Wie kann ich die Warenkorb-Logik erweitern??
Der Warenkorb überschreibt aktuell die vorhandene Menge, wenn ein Produkt erneut hinzugefügt wird. Wie könnte ich ? <?php session_start(); include 'db.php'; // Check if a product_id is set in the URL if (isset($_GET['id_product'])) { $id_product = $_GET['id_product']; // Prepare and execute query to fetch product details $stmt = $conn->prepare("SELECT * FROM products WHERE id_product = ?"); $stmt->bind_param("i",$id_product); $stmt->execute(); $result = $stmt->get_result(); $product = $result->fetch_assoc(); // If product not found, redirect to the main page if (!$product) { header("Location: index.php"); exit(); } } else { header("Location: index.php"); exit(); } // Handle the add to cart functionality if ($_SERVER['REQUEST_METHOD'] === 'POST') { $quantity = isset($_POST['anzahl']) ? (int)$_POST['anzahl'] : 1; // Ensure a valid quantity is added if ($quantity > 0) { // Add to cart (store in session) $_SESSION['cart'][$id_product] = [ 'product_name' => $product['produktname'], 'price' => $product['preis_pro_prod'], 'quantity' => $quantity, 'pid' => $id_product ]; // Redirect to the cart page or display success message header(header: "Location: cart.php"); exit(); } } ?> <!DOCTYPE html> <html> <head> <title><?= htmlspecialchars($product['product_name']) ?> - Product Details</title> <style> body { font-family: Arial, sans-serif; background-color: #f4f4f9; display: flex; flex-direction: column; align-items: center; padding: 20px; } .product-detail { background-color: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1); padding: 20px; max-width: 500px; text-align: center; } .product-detail img { width: 100%; height: auto; border-radius: 8px; margin-bottom: 20px; } .product-detail h2 { color: #333; margin-bottom: 10px; } .product-detail p { color: #666; margin-bottom: 10px; } .product-detail .price { font-weight: bold; color: #2a9d8f; font-size: 1.2em; margin-top: 10px; } .addtocart { color:#2a9d8f; background-color: white; border-color:#2a9d8f ; border-width: 2px; font-weight: bold; } .anzahl { background-color: white; border-color:#2a9d8f ; color:#2a9d8f; border-width: 2px; font-weight: bold; text-align: center; } </style> </head> <body> <div class="product-detail"> <img src="<?= htmlspecialchars($product['image_url']) ?>" alt="<?= htmlspecialchars($product['produktname']) ?>"> <h2><?= htmlspecialchars($product['produktname']) ?></h2> <p><?= htmlspecialchars($product['produktbeschreibung']) ?></p> <p class="price">Price: €<?= htmlspecialchars($product['preis_pro_prod']) ?></p> <form method="post"> <input type="number" name="anzahl" value="1" min="1" placeholder="Anzahl" class="anzahl"> <br> <br> <button type="submit" class="addtocart">In den Warenkorb</button> </form> </div> </body> </html>
