Add-cart.php Num Work -
When a user clicks "Add to Cart," the system typically sends data to add-cart.php via a POST or GET request. The
RESTful Routing: Instead of add-cart.php?num=123, modern frameworks (like Laravel or Shopify) use clean URLs like POST /cart/add/123. add-cart.php num
In poorly designed systems, additional parameters like &price=0.01 might be accepted by the script. If the script trusts the URL for the price rather than looking it up in the database, a user could effectively "buy" expensive items for pennies. Modern Alternatives: Moving Beyond add-cart.php When a user clicks "Add to Cart," the
If it exists: It updates the existing quantity by adding the new amount (num) to the current total. If the script trusts the URL for the
Security researchers and "bug hunters" look for this specific URL pattern because scripts written in this style are often prone to several classic web vulnerabilities: 1. SQL Injection (SQLi)
// basic validation if ($product_id <= 0 || $num <= 0) http_response_code(400); echo json_encode(['error' => 'Invalid input']); exit;The script typically manages the "Add to Cart" action by performing the following steps:
Update Cart: Check if the product is already in the $_SESSION['cart']. If it exists: Add the new "num" to the existing quantity. If it's new: Initialize it with the provided quantity. Implementation Example Here is a secure implementation using PHP sessions:
