Store session variable value in zend framework example

Store session variable value  Zend_Session::start();
            $userDetails = new Zend_Session_Namespace('userDetails');
            $userDetails->id = '123';
            $userDetails->username ='username';
            $userDetails->password = 'password';
            $userDetails->cpassword = 'cpassword';
            $userDetails->email = 'email';

get session Like

CODE: SELECT ALL

$userDetails = new Zend_Session_Namespace('userDetails');
echo $userDetails->username;

distory session like

CODE: SELECT ALL

$userDetails = new Zend_Session_Namespace('userDetails');
$userDetails->unsetAll();