '", $tt_ids ) . "'";
2791
2792	/**
2793	* Fires immediately before an object-term relationship is deleted.
2794	*
2795	* @since 2.9.0
2796	*
2797	* @param int $object_id Object ID.
2798	* @param array $tt_ids An array of term taxonomy IDs.
2799	*/
2800	do_action( 'delete_term_relationships', $object_id, $tt_ids );
2801	$deleted = $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id IN ($in_tt_ids)", $object_id ) );
2802
2803	/**
2804	* Fires immediately after an object-term relationship is deleted.
2805	*
2806	* @since 2.9.0
2807	*
2808	* @param int $object_id Object ID.
2809	* @param array $tt_ids An array of term taxonomy IDs.
2810	*/
2811	do_action( 'deleted_term_relationships', $object_id, $tt_ids );
2812	wp_update_term_count( $tt_ids, $taxonomy );
2813
2814	return (bool) $deleted;
2815	}
2816
2817	return false;
2818	}
2819
2820	/**
2821	* Will make slug unique, if it isn't already.
2822	*
2823	* The $slug has to be unique global to every taxonomy, meaning that one
2824	* taxonomy term can't have a matching slug with another taxonomy term. Each
2825	* slug has to be globally unique for every taxonomy.
2826	*
2827	* The way this works is that if the taxonomy that the term belongs to is
2828	* hierarchical and has a parent, it will append that parent to the $slug.
2829	*
2830	* If that still doesn't return an unique slug, then it try to append a number
2831	* until it finds a number that is truly unique.
2832	*
2833	* The only purpose for $term is for appending a parent, if one exists.
2834	*
2835	* @since 2.3.0
2836	* @uses $wpdb
2837	*
2838	* @param string $slug The string that will be tried for a unique slug
2839	* @param object $term The term object that the $slug will belong too
2840	* @return string Will return a true unique slug.
2841	*/
2842	function wp_unique_term_slug($slug, $term) {
2843	global $wpdb;
2844
2845	if ( ! term_exists( $slug ) )
2846	return $slug;
2847
2848	// If the taxonomy supports hierarchy and the term has a parent, make the slug unique
2849	// by incorporating parent slugs.
2850	if ( is_taxonomy_hierarchical($term->taxonomy) && !empty($term->parent) ) {
2851	$the_parent = $term->parent;
2852	while ( ! empty($the_parent) ) {
2853	$parent_term = get_term($the_parent, $term->taxonomy);
2854	if ( is_wp_error($parent_term) \|\| empty($parent_term) )
2855	break;
2856	$slug .= '-' . $parent_term->slug;
2857	if ( ! term_exists( $slug ) )
2858	return $slug;
2859
2860	if ( empty($parent_term->parent) )
2861	break;
2862	$the_parent = $parent_term->parent;
2863	}
2864	}
2865
2866	// If we didn't get a unique slug, try appending a number to make it unique.
2867	if ( ! empty( $term->term_id ) )
2868	$query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s AND term_id != %d", $slug, $term->term_id );
2869	else
2870	$query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $slug );
2871
2872	if ( $wpdb->get_var( $query ) ) {
2873	$num = 2;
2874	do {
2875	$alt_slug = $slug . "-$num";
2876	$num++;
2877	$slug_check = $wpdb->get_var( $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $alt_slug ) );
2878	} while ( $slug_check );
2879	$slug = $alt_slug;
2880	}
2881
2882	return $slug;
2883	}
2884
2885	/**
2886	* Update term based on arguments provided.
2887	*
2888	* The $args will indiscriminately override all values with the same field name.
2889	* Care must be taken to not override important information need to update or
2890	* update will fail (or perhaps create a new term, neither would be acceptable).
2891	*
2892	* Defaults will set 'alias_of', 'description', 'parent', and 'slug' if not
2893	* defined in $args already.
2894	*
2895	* 'alias_of' will create a term group, if it doesn't already exist, and update
2896	* it for the $term.
2897	*
2898	* If the 'slug' argument in $args is missing, then the 'name' in $args will be
2899	* used. It should also be noted that if you set 'slug' and it isn't unique then
2900	* a WP_Error will be passed back. If you don't pass any slug, then a unique one
2901	* will be created for you.
2902	*
2903	* For what can be overrode in $args, check the term scheme can contain and stay
2904	* away from the term keys.
2905	*
2906	* @since 2.3.0
2907	*
2908	* @uses $wpdb
2909	*
2910	* @param int $term_id The ID of the term
2911	* @param string $taxonomy The context in which to relate the term to the object.
2912	* @param array\|string $args Overwrite term field values
2913	* @return array\|WP_Error Returns Term ID and Taxonomy Term ID
2914	*/
2915	function wp_update_term( $term_id, $taxonomy, $args = array() ) {
2916	global $wpdb;
2917
2918	if ( ! taxonomy_exists($taxonomy) )
2919	return new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
2920
2921	$term_id = (int) $term_id;
2922
2923	// First, get all of the original args
2924	$term = get_term ($term_id, $taxonomy, ARRAY_A);
2925
2926	if ( is_wp_error( $term ) )
2927	return $term;
2928
2929	// Escape data pulled from DB.
2930	$term = wp_slash($term);
2931
2932	// Merge old and new args with new args overwriting old ones.
