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taxonomy.php
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taxonomy.php
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<?php
/**
* Taxonomy API
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*/
//
// Taxonomy Registration
//
/**
* Creates the initial taxonomies when 'init' action is fired.
*/
function create_initial_taxonomies() {
register_taxonomy( 'category', 'post', array( 'hierarchical' => true,
'update_count_callback' => '_update_post_term_count',
'label' => __('Categories'),
'singular_label' => __('Category'),
'query_var' => false,
'rewrite' => false,
'public' => true,
'show_ui' => true,
'_builtin' => true
) ) ;
register_taxonomy( 'post_tag', 'post', array(
'hierarchical' => false,
'update_count_callback' => '_update_post_term_count',
'label' => __('Post Tags'),
'singular_label' => __('Post Tag'),
'query_var' => false,
'rewrite' => false,
'public' => true,
'show_ui' => true,
'_builtin' => true
) ) ;
register_taxonomy( 'nav_menu', 'nav_menu_item', array( 'hierarchical' => false,
'query_var' => false,
'rewrite' => false,
'show_ui' => false,
) ) ;
register_taxonomy( 'link_category', 'link', array( 'hierarchical' => false,
'label' => __('Categories'),
'query_var' => false,
'rewrite' => false,
'public' => false,
'show_ui' => false,
'_builtin' => true,
) ) ;
}
add_action( 'init', 'create_initial_taxonomies', 0 ); // highest priority
/**
* Return all of the taxonomy names that are of $object_type.
*
* It appears that this function can be used to find all of the names inside of
* $wp_taxonomies global variable.
*
* <code><?php $taxonomies = get_object_taxonomies('post'); ?></code> Should
* result in <code>Array('category', 'post_tag')</code>
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wp_taxonomies
*
* @param array|string|object $object Name of the type of taxonomy object, or an object (row from posts)
* @return array The names of all taxonomy of $object_type.
*/
function get_object_taxonomies($object) {
global $wp_taxonomies;
if ( is_object($object) ) {
if ( $object->post_type == 'attachment' )
return get_attachment_taxonomies($object);
$object = $object->post_type;
}
$object = (array) $object;
$taxonomies = array();
foreach ( (array) $wp_taxonomies as $taxonomy ) {
if ( array_intersect($object, (array) $taxonomy->object_type) )
$taxonomies[] = $taxonomy->name;
}
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.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wp_taxonomies
* @uses is_taxonomy() Checks whether taxonomy exists
*
* @param string $taxonomy Name of taxonomy object to return
* @return object|bool The Taxonomy Object or false if $taxonomy doesn't exist
*/
function get_taxonomy( $taxonomy ) {
global $wp_taxonomies;
if ( ! is_taxonomy($taxonomy) )
return false;
return $wp_taxonomies[$taxonomy];
}
/**
* Checks that the taxonomy name exists.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wp_taxonomies
*
* @param string $taxonomy Name of taxonomy object
* @return bool Whether the taxonomy exists.
*/
function is_taxonomy( $taxonomy ) {
global $wp_taxonomies;
return isset($wp_taxonomies[$taxonomy]);
}
/**
* 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.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses is_taxonomy() Checks whether taxonomy exists
* @uses get_taxonomy() Used to get the taxonomy object
*
* @param string $taxonomy Name of taxonomy object
* @return bool Whether the taxonomy is hierarchical
*/
function is_taxonomy_hierarchical($taxonomy) {
if ( ! is_taxonomy($taxonomy) )
return false;
$taxonomy = get_taxonomy($taxonomy);
return $taxonomy->hierarchical;
}
/**
* Create or modify a taxonomy object. Do not use before init.
*
* A simple function for creating or modifying a taxonomy object based on the
* parameters given. The function will accept an array (third optional
* parameter), along with strings for the taxonomy name and another string for
* the object type.
*
* Nothing is returned, so expect error maybe or use is_taxonomy() to check
* whether taxonomy exists.
*
* Optional $args contents:
*
* hierarachical - has some defined purpose at other parts of the API and is a
* boolean value.
*
* update_count_callback - works much like a hook, in that it will be called
* when the count is updated.
*
* rewrite - false to prevent rewrite, or array('slug'=>$slug) to customize
* permastruct; default will use $taxonomy as slug.
