GatewayClient

[sm2017]

Which is newer?
https://github.com/walkor/GatewayClient/blob/master/Gateway.php
OR
https://github.com/walkor/GatewayWorker/blob/master/src/Lib/Gateway.php

And I think it is better to add GatewayClient as a dependency of GatewayWorker using composer

[walkor]

They are not exactly the same library.
GatewayClient/blob/master/Gateway.php is SDK for any project run on apache or php-fpm to control GatewayWorker(send message, get session, set session, join group etc).
GatewayWorker/blob/master/src/Lib/Gateway.php is API witch must run on GatewayWorker.

All of them will be keep the synchronization update.

[sm2017]

In https://github.com/walkor/GatewayClient we have

Gateway::$registerAddress = 'x.x.x.x:xx';

Is it required to set registerAddress for GatewayWorker/blob/master/src/Lib/Gateway.php?
Now I don't set it but it works for me in Distributed Deployment , I use GatewayWorker/blob/master/src/Lib/Gateway.php form business workers to send message to clients

What happens if I set it?

[walkor]

Is it required to set registerAddress for GatewayWorker/blob/master/src/Lib/Gateway.php?

Gateway::$registerAddress will be automatically obtained from $businessworker->registerAddress witch defined in start_businessworker.php.