Where did I go wrong? Please help me. Thank you.

Question

protected function _initialize(){

parent::_initialize(); //Modify here

define('USER_ID', Session:: get('user_id'));

}

protected function isLogin()

{

if(empty(USER_ID)){

$this->error('The user is not logged in and has no access rights',url('user/login'));

}

}

protected function alreadyLogin()

{

if(empty(USER_ID)){

$this->error('The user has already logged in, please do not log in again', url('index/index'));

}

}

index.html:1 Error in event handler for (unknown): TypeError: Cannot read property ' parentNode' of undefined this error message appears, thank you for your help

Answer 1

empty is replaced with defined