$q = mysql_query("SELECT hash,lastmodified FROM ts3users");
$tmpDbusers = mysql_fetch_assoc($q);

$dbusers = array();
foreach ($dbusers as $tmp) {
    $dbusers[$tmp['hash']] = $tmp;
}

unset($tmp,$tmpDbusers,$q)


$ts3users = $ts3->clientList();

foreach ($ts3users as $user) {
    $userhash = md5($user['uuid']);

    if ($dbusers[$userhash]['lastmodified'] < time()-3600) {
        // ref
        $dane = $user['dane'];
        $q = mysql_query("UPDATE ts3users WHERE hash=$userhash SET dane=$dane");
    }
}