Reply to thread

Give it a try with a test user, until you get results you are satisfied with.

I now use this string (copied and pasted from my test forum):

/[^\x00-\xff\x{1f300}-\x{1f9ff}\x{2116}-\x{215e}\x{2600}-\x{27ff}]/u

That also allows the extended European characters while dumping emoji.  I may not have tested every iteration of it, but in all the testing I did on this a couple of years ago, it worked.  There is no reason [USER=450]@Jeremy P[/USER]'s regex won't work either--it is more limiting but will ensure the cleanest usernames possible.