[Bison]

Like this:

case 'getinfo':
global $DB_site;
$userid = explode('userid=', $userinfo[location]);
$user = $DB_site->query_first("SELECT userid, username FROM user WHERE userid = ".intval($userid[1]));

if ($user[username]) {
$userinfo[where] = "Viewing Profile of <a href=\"member.php?s=$session[sessionhash]&action=getinfo&userid=$user[userid]\">$user[username]</a>";
} else {
$userinfo[where] = "Viewing Profile of a Forum Member";
}