Home page url in yii

Here i added the code to "how to set and get the home page url in yii"

Set Home Page Url

 ...............
 'homeUrl'=>array('user/index'),
 'components'=>array(
  ...............
  ),
 ...............

Get Home Page Url

 $homeurl=Yii::app()->homeUrl;
 //redirect home page
 Yii::app()->request->redirect(Yii::app()->homeUrl);