What is the correct way to place one form on all pages in YII 2?

Question

Yii

There was a problem, it is necessary to place the form adding a text line on all pages. But the form requires a model, and in order to place it in the layout it was necessary to add a crutch, tell me how to do it right.

<? if (!$model) {
        $model = new \app\models\Name();
        $form = ActiveForm::begin(['action' => '/name/search/']);
    } else {
        $form = ActiveForm::begin();
    }

Answer 1

It makes no sense to use ActiveForm for such a simple one-field form. Then the model is not needed.

Answer 2

Make a widget