title: Should we either use PHP websocket or Node.js? Or are they totally different things?
body: <p>I'm a newbie in the realm of sockets and NODE.js. I apologize if it seems so obvious.<br>
  I've recently read so many article about NODE.js, but today stumbled upon <a href="http://socketo.me/" rel="nofollow">Ratchet websocket</a>. a php component library that use can use to build chat applications and other thing. Is there any difference between them? When should we use node or the other? Are they similar or totally different things? Could someone shed some light on the subject please I'm in dark now?</p>