public function accessRules()
{
return [['allow', 'roles' => ['admin']], ['allow', 'actions' => ['index']], ['allow', 'actions' => ['error']], ['allow', 'actions' => ['AjaxFileUpload']], ['allow', 'actions' => ['AjaxImageUpload']], ['allow', 'actions' => ['transliterate']], ['deny']];
}