Num | Add-cart.php

Never trust the client to tell you the price. When add-cart.php receives a request, it should ignore any price sent by the frontend. Instead, it should:

SELECT stock, price, status FROM products WHERE id = ? add-cart.php num

This article provides a deep dive into implementing, securing, and optimizing the add-cart.php num system. 1. What is add-cart.php num ? Never trust the client to tell you the price

At first glance, a URL like https://www.yourstore.com/add-cart.php?id=105&num=1 seems harmless. It tells the server: "Add product ID 105 to the cart, quantity 1 (num=1)." This article provides a deep dive into implementing,

At its core, the add-cart.php file accepts two critical pieces of information:

An attacker should not be able to call add-cart.php 1000 times per second. Implement a token bucket or store a timestamp in the session:

The num parameter is often passed via a GET or POST request (e.g., add-cart.php?num=101 ).