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<?php
/**
* Core Taxonomy API
*
* @package WordPress
* @subpackage Taxonomy
*/
//
// Taxonomy Registration
//
/**
* Creates the initial taxonomies.
*
* This function fires twice: in wp-settings.php before plugins are loaded (for
* backward compatibility reasons), and again on the {@see 'init'} action. We must
* avoid registering rewrite rules before the {@see 'init'} action.
*
* @since 2.8.0
*
* @global WP_Rewrite $wp_rewrite The WordPress rewrite class.
*/
function create_initial_taxonomies() {
global $wp_rewrite;
if ( ! did_action( 'init' ) ) {
$rewrite = array(
'category' => false,
'post_tag' => false,
'post_format' => false,
);
} else {
/**
* Filters the post formats rewrite base.
*
* @since 3.1.0
*
* @param string $context Context of the rewrite base. Default 'type'.
*/
$post_format_base = apply_filters( 'post_format_rewrite_base', 'type' );
$rewrite = array(
'category' => array(
'hierarchical' => true,
'slug' => get_option( 'category_base' ) ? get_option( 'category_base' ) : 'category',
'with_front' => ! get_option( 'category_base' ) || $wp_rewrite->using_index_permalinks(),
'ep_mask' => EP_CATEGORIES,
),
'post_tag' => array(
'hierarchical' => false,
'slug' => get_option( 'tag_base' ) ? get_option( 'tag_base' ) : 'tag',
'with_front' => ! get_option( 'tag_base' ) || $wp_rewrite->using_index_permalinks(),
'ep_mask' => EP_TAGS,
),
'post_format' => $post_format_base ? array( 'slug' => $post_format_base ) : false,
);
}
register_taxonomy(
'category',
'post',
array(
'hierarchical' => true,
'query_var' => 'category_name',
'rewrite' => $rewrite['category'],
'public' => true,
'show_ui' => true,
'show_admin_column' => true,
'_builtin' => true,
'capabilities' => array(
'manage_terms' => 'manage_categories',
'edit_terms' => 'edit_categories',
'delete_terms' => 'delete_categories',
'assign_terms' => 'assign_categories',
),
'show_in_rest' => true,
'rest_base' => 'categories',
'rest_controller_class' => 'WP_REST_Terms_Controller',
)
);
register_taxonomy(
'post_tag',
'post',
array(
'hierarchical' => false,
'query_var' => 'tag',
'rewrite' => $rewrite['post_tag'],
'public' => true,
'show_ui' => true,
'show_admin_column' => true,
'_builtin' => true,
'capabilities' => array(
'manage_terms' => 'manage_post_tags',
'edit_terms' => 'edit_post_tags',
'delete_terms' => 'delete_post_tags',
'assign_terms' => 'assign_post_tags',
),
'show_in_rest' => true,
'rest_base' => 'tags',
'rest_controller_class' => 'WP_REST_Terms_Controller',
)
);
register_taxonomy(
'nav_menu',
'nav_menu_item',
array(
'public' => false,
'hierarchical' => false,
'labels' => array(
'name' => __( 'Navigation Menus' ),
'singular_name' => __( 'Navigation Menu' ),
),
'query_var' => false,
'rewrite' => false,
'show_ui' => false,
'_builtin' => true,
'show_in_nav_menus' => false,
)
);
register_taxonomy(
'link_category',
'link',
array(
'hierarchical' => false,
'labels' => array(
'name' => __( 'Link Categories' ),
'singular_name' => __( 'Link Category' ),
'search_items' => __( 'Search Link Categories' ),
'popular_items' => null,
'all_items' => __( 'All Link Categories' ),
'edit_item' => __( 'Edit Link Category' ),
'update_item' => __( 'Update Link Category' ),
'add_new_item' => __( 'Add New Link Category' ),
'new_item_name' => __( 'New Link Category Name' ),
'separate_items_with_commas' => null,
'add_or_remove_items' => null,
'choose_from_most_used' => null,
'back_to_items' => __( '&larr; Back to Link Categories' ),
),
'capabilities' => array(
'manage_terms' => 'manage_links',
'edit_terms' => 'manage_links',
'delete_terms' => 'manage_links',
'assign_terms' => 'manage_links',
),
'query_var' => false,
'rewrite' => false,
'public' => false,
'show_ui' => true,
'_builtin' => true,
)
);
register_taxonomy(
'post_format',
'post',
array(
'public' => true,
'hierarchical' => false,
'labels' => array(
'name' => _x( 'Formats', 'post format' ),
'singular_name' => _x( 'Format', 'post format' ),
),
'query_var' => true,
'rewrite' => $rewrite['post_format'],
'show_ui' => false,
'_builtin' => true,
'show_in_nav_menus' => current_theme_supports( 'post-formats' ),
)
);
}
/**
* Retrieves a list of registered taxonomy names or objects.
*
* @since 3.0.0
*
* @global array $wp_taxonomies The registered taxonomies.
*
* @param array $args Optional. An array of `key => value` arguments to match against the taxonomy objects.
* Default empty array.
* @param string $output Optional. The type of output to return in the array. Accepts either taxonomy 'names'
* or 'objects'. Default 'names'.
* @param string $operator Optional. The logical operation to perform. Accepts 'and' or 'or'. 'or' means only
* one element from the array needs to match; 'and' means all elements must match.
* Default 'and'.
* @return string[]|WP_Taxonomy[] An array of taxonomy names or objects.
*/
function get_taxonomies( $args = array(), $output = 'names', $operator = 'and' ) {
global $wp_taxonomies;
$field = ( 'names' == $output ) ? 'name' : false;
return wp_filter_object_list( $wp_taxonomies, $args, $operator, $field );
}
/**
* Return the names or objects of the taxonomies which are registered for the requested object or object type, such as
* a post object or post type name.
*
* Example:
*
* $taxonomies = get_object_taxonomies( 'post' );
*
* This results in:
*
* Array( 'category', 'post_tag' )
*
* @since 2.3.0
*
* @global array $wp_taxonomies The registered taxonomies.
*
* @param array|string|WP_Post $object Name of the type of taxonomy object, or an object (row from posts)
* @param string $output Optional. The type of output to return in the array. Accepts either
* taxonomy 'names' or 'objects'. Default 'names'.
* @return array The names of all taxonomy of $object_type.
*/
function get_object_taxonomies( $object, $output = 'names' ) {
global $wp_taxonomies;
if ( is_object( $object ) ) {
if ( $object->post_type == 'attachment' ) {
return get_attachment_taxonomies( $object, $output );
}
$object = $object->post_type;
}
$object = (array) $object;
$taxonomies = array();
foreach ( (array) $wp_taxonomies as $tax_name => $tax_obj ) {
if ( array_intersect( $object, (array) $tax_obj->object_type ) ) {
if ( 'names' == $output ) {
$taxonomies[] = $tax_name;
} else {
$taxonomies[ $tax_name ] = $tax_obj;
}
}
}
return $taxonomies;
}
/**
* Retrieves the taxonomy object of $taxonomy.
*
* The get_taxonomy function will first check that the parameter string given
* is a taxonomy object and if it is, it will return it.
*
* @since 2.3.0
*
* @global array $wp_taxonomies The registered taxonomies.
*
* @param string $taxonomy Name of taxonomy object to return.
* @return WP_Taxonomy|false The Taxonomy Object or false if $taxonomy doesn't exist.
*/
function get_taxonomy( $taxonomy ) {
global $wp_taxonomies;
if ( ! taxonomy_exists( $taxonomy ) ) {
return false;
}
return $wp_taxonomies[ $taxonomy ];
}
/**
* Determines whether the taxonomy name exists.
*
* Formerly is_taxonomy(), introduced in 2.3.0.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @since 3.0.0
*
* @global array $wp_taxonomies The registered taxonomies.
*
* @param string $taxonomy Name of taxonomy object.
* @return bool Whether the taxonomy exists.
*/
function taxonomy_exists( $taxonomy ) {
global $wp_taxonomies;
return isset( $wp_taxonomies[ $taxonomy ] );
}
/**
* Determines whether the taxonomy object is hierarchical.
*
* Checks to make sure that the taxonomy is an object first. Then Gets the
* object, and finally returns the hierarchical value in the object.
*
* A false return value might also mean that the taxonomy does not exist.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @since 2.3.0
*
* @param string $taxonomy Name of taxonomy object.
* @return bool Whether the taxonomy is hierarchical.
*/
function is_taxonomy_hierarchical( $taxonomy ) {
if ( ! taxonomy_exists( $taxonomy ) ) {
return false;
}
$taxonomy = get_taxonomy( $taxonomy );
return $taxonomy->hierarchical;
}
/**
* Creates or modifies a taxonomy object.
*
* Note: Do not use before the {@see 'init'} hook.
*
* A simple function for creating or modifying a taxonomy object based on
* the parameters given. If modifying an existing taxonomy object, note
* that the `$object_type` value from the original registration will be
* overwritten.
*
* @since 2.3.0
* @since 4.2.0 Introduced `show_in_quick_edit` argument.
* @since 4.4.0 The `show_ui` argument is now enforced on the term editing screen.
* @since 4.4.0 The `public` argument now controls whether the taxonomy can be queried on the front end.
* @since 4.5.0 Introduced `publicly_queryable` argument.
* @since 4.7.0 Introduced `show_in_rest`, 'rest_base' and 'rest_controller_class'
* arguments to register the Taxonomy in REST API.
* @since 5.0.0 Introduced `meta_box_sanitize_cb` argument.
*
* @global array $wp_taxonomies Registered taxonomies.
*
* @param string $taxonomy Taxonomy key, must not exceed 32 characters.
* @param array|string $object_type Object type or array of object types with which the taxonomy should be associated.
* @param array|string $args {
* Optional. Array or query string of arguments for registering a taxonomy.
*
* @type array $labels An array of labels for this taxonomy. By default, Tag labels are
* used for non-hierarchical taxonomies, and Category labels are used
* for hierarchical taxonomies. See accepted values in
* get_taxonomy_labels(). Default empty array.
* @type string $description A short descriptive summary of what the taxonomy is for. Default empty.
* @type bool $public Whether a taxonomy is intended for use publicly either via
* the admin interface or by front-end users. The default settings
* of `$publicly_queryable`, `$show_ui`, and `$show_in_nav_menus`
* are inherited from `$public`.
* @type bool $publicly_queryable Whether the taxonomy is publicly queryable.
* If not set, the default is inherited from `$public`
* @type bool $hierarchical Whether the taxonomy is hierarchical. Default false.
* @type bool $show_ui Whether to generate and allow a UI for managing terms in this taxonomy in
* the admin. If not set, the default is inherited from `$public`
* (default true).
* @type bool $show_in_menu Whether to show the taxonomy in the admin menu. If true, the taxonomy is
* shown as a submenu of the object type menu. If false, no menu is shown.
* `$show_ui` must be true. If not set, default is inherited from `$show_ui`
* (default true).
* @type bool $show_in_nav_menus Makes this taxonomy available for selection in navigation menus. If not
* set, the default is inherited from `$public` (default true).
* @type bool $show_in_rest Whether to include the taxonomy in the REST API.
* @type string $rest_base To change the base url of REST API route. Default is $taxonomy.
* @type string $rest_controller_class REST API Controller class name. Default is 'WP_REST_Terms_Controller'.
* @type bool $show_tagcloud Whether to list the taxonomy in the Tag Cloud Widget controls. If not set,
* the default is inherited from `$show_ui` (default true).
* @type bool $show_in_quick_edit Whether to show the taxonomy in the quick/bulk edit panel. It not set,
* the default is inherited from `$show_ui` (default true).