*
* query_var - false to prevent queries, or string to customize query var
* (?$query_var=$term); default will use $taxonomy as query var.
*
* public - If the taxonomy should be publically queryable; //@TODO not implemented.
* defaults to true.
*
* show_ui - If the WordPress UI admin tags UI should apply to this taxonomy;
* defaults to public.
*
* show_tagcloud - false to prevent the taxonomy being listed in the Tag Cloud Widget;
* defaults to show_ui which defalts to public.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
* @uses $wp_taxonomies Inserts new taxonomy object into the list
* @uses $wp_rewrite Adds rewrite tags and permastructs
* @uses $wp Adds query vars
*
* @param string $taxonomy Name of taxonomy object
* @param array|string $object_type Name of the object type for the taxonomy object.
* @param array|string $args See above description for the two keys values.
*/
function register_taxonomy( $taxonomy, $object_type, $args = array() ) {
global $wp_taxonomies, $wp_rewrite, $wp;
if ( ! is_array($wp_taxonomies) )
$wp_taxonomies = array();
$defaults = array( 'hierarchical' => false,
'update_count_callback' => '',
'rewrite' => true,
'query_var' => $taxonomy,
'public' => true,
'show_ui' => null,
'label' => null,
'show_tagcloud' => null,
'_builtin' => false
);
$args = wp_parse_args($args, $defaults);
if ( false !== $args['query_var'] && !empty($wp) ) {
if ( true === $args['query_var'] )
$args['query_var'] = $taxonomy;
$args['query_var'] = sanitize_title_with_dashes($args['query_var']);
$wp->add_query_var($args['query_var']);
}
if ( false !== $args['rewrite'] && '' != get_option('permalink_structure') ) {
$args['rewrite'] = wp_parse_args($args['rewrite'], array(
'slug' => sanitize_title_with_dashes($taxonomy),
'with_front' => true,
));
$wp_rewrite->add_rewrite_tag("%$taxonomy%", '([^/]+)', $args['query_var'] ? "{$args['query_var']}=" : "taxonomy=$taxonomy&term=");
$wp_rewrite->add_permastruct($taxonomy, "{$args['rewrite']['slug']}/%$taxonomy%", $args['rewrite']['with_front']);
}
if ( is_null($args['show_ui']) )
$args['show_ui'] = $args['public'];
if ( is_null($args['show_tagcloud']) )
$args['show_tagcloud'] = $args['show_ui'];
if ( is_null($args['label'] ) )
$args['label'] = $taxonomy;
foreach ( array('manage_cap', 'edit_cap', 'delete_cap') as $cap ) {
if ( empty($args[$cap]) )
$args[$cap] = 'manage_categories';
}
if ( empty($args['assign_cap']) )
$args['assign_cap'] = 'edit_posts';
if ( empty($args['singular_label']) )
$args['singular_label'] = $args['label'];
$args['name'] = $taxonomy;
$args['object_type'] = (array) $object_type;
$wp_taxonomies[$taxonomy] = (object) $args;
// register callback handling for metabox
add_filter('wp_ajax_add-'.$taxonomy, '_wp_ajax_add_hierarchical_term');
}
/**
* Add an already registered taxonomy to an object type.
*
* @package WordPress
* @subpackage Taxonomy
* @since 3.0
* @uses $wp_taxonomies Modifies taxonomy object
*
* @param string $taxonomy Name of taxonomy object
* @param array|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;
$wp_taxonomies[$taxonomy]->object_type[] = $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'.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wpdb
* @uses wp_parse_args() Creates an array from string $args.
*
* @param string|array $terms String of term or array of string values 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( $terms, $taxonomies, $args = array() ) {
global $wpdb;
if ( !is_array( $terms) )
$terms = array($terms);
if ( !is_array($taxonomies) )
$taxonomies = array($taxonomies);
foreach ( (array) $taxonomies as $taxonomy ) {
if ( ! is_taxonomy($taxonomy) )
return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
}
$defaults = array('order' => 'ASC');
$args = wp_parse_args( $args, $defaults );
extract($args, EXTR_SKIP);
$order = ( 'desc' == strtolower($order) ) ? 'DESC' : 'ASC';
$terms = array_map('intval', $terms);
$taxonomies = "'" . implode("', '", $taxonomies) . "'";
$terms = "'" . implode("', '", $terms) . "'";
$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 ($terms) ORDER BY tr.object_id $order");
if ( ! $object_ids )
return array();
return $object_ids;
}
/**
* 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.
