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

767function metadata_exists( $meta_type, $object_id, $meta_key ) {768	if ( ! $meta_type || ! is_numeric( $object_id ) ) {769		return false;770	}771 772	$object_id = absint( $object_id );773	if ( ! $object_id ) {774		return false;775	}776 777	/** This filter is documented in wp-includes/meta.php */778	$check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, true, $meta_type );779	if ( null !== $check ) {780		return (bool) $check;781	}782 783	$meta_cache = wp_cache_get( $object_id, $meta_type . '_meta' );784 785	if ( ! $meta_cache ) {786		$meta_cache = update_meta_cache( $meta_type, array( $object_id ) );787		$meta_cache = $meta_cache[ $object_id ];788	}789 790	if ( isset( $meta_cache[ $meta_key ] ) ) {791		return true;792	}793 794	return false;795}