What encoder is used ? And can you do this ?

Hello,
I have some encoded php files, but don't know which encoder is used, and which decoding option I must choose here.
Demo:
http://pastebin.com/YCfWYvix
Can you decode this type of encoding ?
If yes I want to pay for your service for 25 files.
It's really urgent so I need answer as soon as possible.
Thanks.
Bye