[Phplib-users] Invalid Regex

[Rob H. <rob...@ws...>]

I am trying to validate the username field, and just to make up some
arbitrary rules, it has to be between 6 and 25 characters long and have no
punctuation.  So my valid regex looks something like "[A-Za-z0-9]{6,}" but
how do I tell it to fail if is has anything else?  Like invalid_regex =
"[^A-Za-z0-9]"?

Thanks,

Rob Hutton
Web Safe
www.wsafe.com