Could anybody tell me what "amfphp" is

Dear guys, I have no idea about what the “amfphp” is.
The problem is I have downloaded an “amfphp” and put it into my “LocalHost” and run a PHP+Flash page which requsts to run with “amfphp”.
The result is it run successful.
Then I upload all file to my website to test it. Before that, I had changed some paths. It’s fail. But I do nothing about the file in “amfphp”.
Could anyone tell me what I can do to run it in my website?