How to add 301 redirect to https for Yii2 without .htaccess

I’ve tested different redirect options for .htaccess, but sites keep giving “redirected you too many times” error. Here is the working code to solve the problem.

In the file /config/web.php you need to find:

'bootstrap' => [
		'log',
		'app\components\Bootstrap',
	],

and place below:

'on beforeRequest' => function ($event) {
       if(!Yii::$app->request->isSecureConnection){
           $url = Yii::$app->request->getAbsoluteUrl();
           $url = str_replace('http:', 'https:', $url);
           Yii::$app->getResponse()->redirect($url);
           Yii::$app->end();
       }
},