O Guia Definitivo do Yii 1.1

class UserIdentity extends CUserIdentity
{
private $_id;
public function authenticate()
{
$record=User::model()->findByAttributes(array(
'username'=>$this->username
));
if($record===null)
$this->errorCode=self::ERROR_USERNAME_INVALID;
else if($record->password!==md5($this->password))
$this->errorCode=self::ERROR_PASSWORD_INVALID;
else
{
$this->_id=$record->id;
$this->setState('title', $record->title);
$this->errorCode=self::ERROR_NONE;
}
return !$this->errorCode;
}
}
public function getId()
{
return $this->_id;
}
When we cover login and logout in the next section, we'll see that we pass this identity
class into the login method for a user. Any information that we store in a state (by calling
CBaseUserIdentity::setState) will be passed to CWebUser, which in turn will store them in
a persistent storage, such as session. This information can then be accessed like
properties of CWebUser. In our example, we stored the user title information via$this-
>setState('title', $record->title);. Once we complete our login process, we can obtain the
title information of the current user by simply using Yii::app()->user->title (This has been
available since version 1.0.3. In prior versions, one must instead use Yii::app()->user-
>getState('title').)
Info: By default, CWebUser uses session as persistent storage for user identity
information. If cookie-based login is enabled (by setting CWebUser::allowAutoLogin to
be true), the user identity information may also be saved in cookie. Make sure you do
not declare sensitive information (e.g. password) to be persistent.
Login and Logout