Getting information out of a PHP object - php

Question

I am trying to make my way through an inherited Yii Framework site. Very little Object Oriented knowledge previously.
I'm printing some user information to see what is there like this...
print_r(Yii::app()->user);
And that's printing out this...
CWebUser Object (
[allowAutoLogin] => 1
[guestName] => Guest
[loginUrl] => Array
(
[0] => /site/login
)
[identityCookie] =>
[authTimeout] => 7200
[autoRenewCookie] =>
[autoUpdateFlash] => 1
[loginRequiredAjaxResponse] =>
[_keyPrefix:CWebUser:private] => 7c6285462394c9a141b5d66dce54e8f2
[_access:CWebUser:private] => Array
(
[Admin] =>
[Judge] =>
[Student] => 1
)
[behaviors] => Array
(
)
[_initialized:CApplicationComponent:private] => 1
[_e:CComponent:private] =>
[_m:CComponent:private] =>
)
I'm trying to get out the information that this user is a Student. I see it! It's ]there!
[Student] => 1
But how would I get that information out?
UPDATE:
Here's the parts of CWebUser that appear to have something to do with _access
private $_access=array();
public function checkAccess($operation,$params=array(),$allowCaching=true)
{
if($allowCaching && $params===array() && isset($this->_access[$operation]))
return $this->_access[$operation];
$access=Yii::app()->getAuthManager()->checkAccess($operation,$this->getId(),$params);
if($allowCaching && $params===array())
$this->_access[$operation]=$access;
return $access;
}

Answer 1

The following should tell you whether the user has 'Student' access:
$isStudent = Yii::app()->user->checkAccess('Student') == 1;

Answer 2

'student' is part of the $_access array. But $_access is private so you can not access it directly.
But there must be a method (function) to get it!
look in the CWebUser class there should be a method like
getStudent();
isStudent();
or may be
$access = getAccess();
$access['student'];
Edit:
checkAccess
seems to be used someting like this checkAccess('student');