Code-Snippets-Functions/Execute a function on a child site/WooCommerce/display-products-randomly-by-default-on-shop-page.txt

add_action( 'pre_get_posts', 'shop_default_orderby_rand' );
function shop_default_orderby_rand( $query ) {
    if ( is_shop() && ( ! isset($_GET['orderby']) || 'menu_order' === $_GET['orderby'] ) ) {
        $query->set( 'orderby', 'rand' );
    }
}