I want to add products to the shopping cart in PHP - Stack Overflow
While num usually refers to quantity, sometimes vulnerabilities in add-cart.php allow the user to modify the price parameter alongside the quantity.
Developers must stop trusting user input. Every variable, including num , must be validated. Use filter_input to ensure num is a positive integer. add-cart.php num
Demystifying add-cart.php?num=X : How to Build and Secure a PHP Shopping Cart Backend
For logged-in users, consider syncing the session cart with a database table so their num choices persist across devices. Conclusion I want to add products to the shopping
: Ensure the product exists in your database and that the requested quantity is a positive integer.
Use code with caution. 3. Best Practices for add-cart.php num Use filter_input to ensure num is a positive integer
"Your code is vulnerable to SQL injection via the $category variable which is user supplied ($_POST['category']) and then put into the query."