2933	$args = array_merge($term, $args);
2934
2935	$defaults = array( 'alias_of' => '', 'description' => '', 'parent' => 0, 'slug' => '');
2936	$args = wp_parse_args($args, $defaults);
2937	$args = sanitize_term($args, $taxonomy, 'db');
2938	$parsed_args = $args;
2939
2940	// expected_slashed ($name)
2941	$name = wp_unslash( $args['name'] );
2942	$description = wp_unslash( $args['description'] );
2943
2944	$parsed_args['name'] = $name;
2945	$parsed_args['description'] = $description;
2946
2947	if ( '' == trim($name) )
2948	return new WP_Error('empty_term_name', __('A name is required for this term'));
2949
2950	$empty_slug = false;
2951	if ( empty( $args['slug'] ) ) {
2952	$empty_slug = true;
2953	$slug = sanitize_title($name);
2954	} else {
2955	$slug = $args['slug'];
2956	}
2957
2958	$parsed_args['slug'] = $slug;
2959
2960	$term_group = isset( $parsed_args['term_group'] ) ? $parsed_args['term_group'] : 0;
2961	if ( $args['alias_of'] ) {
2962	$alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $args['alias_of'] ) );
2963	if ( $alias->term_group ) {
2964	// The alias we want is already in a group, so let's use that one.
2965	$term_group = $alias->term_group;
2966	} else {
2967	// The alias isn't in a group, so let's create a new one and firstly add the alias term to it.
2968	$term_group = $wpdb->get_var("SELECT MAX(term_group) FROM $wpdb->terms") + 1;
2969
2970	/** This action is documented in wp-includes/taxonomy.php */
2971	do_action( 'edit_terms', $alias->term_id, $taxonomy );
2972	$wpdb->update( $wpdb->terms, compact('term_group'), array( 'term_id' => $alias->term_id ) );
2973
2974	/** This action is documented in wp-includes/taxonomy.php */
2975	do_action( 'edited_terms', $alias->term_id, $taxonomy );
2976	}
2977
2978	$parsed_args['term_group'] = $term_group;
2979	}
2980
2981	/**
2982	* Filter the term parent.
2983	*
2984	* Hook to this filter to see if it will cause a hierarchy loop.
2985	*
2986	* @since 3.1.0
2987	*
2988	* @param int $parent ID of the parent term.
2989	* @param int $term_id Term ID.
2990	* @param string $taxonomy Taxonomy slug.
2991	* @param array $parsed_args An array of potentially altered update arguments for the given term.
2992	* @param array $args An array of update arguments for the given term.
2993	*/
2994	$parent = apply_filters( 'wp_update_term_parent', $args['parent'], $term_id, $taxonomy, $parsed_args, $args );
2995
2996	// Check for duplicate slug
2997	$id = $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->terms WHERE slug = %s", $slug ) );
2998	if ( $id && ($id != $term_id) ) {
2999	// If an empty slug was passed or the parent changed, reset the slug to something unique.
3000	// Otherwise, bail.
3001	if ( $empty_slug \|\| ( $parent != $term['parent']) )
3002	$slug = wp_unique_term_slug($slug, (object) $args);
3003	else
3004	return new WP_Error('duplicate_term_slug', sprintf(__('The slug “%s” is already in use by another term'), $slug));
3005	}
3006
3007	/** This action is documented in wp-includes/taxonomy.php */
3008	do_action( 'edit_terms', $term_id, $taxonomy );
3009	$wpdb->update($wpdb->terms, compact( 'name', 'slug', 'term_group' ), compact( 'term_id' ) );
3010	if ( empty($slug) ) {
3011	$slug = sanitize_title($name, $term_id);
3012	$wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) );
3013	}
3014
3015	/** This action is documented in wp-includes/taxonomy.php */
3016	do_action( 'edited_terms', $term_id, $taxonomy );
3017
3018	$tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id) );
3019
3020	/**
3021	* Fires immediate before a term-taxonomy relationship is updated.
3022	*
3023	* @since 2.9.0
3024	*
3025	* @param int $tt_id Term taxonomy ID.
3026	* @param string $taxonomy Taxonomy slug.
3027	*/
3028	do_action( 'edit_term_taxonomy', $tt_id, $taxonomy );
3029	$wpdb->update( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent' ), array( 'term_taxonomy_id' => $tt_id ) );
3030
3031	/**
3032	* Fires immediately after a term-taxonomy relationship is updated.
3033	*
3034	* @since 2.9.0
3035	*
3036	* @param int $tt_id Term taxonomy ID.
3037	* @param string $taxonomy Taxonomy slug.
3038	*/
3039	do_action( 'edited_term_taxonomy', $tt_id, $taxonomy );
3040
3041	// Clean the relationship caches for all object types using this term
3042	$objects = $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $tt_id ) );
3043	$tax_object = get_taxonomy( $taxonomy );
3044	foreach ( $tax_object->object_type as $object_type ) {
3045	clean_object_term_cache( $objects, $object_type );
3046	}
3047
3048	/**
3049	* Fires after a term has been updated, but before the term cache has been cleaned.
3050	*
3051	* @since 2.3.0
3052	*
3053	* @param int $term_id Term ID.
3054	* @param int $tt_id Term taxonomy ID.
3055	* @param string $taxonomy Taxonomy slug.
3056	*/
3057	do_action( "edit_term", $term_id, $tt_id, $taxonomy );
3058
3059	/**
3060	* Fires after a term in a specific taxonomy has been updated, but before the term
3061	* cache has been cleaned.
3062	*
3063	* The dynamic portion of the hook name, $taxonomy, refers to the taxonomy slug.
3064	*
3065	* @since 2.3.0
3066	*
3067	* @param int $term_id Term ID.
3068	* @param int $tt_id Term taxonomy ID.
3069	*/
3070	do_action( "edit_$taxonomy", $term_id, $tt_id );
3071
3072	/** This filter is documented in wp-includes/taxonomy.php */
3073	$term_id = apply_filters( 'term_id_filter', $term_id, $tt_id );
3074
3075	clean_term_cache($term_id, $taxonomy);
3076
3077	/**
3078	* Fires after a term has been updated, and the term cache has been cleaned.
3079	*
3080	* @since 2.3.0
3081	*
3082	* @param int $term_id Term ID.
3083	* @param int $tt_id Term taxonomy ID.