* @type bool $show_admin_column Whether to display a column for the taxonomy on its post type listing
* screens. Default false.
* @type bool|callable $meta_box_cb Provide a callback function for the meta box display. If not set,
* post_categories_meta_box() is used for hierarchical taxonomies, and
* post_tags_meta_box() is used for non-hierarchical. If false, no meta
* box is shown.
* @type callable $meta_box_sanitize_cb Callback function for sanitizing taxonomy data saved from a meta
* box. If no callback is defined, an appropriate one is determined
* based on the value of `$meta_box_cb`.
* @type array $capabilities {
* Array of capabilities for this taxonomy.
*
* @type string $manage_terms Default 'manage_categories'.
* @type string $edit_terms Default 'manage_categories'.
* @type string $delete_terms Default 'manage_categories'.
* @type string $assign_terms Default 'edit_posts'.
* }
* @type bool|array $rewrite {
* Triggers the handling of rewrites for this taxonomy. Default true, using $taxonomy as slug. To prevent
* rewrite, set to false. To specify rewrite rules, an array can be passed with any of these keys:
*
* @type string $slug Customize the permastruct slug. Default `$taxonomy` key.
* @type bool $with_front Should the permastruct be prepended with WP_Rewrite::$front. Default true.
* @type bool $hierarchical Either hierarchical rewrite tag or not. Default false.
* @type int $ep_mask Assign an endpoint mask. Default `EP_NONE`.
* }
* @type string $query_var Sets the query var key for this taxonomy. Default `$taxonomy` key. If
* false, a taxonomy cannot be loaded at `?{query_var}={term_slug}`. If a
* string, the query `?{query_var}={term_slug}` will be valid.
* @type callable $update_count_callback Works much like a hook, in that it will be called when the count is
* updated. Default _update_post_term_count() for taxonomies attached
* to post types, which confirms that the objects are published before
* counting them. Default _update_generic_term_count() for taxonomies
* attached to other object types, such as users.
* @type bool $_builtin This taxonomy is a "built-in" taxonomy. INTERNAL USE ONLY!
* Default false.
* }
* @return WP_Error|void WP_Error, if errors.
*/
function register_taxonomy( $taxonomy, $object_type, $args = array() ) {
global $wp_taxonomies;
if ( ! is_array( $wp_taxonomies ) ) {
$wp_taxonomies = array();
}
$args = wp_parse_args( $args );
if ( empty( $taxonomy ) || strlen( $taxonomy ) > 32 ) {
_doing_it_wrong( __FUNCTION__, __( 'Taxonomy names must be between 1 and 32 characters in length.' ), '4.2.0' );
return new WP_Error( 'taxonomy_length_invalid', __( 'Taxonomy names must be between 1 and 32 characters in length.' ) );
}
$taxonomy_object = new WP_Taxonomy( $taxonomy, $object_type, $args );
$taxonomy_object->add_rewrite_rules();
$wp_taxonomies[ $taxonomy ] = $taxonomy_object;
$taxonomy_object->add_hooks();
/**
* Fires after a taxonomy is registered.
*
* @since 3.3.0
*
* @param string $taxonomy Taxonomy slug.
* @param array|string $object_type Object type or array of object types.
* @param array $args Array of taxonomy registration arguments.
*/
do_action( 'registered_taxonomy', $taxonomy, $object_type, (array) $taxonomy_object );
}
/**
* Unregisters a taxonomy.
*
* Can not be used to unregister built-in taxonomies.
*
* @since 4.5.0
*
* @global WP $wp Current WordPress environment instance.
* @global array $wp_taxonomies List of taxonomies.
*
* @param string $taxonomy Taxonomy name.
* @return bool|WP_Error True on success, WP_Error on failure or if the taxonomy doesn't exist.
*/
function unregister_taxonomy( $taxonomy ) {
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
$taxonomy_object = get_taxonomy( $taxonomy );
// Do not allow unregistering internal taxonomies.
if ( $taxonomy_object->_builtin ) {
return new WP_Error( 'invalid_taxonomy', __( 'Unregistering a built-in taxonomy is not allowed.' ) );
}
global $wp_taxonomies;
$taxonomy_object->remove_rewrite_rules();
$taxonomy_object->remove_hooks();
// Remove the taxonomy.
unset( $wp_taxonomies[ $taxonomy ] );
/**
* Fires after a taxonomy is unregistered.
*
* @since 4.5.0
*
* @param string $taxonomy Taxonomy name.
*/
do_action( 'unregistered_taxonomy', $taxonomy );
return true;
}
/**
* Builds an object with all taxonomy labels out of a taxonomy object.
*
* @since 3.0.0
* @since 4.3.0 Added the `no_terms` label.
* @since 4.4.0 Added the `items_list_navigation` and `items_list` labels.
* @since 4.9.0 Added the `most_used` and `back_to_items` labels.
*
* @param WP_Taxonomy $tax Taxonomy object.
* @return object {
* Taxonomy labels object. The first default value is for non-hierarchical taxonomies
* (like tags) and the second one is for hierarchical taxonomies (like categories).
*
* @type string $name General name for the taxonomy, usually plural. The same
* as and overridden by `$tax->label`. Default 'Tags'/'Categories'.
* @type string $singular_name Name for one object of this taxonomy. Default 'Tag'/'Category'.
* @type string $search_items Default 'Search Tags'/'Search Categories'.
* @type string $popular_items This label is only used for non-hierarchical taxonomies.
* Default 'Popular Tags'.
* @type string $all_items Default 'All Tags'/'All Categories'.
* @type string $parent_item This label is only used for hierarchical taxonomies. Default
* 'Parent Category'.
* @type string $parent_item_colon The same as `parent_item`, but with colon `:` in the end.
* @type string $edit_item Default 'Edit Tag'/'Edit Category'.
* @type string $view_item Default 'View Tag'/'View Category'.
* @type string $update_item Default 'Update Tag'/'Update Category'.
* @type string $add_new_item Default 'Add New Tag'/'Add New Category'.
* @type string $new_item_name Default 'New Tag Name'/'New Category Name'.
* @type string $separate_items_with_commas This label is only used for non-hierarchical taxonomies. Default
* 'Separate tags with commas', used in the meta box.
* @type string $add_or_remove_items This label is only used for non-hierarchical taxonomies. Default
* 'Add or remove tags', used in the meta box when JavaScript
* is disabled.
* @type string $choose_from_most_used This label is only used on non-hierarchical taxonomies. Default
* 'Choose from the most used tags', used in the meta box.
* @type string $not_found Default 'No tags found'/'No categories found', used in
* the meta box and taxonomy list table.
* @type string $no_terms Default 'No tags'/'No categories', used in the posts and media
* list tables.
* @type string $items_list_navigation Label for the table pagination hidden heading.
* @type string $items_list Label for the table hidden heading.
* @type string $most_used Title for the Most Used tab. Default 'Most Used'.
* @type string $back_to_items Label displayed after a term has been updated.
* }
*/
function get_taxonomy_labels( $tax ) {
$tax->labels = (array) $tax->labels;
if ( isset( $tax->helps ) && empty( $tax->labels['separate_items_with_commas'] ) ) {
$tax->labels['separate_items_with_commas'] = $tax->helps;
}
if ( isset( $tax->no_tagcloud ) && empty( $tax->labels['not_found'] ) ) {
$tax->labels['not_found'] = $tax->no_tagcloud;
}
$nohier_vs_hier_defaults = array(
'name' => array( _x( 'Tags', 'taxonomy general name' ), _x( 'Categories', 'taxonomy general name' ) ),
'singular_name' => array( _x( 'Tag', 'taxonomy singular name' ), _x( 'Category', 'taxonomy singular name' ) ),
'search_items' => array( __( 'Search Tags' ), __( 'Search Categories' ) ),
'popular_items' => array( __( 'Popular Tags' ), null ),
'all_items' => array( __( 'All Tags' ), __( 'All Categories' ) ),
'parent_item' => array( null, __( 'Parent Category' ) ),
'parent_item_colon' => array( null, __( 'Parent Category:' ) ),
'edit_item' => array( __( 'Edit Tag' ), __( 'Edit Category' ) ),
'view_item' => array( __( 'View Tag' ), __( 'View Category' ) ),
'update_item' => array( __( 'Update Tag' ), __( 'Update Category' ) ),
'add_new_item' => array( __( 'Add New Tag' ), __( 'Add New Category' ) ),
'new_item_name' => array( __( 'New Tag Name' ), __( 'New Category Name' ) ),
'separate_items_with_commas' => array( __( 'Separate tags with commas' ), null ),
'add_or_remove_items' => array( __( 'Add or remove tags' ), null ),
'choose_from_most_used' => array( __( 'Choose from the most used tags' ), null ),
'not_found' => array( __( 'No tags found.' ), __( 'No categories found.' ) ),
'no_terms' => array( __( 'No tags' ), __( 'No categories' ) ),
'items_list_navigation' => array( __( 'Tags list navigation' ), __( 'Categories list navigation' ) ),
'items_list' => array( __( 'Tags list' ), __( 'Categories list' ) ),
/* translators: Tab heading when selecting from the most used terms */
'most_used' => array( _x( 'Most Used', 'tags' ), _x( 'Most Used', 'categories' ) ),
'back_to_items' => array( __( '&larr; Back to Tags' ), __( '&larr; Back to Categories' ) ),
);
$nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];
$labels = _get_custom_object_labels( $tax, $nohier_vs_hier_defaults );
$taxonomy = $tax->name;
$default_labels = clone $labels;
/**
* Filters the labels of a specific taxonomy.
*
* The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug.
*
* @since 4.4.0
*
* @see get_taxonomy_labels() for the full list of taxonomy labels.
*
* @param object $labels Object with labels for the taxonomy as member variables.
*/
$labels = apply_filters( "taxonomy_labels_{$taxonomy}", $labels );
// Ensure that the filtered labels contain all required default values.
$labels = (object) array_merge( (array) $default_labels, (array) $labels );
return $labels;
}
/**
* Add an already registered taxonomy to an object type.
*
* @since 3.0.0
*
* @global array $wp_taxonomies The registered taxonomies.
*
* @param string $taxonomy Name of taxonomy object.
* @param string $object_type Name of the object type.
* @return bool True if successful, false if not.
*/
function register_taxonomy_for_object_type( $taxonomy, $object_type ) {
global $wp_taxonomies;
if ( ! isset( $wp_taxonomies[ $taxonomy ] ) ) {
return false;
}
if ( ! get_post_type_object( $object_type ) ) {
return false;
}
if ( ! in_array( $object_type, $wp_taxonomies[ $taxonomy ]->object_type ) ) {
$wp_taxonomies[ $taxonomy ]->object_type[] = $object_type;
}
// Filter out empties.
$wp_taxonomies[ $taxonomy ]->object_type = array_filter( $wp_taxonomies[ $taxonomy ]->object_type );
/**
* Fires after a taxonomy is registered for an object type.
*
* @since 4.9.9
*
* @param string $taxonomy Taxonomy name.
* @param string $object_type Name of the object type.
*/
do_action( 'registered_taxonomy_for_object_type', $taxonomy, $object_type );
return true;
}
/**
* Remove an already registered taxonomy from an object type.
*
* @since 3.7.0
*
* @global array $wp_taxonomies The registered taxonomies.
*
* @param string $taxonomy Name of taxonomy object.
* @param string $object_type Name of the object type.
* @return bool True if successful, false if not.
