<?php session_start(); require 'conf.php'; $co = new Paydunya_Checkout_Invoice(); $total_amount = 0; foreach ($_SESSION["cart"] as $product) { $co->addItem($product['name'], $product['quantity'], $product['unit_price'], $product['total_price']); $total_amount += $product['total_price']; } $co->setTotalAmount($total_amount); if ($co->create()) { header("Location: " . $co->getInvoiceUrl()); } else { echo $co->response_text; }