September 13th, 2009, 05:26 PM
Join Date: Jul 2001
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I'm a little rusty with my regex and there might be something simpler you could use, but try:
Also, AFAIK, domain names don't typically include underscores. You're out of luck if you're trying to match ip addresses with this expression, or if the user ends the domain with / or whatever. I don't really know where you're getting your data from, though, so it's difficult to say whether or not this will be a problem for you.
I tried this against the following (some of which are random domains, some real), and the expression worked out against all of them: