What is the difference between liking similar urls

When FB user "Likes" url "http://www.example.com/", does he also "Like" "http://www.example.com/index.php?a=10" and "http://www.example.com/somescript.php?g=6"?

I'm confused, help please! I've got an app run throug开发者_如何学运维h a page tab at fb page and need my this app to detect if user has liked that page.

Is that possible?

Each one, in the eyes of Facebook, are completely different URLs.

In an ideal world, you would set your htacess file to use friend URL's so that all the "liker" and "facebook" would ever see, is the same URL.