I ix2013 Member Jul 10, 2013 #1 How can I only allow a-z A-Z, numbers and _ in usernames on registration?
P Paul B XenForo moderator Staff member Jul 10, 2013 #2 http://xenforo.com/community/threads/a-new-editor-and-much-much-more.50519/page-26#post-552394 For your specific requirements: ^[a-zA-Z0-9_]+$ Upvote 0 Downvote
http://xenforo.com/community/threads/a-new-editor-and-much-much-more.50519/page-26#post-552394 For your specific requirements: ^[a-zA-Z0-9_]+$
