If it does, it increments the existing quantity by the value of num .
Elias squinted. The num parameter was supposed to represent the quantity of items a user added to their basket. The frontend had validation to prevent negative numbers. The backend had a sanitization script. Yet, there it was: a request for antique brass clocks. add-cart.php num
In poorly architected legacy systems or beginner PHP projects, add-cart.php acts as a direct gateway to the cart session. The num parameter typically represents one of two things: If it does, it increments the existing quantity
INSERT INTO cart (user_id, product_id, quantity) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE quantity = quantity + VALUES(quantity); If it does
// Redirect user back to cart or product page header("Location: cart.php?success=added"); exit();
<?php session_start();