When moving from development to a live production environment, audit your implementation against the following security vectors:
if (isset($this->items[$key])) $this->items[$key]['quantity'] += $quantity; else $this->items[$key] = [ 'product_id' => $productId, 'quantity' => $quantity, 'options' => $options, 'price' => $product['price'] ]; addcartphp num high quality
Run session_regenerate_id(true) periodically (e.g., during login state changes) to protect the active cart session state. When moving from development to a live production
Do you need assistance integrating this system with a database engine like ? items[$key]['quantity'] += $quantity
The best practice is to check if a product already exists in the cart. If it does, increment its quantity; otherwise, add it as a new entry. Using the product ID as the array key makes updates highly efficient.
Before writing code, understand what a premium "add to cart" operation entails.