Add-cart.php Num Upd Jun 2026

Prevents session fixation when adding items to cart.

This article dissects the add-cart.php script, focusing specifically on the num parameter. We will explore what it does, why it’s a red flag for security, how attackers exploit it, and how to rebuild it correctly.

While num implies an integer, the HTTP protocol does not enforce data types. An attacker can send: add-cart.php?id=200&num=1.9999 add-cart.php num

: Mask explicit PHP scripts by using an .htaccess file or Nginx rewrite rules to convert add-cart.php?num=123 into a cleaner RESTful route like /cart/add/123 .

if (!$product) die('Product not found'); Prevents session fixation when adding items to cart

// Example of how the server captures the parameter $product_id = $_GET['num']; Use code with caution.

Always update to the latest version, ensure register_globals is disabled on the server, and input-sanitize all user-supplied parameters. While num implies an integer, the HTTP protocol

Because num directly affects order totals and inventory, .

If you are developing or auditing a store system, let me know: