Websocket research links
A WebSocket server is a TCP application listening on any port of a server that follows a specific protocol, simple as that. The task of creating a custom server tends to scare people; however, it can be easy to implement a simple WebSocket server on your platform of choice

Title Ratchet - PHP WebSockets
Description Ratchet is a PHP WebSocket library for serving real-time bi-directional messages between clients and server
Tags ratchet,php