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