3084	* @param string $taxonomy Taxonomy slug.
3085	*/
3086	do_action( "edited_term", $term_id, $tt_id, $taxonomy );
3087
3088	/**
3089	* Fires after a term for a specific taxonomy has been updated, and the term
3090	* cache has been cleaned.
3091	*
3092	* The dynamic portion of the hook name, $taxonomy, refers to the taxonomy slug.
3093	*
3094	* @since 2.3.0
3095	*
3096	* @param int $term_id Term ID.
3097	* @param int $tt_id Term taxonomy ID.
3098	*/
3099	do_action( "edited_$taxonomy", $term_id, $tt_id );
3100
3101	return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id);
3102	}
3103
3104	/**
3105	* Enable or disable term counting.
3106	*
3107	* @since 2.5.0
3108	*
3109	* @param bool $defer Optional. Enable if true, disable if false.
3110	* @return bool Whether term counting is enabled or disabled.
3111	*/
3112	function wp_defer_term_counting($defer=null) {
3113	static $_defer = false;
3114
3115	if ( is_bool($defer) ) {
3116	$_defer = $defer;
3117	// flush any deferred counts
3118	if ( !$defer )
3119	wp_update_term_count( null, null, true );
3120	}
3121
3122	return $_defer;
3123	}
3124
3125	/**
3126	* Updates the amount of terms in taxonomy.
3127	*
3128	* If there is a taxonomy callback applied, then it will be called for updating
3129	* the count.
3130	*
3131	* The default action is to count what the amount of terms have the relationship
3132	* of term ID. Once that is done, then update the database.
3133	*
3134	* @since 2.3.0
3135	* @uses $wpdb
3136	*
3137	* @param int\|array $terms The term_taxonomy_id of the terms
3138	* @param string $taxonomy The context of the term.
3139	* @return bool If no terms will return false, and if successful will return true.
3140	*/
3141	function wp_update_term_count( $terms, $taxonomy, $do_deferred=false ) {
3142	static $_deferred = array();
3143
3144	if ( $do_deferred ) {
3145	foreach ( (array) array_keys($_deferred) as $tax ) {
3146	wp_update_term_count_now( $_deferred[$tax], $tax );
3147	unset( $_deferred[$tax] );
3148	}
3149	}
3150
3151	if ( empty($terms) )
3152	return false;
3153
3154	if ( !is_array($terms) )
3155	$terms = array($terms);
3156
3157	if ( wp_defer_term_counting() ) {
3158	if ( !isset($_deferred[$taxonomy]) )
3159	$_deferred[$taxonomy] = array();
3160	$_deferred[$taxonomy] = array_unique( array_merge($_deferred[$taxonomy], $terms) );
3161	return true;
3162	}
3163
3164	return wp_update_term_count_now( $terms, $taxonomy );
3165	}
3166
3167	/**
3168	* Perform term count update immediately.
3169	*
3170	* @since 2.5.0
3171	*
3172	* @param array $terms The term_taxonomy_id of terms to update.
3173	* @param string $taxonomy The context of the term.
3174	* @return bool Always true when complete.
3175	*/
3176	function wp_update_term_count_now( $terms, $taxonomy ) {
3177	$terms = array_map('intval', $terms);
3178
3179	$taxonomy = get_taxonomy($taxonomy);
3180	if ( !empty($taxonomy->update_count_callback) ) {
3181	call_user_func($taxonomy->update_count_callback, $terms, $taxonomy);
3182	} else {
3183	$object_types = (array) $taxonomy->object_type;
3184	foreach ( $object_types as &$object_type ) {
3185	if ( 0 === strpos( $object_type, 'attachment:' ) )
3186	list( $object_type ) = explode( ':', $object_type );
3187	}
3188
3189	if ( $object_types == array_filter( $object_types, 'post_type_exists' ) ) {
3190	// Only post types are attached to this taxonomy
3191	_update_post_term_count( $terms, $taxonomy );
3192	} else {
3193	// Default count updater
3194	_update_generic_term_count( $terms, $taxonomy );
3195	}
3196	}
3197
3198	clean_term_cache($terms, '', false);
3199
3200	return true;
3201	}
3202
3203	//
3204	// Cache
3205	//
3206
3207	/**
3208	* Removes the taxonomy relationship to terms from the cache.
3209	*
3210	* Will remove the entire taxonomy relationship containing term $object_id. The
3211	* term IDs have to exist within the taxonomy $object_type for the deletion to
3212	* take place.
3213	*
3214	* @since 2.3.0
3215	*
3216	* @see get_object_taxonomies() for more on $object_type
3217	*
3218	* @param int\|array $object_ids Single or list of term object ID(s)
3219	* @param array\|string $object_type The taxonomy object type
3220	*/
3221	function clean_object_term_cache($object_ids, $object_type) {
3222	if ( !is_array($object_ids) )
3223	$object_ids = array($object_ids);
3224
3225	$taxonomies = get_object_taxonomies( $object_type );
3226
3227	foreach ( $object_ids as $id ) {
3228	foreach ( $taxonomies as $taxonomy ) {
3229	wp_cache_delete($id, "{$taxonomy}_relationships");
3230	}
3231	}
3232
3233	/**
3234	* Fires after the object term cache has been cleaned.
3235	*
3236	* @since 2.5.0
3237	*
3238	* @param array $object_ids An array of object IDs.
3239	* @param string $objet_type Object type.
3240	*/
3241	do_action( 'clean_object_term_cache', $object_ids, $object_type );
3242	}
3243
3244	/**
3245	* Will remove all of the term ids from the cache.
3246	*
3247	* @since 2.3.0
3248	* @uses $wpdb
3249	*
3250	* @param int\|array $ids Single or list of Term IDs
3251	* @param string $taxonomy Can be empty and will assume tt_ids, else will use for context.
