osCommerce / oscommerce2

        $this->ignored_actions[] = session_name();

// create the shopping cart

        if (!isset($_SESSION['cart']) || !is_object($_SESSION['cart']) || (get_class($_SESSION['cart']) != 'shoppingCart')) {

            $_SESSION['cart'] = new \shoppingCart();

        }

// include currencies class and create an instance

        $currencies = new \currencies();

        }

// navigation history

        if (!isset($_SESSION['navigation']) || !is_object($_SESSION['navigation']) || (get_class($_SESSION['navigation']) != 'navigationHistory')) {

            $_SESSION['navigation'] = new \navigationHistory();

        }

        $_SESSION['navigation']->add_current_page();