Well Zanus, that is a good idea!
I have this script I have been working on for days, and almost a week now, and I am pretty sure if you did a search on this website with the keywords ELC, or External Link Checker, you would find numerous results with topics by me. That being said, I am encrypting the get url values, after they have been pinged, and they turn out valid, then I am adding them to the database, then checking to see if it blacklisted or not, well in order to check to see if the string is already encrypted I need to see if it is a url! Well if I go ahead and add http:// to the string I would get something like this http://f051adfaf5d5d0d1, so if a users puts in, lets say, phpfreaks.com, I need to determined that this is a valid link, but how?