if (array_key_exists('quantity', $this->m_request)) {
                        $quantity = $this->m_request['quantity'];
                        print_r ($quantity);

                        foreach ($quantity as $value) {

                                echo "Product_ID $value has the value " . $quantity[$value] . "<br>";

                        }

        }


/* Error:
Notice: Undefined index: 444 in CartView.php on line 110