<?php

$loop = React\EventLoop\Factory::create();

$context = new React\ZMQ\Context($loop);

$push = $context->getSocket(ZMQ::SOCKET_PUSH);
$push->connect('tcp://127.0.0.1:5555');

$i = 0;
$loop->addPeriodicTimer(1, function () use (&$i, $push) {
    $i++;
    echo "sending $i\n";
    $push->send($i);
});

$loop->run();

<?php

$loop = React\EventLoop\Factory::create();

$context = new React\ZMQ\Context($loop);

$pull = $context->getSocket(ZMQ::SOCKET_PULL);
$pull->bind('tcp://127.0.0.1:5555');

$pull->on('error', function ($e) {
    var_dump($e->getMessage());
});

$pull->on('message', function ($msg) {
    echo "Received: $msg\n";
});

$loop->run();