yii2 get username of logged in user

Use following code get the username of the currently logged in user :

<?= \Yii::$app->user->identity->username ?>

YII2 redirect to previous page or referrer

YII2 redirect to previous page or referrer $this -> redirect ( Yii :: $app -> request -> referrer );

Yii, return to previous url after login or logout

If you want to return to your previous url after login or logout try this : <?php $this -> redirect (Yii :: app () -> request -> urlReferrer ); ?> To set the return url to be the url that was before the login page or registeration page was called you can put following code in views/layouts/main.php file : <?php //this checks id the controller action is not 'login' then it keeps the current url in returnUrl if (CController :: getAction () -> id != 'login' ) { Yii :: app () -> user -> setReturnUrl (Yii :: app () -> request -> getUrl ()); } ?>

yii, Executing a SQL without calling a Model

yii, Executing a SQL without calling a Model <? $connection = Yii :: app () -> db ; $sql = "SELECT id,username FROM users" ; $command = $connection -> createCommand ( $sql ); $dataReader = $command -> query (); $rows = $dataReader -> readAll (); print_r ( $rows ); ?>

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