allow the # character nickname

hello to all

I want to know if it's possible to allow the # character nickname?
Here's what I have for now

return ( preg_match( '/^[a-zA-Z0-9_.!-]+$/', $arg0 ) and !file_exists( $dir['root'] . $arg0 ) );

What should I add?
thank you

Try this.

return ( preg_match( '/^[a-zA-Z0-9#_.!-]+$/', $arg0 ) and !file_exists( $dir['root'] . $arg0 ) );

And test before putting into production as it may break something.  I tried using space with user names; nicknames, and ran into problems with the uploader if I recall correctly.

a big thank you it works
currently no specific worries but if there was ever a problem I'll keep you informed

Again thank you to you both!

Hello,
I found a little problem
With the new nickname, I do not find her profile, it notes, page not found

Should I change something?

thank you

Yea. I should have remembered this.

You will not be able to use the # as part of a nickname. The # is also known as a hash character and has special meaning when part of a URL, so it's a character that can't be used as part of a url. So because of that and the fact that a nickname is used in the url when looking up profiles it will not work.

You have two choices. Either forget the idea of allowing a hash(#) in the nickname, or you will have to shut off the use of friendly urls(permalinks) for any url that contains the nickname. Meaning profiles, video, photo and other albums, and many other areas of dolphin.

My suggestion. Put it back the way it was, and forget about using the hash character as part of a nickname. I forgot it was a invalid character in a url. If i had remembered that, i would not have even provided the solution to begin with.

And that will go for other special use characters like the question mark (?).

& ampersand as well is another one that can't be used.

 of course..

ok thank you for your help everyone!
I'll put everything