prepare("SELECT * FROM users WHERE email = ?"); $stmt->execute([$email]); $user = $stmt->fetch(PDO::FETCH_ASSOC); if ($user && password_verify($password, $user['password'])) { $_SESSION['user_id'] = $user['id']; $_SESSION['user_name'] = $user['name']; $_SESSION['user_role'] = $user['role']; header("Location: index.php"); exit; } else { $error_message = 'Invalid email or password.'; } } catch (PDOException $e) { $error_message = 'Database error: ' . $e->getMessage(); } } } ?>