Only allow letters, numbers, and underscore in usernames

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Only allow letters, numbers, and underscore in usernames

12-13-2005, 01:33 AM

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Join Date: Jan 2003

Location: United States

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What would I put in order to only allow one space or underscore per username, and not at the beginning or end? A user signed up recently with multiple ___ in it before having any letters. It looks really stupid like that and I want to stop people from doing it. It would also be nice to stop people from SHOUTING in usernames.

Thanks for any ideas.

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