WordPress WooCommerce Random Product

sm_wc_random_product.php

<?php
/**
 * @author Muhamad Sulaiman
 * @link https://github.com/msulaimanmisri
 */

function sm_wc_random_products( $args ) {
	$orderby_value = isset( $_GET['orderby'] ) ? woocommerce_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;
}
 
function sm_wc_random_product_catalog( $sortby ) {
	$sortby['random_list'] = 'Random';
	return $sortby;
}

add_filter( 'woocommerce_get_catalog_ordering_args', 'sm_wc_random_products' );
add_filter( 'woocommerce_default_catalog_orderby_options', 'sm_wc_random_product_catalog' );
add_filter( 'woocommerce_catalog_orderby', 'sm_wc_random_product_catalog' );