joom 0 Report post Posted June 16, 2013 Hello, I get the following error after clicking on the add to cart link in ch5: Fatal error: Unsupported operand types in C:\Program Files (x86)\EasyPHP-5.3.8.1\www\\Ch05\cart.php on line 127 The line is: $subtotal = $_SESSION['cart'][$row['sw_id']] * $price; What is the problem? Thanks Quote Share this post Link to post Share on other sites
margaux 171 Report post Posted June 16, 2013 use var_dump on the variables to ensure both are of type integer. You may need to typecast one or both of them. int($_SESSION['cart'][$row['sw_id']]) 1 Quote Share this post Link to post Share on other sites