3252	* @param bool $clean_taxonomy Whether to clean taxonomy wide caches (true), or just individual term object caches (false). Default is true.
3253	*/
3254	function clean_term_cache($ids, $taxonomy = '', $clean_taxonomy = true) {
3255	global $wpdb;
3256
3257	if ( !is_array($ids) )
3258	$ids = array($ids);
3259
3260	$taxonomies = array();
3261	// If no taxonomy, assume tt_ids.
3262	if ( empty($taxonomy) ) {
3263	$tt_ids = array_map('intval', $ids);
3264	$tt_ids = implode(', ', $tt_ids);
3265	$terms = $wpdb->get_results("SELECT term_id, taxonomy FROM $wpdb->term_taxonomy WHERE term_taxonomy_id IN ($tt_ids)");
3266	$ids = array();
3267	foreach ( (array) $terms as $term ) {
3268	$taxonomies[] = $term->taxonomy;
3269	$ids[] = $term->term_id;
3270	wp_cache_delete($term->term_id, $term->taxonomy);
3271	}
3272	$taxonomies = array_unique($taxonomies);
3273	} else {
3274	$taxonomies = array($taxonomy);
3275	foreach ( $taxonomies as $taxonomy ) {
3276	foreach ( $ids as $id ) {
3277	wp_cache_delete($id, $taxonomy);
3278	}
3279	}
3280	}
3281
3282	foreach ( $taxonomies as $taxonomy ) {
3283	if ( $clean_taxonomy ) {
3284	wp_cache_delete('all_ids', $taxonomy);
3285	wp_cache_delete('get', $taxonomy);
3286	delete_option("{$taxonomy}_children");
3287	// Regenerate {$taxonomy}_children
3288	_get_term_hierarchy($taxonomy);
3289	}
3290
3291	/**
3292	* Fires once after each taxonomy's term cache has been cleaned.
3293	*
3294	* @since 2.5.0
3295	*
3296	* @param array $ids An array of term IDs.
3297	* @param string $taxonomy Taxonomy slug.
3298	*/
3299	do_action( 'clean_term_cache', $ids, $taxonomy );
3300	}
3301
3302	wp_cache_set( 'last_changed', microtime(), 'terms' );
3303	}
3304
3305	/**
3306	* Retrieves the taxonomy relationship to the term object id.
3307	*
3308	* @since 2.3.0
3309	*
3310	* @uses wp_cache_get() Retrieves taxonomy relationship from cache
3311	*
3312	* @param int\|array $id Term object ID
3313	* @param string $taxonomy Taxonomy Name
3314	* @return bool\|array Empty array if $terms found, but not $taxonomy. False if nothing is in cache for $taxonomy and $id.
3315	*/
3316	function get_object_term_cache($id, $taxonomy) {
3317	$cache = wp_cache_get($id, "{$taxonomy}_relationships");
3318	return $cache;
3319	}
3320
3321	/**
3322	* Updates the cache for Term ID(s).
3323	*
3324	* Will only update the cache for terms not already cached.
3325	*
3326	* The $object_ids expects that the ids be separated by commas, if it is a
3327	* string.
3328	*
3329	* It should be noted that update_object_term_cache() is very time extensive. It
3330	* is advised that the function is not called very often or at least not for a
3331	* lot of terms that exist in a lot of taxonomies. The amount of time increases
3332	* for each term and it also increases for each taxonomy the term belongs to.
3333	*
3334	* @since 2.3.0
3335	* @uses wp_get_object_terms() Used to get terms from the database to update
3336	*
3337	* @param string\|array $object_ids Single or list of term object ID(s)
3338	* @param array\|string $object_type The taxonomy object type
3339	* @return null\|bool Null value is given with empty $object_ids. False if
3340	*/
3341	function update_object_term_cache($object_ids, $object_type) {
3342	if ( empty($object_ids) )
3343	return;
3344
3345	if ( !is_array($object_ids) )
3346	$object_ids = explode(',', $object_ids);
3347
3348	$object_ids = array_map('intval', $object_ids);
3349
3350	$taxonomies = get_object_taxonomies($object_type);
3351
3352	$ids = array();
3353	foreach ( (array) $object_ids as $id ) {
3354	foreach ( $taxonomies as $taxonomy ) {
3355	if ( false === wp_cache_get($id, "{$taxonomy}_relationships") ) {
3356	$ids[] = $id;
3357	break;
3358	}
3359	}
3360	}
3361
3362	if ( empty( $ids ) )
3363	return false;
3364
3365	$terms = wp_get_object_terms($ids, $taxonomies, array('fields' => 'all_with_object_id'));
3366
3367	$object_terms = array();
3368	foreach ( (array) $terms as $term )
3369	$object_terms[$term->object_id][$term->taxonomy][$term->term_id] = $term;
3370
3371	foreach ( $ids as $id ) {
3372	foreach ( $taxonomies as $taxonomy ) {
3373	if ( ! isset($object_terms[$id][$taxonomy]) ) {
3374	if ( !isset($object_terms[$id]) )
3375	$object_terms[$id] = array();
3376	$object_terms[$id][$taxonomy] = array();
3377	}
3378	}
3379	}
3380
3381	foreach ( $object_terms as $id => $value ) {
3382	foreach ( $value as $taxonomy => $terms ) {
3383	wp_cache_add( $id, $terms, "{$taxonomy}_relationships" );
3384	}
3385	}
3386	}
3387
3388	/**
3389	* Updates Terms to Taxonomy in cache.