*/
function unregister_taxonomy_for_object_type( $taxonomy, $object_type ) {
global $wp_taxonomies;
if ( ! isset( $wp_taxonomies[ $taxonomy ] ) ) {
return false;
}
if ( ! get_post_type_object( $object_type ) ) {
return false;
}
$key = array_search( $object_type, $wp_taxonomies[ $taxonomy ]->object_type, true );
if ( false === $key ) {
return false;
}
unset( $wp_taxonomies[ $taxonomy ]->object_type[ $key ] );
/**
* Fires after a taxonomy is unregistered for an object type.
*
* @since 4.9.9
*
* @param string $taxonomy Taxonomy name.
* @param string $object_type Name of the object type.
*/
do_action( 'unregistered_taxonomy_for_object_type', $taxonomy, $object_type );
return true;
}
//
// Term API
//
/**
* Retrieve object_ids of valid taxonomy and term.
*
* The strings of $taxonomies must exist before this function will continue. On
* failure of finding a valid taxonomy, it will return an WP_Error class, kind
* of like Exceptions in PHP 5, except you can't catch them. Even so, you can
* still test for the WP_Error class and get the error message.
*
* The $terms aren't checked the same as $taxonomies, but still need to exist
* for $object_ids to be returned.
*
* It is possible to change the order that object_ids is returned by either
* using PHP sort family functions or using the database by using $args with
* either ASC or DESC array. The value should be in the key named 'order'.
*
* @since 2.3.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int|array $term_ids Term id or array of term ids of terms that will be used.
* @param string|array $taxonomies String of taxonomy name or Array of string values of taxonomy names.
* @param array|string $args Change the order of the object_ids, either ASC or DESC.
* @return WP_Error|array If the taxonomy does not exist, then WP_Error will be returned. On success.
* the array can be empty meaning that there are no $object_ids found or it will return the $object_ids found.
*/
function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) {
global $wpdb;
if ( ! is_array( $term_ids ) ) {
$term_ids = array( $term_ids );
}
if ( ! is_array( $taxonomies ) ) {
$taxonomies = array( $taxonomies );
}
foreach ( (array) $taxonomies as $taxonomy ) {
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
}
$defaults = array( 'order' => 'ASC' );
$args = wp_parse_args( $args, $defaults );
$order = ( 'desc' == strtolower( $args['order'] ) ) ? 'DESC' : 'ASC';
$term_ids = array_map( 'intval', $term_ids );
$taxonomies = "'" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "'";
$term_ids = "'" . implode( "', '", $term_ids ) . "'";
$sql = "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";
$last_changed = wp_cache_get_last_changed( 'terms' );
$cache_key = 'get_objects_in_term:' . md5( $sql ) . ":$last_changed";
$cache = wp_cache_get( $cache_key, 'terms' );
if ( false === $cache ) {
$object_ids = $wpdb->get_col( $sql );
wp_cache_set( $cache_key, $object_ids, 'terms' );
} else {
$object_ids = (array) $cache;
}
if ( ! $object_ids ) {
return array();
}
return $object_ids;
}
/**
* Given a taxonomy query, generates SQL to be appended to a main query.
*
* @since 3.1.0
*
* @see WP_Tax_Query
*
* @param array $tax_query A compact tax query
* @param string $primary_table
* @param string $primary_id_column
* @return array
*/
function get_tax_sql( $tax_query, $primary_table, $primary_id_column ) {
$tax_query_obj = new WP_Tax_Query( $tax_query );
return $tax_query_obj->get_sql( $primary_table, $primary_id_column );
}
/**
* Get all Term data from database by Term ID.
*
* The usage of the get_term function is to apply filters to a term object. It
* is possible to get a term object from the database before applying the
* filters.
*
* $term ID must be part of $taxonomy, to get from the database. Failure, might
* be able to be captured by the hooks. Failure would be the same value as $wpdb
* returns for the get_row method.
*
* There are two hooks, one is specifically for each term, named 'get_term', and
* the second is for the taxonomy name, 'term_$taxonomy'. Both hooks gets the
* term object, and the taxonomy name as parameters. Both hooks are expected to
* return a Term object.
*
* {@see 'get_term'} hook - Takes two parameters the term Object and the taxonomy name.
* Must return term object. Used in get_term() as a catch-all filter for every
* $term.
*
* {@see 'get_$taxonomy'} hook - Takes two parameters the term Object and the taxonomy
* name. Must return term object. $taxonomy will be the taxonomy name, so for
* example, if 'category', it would be 'get_category' as the filter name. Useful
* for custom taxonomies or plugging into default taxonomies.
*
* @todo Better formatting for DocBlock
*
* @since 2.3.0
* @since 4.4.0 Converted to return a WP_Term object if `$output` is `OBJECT`.
* The `$taxonomy` parameter was made optional.
*
* @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
*
* @param int|WP_Term|object $term If integer, term data will be fetched from the database, or from the cache if
* available. If stdClass object (as in the results of a database query), will apply
* filters and return a `WP_Term` object corresponding to the `$term` data. If `WP_Term`,
* will return `$term`.
* @param string $taxonomy Optional. Taxonomy name that $term is part of.
* @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which correspond to
* a WP_Term object, an associative array, or a numeric array, respectively. Default OBJECT.
* @param string $filter Optional, default is raw or no WordPress defined filter will applied.
* @return array|WP_Term|WP_Error|null Object of the type specified by `$output` on success. When `$output` is 'OBJECT',
* a WP_Term instance is returned. If taxonomy does not exist, a WP_Error is
* returned. Returns null for miscellaneous failure.
*/
function get_term( $term, $taxonomy = '', $output = OBJECT, $filter = 'raw' ) {
if ( empty( $term ) ) {
return new WP_Error( 'invalid_term', __( 'Empty Term.' ) );
}
if ( $taxonomy && ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
if ( $term instanceof WP_Term ) {
$_term = $term;
} elseif ( is_object( $term ) ) {
if ( empty( $term->filter ) || 'raw' === $term->filter ) {
$_term = sanitize_term( $term, $taxonomy, 'raw' );
$_term = new WP_Term( $_term );
} else {
$_term = WP_Term::get_instance( $term->term_id );
}
} else {
$_term = WP_Term::get_instance( $term, $taxonomy );
}
if ( is_wp_error( $_term ) ) {
return $_term;
} elseif ( ! $_term ) {
return null;
}
/**
* Filters a taxonomy term object.
*
* @since 2.3.0
* @since 4.4.0 `$_term` is now a `WP_Term` object.
*
* @param WP_Term $_term Term object.
* @param string $taxonomy The taxonomy slug.
*/
$_term = apply_filters( 'get_term', $_term, $taxonomy );
/**
* Filters a taxonomy term object.
*
* The dynamic portion of the filter name, `$taxonomy`, refers
* to the slug of the term's taxonomy.
*
* @since 2.3.0
* @since 4.4.0 `$_term` is now a `WP_Term` object.
*
* @param WP_Term $_term Term object.
* @param string $taxonomy The taxonomy slug.
*/
$_term = apply_filters( "get_{$taxonomy}", $_term, $taxonomy );
// Bail if a filter callback has changed the type of the `$_term` object.
if ( ! ( $_term instanceof WP_Term ) ) {
return $_term;
}
// Sanitize term, according to the specified filter.
$_term->filter( $filter );
if ( $output == ARRAY_A ) {
return $_term->to_array();
} elseif ( $output == ARRAY_N ) {
return array_values( $_term->to_array() );
}
return $_term;
}
/**
* Get all Term data from database by Term field and data.
*
* Warning: $value is not escaped for 'name' $field. You must do it yourself, if
* required.
*
* The default $field is 'id', therefore it is possible to also use null for
* field, but not recommended that you do so.
*
* If $value does not exist, the return value will be false. If $taxonomy exists
* and $field and $value combinations exist, the Term will be returned.
*
* This function will always return the first term that matches the `$field`-
* `$value`-`$taxonomy` combination specified in the parameters. If your query
* is likely to match more than one term (as is likely to be the case when
* `$field` is 'name', for example), consider using get_terms() instead; that
* way, you will get all matching terms, and can provide your own logic for
* deciding which one was intended.
*
* @todo Better formatting for DocBlock.
*
* @since 2.3.0
* @since 4.4.0 `$taxonomy` is optional if `$field` is 'term_taxonomy_id'. Converted to return
* a WP_Term object if `$output` is `OBJECT`.
*
* @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
*
* @param string $field Either 'slug', 'name', 'id' (term_id), or 'term_taxonomy_id'
* @param string|int $value Search for this term value
* @param string $taxonomy Taxonomy name. Optional, if `$field` is 'term_taxonomy_id'.
* @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which correspond to
* a WP_Term object, an associative array, or a numeric array, respectively. Default OBJECT.
* @param string $filter Optional, default is raw or no WordPress defined filter will applied.
* @return WP_Term|array|false WP_Term instance (or array) on success. Will return false if `$taxonomy` does not exist
* or `$term` was not found.
*/
function get_term_by( $field, $value, $taxonomy = '', $output = OBJECT, $filter = 'raw' ) {
// 'term_taxonomy_id' lookups don't require taxonomy checks.
if ( 'term_taxonomy_id' !== $field && ! taxonomy_exists( $taxonomy ) ) {
return false;
}
// No need to perform a query for empty 'slug' or 'name'.
if ( 'slug' === $field || 'name' === $field ) {
$value = (string) $value;
if ( 0 === strlen( $value ) ) {
return false;
}
}
if ( 'id' === $field || 'term_id' === $field ) {
$term = get_term( (int) $value, $taxonomy, $output, $filter );
if ( is_wp_error( $term ) || null === $term ) {
$term = false;
}
return $term;
}
$args = array(
'get' => 'all',
'number' => 1,
'taxonomy' => $taxonomy,
'update_term_meta_cache' => false,
'orderby' => 'none',
'suppress_filter' => true,
);
switch ( $field ) {
case 'slug':
$args['slug'] = $value;
break;
case 'name':
$args['name'] = $value;
break;
case 'term_taxonomy_id':
$args['term_taxonomy_id'] = $value;
unset( $args['taxonomy'] );
break;
default:
return false;
}
$terms = get_terms( $args );
if ( is_wp_error( $terms ) || empty( $terms ) ) {
return false;
}
$term = array_shift( $terms );
// In the case of 'term_taxonomy_id', override the provided `$taxonomy` with whatever we find in the db.
if ( 'term_taxonomy_id' === $field ) {
$taxonomy = $term->taxonomy;
}
return get_term( $term, $taxonomy, $output, $filter );
}
/**
* Merge all term children into a single array of their IDs.
*
* This recursive function will merge all of the children of $term into the same
* array of term IDs. Only useful for taxonomies which are hierarchical.
*
* Will return an empty array if $term does not exist in $taxonomy.
*
* @since 2.3.0
*
* @param int $term_id ID of Term to get children.
* @param string $taxonomy Taxonomy Name.
* @return array|WP_Error List of Term IDs. WP_Error returned if `$taxonomy` does not exist.
*/
function get_term_children( $term_id, $taxonomy ) {
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
$term_id = intval( $term_id );
$terms = _get_term_hierarchy( $taxonomy );
if ( ! isset( $terms[ $term_id ] ) ) {
return array();
}
$children = $terms[ $term_id ];
foreach ( (array) $terms[ $term_id ] as $child ) {
if ( $term_id == $child ) {
continue;
}
if ( isset( $terms[ $child ] ) ) {
$children = array_merge( $children, get_term_children( $child, $taxonomy ) );
}
}
return $children;
}
/**
* Get sanitized Term field.
*
* The function is for contextual reasons and for simplicity of usage.
