'/']); session_start(); $error = null; if ($_SERVER['REQUEST_METHOD'] === 'POST') { $username = $_POST['username'] ?? ''; $password = $_POST['password'] ?? ''; // Dummy authentication if ($username === 'admin' && $password === 'password') { $_SESSION['user'] = ['name' => 'Admin']; header('Location: index.php'); exit; } else { $error = 'Invalid username or password'; } } ?> Login

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