3390	*
3391	* @since 2.3.0
3392	*
3393	* @param array $terms List of Term objects to change
3394	* @param string $taxonomy Optional. Update Term to this taxonomy in cache
3395	*/
3396	function update_term_cache($terms, $taxonomy = '') {
3397	foreach ( (array) $terms as $term ) {
3398	$term_taxonomy = $taxonomy;
3399	if ( empty($term_taxonomy) )
3400	$term_taxonomy = $term->taxonomy;
3401
3402	wp_cache_add($term->term_id, $term, $term_taxonomy);
3403	}
3404	}
3405
3406	//
3407	// Private
3408	//
3409
3410	/**
3411	* Retrieves children of taxonomy as Term IDs.
3412	*
3413	* @access private
3414	* @since 2.3.0
3415	*
3416	* @uses update_option() Stores all of the children in "$taxonomy_children"
3417	* option. That is the name of the taxonomy, immediately followed by '_children'.
3418	*
3419	* @param string $taxonomy Taxonomy Name
3420	* @return array Empty if $taxonomy isn't hierarchical or returns children as Term IDs.
3421	*/
3422	function _get_term_hierarchy($taxonomy) {
3423	if ( !is_taxonomy_hierarchical($taxonomy) )
3424	return array();
3425	$children = get_option("{$taxonomy}_children");
3426
3427	if ( is_array($children) )
3428	return $children;
3429	$children = array();
3430	$terms = get_terms($taxonomy, array('get' => 'all', 'orderby' => 'id', 'fields' => 'id=>parent'));
3431	foreach ( $terms as $term_id => $parent ) {
3432	if ( $parent > 0 )
3433	$children[$parent][] = $term_id;
3434	}
3435	update_option("{$taxonomy}_children", $children);
3436
3437	return $children;
3438	}
3439
3440	/**
3441	* Get the subset of $terms that are descendants of $term_id.
3442	*
3443	* If $terms is an array of objects, then _get_term_children returns an array of objects.
3444	* If $terms is an array of IDs, then _get_term_children returns an array of IDs.
3445	*
3446	* @access private
3447	* @since 2.3.0
3448	*
3449	* @param int $term_id The ancestor term: all returned terms should be descendants of $term_id.
3450	* @param array $terms The set of terms---either an array of term objects or term IDs---from which those that are descendants of $term_id will be chosen.
3451	* @param string $taxonomy The taxonomy which determines the hierarchy of the terms.
3452	* @return array The subset of $terms that are descendants of $term_id.
3453	*/
3454	function _get_term_children($term_id, $terms, $taxonomy) {
3455	$empty_array = array();
3456	if ( empty($terms) )
3457	return $empty_array;
3458
3459	$term_list = array();
3460	$has_children = _get_term_hierarchy($taxonomy);
3461
3462	if ( ( 0 != $term_id ) && ! isset($has_children[$term_id]) )
3463	return $empty_array;
3464
3465	foreach ( (array) $terms as $term ) {
3466	$use_id = false;
3467	if ( !is_object($term) ) {
3468	$term = get_term($term, $taxonomy);
3469	if ( is_wp_error( $term ) )
3470	return $term;
3471	$use_id = true;
3472	}
3473
3474	if ( $term->term_id == $term_id ) {
3475	continue;
3476	}
3477
3478	if ( $term->parent == $term_id ) {
3479	if ( $use_id )
3480	$term_list[] = $term->term_id;
3481	else
3482	$term_list[] = $term;
3483
3484	if ( !isset($has_children[$term->term_id]) )
3485	continue;
3486
3487	if ( $children = _get_term_children($term->term_id, $terms, $taxonomy) )
3488	$term_list = array_merge($term_list, $children);
3489	}
3490	}
3491
3492	return $term_list;
3493	}
3494
3495	/**
3496	* Add count of children to parent count.
3497	*
3498	* Recalculates term counts by including items from child terms. Assumes all
3499	* relevant children are already in the $terms argument.
3500	*
3501	* @access private
3502	* @since 2.3.0
3503	* @uses $wpdb
3504	*
3505	* @param array $terms List of Term IDs
3506	* @param string $taxonomy Term Context
3507	* @return null Will break from function if conditions are not met.
3508	*/
3509	function _pad_term_counts(&$terms, $taxonomy) {
3510	global $wpdb;
3511
3512	// This function only works for hierarchical taxonomies like post categories.
3513	if ( !is_taxonomy_hierarchical( $taxonomy ) )
3514	return;
3515
3516	$term_hier = _get_term_hierarchy($taxonomy);
3517
3518	if ( empty($term_hier) )
3519	return;
3520
3521	$term_items = array();
3522
3523	foreach ( (array) $terms as $key => $term ) {
3524	$terms_by_id[$term->term_id] = & $terms[$key];
3525	$term_ids[$term->term_taxonomy_id] = $term->term_id;
3526	}
3527
3528	// Get the object and term ids and stick them in a lookup table
3529	$tax_obj = get_taxonomy($taxonomy);
3530	$object_types = esc_sql($tax_obj->object_type);
3531	$results = $wpdb->get_results("SELECT object_id, term_taxonomy_id FROM $wpdb->term_relationships INNER JOIN $wpdb->posts ON object_id = ID WHERE term_taxonomy_id IN (" . implode(',', array_keys($term_ids)) . ") AND post_type IN ('" . implode("', '", $object_types) . "') AND post_status = 'publish'");
3532	foreach ( $results as $row ) {
3533	$id = $term_ids[$row->term_taxonomy_id];
3534	$term_items[$id][$row->object_id] = isset($term_items[$id][$row->object_id]) ? ++$term_items[$id][$row->object_id] : 1;
3535	}
3536
3537	// Touch every ancestor's lookup row for each post in each term
3538	foreach ( $term_ids as $term_id ) {
3539	$child = $term_id;
3540	while ( !empty( $terms_by_id[$child] ) && $parent = $terms_by_id[$child]->parent ) {
3541	if ( !empty( $term_items[$term_id] ) )
3542	foreach ( $term_items[$term_id] as $item_id => $touches ) {
3543	$term_items[$parent][$item_id] = isset($term_items[$parent][$item_id]) ? ++$term_items[$parent][$item_id]: 1;
3544	}
3545	$child = $parent;
3546	}
3547	}
3548
3549	// Transfer the touched cells
3550	foreach ( (array) $term_items as $id => $items )
3551	if ( isset($terms_by_id[$id]) )
3552	$terms_by_id[$id]->count = count($items);
3553	}
3554
3555	//
3556	// Default callbacks
3557	//
3558
3559	/**
3560	* Will update term count based on object types of the current taxonomy.
