Can you decode this files ?

Hello sir,

I have search around internet, and want to try your service as the "best decompilation tool". I have find this file, can you decode it ? I'm not sure it's "optimizer", but it's zend'software encoded. Any more details from your tools will be interesting to test.

*****

Regards,
Fred.

Quote from "DeZender":2wp0e87d

Hello,
It would take the whole page, can you send it here : http://speedy.sh

Hello, thanks for your quick answer.
Here the file http://speedy.sh/ct6dJ/get-flag.php

Quote from "DeZender":vlcs8lym

Your file expire, have an idea of its expiration date ?
If you have not, then I can not do anything to run this file.

Hmmm no :-)
If the software wants a format-string like "DD/MM/YYYY", we can suggest a bruteforce ?
Moreover, i'm sure the file was valid before april 2010 which give us a small range of possibilities where scope is :
april 2010 < expiration date < today

What do you think ?

In fact, the file is part of a challenge. I guess the challenge is outdated, but my goal is just to run it and get the output (if the output is not sufficient, i can just hope to recover the plaintext).

Regards.