Add-cart.php Num 'link' Jun 2026

if ($_SERVER['REQUEST_METHOD'] !== 'POST') http_response_code(405); die("Method not allowed");

fetch('add-cart.php', method: 'POST', headers: 'Content-Type': 'application/x-www-form-urlencoded', body: `product_id=123&num=$quantity` ) add-cart.php num

Example PHP implementation (concise)

Many developers check if num is numeric but forget to check if it’s positive. if ($_SERVER['REQUEST_METHOD']

When a customer clicks "Add to Cart" on a product gallery , the following steps occur: Shopping Cart using PHP and MySQL- Updating Quantity #40 die("Method not allowed")

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