I made a tool
 

The title sounds weird but it's true!

Feedback would be cool.
http://www.adultindex.net/checker/index.php

Huh, funny, was just working on something like that. The fsockopen timeout element doesn't really seem to be working properly though.

Im just using fopen, it seems to be working fine, however I suspect there are a few hosts that don't allow this as the script does freeze on them. They are usually the ones that have popups etc.

Well, I haven't encountered a host yet that didn't allow fopen, but fsockopen gives a bit more versatility. Besides that, if a connection hasn't been established within 10 seconds, a site can go fuck itself. However, for some reason some installations of php ignore that time limit altogether.

Lol, fix the typo at the top of your site "Sposnors we recommend" :thumbsup

It's not a typo, it's a "feature" and it's now fixed! :D