yii对cookie的操作常见的主要有以下几种：
1.设置cookie:
$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;
2.读取cookie:
$cookie = Yii::app()->request->getCookies(); echo $cookie['mycookie']->value;
3.销毁cookie:
$cookie = Yii::app()->request->getCookies(); unset($cookie[$name]);