<?php
# sender.php

use Makasim\PhpFpm\PhpFpmConnectionFactory;

require_once __DIR__.'/vendor/autoload.php';

$context = (new PhpFpmConnectionFactory('tcp://localhost:9000'))->createContext();

$queue = $context->createQueue('/app/worker.php');
$message = $context->createMessage('aBody');

$context->createProducer()->send($queue, $message);

<?php
# worker.php

use Makasim\PhpFpm\PhpFpmConnectionFactory;

require_once __DIR__.'/vendor/autoload.php';

$context = (new PhpFpmConnectionFactory('tcp://localhost:9000'))->createContext();
// or
//$context = (new PhpFpmConnectionFactory('unix:///var/run/php/php7.1-fpm.sock'))->createContext(); 

$queue = $context->createQueue(__FILE__);

$consumer = $context->createConsumer($queue);

if ($message = $consumer->receiveNoWait()) {
    // process message

    $consumer->acknowledge($message);
}