gistfile1.aw

<?php
/*
*  Hello World server
*  Binds REP socket to tcp://*:5555
*  Expects "Hello" from client, replies with "World"
* @author Ian Barber <ian(dot)barber(at)gmail(dot)com>
*/

$context = new ZMQContext(1);

//  Socket to talk to clients
$responder = new ZMQSocket($context, ZMQ::SOCKET_REP);
$responder->bind("tcp://*:5555");

while(true) {
    //  Wait for next request from client
    $request = $responder->recv();
    printf ("Received request: [%s]\n", $request);

    //  Do some 'work'
    sleep (1);

    //  Send reply back to client
    $responder->send("World");    
}