Code-Snippets-Functions/Execute a function on a child site/WooCommerce/change-payment-method-title-for-specific-products.txt

add_filter( 'woocommerce_gateway_title', 'change_payment_gateway_title', 100, 2 );
function change_payment_gateway_title( $title, $payment_id ){
    $targeted_payment_id  = 'redsys_gw'; // Set your payment method ID
    $targeted_product_ids = array(37, 53); // Set your product Ids

    // Only on checkout page for specific payment method Id
    if( is_checkout() && ! is_wc_endpoint_url() && $payment_id === $targeted_payment_id ) {
        // Loop through cart items
        foreach( WC()->cart->get_cart() as $item ) {
            // Check for specific products: Change payment method title
            if( in_array( $item['product_id'], $targeted_product_ids ) ) {
                return __("Payment in installments", "woocommerce");
            }
        }
    }
  return $title;
}