I think strange things happen if you use later versions of php that is why it was was recommended that it should be used with Xampp 1.7.3 in the past.
To get rid of hack attempt you need to login to the game once first.
As an fix you could rename hack attempt to 'please login to the game first to authenticate' lulz.
The code needs updating by an exp PHP coder that understands it, since the web site is rather simple it shouldn't be to hard. That is why I prefer this web more then some complex ones.
I have modified the chumpy web a little bit in the past and suppressed some notices, I use later version of Xampp.
I believe that the URL is not in the main anymore.