It's because $webrobot had characters in it that were being interpreted as part of the regexp. :)

Thank you for the fix. That has been bugging me for a while. ;)

While you're at it, check out http://www.php.net/preg_quote and (IIRC) http://www.php.net/preg . Very useful stuff, that documentation ;)

Thank you. Now it makes a little more sense. It was the forward slash causing problems. One last question...what is the i for ("/i", ) in the line of code? I mean, what does it do exactly?

I have no idea. I know that some permutation of "siU" makes the regular expression not "greedy" but beyond that, no idea.

This is deep stuff. :) Good work filburt.