metadata_exists( string $meta_type, int $object_id, string $meta_key ): bool

763function metadata_exists( $meta_type, $object_id, $meta_key ) {764	if ( ! $meta_type || ! is_numeric( $object_id ) ) {765		return false;766	}767 768	$object_id = absint( $object_id );769	if ( ! $object_id ) {770		return false;771	}772 773	/** This filter is documented in wp-includes/meta.php */774	$check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, true, $meta_type );775	if ( null !== $check ) {776		return (bool) $check;777	}778 779	$meta_cache = wp_cache_get( $object_id, $meta_type . '_meta' );780 781	if ( ! $meta_cache ) {782		$meta_cache = update_meta_cache( $meta_type, array( $object_id ) );783		$meta_cache = $meta_cache[ $object_id ];784	}785 786	if ( isset( $meta_cache[ $meta_key ] ) ) {787		return true;788	}789 790	return false;791}