protected function saveToFile($data, $file)
{
    **file_put_contents($file, "<?phpnreturn " . VarDumper::export($data) . ";n", LOCK_EX);
    $this->invalidateScriptCache($file);**
}

public function actionRole()
{
    $admin = Yii::$app->authManager->createRole('admin');
    $admin->description = 'Admin Utama';
    Yii::$app->authManager->add($admin);

    $user = Yii::$app->authManager->createRole('author');
    $user->description = 'Admin ke 2';
    Yii::$app->authManager->add($user);

    return 12345;
}