Then she added a second line, for herself, in a private note:
<?php // Validate product ID $productId = filter_input(INPUT_POST, 'product_id', FILTER_VALIDATE_INT); if (!$productId || $productId <= 0) die(json_encode(['error' => 'Invalid product ID']));
By choosing Addcartphp as their e-commerce solution, businesses can enjoy a range of benefits, including:
Add to Cart document.querySelectorAll('.add-to-cart-btn').forEach(button => button.addEventListener('click', function() const productId = this.getAttribute('data-id'); const formData = new FormData(); formData.append('product_id', productId); formData.append('quantity', 1); fetch('add_cart.php', method: 'POST', body: formData ) .then(response => response.json()) .then(data => if(data.success) alert(data.message); // Replace with a sleek toast notification else alert('Error: ' + data.message); ) .catch(error => console.error('Error:', error)); ); ); Use code with caution. 6. Security and Optimisation Checklist addcartphp num high quality
return ['status' => 'success', 'message' => 'Product added to cart!', 'cart_count' => count($_SESSION['cart'])];
return ['success' => true, 'quantity' => $newQuantity];
CREATE TABLE cart_items ( id INT AUTO_INCREMENT PRIMARY KEY, user_id INT NOT NULL, product_id INT NOT NULL, quantity INT NOT NULL CHECK (quantity > 0), added_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, UNIQUE KEY (user_id, product_id) ); Then she added a second line, for herself,
false, 'message' => 'Method Not Allowed']); exit; // 1. CSRF Token Verification session_start(); $token = $_POST['csrf_token'] ?? ''; if (!$token || $token !== ($_SESSION['csrf_token'] ?? '')) http_response_code(403); echo json_encode(['success' => false, 'message' => 'Invalid CSRF token']); exit; // 2. Input Sanitization $productId = filter_input(INPUT_POST, 'product_id', FILTER_VALIDATE_INT); $quantity = filter_input(INPUT_POST, 'quantity', FILTER_VALIDATE_INT); if (!$productId || !$quantity || $quantity <= 0) http_response_code(400); echo json_encode(['success' => false, 'message' => 'Invalid product ID or quantity']); exit; // 3. Database Mocking (Replace with actual PDO database query) // SELECT id, name, price, stock FROM products WHERE id = :id $pdoMockProduct = [ 'id' => $productId, 'name' => 'Premium PHP Framework Guide', 'price' => 49.99, 'stock' => 10 // Mocked maximum stock limit ]; // Instantiate the product from verified database data $product = new Product( $pdoMockProduct['id'], $pdoMockProduct['name'], $pdoMockProduct['price'], $pdoMockProduct['stock'] ); // 4. Processing via ShoppingCart Class $cart = new ShoppingCart(); $isAdded = $cart->add($product, $quantity); if ($isAdded) echo json_encode([ 'success' => true, 'message' => 'Product successfully added to your cart.', 'cart_count' => array_sum($cart->getItems()) ]); else http_response_code(400); echo json_encode([ 'success' => false, 'message' => 'Could not add item. Check available stock limits.' ]); Use code with caution. The Frontend Implementation (Asynchronous AJAX API Call)
A hidden risk: malicious sites tricking users into adding items. High-quality scripts include a CSRF token.
The num (or quantity) parameter determines how many units of a product a user intends to purchase. High-quality handling of this parameter involves: $product = $stmt->
// Quantity validation: ensure num is between 1 and a reasonable max (e.g., 999) if ($requested_num === false || $requested_num === null) $requested_num = 1; // default
Achieving High-Quality E-Commerce with "addcartphp num" Solutions
// 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);