*
* @since 2.3.0
* @since 4.4.0 The `$taxonomy` parameter was made optional. `$term` can also now accept a WP_Term object.
*
* @see sanitize_term_field()
*
* @param string $field Term field to fetch.
* @param int|WP_Term $term Term ID or object.
* @param string $taxonomy Optional. Taxonomy Name. Default empty.
* @param string $context Optional, default is display. Look at sanitize_term_field() for available options.
* @return string|int|null|WP_Error Will return an empty string if $term is not an object or if $field is not set in $term.
*/
function get_term_field( $field, $term, $taxonomy = '', $context = 'display' ) {
$term = get_term( $term, $taxonomy );
if ( is_wp_error( $term ) ) {
return $term;
}
if ( ! is_object( $term ) ) {
return '';
}
if ( ! isset( $term->$field ) ) {
return '';
}
return sanitize_term_field( $field, $term->$field, $term->term_id, $term->taxonomy, $context );
}
/**
* Sanitizes Term for editing.
*
* Return value is sanitize_term() and usage is for sanitizing the term for
* editing. Function is for contextual and simplicity.
*
* @since 2.3.0
*
* @param int|object $id Term ID or object.
* @param string $taxonomy Taxonomy name.
* @return string|int|null|WP_Error Will return empty string if $term is not an object.
*/
function get_term_to_edit( $id, $taxonomy ) {
$term = get_term( $id, $taxonomy );
if ( is_wp_error( $term ) ) {
return $term;
}
if ( ! is_object( $term ) ) {
return '';
}
return sanitize_term( $term, $taxonomy, 'edit' );
}
/**
* Retrieve the terms in a given taxonomy or list of taxonomies.
*
* You can fully inject any customizations to the query before it is sent, as
* well as control the output with a filter.
*
* The {@see 'get_terms'} filter will be called when the cache has the term and will
* pass the found term along with the array of $taxonomies and array of $args.
* This filter is also called before the array of terms is passed and will pass
* the array of terms, along with the $taxonomies and $args.
*
* The {@see 'list_terms_exclusions'} filter passes the compiled exclusions along with
* the $args.
*
* The {@see 'get_terms_orderby'} filter passes the `ORDER BY` clause for the query
* along with the $args array.
*
* Prior to 4.5.0, the first parameter of `get_terms()` was a taxonomy or list of taxonomies:
*
* $terms = get_terms( 'post_tag', array(
* 'hide_empty' => false,
* ) );
*
* Since 4.5.0, taxonomies should be passed via the 'taxonomy' argument in the `$args` array:
*
* $terms = get_terms( array(
* 'taxonomy' => 'post_tag',
* 'hide_empty' => false,
* ) );
*
* @since 2.3.0
* @since 4.2.0 Introduced 'name' and 'childless' parameters.
* @since 4.4.0 Introduced the ability to pass 'term_id' as an alias of 'id' for the `orderby` parameter.
* Introduced the 'meta_query' and 'update_term_meta_cache' parameters. Converted to return
* a list of WP_Term objects.
* @since 4.5.0 Changed the function signature so that the `$args` array can be provided as the first parameter.
* Introduced 'meta_key' and 'meta_value' parameters. Introduced the ability to order results by metadata.
* @since 4.8.0 Introduced 'suppress_filter' parameter.
*
* @internal The `$deprecated` parameter is parsed for backward compatibility only.
*
* @param string|array $args Optional. Array or string of arguments. See WP_Term_Query::__construct()
* for information on accepted arguments. Default empty.
* @param array $deprecated Argument array, when using the legacy function parameter format. If present, this
* parameter will be interpreted as `$args`, and the first function parameter will
* be parsed as a taxonomy or array of taxonomies.
* @return array|int|WP_Error List of WP_Term instances and their children. Will return WP_Error, if any of $taxonomies
* do not exist.
*/
function get_terms( $args = array(), $deprecated = '' ) {
$term_query = new WP_Term_Query();
$defaults = array(
'suppress_filter' => false,
);
/*
* Legacy argument format ($taxonomy, $args) takes precedence.
*
* We detect legacy argument format by checking if
* (a) a second non-empty parameter is passed, or
* (b) the first parameter shares no keys with the default array (ie, it's a list of taxonomies)
*/
$_args = wp_parse_args( $args );
$key_intersect = array_intersect_key( $term_query->query_var_defaults, (array) $_args );
$do_legacy_args = $deprecated || empty( $key_intersect );
if ( $do_legacy_args ) {
$taxonomies = (array) $args;
$args = wp_parse_args( $deprecated, $defaults );
$args['taxonomy'] = $taxonomies;
} else {
$args = wp_parse_args( $args, $defaults );
if ( isset( $args['taxonomy'] ) && null !== $args['taxonomy'] ) {
$args['taxonomy'] = (array) $args['taxonomy'];
}
}
if ( ! empty( $args['taxonomy'] ) ) {
foreach ( $args['taxonomy'] as $taxonomy ) {
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
}
}
// Don't pass suppress_filter to WP_Term_Query.
$suppress_filter = $args['suppress_filter'];
unset( $args['suppress_filter'] );
$terms = $term_query->query( $args );
// Count queries are not filtered, for legacy reasons.
if ( ! is_array( $terms ) ) {
return $terms;
}
if ( $suppress_filter ) {
return $terms;
}
/**
* Filters the found terms.
*
* @since 2.3.0
* @since 4.6.0 Added the `$term_query` parameter.
*
* @param array $terms Array of found terms.
* @param array $taxonomies An array of taxonomies.
* @param array $args An array of get_terms() arguments.
* @param WP_Term_Query $term_query The WP_Term_Query object.
*/
return apply_filters( 'get_terms', $terms, $term_query->query_vars['taxonomy'], $term_query->query_vars, $term_query );
}
/**
* Adds metadata to a term.
*
* @since 4.4.0
*
* @param int $term_id Term ID.
* @param string $meta_key Metadata name.
* @param mixed $meta_value Metadata value.
* @param bool $unique Optional. Whether to bail if an entry with the same key is found for the term.
* Default false.
* @return int|WP_Error|bool Meta ID on success. WP_Error when term_id is ambiguous between taxonomies.
* False on failure.
*/
function add_term_meta( $term_id, $meta_key, $meta_value, $unique = false ) {
// Bail if term meta table is not installed.
if ( get_option( 'db_version' ) < 34370 ) {
return false;
}
if ( wp_term_is_shared( $term_id ) ) {
return new WP_Error( 'ambiguous_term_id', __( 'Term meta cannot be added to terms that are shared between taxonomies.' ), $term_id );
}
$added = add_metadata( 'term', $term_id, $meta_key, $meta_value, $unique );
// Bust term query cache.
if ( $added ) {
wp_cache_set( 'last_changed', microtime(), 'terms' );
}
return $added;
}
/**
* Removes metadata matching criteria from a term.
*
* @since 4.4.0
*
* @param int $term_id Term ID.
* @param string $meta_key Metadata name.
* @param mixed $meta_value Optional. Metadata value. If provided, rows will only be removed that match the value.
* @return bool True on success, false on failure.
*/
function delete_term_meta( $term_id, $meta_key, $meta_value = '' ) {
// Bail if term meta table is not installed.
if ( get_option( 'db_version' ) < 34370 ) {
return false;
}
$deleted = delete_metadata( 'term', $term_id, $meta_key, $meta_value );
// Bust term query cache.
if ( $deleted ) {
wp_cache_set( 'last_changed', microtime(), 'terms' );
}
return $deleted;
}
/**
* Retrieves metadata for a term.
*
* @since 4.4.0
*
* @param int $term_id Term ID.
* @param string $key Optional. The meta key to retrieve. If no key is provided, fetches all metadata for the term.
* @param bool $single Whether to return a single value. If false, an array of all values matching the
* `$term_id`/`$key` pair will be returned. Default: false.
* @return mixed If `$single` is false, an array of metadata values. If `$single` is true, a single metadata value.
*/
function get_term_meta( $term_id, $key = '', $single = false ) {
// Bail if term meta table is not installed.
if ( get_option( 'db_version' ) < 34370 ) {
return false;
}
return get_metadata( 'term', $term_id, $key, $single );
}
/**
* Updates term metadata.
*
* Use the `$prev_value` parameter to differentiate between meta fields with the same key and term ID.
*
* If the meta field for the term does not exist, it will be added.
*
* @since 4.4.0
*
* @param int $term_id Term ID.
* @param string $meta_key Metadata key.
* @param mixed $meta_value Metadata value.
* @param mixed $prev_value Optional. Previous value to check before removing.
* @return int|WP_Error|bool Meta ID if the key didn't previously exist. True on successful update.
* WP_Error when term_id is ambiguous between taxonomies. False on failure.
*/
function update_term_meta( $term_id, $meta_key, $meta_value, $prev_value = '' ) {
// Bail if term meta table is not installed.
if ( get_option( 'db_version' ) < 34370 ) {
return false;
}
if ( wp_term_is_shared( $term_id ) ) {
return new WP_Error( 'ambiguous_term_id', __( 'Term meta cannot be added to terms that are shared between taxonomies.' ), $term_id );
}
$updated = update_metadata( 'term', $term_id, $meta_key, $meta_value, $prev_value );
// Bust term query cache.
if ( $updated ) {
wp_cache_set( 'last_changed', microtime(), 'terms' );
}
return $updated;
}
/**
* Updates metadata cache for list of term IDs.
*
* Performs SQL query to retrieve all metadata for the terms matching `$term_ids` and stores them in the cache.
* Subsequent calls to `get_term_meta()` will not need to query the database.
*
* @since 4.4.0
*
* @param array $term_ids List of term IDs.
* @return array|false Returns false if there is nothing to update. Returns an array of metadata on success.
*/
function update_termmeta_cache( $term_ids ) {
// Bail if term meta table is not installed.
if ( get_option( 'db_version' ) < 34370 ) {
return;
}
return update_meta_cache( 'term', $term_ids );
}
/**
* Get all meta data, including meta IDs, for the given term ID.
*
* @since 4.9.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int $term_id Term ID.
* @return array|false Array with meta data, or false when the meta table is not installed.
*/
function has_term_meta( $term_id ) {
// Bail if term meta table is not installed.
if ( get_option( 'db_version' ) < 34370 ) {
return false;
}
global $wpdb;
return $wpdb->get_results( $wpdb->prepare( "SELECT meta_key, meta_value, meta_id, term_id FROM $wpdb->termmeta WHERE term_id = %d ORDER BY meta_key,meta_id", $term_id ), ARRAY_A );
}
/**
* Registers a meta key for terms.
*
* @since 4.9.8
*
* @param string $taxonomy Taxonomy to register a meta key for. Pass an empty string
* to register the meta key across all existing taxonomies.
* @param string $meta_key The meta key to register.
* @param array $args Data used to describe the meta key when registered. See
* {@see register_meta()} for a list of supported arguments.
* @return bool True if the meta key was successfully registered, false if not.
*/
function register_term_meta( $taxonomy, $meta_key, array $args ) {
$args['object_subtype'] = $taxonomy;
return register_meta( 'term', $meta_key, $args );
}
/**
* Unregisters a meta key for terms.
*
* @since 4.9.8
*
* @param string $taxonomy Taxonomy the meta key is currently registered for. Pass
* an empty string if the meta key is registered across all
* existing taxonomies.
* @param string $meta_key The meta key to unregister.
* @return bool True on success, false if the meta key was not previously registered.
*/
function unregister_term_meta( $taxonomy, $meta_key ) {
return unregister_meta_key( 'term', $meta_key, $taxonomy );
}
/**
* Determines whether a term exists.
