Please tell me: Success when logging in; Notice: Undefined index: hadden in D:\xampp\htdocs\umimall\admin\reg.php on line 11 when registering

Question

The insertion into the database failed, please tell me how to deal with it, thank you

Answer 1

Notice This kind of error can prevent it from being displayed. Even if you do not pass parameters, the page can run normally error_reporting(E_ALL || ~E_NOTICE); Add to the front of the code

Answer 2

Check whether your POST['hadden'] has passed a value