3561	*
3562	* Private function for the default callback for post_tag and category
3563	* taxonomies.
3564	*
3565	* @access private
3566	* @since 2.3.0
3567	* @uses $wpdb
3568	*
3569	* @param array $terms List of Term taxonomy IDs
3570	* @param object $taxonomy Current taxonomy object of terms
3571	*/
3572	function _update_post_term_count( $terms, $taxonomy ) {
3573	global $wpdb;
3574
3575	$object_types = (array) $taxonomy->object_type;
3576
3577	foreach ( $object_types as &$object_type )
3578	list( $object_type ) = explode( ':', $object_type );
3579
3580	$object_types = array_unique( $object_types );
3581
3582	if ( false !== ( $check_attachments = array_search( 'attachment', $object_types ) ) ) {
3583	unset( $object_types[ $check_attachments ] );
3584	$check_attachments = true;
3585	}
3586
3587	if ( $object_types )
3588	$object_types = esc_sql( array_filter( $object_types, 'post_type_exists' ) );
3589
3590	foreach ( (array) $terms as $term ) {
3591	$count = 0;
3592
3593	// Attachments can be 'inherit' status, we need to base count off the parent's status if so
3594	if ( $check_attachments )
3595	$count += (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts p1 WHERE p1.ID = $wpdb->term_relationships.object_id AND ( post_status = 'publish' OR ( post_status = 'inherit' AND post_parent > 0 AND ( SELECT post_status FROM $wpdb->posts WHERE ID = p1.post_parent ) = 'publish' ) ) AND post_type = 'attachment' AND term_taxonomy_id = %d", $term ) );
3596
3597	if ( $object_types )
3598	$count += (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts WHERE $wpdb->posts.ID = $wpdb->term_relationships.object_id AND post_status = 'publish' AND post_type IN ('" . implode("', '", $object_types ) . "') AND term_taxonomy_id = %d", $term ) );
3599
3600	/** This action is documented in wp-includes/taxonomy.php */
3601	do_action( 'edit_term_taxonomy', $term, $taxonomy );
3602	$wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) );
3603
3604	/** This action is documented in wp-includes/taxonomy.php */
3605	do_action( 'edited_term_taxonomy', $term, $taxonomy );
3606	}
3607	}
3608
3609	/**
3610	* Will update term count based on number of objects.
3611	*
3612	* Default callback for the link_category taxonomy.
3613	*
3614	* @since 3.3.0
3615	* @uses $wpdb
3616	*
3617	* @param array $terms List of Term taxonomy IDs
3618	* @param object $taxonomy Current taxonomy object of terms
3619	*/
3620	function _update_generic_term_count( $terms, $taxonomy ) {
3621	global $wpdb;
3622
3623	foreach ( (array) $terms as $term ) {
3624	$count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term ) );
3625
3626	/** This action is documented in wp-includes/taxonomy.php */
3627	do_action( 'edit_term_taxonomy', $term, $taxonomy );
3628	$wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) );
3629
3630	/** This action is documented in wp-includes/taxonomy.php */
3631	do_action( 'edited_term_taxonomy', $term, $taxonomy );
3632	}
3633	}
3634
3635	/**
3636	* Generates a permalink for a taxonomy term archive.
3637	*
3638	* @since 2.5.0
3639	*
3640	* @param object\|int\|string $term
3641	* @param string $taxonomy (optional if $term is object)
3642	* @return string\|WP_Error HTML link to taxonomy term archive on success, WP_Error if term does not exist.
3643	*/
3644	function get_term_link( $term, $taxonomy = '') {
3645	global $wp_rewrite;
3646
3647	if ( !is_object($term) ) {
3648	if ( is_int($term) ) {
3649	$term = get_term($term, $taxonomy);
3650	} else {
3651	$term = get_term_by('slug', $term, $taxonomy);
3652	}
3653	}
3654
3655	if ( !is_object($term) )
3656	$term = new WP_Error('invalid_term', __('Empty Term'));
3657
3658	if ( is_wp_error( $term ) )
3659	return $term;
3660
3661	$taxonomy = $term->taxonomy;
3662
3663	$termlink = $wp_rewrite->get_extra_permastruct($taxonomy);
3664
3665	$slug = $term->slug;
3666	$t = get_taxonomy($taxonomy);
3667
3668	if ( empty($termlink) ) {
3669	if ( 'category' == $taxonomy )
3670	$termlink = '?cat=' . $term->term_id;
3671	elseif ( $t->query_var )
3672	$termlink = "?$t->query_var=$slug";
3673	else
3674	$termlink = "?taxonomy=$taxonomy&term=$slug";
3675	$termlink = home_url($termlink);
3676	} else {
3677	if ( $t->rewrite['hierarchical'] ) {
3678	$hierarchical_slugs = array();
3679	$ancestors = get_ancestors($term->term_id, $taxonomy);
3680	foreach ( (array)$ancestors as $ancestor ) {
3681	$ancestor_term = get_term($ancestor, $taxonomy);
3682	$hierarchical_slugs[] = $ancestor_term->slug;
3683	}
3684	$hierarchical_slugs = array_reverse($hierarchical_slugs);
3685	$hierarchical_slugs[] = $slug;
3686	$termlink = str_replace("%$taxonomy%", implode('/', $hierarchical_slugs), $termlink);
3687	} else {
3688	$termlink = str_replace("%$taxonomy%", $slug, $termlink);
3689	}
3690	$termlink = home_url( user_trailingslashit($termlink, 'category') );
3691	}
3692	// Back Compat filters.