*
* Formerly is_term(), introduced in 2.3.0.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @since 3.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int|string $term The term to check. Accepts term ID, slug, or name.
* @param string $taxonomy The taxonomy name to use
* @param int $parent Optional. ID of parent term under which to confine the exists search.
* @return mixed Returns null if the term does not exist. Returns the term ID
* if no taxonomy is specified and the term ID exists. Returns
* an array of the term ID and the term taxonomy ID if the taxonomy
* is specified and the pairing exists.
*/
function term_exists( $term, $taxonomy = '', $parent = null ) {
global $wpdb;
$select = "SELECT term_id FROM $wpdb->terms as t WHERE ";
$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 ";
if ( is_int( $term ) ) {
if ( 0 == $term ) {
return 0;
}
$where = 't.term_id = %d';
if ( ! empty( $taxonomy ) ) {
return $wpdb->get_row( $wpdb->prepare( $tax_select . $where . ' AND tt.taxonomy = %s', $term, $taxonomy ), ARRAY_A );
} else {
return $wpdb->get_var( $wpdb->prepare( $select . $where, $term ) );
}
}
$term = trim( wp_unslash( $term ) );
$slug = sanitize_title( $term );
$where = 't.slug = %s';
$else_where = 't.name = %s';
$where_fields = array( $slug );
$else_where_fields = array( $term );
$orderby = 'ORDER BY t.term_id ASC';
$limit = 'LIMIT 1';
if ( ! empty( $taxonomy ) ) {
if ( is_numeric( $parent ) ) {
$parent = (int) $parent;
$where_fields[] = $parent;
$else_where_fields[] = $parent;
$where .= ' AND tt.parent = %d';
$else_where .= ' AND tt.parent = %d';
}
$where_fields[] = $taxonomy;
$else_where_fields[] = $taxonomy;
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 $orderby $limit", $where_fields ), ARRAY_A ) ) {
return $result;
}
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 $orderby $limit", $else_where_fields ), ARRAY_A );
}
if ( $result = $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->terms as t WHERE $where $orderby $limit", $where_fields ) ) ) {
return $result;
}
return $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->terms as t WHERE $else_where $orderby $limit", $else_where_fields ) );
}
/**
* Check if a term is an ancestor of another term.
*
* You can use either an id or the term object for both parameters.
*
* @since 3.4.0
*
* @param int|object $term1 ID or object to check if this is the parent term.
* @param int|object $term2 The child term.
* @param string $taxonomy Taxonomy name that $term1 and `$term2` belong to.
* @return bool Whether `$term2` is a child of `$term1`.
*/
function term_is_ancestor_of( $term1, $term2, $taxonomy ) {
if ( ! isset( $term1->term_id ) ) {
$term1 = get_term( $term1, $taxonomy );
}
if ( ! isset( $term2->parent ) ) {
$term2 = get_term( $term2, $taxonomy );
}
if ( empty( $term1->term_id ) || empty( $term2->parent ) ) {
return false;
}
if ( $term2->parent == $term1->term_id ) {
return true;
}
return term_is_ancestor_of( $term1, get_term( $term2->parent, $taxonomy ), $taxonomy );
}
/**
* Sanitize Term all fields.
*
* Relies on sanitize_term_field() to sanitize the term. The difference is that
* this function will sanitize <strong>all</strong> fields. The context is based
* on sanitize_term_field().
*
* The $term is expected to be either an array or an object.
*
* @since 2.3.0
*
* @param array|object $term The term to check.
* @param string $taxonomy The taxonomy name to use.
* @param string $context Optional. Context in which to sanitize the term. Accepts 'edit', 'db',
* 'display', 'attribute', or 'js'. Default 'display'.
* @return array|object Term with all fields sanitized.
*/
function sanitize_term( $term, $taxonomy, $context = 'display' ) {
$fields = array( 'term_id', 'name', 'description', 'slug', 'count', 'parent', 'term_group', 'term_taxonomy_id', 'object_id' );
$do_object = is_object( $term );
$term_id = $do_object ? $term->term_id : ( isset( $term['term_id'] ) ? $term['term_id'] : 0 );
foreach ( (array) $fields as $field ) {
if ( $do_object ) {
if ( isset( $term->$field ) ) {
$term->$field = sanitize_term_field( $field, $term->$field, $term_id, $taxonomy, $context );
}
} else {
if ( isset( $term[ $field ] ) ) {
$term[ $field ] = sanitize_term_field( $field, $term[ $field ], $term_id, $taxonomy, $context );
}
}
}
if ( $do_object ) {
$term->filter = $context;
} else {
$term['filter'] = $context;
}
return $term;
}
/**
* Cleanse the field value in the term based on the context.
*
* Passing a term field value through the function should be assumed to have
* cleansed the value for whatever context the term field is going to be used.
*
* If no context or an unsupported context is given, then default filters will
* be applied.
*
* There are enough filters for each context to support a custom filtering
* without creating your own filter function. Simply create a function that
* hooks into the filter you need.
*
* @since 2.3.0
*
* @param string $field Term field to sanitize.
* @param string $value Search for this term value.
* @param int $term_id Term ID.
* @param string $taxonomy Taxonomy Name.
* @param string $context Context in which to sanitize the term field. Accepts 'edit', 'db', 'display',
* 'attribute', or 'js'.
* @return mixed Sanitized field.
*/
function sanitize_term_field( $field, $value, $term_id, $taxonomy, $context ) {
$int_fields = array( 'parent', 'term_id', 'count', 'term_group', 'term_taxonomy_id', 'object_id' );
if ( in_array( $field, $int_fields ) ) {
$value = (int) $value;
if ( $value < 0 ) {
$value = 0;
}
}
if ( 'raw' == $context ) {
return $value;
}
if ( 'edit' == $context ) {
/**
* Filters a term field to edit before it is sanitized.
*
* The dynamic portion of the filter name, `$field`, refers to the term field.
*
* @since 2.3.0
*
* @param mixed $value Value of the term field.
* @param int $term_id Term ID.
* @param string $taxonomy Taxonomy slug.
*/
$value = apply_filters( "edit_term_{$field}", $value, $term_id, $taxonomy );
/**
* Filters the taxonomy field to edit before it is sanitized.
*
* The dynamic portions of the filter name, `$taxonomy` and `$field`, refer
* to the taxonomy slug and taxonomy field, respectively.
*
* @since 2.3.0
*
* @param mixed $value Value of the taxonomy field to edit.
* @param int $term_id Term ID.
*/
$value = apply_filters( "edit_{$taxonomy}_{$field}", $value, $term_id );
if ( 'description' == $field ) {
$value = esc_html( $value ); // textarea_escaped
} else {
$value = esc_attr( $value );
}
} elseif ( 'db' == $context ) {
/**
* Filters a term field value before it is sanitized.
*
* The dynamic portion of the filter name, `$field`, refers to the term field.
*
* @since 2.3.0
*
* @param mixed $value Value of the term field.
* @param string $taxonomy Taxonomy slug.
*/
$value = apply_filters( "pre_term_{$field}", $value, $taxonomy );
/**
* Filters a taxonomy field before it is sanitized.
*
* The dynamic portions of the filter name, `$taxonomy` and `$field`, refer
* to the taxonomy slug and field name, respectively.
*
* @since 2.3.0
*
* @param mixed $value Value of the taxonomy field.
*/
$value = apply_filters( "pre_{$taxonomy}_{$field}", $value );
// Back compat filters
if ( 'slug' == $field ) {
/**
* Filters the category nicename before it is sanitized.
*
* Use the {@see 'pre_$taxonomy_$field'} hook instead.
*
* @since 2.0.3
*
* @param string $value The category nicename.
*/
$value = apply_filters( 'pre_category_nicename', $value );
}
} elseif ( 'rss' == $context ) {
/**
* Filters the term field for use in RSS.
*
* The dynamic portion of the filter name, `$field`, refers to the term field.
*
* @since 2.3.0
*
* @param mixed $value Value of the term field.
* @param string $taxonomy Taxonomy slug.
*/
$value = apply_filters( "term_{$field}_rss", $value, $taxonomy );
/**
* Filters the taxonomy field for use in RSS.
*
* The dynamic portions of the hook name, `$taxonomy`, and `$field`, refer
* to the taxonomy slug and field name, respectively.
*
* @since 2.3.0
*
* @param mixed $value Value of the taxonomy field.
*/
$value = apply_filters( "{$taxonomy}_{$field}_rss", $value );
} else {
// Use display filters by default.
/**
* Filters the term field sanitized for display.
*
* The dynamic portion of the filter name, `$field`, refers to the term field name.
*
* @since 2.3.0
*
* @param mixed $value Value of the term field.
* @param int $term_id Term ID.
* @param string $taxonomy Taxonomy slug.
* @param string $context Context to retrieve the term field value.
*/
$value = apply_filters( "term_{$field}", $value, $term_id, $taxonomy, $context );
/**
* Filters the taxonomy field sanitized for display.
*
* The dynamic portions of the filter name, `$taxonomy`, and `$field`, refer
* to the taxonomy slug and taxonomy field, respectively.
*
* @since 2.3.0
*
* @param mixed $value Value of the taxonomy field.
* @param int $term_id Term ID.
* @param string $context Context to retrieve the taxonomy field value.
*/
$value = apply_filters( "{$taxonomy}_{$field}", $value, $term_id, $context );
}
if ( 'attribute' == $context ) {
$value = esc_attr( $value );
} elseif ( 'js' == $context ) {
$value = esc_js( $value );
}
return $value;
}
/**
* Count how many terms are in Taxonomy.
*
* Default $args is 'hide_empty' which can be 'hide_empty=true' or array('hide_empty' => true).
*
* @since 2.3.0
*
* @param string $taxonomy Taxonomy name.
* @param array|string $args Optional. Array of arguments that get passed to get_terms().
* Default empty array.
* @return array|int|WP_Error Number of terms in that taxonomy or WP_Error if the taxonomy does not exist.
*/
function wp_count_terms( $taxonomy, $args = array() ) {
$defaults = array( 'hide_empty' => false );
$args = wp_parse_args( $args, $defaults );
// backward compatibility
if ( isset( $args['ignore_empty'] ) ) {
$args['hide_empty'] = $args['ignore_empty'];
unset( $args['ignore_empty'] );
}
$args['fields'] = 'count';
return get_terms( $taxonomy, $args );
}
/**
* Will unlink the object from the taxonomy or taxonomies.
*
* Will remove all relationships between the object and any terms in
* a particular taxonomy or taxonomies. Does not remove the term or
* taxonomy itself.
*
* @since 2.3.0
*
* @param int $object_id The term Object Id that refers to the term.
* @param string|array $taxonomies List of Taxonomy Names or single Taxonomy name.
*/
function wp_delete_object_term_relationships( $object_id, $taxonomies ) {
$object_id = (int) $object_id;
if ( ! is_array( $taxonomies ) ) {
$taxonomies = array( $taxonomies );
}
foreach ( (array) $taxonomies as $taxonomy ) {
$term_ids = wp_get_object_terms( $object_id, $taxonomy, array( 'fields' => 'ids' ) );
$term_ids = array_map( 'intval', $term_ids );
wp_remove_object_terms( $object_id, $term_ids, $taxonomy );
}
}
/**
* Removes a term from the database.
*
* If the term is a parent of other terms, then the children will be updated to
* that term's parent.
*
* Metadata associated with the term will be deleted.
*
* @since 2.3.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int $term Term ID.
* @param string $taxonomy Taxonomy Name.
* @param array|string $args {
* Optional. Array of arguments to override the default term ID. Default empty array.
