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XF 1.1 How to only allow certain characters for usernames.

Discussion in 'XenForo Questions and Support' started by ix2013, Jul 10, 2013.

  1. ix2013

    ix2013 Member

    How can I only allow a-z A-Z, numbers and _ in usernames on registration?
  2. Brogan

    Brogan XenForo Moderator Staff Member

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