用markdown编辑下

我想问下,captcha是哪个类里的方法啊?

public function accessRules() {
        return array(
            array('allow', // allow all users to perform 'index' and 'view' actions
                'actions' => array('login', 'captcha'),
                'users' => array('*'),
            ),
            array('deny', // deny all users
                'users' => array('*'),
            ),
        );
    }

码子来了