public static function addEvent ( $receivers, $event, $data ) {
        if(is_array($receivers)) $receivers = array_map(function($a) { return ['userid' => $a[0], 'server' => $a[1]] }, $receivers);
        $data = array_merge($data, ['event' => $event, 'ts' => microtime(true)]);
        if(!$data || !$data['id']) return false;
        foreach(mem::$m->getAllKeys() as $k) {
            if(substr($k, 0, 3) == 'lp_') {
                $mem = mem::$m->get($k);
                if(!$receivers || in_array(compact($mem['userid'], $mem['server']), $receivers)) {
                    $channel = array_search($event, $mem['channels']);
                    $mem['data'][$channel][$data['id']] = $data;
                    mem::$m->set($key, $mem, 5);
                }
            }
        }
        return true;
    }