<?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);
}