add_term_meta( int $term_id, string $meta_key, mixed $meta_value, bool $unique = false )

Adds metadata to a term.



(Required) Term ID.


(Required) Metadata name.


(Required) Metadata value.


(Optional) Whether to bail if an entry with the same key is found for the term.

Default value: false


(int|WP_Error|bool) Meta ID on success. WP_Error when term_id is ambiguous between taxonomies. False on failure.


File: wp-includes/taxonomy.php

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;


Version Description
WP-4.4.0 Introduced.