WordPress WooCommerce

WooCommerce Allow Only One Product In Cart

19 October 2021
* @snippet WooCommerce - allow only one product in cart
* @author Prosvit Design Team
* @website https://prosvit.design
add_filter( 'woocommerce_add_to_cart_validation', 'prosvit_woocommerce_add_to_cart_validation', 99, 2 );
function prosvit_woocommerce_add_to_cart_validation( $passed, $added_product_id ) {
// Products ids that will trigger this behaviour
$products = array(1, 2, 3);
if ( in_array( $added_product_id, $products ) ) {
return $passed;

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