yii Create Url, Links and Redirections

Create URL:

 $url = Yii::app()->createUrl('site/index');
$url = Yii::app()->createUrl('site/index', array('id'=>100));

Create absolute URL:

 Yii::app()->createAbsoluteUrl('site/index',array('id'=>100)); 

Create Link

 echo CHtml::link('text', array('site/index', 'id'=>100)); 

Redirect Browser

 $this->redirect(array('site/index','id'=>100));