Code-Snippets-Functions/Execute a function on a child site/WooCommerce/disable-gateway-by-product-ids.txt

add_filter('woocommerce_available_payment_gateways', 'wc_payment_methods_by_product_ids');

function wc_payment_methods_by_product_ids($gateways) {

    // do nothing in /wp-admin
    if (is_admin()) {
        return $gateways;
    }

    // Add product IDs you would like to unset payment gateways for
    $product_ids = array(
        2422,
        2423,
        2424,
        2425
    );

    $cod_product_ids = array(3197);
    // do nothing on "Pay for order" page
    if (is_wc_endpoint_url('order-pay')) {
        return $gateways;
    }

    foreach (WC()->cart->get_cart_contents() as $key => $cart_item) {
        // count number of items if needed (optional) 
        if (in_array($cart_item['data']->get_id(), $product_ids)) {
            if (isset($gateways['stripe'])) {
                unset($gateways['stripe']);
                break; // exit the loop if the specific product is found
            }
        }
        if (in_array($cart_item['data']->get_id(), $cod_product_ids)) {
            if (isset($gateways['cod'])) {
                unset($gateways['cod']);
            }
            if (isset($gateways['bacs'])) {
                unset($gateways['bacs']);
            }
        }
    }

    return $gateways;
}