As I understand if I want to use socket.io client API I have to run node.js as a container for socket.io server side code and then I can create a new emmiter fo

As I understand if I want to use socket.io client API I have to run node.js as a container for socket.io server side code and then I can create a new emmiter for my server language (similar to PHP example in the article) Is it correct? Is it possible to create own implementation of socket.io server side code?