Web - Server

Hi guys!!!
can someone hint me for controlling $_GET[’h’] parameter ?
i tried to google for full-numeric md5 hash, but i still have stucked here!!
thanks !!!

Did you carefully read this? Finding a fully numeric MD5 hash is straightforward with a few lines of Python, but not strictly necessary.

the goal is to take advantage of how php interpreter treat strings and integers in loose == comparison
read the paper

i can generate a hash and getting humm as response :)