*
* '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
* $term.
*
* 'get_$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.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wpdb
* @uses sanitize_term() Cleanses the term based on $filter context before returning.
* @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
*
* @param int|object $term If integer, will get from database. If object will apply filters and return $term.
* @param string $taxonomy Taxonomy name that $term is part of.
* @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N
* @param string $filter Optional, default is raw or no WordPress defined filter will applied.
* @return mixed|null|WP_Error Term Row from database. Will return null if $term is empty. If taxonomy does not
* exist then WP_Error will be returned.
*/
function &get_term($term, $taxonomy, $output = OBJECT, $filter = 'raw') {
global $wpdb;
$null = null;
if ( empty($term) ) {
$error = new WP_Error('invalid_term', __('Empty Term'));
return $error;
}
if ( ! is_taxonomy($taxonomy) ) {
$error = new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
return $error;
}
if ( is_object($term) && empty($term->filter) ) {
wp_cache_add($term->term_id, $term, $taxonomy);
$_term = $term;
} else {
if ( is_object($term) )
$term = $term->term_id;
$term = (int) $term;
if ( ! $_term = wp_cache_get($term, $taxonomy) ) {
$_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 = %s LIMIT 1", $taxonomy, $term) );
if ( ! $_term )
return $null;
wp_cache_add($term, $_term, $taxonomy);
}
}
$_term = apply_filters('get_term', $_term, $taxonomy);
$_term = apply_filters("get_$taxonomy", $_term, $taxonomy);
$_term = sanitize_term($_term, $taxonomy, $filter);
if ( $output == OBJECT ) {
return $_term;
} elseif ( $output == ARRAY_A ) {
$__term = get_object_vars($_term);
return $__term;
} elseif ( $output == ARRAY_N ) {
$__term = array_values(get_object_vars($_term));
return $__term;
} else {
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.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wpdb
* @uses sanitize_term() Cleanses the term based on $filter context before returning.
* @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
*
* @param string $field Either 'slug', 'name', or 'id'
* @param string|int $value Search for this term value
* @param string $taxonomy Taxonomy Name
* @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N
* @param string $filter Optional, default is raw or no WordPress defined filter will applied.
* @return mixed Term Row from database. Will return false if $taxonomy does not exist or $term was not found.
*/
function get_term_by($field, $value, $taxonomy, $output = OBJECT, $filter = 'raw') {
global $wpdb;
if ( ! is_taxonomy($taxonomy) )
return false;
if ( 'slug' == $field ) {
$field = 't.slug';
$value = sanitize_title($value);
if ( empty($value) )
return false;
} else if ( 'name' == $field ) {
// Assume already escaped
$value = stripslashes($value);
$field = 't.name';
} else {
$field = 't.term_id';
$value = (int) $value;
}
$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, $value) );
if ( !$term )
return false;
wp_cache_add($term->term_id, $term, $taxonomy);
$term = sanitize_term($term, $taxonomy, $filter);
if ( $output == OBJECT ) {
return $term;
} elseif ( $output == ARRAY_A ) {
return get_object_vars($term);
} elseif ( $output == ARRAY_N ) {
return array_values(get_object_vars($term));
} else {
return $term;
}
}
/**
* 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.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wpdb
* @uses _get_term_hierarchy()
* @uses get_term_children() Used to get the children of both $taxonomy and the parent $term
*
* @param string $term ID of Term to get children
* @param string $taxonomy Taxonomy Name
* @return array|WP_Error List of Term Objects. WP_Error returned if $taxonomy does not exist
*/
function get_term_children( $term_id, $taxonomy ) {
if ( ! is_taxonomy($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 $child ) {
if ( isset($terms[$child]) )
$children = array_merge($children, get_term_children($child, $taxonomy));
}
return $children;
}
/**
* Get sanitized Term field.
*
* Does checks for $term, based on the $taxonomy. The function is for contextual
* reasons and for simplicity of usage. See sanitize_term_field() for more
* information.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses sanitize_term_field() Passes the return value in sanitize_term_field on success.
