How to implement a push notification based system using: PHP/MySQL, Elephant.io, Node.js, and MQTT.

1. PHP
Push Notification System
Mohammed S Shurrab
CTO, Datrios.com
CTO, UnitOne.ps

2. Pull vs Push!
Pull
Push

3. Architecture

4. Requirements

Back-end

Mosquitto server (http://mosquitto.org/)

Node.js (http://nodejs.org/)

Socket.io module (npm install socket.io)

Zeparser module (npm install zeparser)

MQTTClient (https://github.com/yilun/node_mqtt_client)

Front-end

Sockit.IO (http://cdnjs.com/libraries/socket.io/)

jQuery (http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js)

5. Client code
1. Connect to the node.js server through soket.io (L:5)
2. Subscribe to some topic(s) (L:10)
3. Listen to any notification for these topics (L:7-9)

6. Node.js code (1/3)
1. include the required modules (L:1-5)
2. Specify the web socket port (L:5)
3. Connect to the MQTT server (L:6)

7. Node.js code (2/3)
1. Listening to a successful socket connection (L:8)
1. Listening to a subscribing request from the client (L:9-13)
1. Filtering the web socket data based on the topics (L:11)
2. Listening to a notify request from the server (L:15-18)

8. Node.js code (3/3)
1. Listening to a new notification from the MQQT server (L:21)
1. Sent these notification through the web socket (L:23-25)
2. Listening to a successful connection with the MQTT server and sent a test
notification every 5 seconds (L:29-33)

9. DEMO