add_term_meta() WordPress Function

The add_term_meta() function allows you to add meta data to a term. This is useful for storing extra data related to a term, such as a custom field. The first parameter is the term ID, and the second parameter is the meta key. The third parameter is the meta value, which can be either a string or an array.

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

function add_term_meta( $term_id, $meta_key, $meta_value, $unique = 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 );
	}

	return add_metadata( 'term', $term_id, $meta_key, $meta_value, $unique );
}