application/manage/controller/Start.php
public function login()
    {
        $this->site_title = '欢迎使用';

        $login_url = Url::build('start/doLogin');
        $this->assign('login_url', $login_url);

        $code_url = Captcha::getCodeSrc(self::LOGIN_KEY);
        $this->assign('code_url', $code_url);

        return $this->fetch();
    }
public function login()
    {
        $this->site_title = '欢迎使用';

        $login_url = Url::build('start/doLogin');
        $this->assign('login_url', $login_url);

        $code_url = Captcha::getCodeSrc(self::LOGIN_KEY);
        $this->assign('code_url', $code_url);

        return $this->fetch();
    }
登录页面