YII2 development of reference

A parameter acquisition

use Yii;
Yii::$app->params['params'];

Two settings page title

$this->getView()->title = "page title";

Three controller-related

　3.1 Get the current controller

$controllerID = Yii::$app->controller->id;

  3.2 Get the current action

$actionID = Yii::$app->controller->action->id;