*
* @param string $field Term field to fetch
* @param int $term Term ID
* @param string $taxonomy Taxonomy Name
* @param string $context Optional, default is display. Look at sanitize_term_field() for available options.
* @return mixed 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 = (int) $term;
$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, $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.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses sanitize_term() Passes the return value on success
*
* @param int|object $id Term ID or Object
* @param string $taxonomy Taxonomy Name
* @return mixed|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 '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 'list_terms_exclusions' filter passes the compiled exclusions along with
* the $args.
*
* The 'get_terms_orderby' filter passes the ORDER BY clause for the query
* along with the $args array.
* The 'get_terms_fields' filter passes the fields for the SELECT query
* along with the $args array.
*
* The list of arguments that $args can contain, which will overwrite the defaults:
*
* orderby - Default is 'name'. Can be name, count, term_group, slug or nothing
* (will use term_id), Passing a custom value other than these will cause it to
* order based on the custom value.
*
* order - Default is ASC. Can use DESC.
*
* hide_empty - Default is true. Will not return empty terms, which means
* terms whose count is 0 according to the given taxonomy.
*
* exclude - Default is an empty array. An array, comma- or space-delimited string
* of term ids to exclude from the return array. If 'include' is non-empty,
* 'exclude' is ignored.
*
* exclude_tree - Default is an empty array. An array, comma- or space-delimited
* string of term ids to exclude from the return array, along with all of their
* descendant terms according to the primary taxonomy. If 'include' is non-empty,
* 'exclude_tree' is ignored.
*
* include - Default is an empty array. An array, comma- or space-delimited string
* of term ids to include in the return array.
*
* number - The maximum number of terms to return. Default is to return them all.
*
* offset - The number by which to offset the terms query.
*
* fields - Default is 'all', which returns an array of term objects.
* If 'fields' is 'ids' or 'names', returns an array of
* integers or strings, respectively.
*
* slug - Returns terms whose "slug" matches this value. Default is empty string.
*
* hierarchical - Whether to include terms that have non-empty descendants
* (even if 'hide_empty' is set to true).
*
* search - Returned terms' names will contain the value of 'search',
* case-insensitive. Default is an empty string.
*
* name__like - Returned terms' names will begin with the value of 'name__like',
* case-insensitive. Default is empty string.
*
* The argument 'pad_counts', if set to true will include the quantity of a term's
* children in the quantity of each term's "count" object variable.
*
* The 'get' argument, if set to 'all' instead of its default empty string,
* returns terms regardless of ancestry or whether the terms are empty.
*
* The 'child_of' argument, when used, should be set to the integer of a term ID. Its default
* is 0. If set to a non-zero value, all returned terms will be descendants
* of that term according to the given taxonomy. Hence 'child_of' is set to 0
* if more than one taxonomy is passed in $taxonomies, because multiple taxonomies
* make term ancestry ambiguous.
*
* The 'parent' argument, when used, should be set to the integer of a term ID. Its default is
* the empty string '', which has a different meaning from the integer 0.
* If set to an integer value, all returned terms will have as an immediate
* ancestor the term whose ID is specified by that integer according to the given taxonomy.
* The 'parent' argument is different from 'child_of' in that a term X is considered a 'parent'
* of term Y only if term X is the father of term Y, not its grandfather or great-grandfather, etc.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wpdb
* @uses wp_parse_args() Merges the defaults with those defined by $args and allows for strings.
*
* @param string|array Taxonomy name or list of Taxonomy names
* @param string|array $args The values of what to search for when returning terms
* @return array|WP_Error List of Term Objects and their children. Will return WP_Error, if any of $taxonomies do not exist.
