Found some pretty complex malicious code

Hello,

Found some malicious code on my site and I don’t really understand it, but it seems pretty complex. So I’m posting it here if someone needs to take a look, and prevent this from happening to others.

I’m not sure if it’s a security hole in WordPress, or if my hosting partner got hacked, but here it is:

[Moderated. Please review the Security FAQ.]

Liked I said, pretty complex.

And those who are wondering, my site is ok, nothing was lost, and it was a empty demo site.