How to correctly write a regular expression in the urlmanager yii2 rules settings?

Question

Yii

Hello, there is such a rule: It is
'//<city>.domen.ru/search' => 'search/index',
necessary that city is not substituted if it is equal to moscow
I did this:

'//<city:^(?!moscow).*?>.domen.ru/search' => 'search/index',

Works but stops working Yii::$app->request->get('city').

Answer 1

config:

'//<city>.domen.ru/search' => 'search/index',
'//domen.ru/search' => 'search/index',

controller

public function actionIndex($city='без поддомена'){
 return $city;
}