3693	if ( 'post_tag' == $taxonomy ) {
3694
3695	/**
3696	* Filter the tag link.
3697	*
3698	* @since 2.3.0
3699	* @deprecated 2.5.0 Use 'term_link' instead.
3700	*
3701	* @param string $termlink Tag link URL.
3702	* @param int $term_id Term ID.
3703	*/
3704	$termlink = apply_filters( 'tag_link', $termlink, $term->term_id );
3705	} elseif ( 'category' == $taxonomy ) {
3706
3707	/**
3708	* Filter the category link.
3709	*
3710	* @since 1.5.0
3711	* @deprecated 2.5.0 Use 'term_link' instead.
3712	*
3713	* @param string $termlink Category link URL.
3714	* @param int $term_id Term ID.
3715	*/
3716	$termlink = apply_filters( 'category_link', $termlink, $term->term_id );
3717	}
3718
3719	/**
3720	* Filter the term link.
3721	*
3722	* @since 2.5.0
3723	*
3724	* @param string $termlink Term link URL.
3725	* @param object $term Term object.
3726	* @param string $taxonomy Taxonomy slug.
3727	*/
3728	return apply_filters( 'term_link', $termlink, $term, $taxonomy );
3729	}
3730
3731	/**
3732	* Display the taxonomies of a post with available options.
3733	*
3734	* This function can be used within the loop to display the taxonomies for a
3735	* post without specifying the Post ID. You can also use it outside the Loop to
3736	* display the taxonomies for a specific post.
3737	*
3738	* The available defaults are:
3739	* 'post' : default is 0. The post ID to get taxonomies of.
3740	* 'before' : default is empty string. Display before taxonomies list.
3741	* 'sep' : default is empty string. Separate every taxonomy with value in this.
3742	* 'after' : default is empty string. Display this after the taxonomies list.
3743	* 'template' : The template to use for displaying the taxonomy terms.
3744	*
3745	* @since 2.5.0
3746	* @uses get_the_taxonomies()
3747	*
3748	* @param array $args Override the defaults.
3749	*/
3750	function the_taxonomies( $args = array() ) {
3751	$defaults = array(
3752	'post' => 0,
3753	'before' => '',
3754	'sep' => ' ',
3755	'after' => '',
3756	/* translators: %s: taxonomy label, %l: list of term links */
3757	'template' => __( '%s: %l.' )
3758	);
3759
3760	$r = wp_parse_args( $args, $defaults );
3761
3762	echo $r['before'] . join( $r['sep'], get_the_taxonomies( $r['post'], $r ) ) . $r['after'];
3763	}
3764
3765	/**
3766	* Retrieve all taxonomies associated with a post.
3767	*
3768	* This function can be used within the loop. It will also return an array of
3769	* the taxonomies with links to the taxonomy and name.
3770	*
3771	* @since 2.5.0
3772	*
3773	* @param int\|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
3774	* @param array $args Override the defaults.
3775	* @return array List of taxonomies.
3776	*/
3777	function get_the_taxonomies( $post = 0, $args = array() ) {
3778	$post = get_post( $post );
3779
3780	$args = wp_parse_args( $args, array(
3781	/* translators: %s: taxonomy label, %l: list of term links */
3782	'template' => __( '%s: %l.' ),
3783	) );
3784
3785	$taxonomies = array();
3786
3787	if ( ! $post ) {
3788	return $taxonomies;
3789	}
3790
3791	foreach ( get_object_taxonomies( $post ) as $taxonomy ) {
3792	$t = (array) get_taxonomy( $taxonomy );
3793	if ( empty( $t['label'] ) ) {
3794	$t['label'] = $taxonomy;
3795	}
3796	if ( empty( $t['args'] ) ) {
3797	$t['args'] = array();
3798	}
3799	if ( empty( $t['template'] ) ) {
3800	$t['template'] = $args['template'];
3801	}
3802
3803	$terms = get_object_term_cache( $post->ID, $taxonomy );
3804	if ( false === $terms ) {
3805	$terms = wp_get_object_terms( $post->ID, $taxonomy, $t['args'] );
3806	}
3807	$links = array();
3808
3809	foreach ( $terms as $term ) {
3810	$links[] = "<a href='" . esc_attr( get_term_link( $term ) ) . "'>$term->name</a>";
3811	}
3812	if ( $links ) {
3813	$taxonomies[$taxonomy] = wp_sprintf( $t['template'], $t['label'], $links, $terms );
3814	}
3815	}
3816	return $taxonomies;
3817	}
3818
3819	/**
3820	* Retrieve all taxonomies of a post with just the names.
3821	*
3822	* @since 2.5.0
3823	*
3824	* @uses get_object_taxonomies()
3825	*
3826	* @param int\|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
3827	* @return array
3828	*/
3829	function get_post_taxonomies( $post = 0 ) {
3830	$post = get_post( $post );
3831
3832	return get_object_taxonomies($post);
3833	}
3834
3835	/**
3836	* Determine if the given object is associated with any of the given terms.
3837	*
3838	* The given terms are checked against the object's terms' term_ids, names and slugs.
3839	* Terms given as integers will only be checked against the object's terms' term_ids.
3840	* If no terms are given, determines if object is associated with any terms in the given taxonomy.
3841	*
3842	* @since 2.7.0
3843	* @uses get_object_term_cache()
3844	* @uses wp_get_object_terms()
3845	*
3846	* @param int $object_id ID of the object (post ID, link ID, ...)
