商品已在購物車內 "); } } $_SESSION['Cart'][] = $_POST['P_Index']; // 產品主鍵 $_SESSION['Name'][] = $_POST['P_Name']; // 產品主鍵 $_SESSION['Price'][] = $_POST['P_Price']; // 產品主鍵 $_SESSION['Quantity'][] = 1; // 產品主鍵 header("Location:showcart.php"); ?>