Private Access Private Access

This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

Summery Summery

Retrieves children of taxonomy as Term IDs.

Syntax Syntax

_get_term_hierarchy( string $taxonomy )

Parameters Parameters


(Required) Taxonomy name.

Return Return

(array) Empty if $taxonomy isn't hierarchical or returns children as Term IDs.

Source Source

File: wp-includes/taxonomy.php


	return $terms;

 * Updates the cache for the given term object ID(s).
 * Note: Due to performance concerns, great care should be taken to only update
 * term caches when necessary. Processing time can increase exponentially depending
 * on both the number of passed term IDs and the number of taxonomies those terms
 * belong to.
 * Caches will only be updated for terms not already cached.
 * @since 2.3.0
 * @param string|int[]    $object_ids  Comma-separated list or array of term object IDs.
 * @param string|string[] $object_type The taxonomy object type or array of the same.
 * @return void|false False if all of the terms in `$object_ids` are already cached.
function update_object_term_cache( $object_ids, $object_type ) {
	if ( empty( $object_ids ) ) {

	if ( ! is_array( $object_ids ) ) {
		$object_ids = explode( ',', $object_ids );


Changelog Changelog

Version Description
2.3.0 Introduced.


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