How to get the username of a user id

[RS_Jelle]

You use
$vbulletin->userinfo['username']
to get the username of the current logged in user, and you use
$vbulletin->userinfo['userid']
to get the user id of the current logged in user.

But how can you get the username of a user, when you have the user id ?

[merk]

Youll need to use php code, but something like

$newuser = fetch_userinfo($userid);

$newuser['username']