[magnus]

Woops, forgot about this.. actually, I have it all working using:

PHP Code:

    if (!empty($threadinfo['foousers']))
    {
        $usernames = preg_split('/( )+/', trim(strtolower($threadinfo['foousers'])), -1, PREG_SPLIT_NO_EMPTY);
        foreach ($usernames AS $val)
        {
            if (strpos(strtolower($bbuserinfo['username']), strtolower($val)) !== false)
            {
                foo();
            }
        }
    } 


This is just modified code from vB's Illegalname check.