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get_term_children › WordPress Function

Since2.3.0
Deprecatedn/a
› get_term_children ( $term_id, $taxonomy )
Parameters: (2)
  • (int) $term_id ID of term to get children.
    Required: Yes
  • (string) $taxonomy Taxonomy name.
    Required: Yes
Returns:
  • (array|WP_Error) List of term IDs. WP_Error returned if `$taxonomy` does not exist.
Defined at:
Codex:

Merges 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.


Related Functions: _get_term_children, get_category_children, get_children, get_page_children, get_term_field

Source 

function get_term_children( $term_id, $taxonomy ) {
	if ( ! taxonomy_exists( $taxonomy ) ) {
		return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
	}

	$term_id = (int) $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;
}