Tùy chọn sắp xếp tùy chỉnh (tăng/giảm)

	/**
	* Thêm tùy chọn sắp xếp tùy chỉnh (tăng/giảm)
	*/
	add_filter( ‘woocommerce_get_catalog_ordering_args’, ‘custom_woocommerce_get_catalog_ordering_args’ );
	function custom_woocommerce_get_catalog_ordering_args( $args ) {
	$orderby_value = isset( $_GET[‘orderby’] ) ? wc_clean( $_GET[‘orderby’] ) : apply_filters( ‘woocommerce_default_catalog_orderby’, get_option( ‘woocommerce_default_catalog_orderby’ ) );
	if ( ‘random_list’ == $orderby_value ) {
	$args[‘orderby’] = ‘rand’;
	$args[‘order’] = ”;
	$args[‘meta_key’] = ”;
	}
	return $args;
	}
	add_filter( ‘woocommerce_default_catalog_orderby_options’, ‘custom_woocommerce_catalog_orderby’ );
	add_filter( ‘woocommerce_catalog_orderby’, ‘custom_woocommerce_catalog_orderby’ );
	function custom_woocommerce_catalog_orderby( $sortby ) {
	$sortby[‘random_list’] = ‘Ngẫu nhiên’;
	return $sortby;
	}