get_objects_in_term() – Retrieve object_ids of valid taxonomy and term.
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Description
Retrieves 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 a WP_Error.
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 are returned by using $args
with either ASC or DESC array. The value should be in the key named 'order'.
Usage
$string[]|WP_Error = get_objects_in_term( $term_ids, $taxonomies, $args );
Parameters
- $term_ids
- ( int|int[] ) required – Term ID or array of term IDs of terms that will be used.
- $taxonomies
- ( string|string[] ) required – String of taxonomy name or Array of string values of taxonomy names.
- $args
- ( array|string ) optional – Change the order of the object IDs, either ASC or DESC.
Returns
string[]|WP_Error An array of object IDs as numeric strings on success, WP_Error if the taxonomy does not exist.
Source
File name: wordpress/wp-includes/taxonomy.php
Lines:
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; }