Addcartphp Num High Quality «Real»

echo json_encode([ 'success' => true, 'cart_count' => array_sum(array_column($_SESSION['cart'], 'quantity')), 'message' => "Added $num item(s) to cart." ]); 3.1. CSRF Protection on Add-to-Cart A hidden risk: malicious sites tricking users into adding items. High-quality scripts include a CSRF token.

// Assuming $pdo is your database connection $stmt = $pdo->prepare("SELECT id, name, price, stock_quantity FROM products WHERE id = ? AND status = 'active'"); $stmt->execute([$product_id]); $product = $stmt->fetch(PDO::FETCH_ASSOC); if (!$product) die(json_encode(['error' => 'Product not found'])); addcartphp num high quality

// Re-check stock against new total if ($new_quantity > $product['stock_quantity']) die(json_encode(['error' => 'Cannot add. Total would exceed stock.'])); // Assuming $pdo is your database connection $stmt

A high-quality backend needs an equally robust frontend. Use JavaScript to enforce numeric integrity before the request reaches addcartphp . Use JavaScript to enforce numeric integrity before the

$_POST['num'] = 'abc'; include 'add_to_cart.php'; $this->expectOutputRegex('/Invalid quantity/');

if ($num < 1) http_response_code(400); die(json_encode(['error' => 'Quantity must be at least 1']));

// Optionally enforce precision $num = round($num, 2); // e.g., 1.25 kg Protect your server from rapid addcartphp spam: