prepare("SELECT * FROM users WHERE username = :username"); $stmt->bindParam(':username', $username); $stmt->execute(); $user = $stmt->fetch(); if ($user && password_verify($password, $user['password'])) { // Password is correct, start session $_SESSION['user_id'] = $user['id']; $_SESSION['username'] = $user['username']; $_SESSION['user_role'] = $user['role']; // Redirect to admin dashboard header('Location: admin/index.php'); exit; } else { $error_message = 'Invalid username or password.'; } } catch (PDOException $e) { $error_message = 'Database error: ' . $e->getMessage(); } } } ?>