Add-cart.php Num [FAST]

Modern web development has moved away from this pattern in favor of more secure and user-friendly methods:

Redirects the user back to the shopping page or the checkout. The Cybersecurity Context: Why it’s a "Dork" add-cart.php num

An attacker can send: add-cart.php?id=105&num=1 UNION SELECT password FROM admin_users -- Modern web development has moved away from this

if (!$product_id || !$quantity) http_response_code(400); die('Invalid request'); $sql = "INSERT INTO cart_items (user_id

else showNotification(data.error, 'error');

try // Begin Transaction for data integrity $pdo->beginTransaction(); // The Query // This attempts to insert the row. // If the user_id + product_id combo already exists, it updates the quantity instead. $sql = "INSERT INTO cart_items (user_id, product_id, quantity) VALUES (:user_id, :product_id, 1) ON DUPLICATE KEY UPDATE quantity = quantity + 1";

: It creates a new entry in the session array with the product's details. Technical Implementation Approaches