GO GO GO MirKo :)

<?php
/**
 * Register User on Server
 *
 * If you type !register, the server put's you in an other server group
 *
 * @package Plugins
 * @subpackage none
 * @version 1.0
 *
 * @copyright ManuAdminMod (http://www.manuadminmod.de)
 * @license Creative Commons BY-NC-ND 4.0 (http://www.creativecommons.org/licenses/by-nc-nd/4.0/)
 *
 * @author mirko911
 * @since 05.01.11
 */
$mod->registerCommand("register", false , "register_main" );
$mod->setDefaultCV("register_main", "registed_group", "user");
$mod->setDefaultCV("register_main", "registed_message", "You are now registered on this server");
/**
 * If you type !register, the server put's you in an other server group
 * 
 * @author mirko911
 * @since 05.01.11
 * @global mod $mod 
 * @global player $players
 * @param string $guid 32 char long hex guid
 * @return boolean true if all successful
 */
function register_main($guid) {
    global $mod, $players;
    if($players[$guid]->getGroup() != "default") return false;
    $players[$guid]->setGroup($mod->getCV("register_main" , "registed_group"));
    $players[$guid]->Say($mod->getCV("register_main" , "registed_message"));
    return true;
}
?>