How to pass id to model functions?

Question

Yii

Is it possible to pass id in the model somehow? or not. For example, in the controller, passing id to the getter is acceptable and, accordingly, it happened without errors. I get this error Calling unknown method: app\models\Notification::byIdUser()
Here is the model

public function getByIdUser($id)
    {
        $zakaz = new Zakaz();
        $notification->id_user = $id;
        $notification->name = 'Доставка '.$model->description;
        $notification->id_zakaz = $zakaz->id_zakaz;
    }

In the controller

$notification->byIdUser(7);
$notification->byIdUser(7);

Answer 1

If it is the id of the current user, that is:
But your function returns nothing. It is basically meaningless.