Add-cart.php Num Verified -

if (!$product_id || !$quantity) http_response_code(400); die('Invalid request');

The fluorescent lights of the QA lab hummed at a frequency that usually gave Elias a headache, but tonight, the silence of the empty office was louder. It was 2:00 AM. He was staring at a line of logs that shouldn’t exist. POST /checkout/add-cart.php?item_id=9021&num=-1 add-cart.php num

This code is a disaster waiting to happen. It trusts user input implicitly, has no CSRF protection, no inventory check, and no ownership validation. if (!$product_id || !$quantity) http_response_code(400)

: Many systems default this to 1 if no value is provided. has no CSRF protection