Edit/change Param In Yii::app()->Getrequest()->Geturlreferrer()

hi guys, how to edit/change the param in Yii::app()->getRequest()->getUrlReferrer() or Yii::app()->user->returnUrl

i tried the coding below but not working, it generated redundant url:

$this->redirect(array(Yii::app()->getRequest()->getUrlReferrer(), ‘someparam’=>‘someval’))

you can try this


Yii::app()->getController()->redirect(array(Yii::app()->getRequest()->getUrlReferrer(), 'someparam'=>'someval'));