question about cookies

dont underststand what matter:

class CartController extends Controller

{

…

public function actionEnterdata2()

{


  // block 1 begin


   $cookies6 = Yii::$app->request->cookies; 


   $language = $cookies6->getValue('language', 'en');


   echo "----"; echo $language; echo "----";


 // block 1 end





 // block 2 begin


   $cookies5 = Yii::$app->response->cookies;


   $cookies5->add(new \yii\web\Cookie([


      'name' => 'language',


      'value' => 'engeng',


     ]));   


 //block 2 end

return $this->render (enterdata) ;

}

…

}

localhost/shop/basic/web/index.php?r=cart%2Fenterdata2

i cant set cookie. string: echo "----"; echo $language; echo "----"; show me previously set value no matter how many times i reload page. But when i delete block1 , then reload, then return back block1, then reload - all right. i see wanted value. Why so?

by testing i was understand, that if i delete "echo" in action of controller and see result by render view, then all good.