$cookie = new CHttpCookie('mycookie','this is my cookie');
$cookie->expire = time()+60*60*24*30;  //有限期30天
Yii::app()->request->cookies['mycookie']=$cookie;
读取cookie:
 
$cookie = Yii::app()->request->getCookies();
echo $cookie['mycookie']->value;
销毁cookie:
 
$cookie = Yii::app()->request->getCookies();
unset($cookie[$name]);