3847	* @param string $taxonomy Single taxonomy name
3848	* @param int\|string\|array $terms Optional. Term term_id, name, slug or array of said
3849	* @return bool\|WP_Error. WP_Error on input error.
3850	*/
3851	function is_object_in_term( $object_id, $taxonomy, $terms = null ) {
3852	if ( !$object_id = (int) $object_id )
3853	return new WP_Error( 'invalid_object', __( 'Invalid object ID' ) );
3854
3855	$object_terms = get_object_term_cache( $object_id, $taxonomy );
3856	if ( false === $object_terms )
3857	$object_terms = wp_get_object_terms( $object_id, $taxonomy );
3858
3859	if ( is_wp_error( $object_terms ) )
3860	return $object_terms;
3861	if ( empty( $object_terms ) )
3862	return false;
3863	if ( empty( $terms ) )
3864	return ( !empty( $object_terms ) );
3865
3866	$terms = (array) $terms;
3867
3868	if ( $ints = array_filter( $terms, 'is_int' ) )
3869	$strs = array_diff( $terms, $ints );
3870	else
3871	$strs =& $terms;
3872
3873	foreach ( $object_terms as $object_term ) {
3874	if ( $ints && in_array( $object_term->term_id, $ints ) ) return true; // If int, check against term_id
3875	if ( $strs ) {
3876	if ( in_array( $object_term->term_id, $strs ) ) return true;
3877	if ( in_array( $object_term->name, $strs ) ) return true;
3878	if ( in_array( $object_term->slug, $strs ) ) return true;
3879	}
3880	}
3881
3882	return false;
3883	}
3884
3885	/**
3886	* Determine if the given object type is associated with the given taxonomy.
3887	*
3888	* @since 3.0.0
3889	* @uses get_object_taxonomies()
3890	*
3891	* @param string $object_type Object type string
3892	* @param string $taxonomy Single taxonomy name
3893	* @return bool True if object is associated with the taxonomy, otherwise false.
3894	*/
3895	function is_object_in_taxonomy($object_type, $taxonomy) {
3896	$taxonomies = get_object_taxonomies($object_type);
3897
3898	if ( empty($taxonomies) )
3899	return false;
3900
3901	if ( in_array($taxonomy, $taxonomies) )
3902	return true;
3903
3904	return false;
3905	}
3906
3907	/**
3908	* Get an array of ancestor IDs for a given object.
3909	*
3910	* @param int $object_id The ID of the object
3911	* @param string $object_type The type of object for which we'll be retrieving ancestors.
3912	* @return array of ancestors from lowest to highest in the hierarchy.
3913	*/
3914	function get_ancestors($object_id = 0, $object_type = '') {
3915	$object_id = (int) $object_id;
3916
3917	$ancestors = array();
3918
3919	if ( empty( $object_id ) ) {
3920
3921	/** This filter is documented in wp-includes/taxonomy.php */
3922	return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type );
3923	}
3924
3925	if ( is_taxonomy_hierarchical( $object_type ) ) {
3926	$term = get_term($object_id, $object_type);
3927	while ( ! is_wp_error($term) && ! empty( $term->parent ) && ! in_array( $term->parent, $ancestors ) ) {
3928	$ancestors[] = (int) $term->parent;
3929	$term = get_term($term->parent, $object_type);
3930	}
3931	} elseif ( post_type_exists( $object_type ) ) {
3932	$ancestors = get_post_ancestors($object_id);
3933	}
3934
3935	/**
3936	* Filter a given object's ancestors.
3937	*
3938	* @since 3.1.0
3939	*
3940	* @param array $ancestors An array of object ancestors.
3941	* @param int $object_id Object ID.
3942	* @param string $object_type Type of object.
3943	*/
3944	return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type );
3945	}
3946
3947	/**
3948	* Returns the term's parent's term_ID
3949	*
3950	* @since 3.1.0
3951	*
3952	* @param int $term_id
3953	* @param string $taxonomy
3954	*
3955	* @return int\|bool false on error
3956	*/
3957	function wp_get_term_taxonomy_parent_id( $term_id, $taxonomy ) {
3958	$term = get_term( $term_id, $taxonomy );
3959	if ( !$term \|\| is_wp_error( $term ) )
3960	return false;
3961	return (int) $term->parent;
3962	}
3963
3964	/**
3965	* Checks the given subset of the term hierarchy for hierarchy loops.
3966	* Prevents loops from forming and breaks those that it finds.
3967	*
3968	* Attached to the wp_update_term_parent filter.
3969	*
3970	* @since 3.1.0
3971	* @uses wp_find_hierarchy_loop()
3972	*
3973	* @param int $parent term_id of the parent for the term we're checking.
3974	* @param int $term_id The term we're checking.
3975	* @param string $taxonomy The taxonomy of the term we're checking.
3976	*
3977	* @return int The new parent for the term.
3978	*/
3979	function wp_check_term_hierarchy_for_loops( $parent, $term_id, $taxonomy ) {
3980	// Nothing fancy here - bail
3981	if ( !$parent )
3982	return 0;
3983
3984	// Can't be its own parent
3985	if ( $parent == $term_id )
3986	return 0;
3987
3988	// Now look for larger loops
3989
3990	if ( !$loop = wp_find_hierarchy_loop( 'wp_get_term_taxonomy_parent_id', $term_id, $parent, array( $taxonomy ) ) )
3991	return $parent; // No loop
3992
3993	// Setting $parent to the given value causes a loop
3994	if ( isset( $loop[$term_id] ) )
3995	return 0;
3996
3997	// There's a loop, but it doesn't contain $term_id. Break the loop.
3998	foreach ( array_keys( $loop ) as $loop_member )
3999	wp_update_term( $loop_member, $taxonomy, array( 'parent' => 0 ) );
4000
4001	return $parent;
4002	}

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Ticket #29894: taxonomy.php

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