PHP/Node/Redis/Socket.IO

API.php

<?php
// require autoload

/*
 *	Setup Redis for PubSub for events
*/
$redis = new Predis\Client();
$pub = new Publisher($redis, 'pintourny', $subdomain);

$pub->send('event.type', $someData);

node-server.js

// this is the file in it's entirity, it just echos from the php publisher
var redis = require("redis"),
	listener = redis.createClient(),
	io = require('socket.io').listen(773,{
		'close timeout': 3600, // 60 minutes to re-open a closed connection
		'browser client minification': true,
		'browser client etag': true,
		'browser client gzip': true
	});


io.sockets.on('connection', function(socket){
	var domain = socket.handshake.headers.host,
		sub_domain = domain.split('.').shift();

	socket.join(sub_domain);
});


listener.on('message', function(channel, evt){
	evt = JSON.parse(evt);

	var type = evt.type,
		data = evt.data,
		room = evt.room;

	io.to(room).emit(type, data);
});
listener.subscribe('pintourny');

Publisher.php

<?php

class Publisher {
	
	public $pub;
	public $channel;
	public $room;

	public function __construct($pub, $channel, $room){
		if(!method_exists($pub, 'publish'))
			throw new InvalidArgumentException('Pub must be an object with a publish method');

		$this->pub = $pub;
		$this->channel = $channel;
		$this->room = $room;
	}

	public function send($type, $msg){
		$evt = new StdClass();
		$evt->room = $this->room;
		$evt->type = $type;
		$evt->data = $msg;

		return $this->pub->publish($this->channel, json_encode($evt));
	}

}

the subdomain variable is just a room to split connections up to within socket.io. This was used as part of a service where individual things would be hosted under unique subdomains