尝试写一个插件，但是报错，有什么方法可以打印一些执行日志辅助调试？已解决悬赏5积分

docker安装了开源版18.12，添加了一个extension/custom/user/ext/model/test.php。代码如下：

class testUserModel extends userModel
{
    public function login($account, $password)
    {
        if ($account !== 'admin'){
          /* 怎么弹个消息 是不是进来这个函数了？*/
          echo("进来了吗");
        }
        return parent::login($account, $password);
    }
}

刷新页面出来：

Parse error: syntax error, unexpected 'class' (T_CLASS), expecting function (T_FUNCTION) or const (T_CONST) in/apps/zentao/tmp/model/open/rnd/tmpuser.php on line2014:13:09 syntax error, unexpected 'class' (T_CLASS), expecting function (T_FUNCTION) or const (T_CONST) in/apps/zentao/tmp/model/open/rnd/tmpuser.php on line20 when visitinguser-loginFatal error: Uncaught EndResponseException in /apps/zentao/framework/base/router.class.php:3492 Stack trace: #0 /apps/zentao/framework/helper.class.php(323): EndResponseException::create('') #1 /apps/zentao/framework/base/router.class.php(3148): helper::end() #2 /apps/zentao/framework/router.class.php(350): baseRouter->saveError(4, 'syntax error, u...', '/apps/zentao/tm...', 20) #3 /apps/zentao/framework/base/router.class.php(3003): router->saveError(4, 'syntax error, u...', '/apps/zentao/tm...', 20) #4 [internal function]: baseRouter->shutdown() #5 {main} thrown in/apps/zentao/framework/base/router.class.php on line3492