*
* @type int $default The term ID to make the default term. This will only override
* the terms found if there is only one term found. Any other and
* the found terms are used.
* @type bool $force_default Optional. Whether to force the supplied term as default to be
* assigned even if the object was not going to be term-less.
* Default false.
* }
* @return bool|int|WP_Error True on success, false if term does not exist. Zero on attempted
* deletion of default Category. WP_Error if the taxonomy does not exist.
*/
function wp_delete_term( $term, $taxonomy, $args = array() ) {
global $wpdb;
$term = (int) $term;
if ( ! $ids = term_exists( $term, $taxonomy ) ) {
return false;
}
if ( is_wp_error( $ids ) ) {
return $ids;
}
$tt_id = $ids['term_taxonomy_id'];
$defaults = array();
if ( 'category' == $taxonomy ) {
$defaults['default'] = get_option( 'default_category' );
if ( $defaults['default'] == $term ) {
return 0; // Don't delete the default category
}
}
$args = wp_parse_args( $args, $defaults );
if ( isset( $args['default'] ) ) {
$default = (int) $args['default'];
if ( ! term_exists( $default, $taxonomy ) ) {
unset( $default );
}
}
if ( isset( $args['force_default'] ) ) {
$force_default = $args['force_default'];
}
/**
* Fires when deleting a term, before any modifications are made to posts or terms.
*
* @since 4.1.0
*
* @param int $term Term ID.
* @param string $taxonomy Taxonomy Name.
*/
do_action( 'pre_delete_term', $term, $taxonomy );
// Update children to point to new parent
if ( is_taxonomy_hierarchical( $taxonomy ) ) {
$term_obj = get_term( $term, $taxonomy );
if ( is_wp_error( $term_obj ) ) {
return $term_obj;
}
$parent = $term_obj->parent;
$edit_ids = $wpdb->get_results( "SELECT term_id, term_taxonomy_id FROM $wpdb->term_taxonomy WHERE `parent` = " . (int) $term_obj->term_id );
$edit_tt_ids = wp_list_pluck( $edit_ids, 'term_taxonomy_id' );
/**
* Fires immediately before a term to delete's children are reassigned a parent.
*
* @since 2.9.0
*
* @param array $edit_tt_ids An array of term taxonomy IDs for the given term.
*/
do_action( 'edit_term_taxonomies', $edit_tt_ids );
$wpdb->update( $wpdb->term_taxonomy, compact( 'parent' ), array( 'parent' => $term_obj->term_id ) + compact( 'taxonomy' ) );
// Clean the cache for all child terms.
$edit_term_ids = wp_list_pluck( $edit_ids, 'term_id' );
clean_term_cache( $edit_term_ids, $taxonomy );
/**
* Fires immediately after a term to delete's children are reassigned a parent.
*
* @since 2.9.0
*
* @param array $edit_tt_ids An array of term taxonomy IDs for the given term.
*/
do_action( 'edited_term_taxonomies', $edit_tt_ids );
}
// Get the term before deleting it or its term relationships so we can pass to actions below.
$deleted_term = get_term( $term, $taxonomy );
$object_ids = (array) $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $tt_id ) );
foreach ( $object_ids as $object_id ) {
$terms = wp_get_object_terms(
$object_id,
$taxonomy,
array(
'fields' => 'ids',
'orderby' => 'none',
)
);
if ( 1 == count( $terms ) && isset( $default ) ) {
$terms = array( $default );
} else {
$terms = array_diff( $terms, array( $term ) );
if ( isset( $default ) && isset( $force_default ) && $force_default ) {
$terms = array_merge( $terms, array( $default ) );
}
}
$terms = array_map( 'intval', $terms );
wp_set_object_terms( $object_id, $terms, $taxonomy );
}
// Clean the relationship caches for all object types using this term.
$tax_object = get_taxonomy( $taxonomy );
foreach ( $tax_object->object_type as $object_type ) {
clean_object_term_cache( $object_ids, $object_type );
}
$term_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->termmeta WHERE term_id = %d ", $term ) );
foreach ( $term_meta_ids as $mid ) {
delete_metadata_by_mid( 'term', $mid );
}
/**
* Fires immediately before a term taxonomy ID is deleted.
*
* @since 2.9.0
*
* @param int $tt_id Term taxonomy ID.
*/
do_action( 'delete_term_taxonomy', $tt_id );
$wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $tt_id ) );
/**
* Fires immediately after a term taxonomy ID is deleted.
*
* @since 2.9.0
*
* @param int $tt_id Term taxonomy ID.
*/
do_action( 'deleted_term_taxonomy', $tt_id );
// Delete the term if no taxonomies use it.
if ( ! $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE term_id = %d", $term ) ) ) {
$wpdb->delete( $wpdb->terms, array( 'term_id' => $term ) );
}
clean_term_cache( $term, $taxonomy );
/**
* Fires after a term is deleted from the database and the cache is cleaned.
*
* @since 2.5.0
* @since 4.5.0 Introduced the `$object_ids` argument.
*
* @param int $term Term ID.
* @param int $tt_id Term taxonomy ID.
* @param string $taxonomy Taxonomy slug.
* @param mixed $deleted_term Copy of the already-deleted term, in the form specified
* by the parent function. WP_Error otherwise.
* @param array $object_ids List of term object IDs.
*/
do_action( 'delete_term', $term, $tt_id, $taxonomy, $deleted_term, $object_ids );
/**
* Fires after a term in a specific taxonomy is deleted.
*
* The dynamic portion of the hook name, `$taxonomy`, refers to the specific
* taxonomy the term belonged to.
*
* @since 2.3.0
* @since 4.5.0 Introduced the `$object_ids` argument.
*
* @param int $term Term ID.
* @param int $tt_id Term taxonomy ID.
* @param mixed $deleted_term Copy of the already-deleted term, in the form specified
* by the parent function. WP_Error otherwise.
* @param array $object_ids List of term object IDs.
*/
do_action( "delete_{$taxonomy}", $term, $tt_id, $deleted_term, $object_ids );
return true;
}
/**
* Deletes one existing category.
*
* @since 2.0.0
*
* @param int $cat_ID Category term ID.
* @return bool|int|WP_Error Returns true if completes delete action; false if term doesn't exist;
* Zero on attempted deletion of default Category; WP_Error object is also a possibility.
*/
function wp_delete_category( $cat_ID ) {
return wp_delete_term( $cat_ID, 'category' );
}
/**
* Retrieves the terms associated with the given object(s), in the supplied taxonomies.
*
* @since 2.3.0
* @since 4.2.0 Added support for 'taxonomy', 'parent', and 'term_taxonomy_id' values of `$orderby`.
* Introduced `$parent` argument.
* @since 4.4.0 Introduced `$meta_query` and `$update_term_meta_cache` arguments. When `$fields` is 'all' or
* 'all_with_object_id', an array of `WP_Term` objects will be returned.
* @since 4.7.0 Refactored to use WP_Term_Query, and to support any WP_Term_Query arguments.
*
* @param int|array $object_ids The ID(s) of the object(s) to retrieve.
* @param string|array $taxonomies The taxonomies to retrieve terms from.
* @param array|string $args See WP_Term_Query::__construct() for supported arguments.
* @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.
*/
function wp_get_object_terms( $object_ids, $taxonomies, $args = array() ) {
if ( empty( $object_ids ) || empty( $taxonomies ) ) {
return array();
}
if ( ! is_array( $taxonomies ) ) {
$taxonomies = array( $taxonomies );
}
foreach ( $taxonomies as $taxonomy ) {
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
}
if ( ! is_array( $object_ids ) ) {
$object_ids = array( $object_ids );
}
$object_ids = array_map( 'intval', $object_ids );
$args = wp_parse_args( $args );
/**
* Filter arguments for retrieving object terms.
*
* @since 4.9.0
*
* @param array $args An array of arguments for retrieving terms for the given object(s).
* See {@see wp_get_object_terms()} for details.
* @param int|array $object_ids Object ID or array of IDs.
* @param string|array $taxonomies The taxonomies to retrieve terms from.
*/
$args = apply_filters( 'wp_get_object_terms_args', $args, $object_ids, $taxonomies );
/*
* When one or more queried taxonomies is registered with an 'args' array,
* those params override the `$args` passed to this function.
*/
$terms = array();
if ( count( $taxonomies ) > 1 ) {
foreach ( $taxonomies as $index => $taxonomy ) {
$t = get_taxonomy( $taxonomy );
if ( isset( $t->args ) && is_array( $t->args ) && $args != array_merge( $args, $t->args ) ) {
unset( $taxonomies[ $index ] );
$terms = array_merge( $terms, wp_get_object_terms( $object_ids, $taxonomy, array_merge( $args, $t->args ) ) );
}
}
} else {
$t = get_taxonomy( $taxonomies[0] );
if ( isset( $t->args ) && is_array( $t->args ) ) {
$args = array_merge( $args, $t->args );
}
}
$args['taxonomy'] = $taxonomies;
$args['object_ids'] = $object_ids;
// Taxonomies registered without an 'args' param are handled here.
if ( ! empty( $taxonomies ) ) {
$terms_from_remaining_taxonomies = get_terms( $args );
// Array keys should be preserved for values of $fields that use term_id for keys.
if ( ! empty( $args['fields'] ) && 0 === strpos( $args['fields'], 'id=>' ) ) {
$terms = $terms + $terms_from_remaining_taxonomies;
} else {
$terms = array_merge( $terms, $terms_from_remaining_taxonomies );
}
}
/**
* Filters the terms for a given object or objects.
*
* @since 4.2.0
*
* @param array $terms An array of terms for the given object or objects.
* @param array $object_ids Array of object IDs for which `$terms` were retrieved.
* @param array $taxonomies Array of taxonomies from which `$terms` were retrieved.
* @param array $args An array of arguments for retrieving terms for the given
* object(s). See wp_get_object_terms() for details.
*/
$terms = apply_filters( 'get_object_terms', $terms, $object_ids, $taxonomies, $args );
$object_ids = implode( ',', $object_ids );
$taxonomies = "'" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "'";
/**
* Filters the terms for a given object or objects.
*
* The `$taxonomies` parameter passed to this filter is formatted as a SQL fragment. The
* {@see 'get_object_terms'} filter is recommended as an alternative.
*
* @since 2.8.0
*
* @param array $terms An array of terms for the given object or objects.
* @param int|array $object_ids Object ID or array of IDs.
* @param string $taxonomies SQL-formatted (comma-separated and quoted) list of taxonomy names.
* @param array $args An array of arguments for retrieving terms for the given object(s).
* See wp_get_object_terms() for details.
*/
return apply_filters( 'wp_get_object_terms', $terms, $object_ids, $taxonomies, $args );
}
/**
* Add a new term to the database.
*
* A non-existent term is inserted in the following sequence:
* 1. The term is added to the term table, then related to the taxonomy.
* 2. If everything is correct, several actions are fired.
* 3. The 'term_id_filter' is evaluated.
* 4. The term cache is cleaned.
* 5. Several more actions are fired.
* 6. An array is returned containing the term_id and term_taxonomy_id.
*
* If the 'slug' argument is not empty, then it is checked to see if the term
* is invalid. If it is not a valid, existing term, it is added and the term_id
* is given.
*
* If the taxonomy is hierarchical, and the 'parent' argument is not empty,
* the term is inserted and the term_id will be given.
*
* Error handling:
* If $taxonomy does not exist or $term is empty,
* a WP_Error object will be returned.
*
* If the term already exists on the same hierarchical level,
* or the term slug and name are not unique, a WP_Error object will be returned.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @since 2.3.0
*
* @param string $term The term to add or update.
