What is the best way to display a widget with parameters from the controller in the layout?

Question

Yii

The task is to display the widget in the layout with type parameters: region, etc., these parameters are obtained in the controller action, how best to transfer from the controller to the layout?
ps in Yii 1 (it wasn't exactly MVC), this task was solved by defining a controller property, and since $this in view and layout pointed to the controller, then the parameter to get was of the type: $this->param. What is the right way to approach now?

Answer 1

How to pass param from controller to layout in YII2
Controller:
Views + Layout:

/* @var $this yii\web\View */
echo $this->params['customParam'];