phpwebsocket's Introduction

PHPWEBSOCKET

So here is a quick hack to implement websockets in php.
As of Feb/10 the only browsers that support websockets are Google Chrome and Safari nightlies

Changelog

2010.02.18 - Chatbot demo extending websocket class
2010.02.18 - Websocket class for better reuse
2010.02.15 - Added Users list to keep track of handshakes
2010.02.15 - Minor cosmetic changes

Client side

var host = "ws://localhost:12345/websocket/server.php";
try{
  socket = new WebSocket(host);
  log('WebSocket - status '+socket.readyState);
  socket.onopen    = function(msg){ log("Welcome - status "+this.readyState); };
  socket.onmessage = function(msg){ log("Received: "+msg.data); };
  socket.onclose   = function(msg){ log("Disconnected - status "+this.readyState); };
}
catch(ex){ log(ex); }

View source code of client.html

Server side

log("Handshaking...");
list($resource,$host,$origin) = getheaders($buffer);
$upgrade = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
		   "Upgrade: WebSocket\r\n" .
		   "Connection: Upgrade\r\n" .
		   "WebSocket-Origin: " . $origin . "\r\n" .
		   "WebSocket-Location: ws://" . $host . $resource . "\r\n" .
		   "\r\n";
$handshake = true;
socket_write($socket,$upgrade.chr(0),strlen($upgrade.chr(0)));

View source code of server.php

Steps to run the test:

Save both files, client.html and server.php, in a folder in your local server running Apache and PHP.
From the command line, run the server.php program to listen for socket connections.
Open Google Chrome and point to the client.html page
Done, your browser now has a full-duplex channel with the server.
Start sending commands to the server to get some responses.