Add-cart.php Num — __top__

// Update cart total if displayed if (document.querySelector('.cart-total')) document.querySelector('.cart-total').textContent = '$' + data.cart_total;

$_SESSION['cart'][$product_id] = $new_qty; else $_SESSION['cart'][$product_id] = $quantity; add-cart.php num

Conclusion A parameter named num on add-cart.php most commonly denotes quantity. Implementing safe, user-friendly cart behavior requires strict validation, server-side authoritative checks for product and pricing, CSRF protections, and clear UX for edge cases like stock limits. The concise PHP example demonstrates basic secure handling: sanitize inputs, check DB for product and stock, update session cart, and return a structured response. // Update cart total if displayed if (document

// Initialize cart if not exists if (!isset($_SESSION['cart'])) $_SESSION['cart'] = []; $_SESSION['cart'][$product_id] = $new_qty