* @param string $taxonomy The taxonomy to which to add the term.
* @param array|string $args {
* Optional. Array or string of arguments for inserting a term.
*
* @type string $alias_of Slug of the term to make this term an alias of.
* Default empty string. Accepts a term slug.
* @type string $description The term description. Default empty string.
* @type int $parent The id of the parent term. Default 0.
* @type string $slug The term slug to use. Default empty string.
* }
* @return array|WP_Error An array containing the `term_id` and `term_taxonomy_id`,
* WP_Error otherwise.
*/
function wp_insert_term( $term, $taxonomy, $args = array() ) {
global $wpdb;
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
/**
* Filters a term before it is sanitized and inserted into the database.
*
* @since 3.0.0
*
* @param string $term The term to add or update.
* @param string $taxonomy Taxonomy slug.
*/
$term = apply_filters( 'pre_insert_term', $term, $taxonomy );
if ( is_wp_error( $term ) ) {
return $term;
}
if ( is_int( $term ) && 0 == $term ) {
return new WP_Error( 'invalid_term_id', __( 'Invalid term ID.' ) );
}
if ( '' == trim( $term ) ) {
return new WP_Error( 'empty_term_name', __( 'A name is required for this term.' ) );
}
$defaults = array(
'alias_of' => '',
'description' => '',
'parent' => 0,
'slug' => '',
);
$args = wp_parse_args( $args, $defaults );
if ( $args['parent'] > 0 && ! term_exists( (int) $args['parent'] ) ) {
return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) );
}
$args['name'] = $term;
$args['taxonomy'] = $taxonomy;
// Coerce null description to strings, to avoid database errors.
$args['description'] = (string) $args['description'];
$args = sanitize_term( $args, $taxonomy, 'db' );
// expected_slashed ($name)
$name = wp_unslash( $args['name'] );
$description = wp_unslash( $args['description'] );
$parent = (int) $args['parent'];
$slug_provided = ! empty( $args['slug'] );
if ( ! $slug_provided ) {
$slug = sanitize_title( $name );
} else {
$slug = $args['slug'];
}
$term_group = 0;
if ( $args['alias_of'] ) {
$alias = get_term_by( 'slug', $args['alias_of'], $taxonomy );
if ( ! empty( $alias->term_group ) ) {
// The alias we want is already in a group, so let's use that one.
$term_group = $alias->term_group;
} elseif ( ! empty( $alias->term_id ) ) {
/*
* The alias is not in a group, so we create a new one
* and add the alias to it.
*/
$term_group = $wpdb->get_var( "SELECT MAX(term_group) FROM $wpdb->terms" ) + 1;
wp_update_term(
$alias->term_id,
$taxonomy,
array(
'term_group' => $term_group,
)
);
}
}
/*
* Prevent the creation of terms with duplicate names at the same level of a taxonomy hierarchy,
* unless a unique slug has been explicitly provided.
*/
$name_matches = get_terms(
$taxonomy,
array(
'name' => $name,
'hide_empty' => false,
'parent' => $args['parent'],
'update_term_meta_cache' => false,
)
);
/*
* The `name` match in `get_terms()` doesn't differentiate accented characters,
* so we do a stricter comparison here.
*/
$name_match = null;
if ( $name_matches ) {
foreach ( $name_matches as $_match ) {
if ( strtolower( $name ) === strtolower( $_match->name ) ) {
$name_match = $_match;
break;
}
}
}
if ( $name_match ) {
$slug_match = get_term_by( 'slug', $slug, $taxonomy );
if ( ! $slug_provided || $name_match->slug === $slug || $slug_match ) {
if ( is_taxonomy_hierarchical( $taxonomy ) ) {
$siblings = get_terms(
$taxonomy,
array(
'get' => 'all',
'parent' => $parent,
'update_term_meta_cache' => false,
)
);
$existing_term = null;
if ( ( ! $slug_provided || $name_match->slug === $slug ) && in_array( $name, wp_list_pluck( $siblings, 'name' ) ) ) {
$existing_term = $name_match;
} elseif ( $slug_match && in_array( $slug, wp_list_pluck( $siblings, 'slug' ) ) ) {
$existing_term = $slug_match;
}
if ( $existing_term ) {
return new WP_Error( 'term_exists', __( 'A term with the name provided already exists with this parent.' ), $existing_term->term_id );
}
} else {
return new WP_Error( 'term_exists', __( 'A term with the name provided already exists in this taxonomy.' ), $name_match->term_id );
}
}
}
$slug = wp_unique_term_slug( $slug, (object) $args );
$data = compact( 'name', 'slug', 'term_group' );
/**
* Filters term data before it is inserted into the database.
*
* @since 4.7.0
*
* @param array $data Term data to be inserted.
* @param string $taxonomy Taxonomy slug.
* @param array $args Arguments passed to wp_insert_term().
*/
$data = apply_filters( 'wp_insert_term_data', $data, $taxonomy, $args );
if ( false === $wpdb->insert( $wpdb->terms, $data ) ) {
return new WP_Error( 'db_insert_error', __( 'Could not insert term into the database.' ), $wpdb->last_error );
}
$term_id = (int) $wpdb->insert_id;
// Seems unreachable, However, Is used in the case that a term name is provided, which sanitizes to an empty string.
if ( empty( $slug ) ) {
$slug = sanitize_title( $slug, $term_id );
/** This action is documented in wp-includes/taxonomy.php */
do_action( 'edit_terms', $term_id, $taxonomy );
$wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) );
/** This action is documented in wp-includes/taxonomy.php */
do_action( 'edited_terms', $term_id, $taxonomy );
}
$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 ) );
if ( ! empty( $tt_id ) ) {
return array(
'term_id' => $term_id,
'term_taxonomy_id' => $tt_id,
);
}
$wpdb->insert( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent' ) + array( 'count' => 0 ) );
$tt_id = (int) $wpdb->insert_id;
/*
* Sanity check: if we just created a term with the same parent + taxonomy + slug but a higher term_id than
* an existing term, then we have unwittingly created a duplicate term. Delete the dupe, and use the term_id
* and term_taxonomy_id of the older term instead. Then return out of the function so that the "create" hooks
* are not fired.
*/
$duplicate_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.term_id, t.slug, tt.term_taxonomy_id, tt.taxonomy FROM $wpdb->terms t INNER JOIN $wpdb->term_taxonomy tt ON ( tt.term_id = t.term_id ) WHERE t.slug = %s AND tt.parent = %d AND tt.taxonomy = %s AND t.term_id < %d AND tt.term_taxonomy_id != %d", $slug, $parent, $taxonomy, $term_id, $tt_id ) );
/**
* Filters the duplicate term check that takes place during term creation.
*
* Term parent+taxonomy+slug combinations are meant to be unique, and wp_insert_term()
* performs a last-minute confirmation of this uniqueness before allowing a new term
* to be created. Plugins with different uniqueness requirements may use this filter
* to bypass or modify the duplicate-term check.
*
* @since 5.0.0
*
* @param object $duplicate_term Duplicate term row from terms table, if found.
* @param string $term Term being inserted.
* @param string $taxonomy Taxonomy name.
* @param array $args Term arguments passed to the function.
* @param int $tt_id term_taxonomy_id for the newly created term.
*/
$duplicate_term = apply_filters( 'wp_insert_term_duplicate_term_check', $duplicate_term, $term, $taxonomy, $args, $tt_id );
if ( $duplicate_term ) {
$wpdb->delete( $wpdb->terms, array( 'term_id' => $term_id ) );
$wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $tt_id ) );
$term_id = (int) $duplicate_term->term_id;
$tt_id = (int) $duplicate_term->term_taxonomy_id;
clean_term_cache( $term_id, $taxonomy );
return array(
'term_id' => $term_id,
'term_taxonomy_id' => $tt_id,
);
}
/**
* Fires immediately after a new term is created, before the term cache is cleaned.
*
* @since 2.3.0
*
* @param int $term_id Term ID.
* @param int $tt_id Term taxonomy ID.
* @param string $taxonomy Taxonomy slug.
*/
do_action( 'create_term', $term_id, $tt_id, $taxonomy );
/**
* Fires after a new term is created for a specific taxonomy.
*
* The dynamic portion of the hook name, `$taxonomy`, refers
* to the slug of the taxonomy the term was created for.
*
* @since 2.3.0
*
* @param int $term_id Term ID.
* @param int $tt_id Term taxonomy ID.
*/
do_action( "create_{$taxonomy}", $term_id, $tt_id );
/**
* Filters the term ID after a new term is created.
*
* @since 2.3.0
*
* @param int $term_id Term ID.
* @param int $tt_id Taxonomy term ID.
*/
$term_id = apply_filters( 'term_id_filter', $term_id, $tt_id );
clean_term_cache( $term_id, $taxonomy );
/**
* Fires after a new term is created, and after the term cache has been cleaned.
*
* @since 2.3.0
*
* @param int $term_id Term ID.
* @param int $tt_id Term taxonomy ID.
* @param string $taxonomy Taxonomy slug.
*/
do_action( 'created_term', $term_id, $tt_id, $taxonomy );
/**
* Fires after a new term in a specific taxonomy is created, and after the term
* cache has been cleaned.
*
* The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug.
*
* @since 2.3.0
*
* @param int $term_id Term ID.
* @param int $tt_id Term taxonomy ID.
*/
do_action( "created_{$taxonomy}", $term_id, $tt_id );
return array(
'term_id' => $term_id,
'term_taxonomy_id' => $tt_id,
);
}
/**
* Create Term and Taxonomy Relationships.
*
* Relates an object (post, link etc) to a term and taxonomy type. Creates the
* term and taxonomy relationship if it doesn't already exist. Creates a term if
* it doesn't exist (using the slug).
*
* A relationship means that the term is grouped in or belongs to the taxonomy.
* A term has no meaning until it is given context by defining which taxonomy it
* exists under.
*
* @since 2.3.0
*
* @global wpdb $wpdb The WordPress database abstraction object.
*
* @param int $object_id The object to relate to.
* @param string|int|array $terms A single term slug, single term id, or array of either term slugs or ids.
* Will replace all existing related terms in this taxonomy. Passing an
* empty value will remove all related terms.
* @param string $taxonomy The context in which to relate the term to the object.
* @param bool $append Optional. If false will delete difference of terms. Default false.
* @return array|WP_Error Term taxonomy IDs of the affected terms.
*/
function wp_set_object_terms( $object_id, $terms, $taxonomy, $append = false ) {
global $wpdb;
$object_id = (int) $object_id;
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
if ( ! is_array( $terms ) ) {
$terms = array( $terms );
}
if ( ! $append ) {
$old_tt_ids = wp_get_object_terms(
$object_id,
$taxonomy,
array(
'fields' => 'tt_ids',
'orderby' => 'none',
'update_term_meta_cache' => false,
)
);
} else {
$old_tt_ids = array();
}
$tt_ids = array();
$term_ids = array();
$new_tt_ids = array();
foreach ( (array) $terms as $term ) {
if ( ! strlen( trim( $term ) ) ) {
continue;
}
if ( ! $term_info = term_exists( $term, $taxonomy ) ) {
// Skip if a non-existent term ID is passed.
if ( is_int( $term ) ) {
continue;
}
$term_info = wp_insert_term( $term, $taxonomy );
}
if ( is_wp_error( $term_info ) ) {
return $term_info;
}
$term_ids[] = $term_info['term_id'];
$tt_id = $term_info['term_taxonomy_id'];
$tt_ids[] = $tt_id;
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, $tt_id ) ) ) {
continue;
}
/**
* Fires immediately before an object-term relationship is added.
