in this level i simply changed my referrer header.

 wget -O Pwd.php http://trythis0ne.com/levels/web-challanges/ttp/Pwd.php --header="Referer: http://trythis0ne.com/levels/web-challanges/ttp/TARGET.PHP" && cat Pwd.php

that’s what i get: GoodWork! the password is Cyabr0 :)

Flag: Cyabr0