Add-cart.php Num Work Guide

// 4. Update cart session if (!isset($_SESSION['cart'])) $_SESSION['cart'] = [];

The num parameter (often named qty , quantity , or count ) tells the backend how many units of a product to place into the session array. add-cart.php num

When a user clicks a "Buy" or "Add to Cart" button, the browser sends a request to the server, often looking like this: ://example.com Common Internal Logic The script generally follows these steps: Receive Parameter : It captures the product ID (e.g., $_GET['num'] $_POST['num'] Database Check : It queries the database (like tblproduct ) to verify the item exists and fetch its price and name. Session Management : It stores the item details in a $_SESSION['cart_item'] Session Management : It stores the item details

: Sends the user back to the product page or the cart view, often using a header redirect or a JSON response if using AJAX. Common Code Structure The num parameter (often named qty