*
* @since 2.9.0
* @since 4.7.0 Added the `$taxonomy` parameter.
*
* @param int $object_id Object ID.
* @param int $tt_id Term taxonomy ID.
* @param string $taxonomy Taxonomy slug.
*/
do_action( 'add_term_relationship', $object_id, $tt_id, $taxonomy );
$wpdb->insert(
$wpdb->term_relationships,
array(
'object_id' => $object_id,
'term_taxonomy_id' => $tt_id,
)
);
/**
* Fires immediately after an object-term relationship is added.
*
* @since 2.9.0
* @since 4.7.0 Added the `$taxonomy` parameter.
*
* @param int $object_id Object ID.
* @param int $tt_id Term taxonomy ID.
* @param string $taxonomy Taxonomy slug.
*/
do_action( 'added_term_relationship', $object_id, $tt_id, $taxonomy );
$new_tt_ids[] = $tt_id;
}
if ( $new_tt_ids ) {
wp_update_term_count( $new_tt_ids, $taxonomy );
}
if ( ! $append ) {
$delete_tt_ids = array_diff( $old_tt_ids, $tt_ids );
if ( $delete_tt_ids ) {
$in_delete_tt_ids = "'" . implode( "', '", $delete_tt_ids ) . "'";
$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 ) );
$delete_term_ids = array_map( 'intval', $delete_term_ids );
$remove = wp_remove_object_terms( $object_id, $delete_term_ids, $taxonomy );
if ( is_wp_error( $remove ) ) {
return $remove;
}
}
}
$t = get_taxonomy( $taxonomy );
if ( ! $append && isset( $t->sort ) && $t->sort ) {
$values = array();
$term_order = 0;
$final_tt_ids = wp_get_object_terms(
$object_id,
$taxonomy,
array(
'fields' => 'tt_ids',
'update_term_meta_cache' => false,
)
);
foreach ( $tt_ids as $tt_id ) {
if ( in_array( $tt_id, $final_tt_ids ) ) {
$values[] = $wpdb->prepare( '(%d, %d, %d)', $object_id, $tt_id, ++$term_order );
}
}
if ( $values ) {
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)' ) ) {
return new WP_Error( 'db_insert_error', __( 'Could not insert term relationship into the database.' ), $wpdb->last_error );
}
}
}
wp_cache_delete( $object_id, $taxonomy . '_relationships' );
wp_cache_delete( 'last_changed', 'terms' );
/**
* Fires after an object's terms have been set.
*
* @since 2.8.0
*
* @param int $object_id Object ID.
* @param array $terms An array of object terms.
* @param array $tt_ids An array of term taxonomy IDs.
* @param string $taxonomy Taxonomy slug.
* @param bool $append Whether to append new terms to the old terms.
* @param array $old_tt_ids Old array of term taxonomy IDs.
*/
do_action( 'set_object_terms', $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids );
return $tt_ids;
}
/**
* Add term(s) associated with a given object.
*
* @since 3.6.0
*
* @param int $object_id The ID of the object to which the terms will be added.
* @param string|int|array $terms The slug(s) or ID(s) of the term(s) to add.
* @param array|string $taxonomy Taxonomy name.
* @return array|WP_Error Term taxonomy IDs of the affected terms.
*/
function wp_add_object_terms( $object_id, $terms, $taxonomy ) {
return wp_set_object_terms( $object_id, $terms, $taxonomy, true );
}
/**
* Remove term(s) associated with a given object.
*
* @since 3.6.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int $object_id The ID of the object from which the terms will be removed.
* @param string|int|array $terms The slug(s) or ID(s) of the term(s) to remove.
* @param array|string $taxonomy Taxonomy name.
* @return bool|WP_Error True on success, false or WP_Error on failure.
*/
function wp_remove_object_terms( $object_id, $terms, $taxonomy ) {
global $wpdb;
$object_id = (int) $object_id;
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
if ( ! is_array( $terms ) ) {
$terms = array( $terms );
}
$tt_ids = array();
foreach ( (array) $terms as $term ) {
if ( ! strlen( trim( $term ) ) ) {
continue;
}
if ( ! $term_info = term_exists( $term, $taxonomy ) ) {
// Skip if a non-existent term ID is passed.
if ( is_int( $term ) ) {
continue;
}
}
if ( is_wp_error( $term_info ) ) {
return $term_info;
}
$tt_ids[] = $term_info['term_taxonomy_id'];
}
if ( $tt_ids ) {
$in_tt_ids = "'" . implode( "', '", $tt_ids ) . "'";
/**
* Fires immediately before an object-term relationship is deleted.
*
* @since 2.9.0
* @since 4.7.0 Added the `$taxonomy` parameter.
*
* @param int $object_id Object ID.
* @param array $tt_ids An array of term taxonomy IDs.
* @param string $taxonomy Taxonomy slug.
*/
do_action( 'delete_term_relationships', $object_id, $tt_ids, $taxonomy );
$deleted = $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id IN ($in_tt_ids)", $object_id ) );
wp_cache_delete( $object_id, $taxonomy . '_relationships' );
wp_cache_delete( 'last_changed', 'terms' );
/**
* Fires immediately after an object-term relationship is deleted.
*
* @since 2.9.0
* @since 4.7.0 Added the `$taxonomy` parameter.
*
* @param int $object_id Object ID.
* @param array $tt_ids An array of term taxonomy IDs.
* @param string $taxonomy Taxonomy slug.
*/
do_action( 'deleted_term_relationships', $object_id, $tt_ids, $taxonomy );
wp_update_term_count( $tt_ids, $taxonomy );
return (bool) $deleted;
}
return false;
}
/**
* Will make slug unique, if it isn't already.
*
* The `$slug` has to be unique global to every taxonomy, meaning that one
* taxonomy term can't have a matching slug with another taxonomy term. Each
* slug has to be globally unique for every taxonomy.
*
* The way this works is that if the taxonomy that the term belongs to is
* hierarchical and has a parent, it will append that parent to the $slug.
*
* If that still doesn't return an unique slug, then it try to append a number
* until it finds a number that is truly unique.
*
* The only purpose for `$term` is for appending a parent, if one exists.
*
* @since 2.3.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $slug The string that will be tried for a unique slug.
* @param object $term The term object that the `$slug` will belong to.
* @return string Will return a true unique slug.
*/
function wp_unique_term_slug( $slug, $term ) {
global $wpdb;
$needs_suffix = true;
$original_slug = $slug;
// As of 4.1, duplicate slugs are allowed as long as they're in different taxonomies.
if ( ! term_exists( $slug ) || get_option( 'db_version' ) >= 30133 && ! get_term_by( 'slug', $slug, $term->taxonomy ) ) {
$needs_suffix = false;
}
/*
* If the taxonomy supports hierarchy and the term has a parent, make the slug unique
* by incorporating parent slugs.
*/
$parent_suffix = '';
if ( $needs_suffix && is_taxonomy_hierarchical( $term->taxonomy ) && ! empty( $term->parent ) ) {
$the_parent = $term->parent;
while ( ! empty( $the_parent ) ) {
$parent_term = get_term( $the_parent, $term->taxonomy );
if ( is_wp_error( $parent_term ) || empty( $parent_term ) ) {
break;
}
$parent_suffix .= '-' . $parent_term->slug;
if ( ! term_exists( $slug . $parent_suffix ) ) {
break;
}
if ( empty( $parent_term->parent ) ) {
break;
}
$the_parent = $parent_term->parent;
}
}
// If we didn't get a unique slug, try appending a number to make it unique.
/**
* Filters whether the proposed unique term slug is bad.
*
* @since 4.3.0
*
* @param bool $needs_suffix Whether the slug needs to be made unique with a suffix.
* @param string $slug The slug.
* @param object $term Term object.
*/
if ( apply_filters( 'wp_unique_term_slug_is_bad_slug', $needs_suffix, $slug, $term ) ) {
if ( $parent_suffix ) {
$slug .= $parent_suffix;
} else {
if ( ! empty( $term->term_id ) ) {
$query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s AND term_id != %d", $slug, $term->term_id );
} else {
$query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $slug );
}
if ( $wpdb->get_var( $query ) ) {
$num = 2;
do {
$alt_slug = $slug . "-$num";
$num++;
$slug_check = $wpdb->get_var( $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $alt_slug ) );
} while ( $slug_check );
$slug = $alt_slug;
}
}
}
/**
* Filters the unique term slug.
*
* @since 4.3.0
*
* @param string $slug Unique term slug.
* @param object $term Term object.
* @param string $original_slug Slug originally passed to the function for testing.
*/
return apply_filters( 'wp_unique_term_slug', $slug, $term, $original_slug );
}
/**
* Update term based on arguments provided.
*
* The $args will indiscriminately override all values with the same field name.
* Care must be taken to not override important information need to update or
* update will fail (or perhaps create a new term, neither would be acceptable).
*
* Defaults will set 'alias_of', 'description', 'parent', and 'slug' if not
* defined in $args already.
*
* 'alias_of' will create a term group, if it doesn't already exist, and update
* it for the $term.
*
* If the 'slug' argument in $args is missing, then the 'name' in $args will be
* used. It should also be noted that if you set 'slug' and it isn't unique then
* a WP_Error will be passed back. If you don't pass any slug, then a unique one
* will be created for you.
*
* For what can be overrode in `$args`, check the term scheme can contain and stay
* away from the term keys.
*
* @since 2.3.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int $term_id The ID of the term
* @param string $taxonomy The context in which to relate the term to the object.
* @param array|string $args Optional. Array of get_terms() arguments. Default empty array.
* @return array|WP_Error Returns Term ID and Taxonomy Term ID
*/
function wp_update_term( $term_id, $taxonomy, $args = array() ) {
global $wpdb;
if ( ! taxonomy_exists( $taxonomy ) ) {
return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
}
$term_id = (int) $term_id;
// First, get all of the original args
$term = get_term( $term_id, $taxonomy );
if ( is_wp_error( $term ) ) {
return $term;
}
if ( ! $term ) {
return new WP_Error( 'invalid_term', __( 'Empty Term.' ) );
}
$term = (array) $term->data;
// Escape data pulled from DB.
$term = wp_slash( $term );
// Merge old and new args with new args overwriting old ones.
$args = array_merge( $term, $args );
$defaults = array(
'alias_of' => '',
'description' => '',
'parent' => 0,
'slug' => '',
);
$args = wp_parse_args( $args, $defaults );
$args = sanitize_term( $args, $taxonomy, 'db' );
$parsed_args = $args;
// expected_slashed ($name)
$name = wp_unslash( $args['name'] );
$description = wp_unslash( $args['description'] );
$parsed_args['name'] = $name;
$parsed_args['description'] = $description;
if ( '' == trim( $name ) ) {
return new WP_Error( 'empty_term_name', __( 'A name is required for this term.' ) );
}
if ( $parsed_args['parent'] > 0 && ! term_exists( (int) $parsed_args['parent'] ) ) {
return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) );
}
$empty_slug = false;
if ( empty( $args['slug'] ) ) {
$empty_slug = true;
$slug = sanitize_title( $name );
} else {
$slug = $args['slug'];
}
$parsed_args['slug'] = $slug;
$term_group = isset( $parsed_args['term_group'] ) ? $parsed_args['term_group'] : 0;
if ( $args['alias_of'] ) {
$alias = get_term_by( 'slug', $args['alias_of'], $taxonomy );
if ( ! empty( $alias->term_group ) ) {
// The alias we want is already in a group, so let's use that one.
$term_group = $alias->term_group;
} elseif ( ! empty( $alias->term_id ) ) {