如何在布局中访问会话变量

In the controller of login(actionLogin) i have created session & on successful login i have set session variables & rendered the page dashboard.

In the dashboard i have tried echoing that session variable in the layout of main.php which is my menubar.

<?php echo $session['name']; ?>

I have opened the session in the menubar as

<body>
<?php $this->beginBody() ?>
<?php $session->open();?>

it is showing me error that calling to non-object method open.

I have also added use yii\web\session on the top.

How to access the session in the layout

You should simply use :

<?php echo Yii::$app->session['name']; ?>