1, redis expand sure you have installed, you can use php -v view. If not installed expand refer to install redis extensions under Linux .
2, download documents https://github.com/Lijianeng10/socket-
3, the specific use refer to the official documentation https://github.com/walkor/phpsocket.io/tree/master/docs/zh
4, $ sender_io = new SocketIO (2120); this must be set declaratively IP address SocketIO.php file.
Indicate on the 8090 socket server listening port
5, the client starts to connect the server
