if (isset($_SESSION['cart'][$medicine_id])) $_SESSION['cart'][$medicine_id] += $quantity; else $_SESSION['cart'][$medicine_id] = $quantity;
Cart persistence across login/logout Solution: Merge session cart into database cart when user logs in. Conclusion This Online Pharmacy Management System covers core e-commerce functionality tailored for pharmaceutical needs. The complete source code can be built in 2-3 weeks by a mid-level PHP developer. For production, add HTTPS, implement proper logging, and comply with local pharmaceutical regulations (preservation of prescription records, data retention policies). online pharmacy management system project in php
$sql = "INSERT INTO cart (user_id, medicine_id, quantity) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE quantity = quantity + ?"; $stmt = $pdo->prepare($sql); $stmt->execute([$user_id, $medicine_id, $quantity, $quantity]); else $_SESSION['cart'][$medicine_id] = $quantity
