MyQEE\Server\Register\RPC::reg PHP Method

    public function reg(Host $host)
    {
        if (!$host->port) {
            $this->closeClient('host miss port');
            return false;
        }
        if (!$host->group) {
            $host->group = 'default';
        }
        # 获取连接信息
        $connection = $this->connectionInfo();
        # 没有获取到连接信息
        if (!$connection) {
            return false;
        }
        if (!$host->ip) {
            # 没设置则根据连接时的IP来设置
            $host->ip = $connection['remote_ip'];
        }
        if (is_numeric($host->id) && $host->id >= 0) {
            $hostId = (int) $host->id;
            if (($old = Host::get($hostId, $host->group)) && !$old->removed) {
                # 指定的服务器ID已经存在, 则不让注册
                $this->closeClient('already exists');
                Server::$instance->debug("register server error, server {$hostId} already exists.");
                return false;
            }
        } else {
            # 自动分配ID
            $hostId = false;
            # 在移除的服务器列表中找
            foreach (Host::$table as $k => $v) {
                if ($v['removed']) {
                    if ($v['ip'] === $host->ip && $v['port'] == $host->port) {
                        $hostId = $v['id'];
                        break;
                    }
                }
            }
            if (false === $hostId && false === ($hostId = Host::getNewHostId($host->group))) {
                $this->closeClient('can not assignment id');
                return false;
            }
        }
        # 更新服务器ID
        $host->id = $hostId;
        $host->key = $host->encrypt ? self::random(32) : '';
        $host->fd = $connection['fd'];
        $host->fromId = $connection['from_id'];
        # 返回参数
        $rs = new \stdClass();
        $rs->id = $hostId;
        // 唯一ID
        $rs->key = $host->key;
        // 通讯密钥
        $rs->ip = $host->ip;
        // IP
        $rs->hosts = Host::getAll();
        // 已经连上的服务器列表
        # 保存数据
        $host->save();
        Host::$fdToIdTable->set($host->fd, ['id' => $host->id, 'group' => $host->group]);
        # 返回一个高级对象
        $rpcRs = new Result();
        $rpcRs->data = $rs;
        $rpcRs->on('success', function () use($host) {
            Server::$instance->info("register a new host#{$host->id}: {$host->ip}:{$host->port}");
            $class = get_class($this);
            # 通知所有 RPC 客户端增加服务器
            foreach (Host::$table as $item) {
                # 已被标志为移除的
                if ($item['removed'] > 0) {
                    continue;
                }
                # 刚刚添加的不需要通知
                if ($item['group'] === $host->group && $item['id'] === $host->id) {
                    continue;
                }
                $rpc = new $class($item['fd'], $item['from_id']);
                /**
                 * @var RPC $rpc
                 */
                $rpc->trigger('server.add', $host);
            }
        });
        return $rpcRs;
    }