Why is @web not converted to a path?

Question

Yii

I write like this:

<img src="<?= '@web/users/avatars/'.Yii::$app->user->identity['img'];?>" class="user-image" alt="User Image">

output like this:

<img src="web/users/avatars/userimg.png" class="user-image" alt="User Image">

and it should be like this:

<img src="http://site.ru/web/users/avatars/userimg.png" class="user-image" alt="User Image">

What's wrong?!! :-)

Answer 1

\Yii::getAlias('@web')

Answer 2

and, that's it, I understood, I screwed up myself, put Url::to('@web/users/avatars/'.Yii::$app->user->identity['img'], true), it worked, thanks everyone)