For the cart functionality, you'll need to manage user sessions to store cart items. Make sure session is started:
The primary goal of an "Add to Cart" script is to capture a product's unique ID and store it in a persistent session so the user can continue shopping. Session Management session_start() addcartphp num high quality
// --- HIGH QUALITY VALIDATION BLOCK --- if (!$product_id || $product_id <= 0) die(json_encode(['error' => 'Invalid product ID'])); For the cart functionality, you'll need to manage
Maintain a running total variable as you loop through the items. 4. Advanced Features for High Quality For the cart functionality
High-quality development isn't just about the back-end; it's about how the user interacts with your gallery.
Focus on the Elias uses to build the site.
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