Yii2 layout 由 controller 向layout中传递参数值

Yii2 layout 由 controller 向layout中传递参数值

// controller
    public function actionIndex()
    {
     
        Yii::$app->view->params['model'] = "hello world";

        return $this->render('index');
    }
//layout main.php
$model = $this->params['model'];  获取 hello world