*/
function &get_terms($taxonomies, $args = '') {
global $wpdb;
$empty_array = array();
$single_taxonomy = false;
if ( !is_array($taxonomies) ) {
$single_taxonomy = true;
$taxonomies = array($taxonomies);
}
foreach ( (array) $taxonomies as $taxonomy ) {
if ( ! is_taxonomy($taxonomy) ) {
$error = & new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
return $error;
}
}
$in_taxonomies = "'" . implode("', '", $taxonomies) . "'";
$defaults = array('orderby' => 'name', 'order' => 'ASC',
'hide_empty' => true, 'exclude' => array(), 'exclude_tree' => array(), 'include' => array(),
'number' => '', 'fields' => 'all', 'slug' => '', 'parent' => '',
'hierarchical' => true, 'child_of' => 0, 'get' => '', 'name__like' => '',
'pad_counts' => false, 'offset' => '', 'search' => '');
$args = wp_parse_args( $args, $defaults );
$args['number'] = absint( $args['number'] );
$args['offset'] = absint( $args['offset'] );
if ( !$single_taxonomy || !is_taxonomy_hierarchical($taxonomies[0]) ||
'' !== $args['parent'] ) {
$args['child_of'] = 0;
$args['hierarchical'] = false;
$args['pad_counts'] = false;
}
if ( 'all' == $args['get'] ) {
$args['child_of'] = 0;
$args['hide_empty'] = 0;
$args['hierarchical'] = false;
$args['pad_counts'] = false;
}
extract($args, EXTR_SKIP);
if ( $child_of ) {
$hierarchy = _get_term_hierarchy($taxonomies[0]);
if ( !isset($hierarchy[$child_of]) )
return $empty_array;
}
if ( $parent ) {
$hierarchy = _get_term_hierarchy($taxonomies[0]);
if ( !isset($hierarchy[$parent]) )
return $empty_array;
}
// $args can be whatever, only use the args defined in defaults to compute the key
$filter_key = ( has_filter('list_terms_exclusions') ) ? serialize($GLOBALS['wp_filter']['list_terms_exclusions']) : '';
$key = md5( serialize( compact(array_keys($defaults)) ) . serialize( $taxonomies ) . $filter_key );
$last_changed = wp_cache_get('last_changed', 'terms');
if ( !$last_changed ) {
$last_changed = time();
wp_cache_set('last_changed', $last_changed, 'terms');
}
$cache_key = "get_terms:$key:$last_changed";
$cache = wp_cache_get( $cache_key, 'terms' );
if ( false !== $cache ) {
$cache = apply_filters('get_terms', $cache, $taxonomies, $args);
return $cache;
}
$_orderby = strtolower($orderby);
if ( 'count' == $_orderby )
$orderby = 'tt.count';
else if ( 'name' == $_orderby )
$orderby = 't.name';
else if ( 'slug' == $_orderby )
$orderby = 't.slug';
else if ( 'term_group' == $_orderby )
$orderby = 't.term_group';
elseif ( empty($_orderby) || 'id' == $_orderby )
$orderby = 't.term_id';
$orderby = apply_filters( 'get_terms_orderby', $orderby, $args );
$where = '';
$inclusions = '';
if ( !empty($include) ) {
$exclude = '';
$exclude_tree = '';
$interms = wp_parse_id_list($include);
foreach ( $interms as $interm ) {
if ( empty($inclusions) )
$inclusions = ' AND ( t.term_id = ' . intval($interm) . ' ';
else
$inclusions .= ' OR t.term_id = ' . intval($interm) . ' ';
}
}
if ( !empty($inclusions) )
$inclusions .= ')';
$where .= $inclusions;
$exclusions = '';
if ( !empty( $exclude_tree ) ) {
$excluded_trunks = wp_parse_id_list($exclude_tree);
foreach ( $excluded_trunks as $extrunk ) {
$excluded_children = (array) get_terms($taxonomies[0], array('child_of' => intval($extrunk), 'fields' => 'ids'));
$excluded_children[] = $extrunk;
foreach( $excluded_children as $exterm ) {
if ( empty($exclusions) )
$exclusions = ' AND ( t.term_id <> ' . intval($exterm) . ' ';
else
$exclusions .= ' AND t.term_id <> ' . intval($exterm) . ' ';
}
}
}
if ( !empty($exclude) ) {
$exterms = wp_parse_id_list($exclude);
foreach ( $exterms as $exterm ) {
if ( empty($exclusions) )
$exclusions = ' AND ( t.term_id <> ' . intval($exterm) . ' ';
else
$exclusions .= ' AND t.term_id <> ' . intval($exterm) . ' ';
}
}
if ( !empty($exclusions) )
$exclusions .= ')';
$exclusions = apply_filters('list_terms_exclusions', $exclusions, $args );
$where .= $exclusions;
if ( !empty($slug) ) {
$slug = sanitize_title($slug);
$where .= " AND t.slug = '$slug'";
}
if ( !empty($name__like) )
$where .= " AND t.name LIKE '{$name__like}%'";
if ( '' !== $parent ) {
$parent = (int) $parent;
$where .= " AND tt.parent = '$parent'";
}
if ( $hide_empty && !$hierarchical )
$where .= ' AND tt.count > 0';
// don't limit the query results when we have to descend the family tree
if ( ! empty($number) && ! $hierarchical && empty( $child_of ) && '' === $parent ) {
if ( $offset )
$limit = 'LIMIT ' . $offset . ',' . $number;
else
$limit = 'LIMIT ' . $number;
} else {
$limit = '';
}
if ( !empty($search) ) {
$search = like_escape($search);
$where .= " AND (t.name LIKE '%$search%')";
}
$selects = array();
switch ( $fields ) {
case 'all':
$selects = array('t.*', 'tt.*');
break;
case 'ids':
case 'id=>parent':
$selects = array('t.term_id', 'tt.parent', 'tt.count');
break;
case 'names':
$selects = array('t.term_id', 'tt.parent', 'tt.count', 't.name');
break;
case 'count':
$selects = array('COUNT(*)');
}
$select_this = implode(', ', apply_filters( 'get_terms_fields', $selects, $args ));
$query = "SELECT $select_this FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN ($in_taxonomies) $where ORDER BY $orderby $order $limit";
if ( 'count' == $fields ) {
$term_count = $wpdb->get_var($query);
return $term_count;
}
$terms = $wpdb->get_results($query);
if ( 'all' == $fields ) {
update_term_cache($terms);
}
if ( empty($terms) ) {
wp_cache_add( $cache_key, array(), 'terms' );
$terms = apply_filters('get_terms', array(), $taxonomies, $args);
return $terms;
}
if ( $child_of ) {
$children = _get_term_hierarchy($taxonomies[0]);
if ( ! empty($children) )
$terms = & _get_term_children($child_of, $terms, $taxonomies[0]);
}
// Update term counts to include children.
if ( $pad_counts && 'all' == $fields )
_pad_term_counts($terms, $taxonomies[0]);
// Make sure we show empty categories that have children.
if ( $hierarchical && $hide_empty && is_array($terms) ) {
foreach ( $terms as $k => $term ) {
if ( ! $term->count ) {
$children = _get_term_children($term->term_id, $terms, $taxonomies[0]);
if ( is_array($children) )
foreach ( $children as $child )
if ( $child->count )
continue 2;
// It really is empty
unset($terms[$k]);
}
}
}
reset ( $terms );
$_terms = array();
if ( 'id=>parent' == $fields ) {
while ( $term = array_shift($terms) )
$_terms[$term->term_id] = $term->parent;
$terms = $_terms;
} elseif ( 'ids' == $fields ) {
while ( $term = array_shift($terms) )
$_terms[] = $term->term_id;
$terms = $_terms;
} elseif ( 'names' == $fields ) {
while ( $term = array_shift($terms) )
$_terms[] = $term->name;
$terms = $_terms;
}
if ( 0 < $number && intval(@count($terms)) > $number ) {
$terms = array_slice($terms, $offset, $number);
}
wp_cache_add( $cache_key, $terms, 'terms' );
$terms = apply_filters('get_terms', $terms, $taxonomies, $args);
return $terms;
}
/**
* Check if Term exists.
*
* Returns the index of a defined term, or 0 (false) if the term doesn't exist.
*
* @package WordPress
* @subpackage Taxonomy
* @since 2.3.0
*
* @uses $wpdb
*
* @param int|string $term The term to check
* @param string $taxonomy The taxonomy name to use
* @param int $parent ID of parent term under which to confine the exists search.
* @return mixed Get the term id or Term Object, if exists.
*/
function is_term($term, $taxonomy = '', $parent = 0) {
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( stripslashes( $term ) );
if ( '' === $slug = sanitize_title($term) )
return 0;
$where = 't.slug = %s';
$else_where = 't.name = %s';
$where_fields = array($slug);
$else_where_fields = array($term);
if ( !empty($taxonomy) ) {
$parent = (int) $parent;