add_exchange.php

<?php

# usage: php add_exchange.php 'images'

include(__DIR__ . '/config.php');
use PhpAmqpLib\Connection\AMQPConnection;

$conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST);
$ch = $conn->channel();

$exchange = $argv[1];

$ch->exchange_declare($exchange, 'x-modulus-hash', false, true, false);

config.php

<?php

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

define('HOST', 'localhost');
define('PORT', 5672);
define('USER', 'guest');
define('PASS', 'guest');
define('VHOST', '/');

//If this is enabled you can see AMQP output on the CLI
define('AMQP_DEBUG', false);

consumer.php

<?php

# usage: php consumer.php 'images'

include(__DIR__ . '/config.php');
use PhpAmqpLib\Connection\AMQPConnection;

$queue = $argv[1];

$conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST);
$ch = $conn->channel();

function process_message($msg)
{
    echo "\n--------\n";
    echo $msg->body;
    echo "\n--------\n";

    $msg->delivery_info['channel']->
        basic_ack($msg->delivery_info['delivery_tag']);
}

/*
    queue: Queue from where to get the messages
    consumer_tag: Consumer identifier
    no_local: Don't receive messages published by this consumer.
    no_ack: Tells the server if the consumer will acknowledge the messages.
    exclusive: Request exclusive consumer access, meaning only this consumer can access the queue
    nowait:
    callback: A PHP Callback
*/

$ch->basic_consume($queue, '', false, false, false, false, 'process_message');

function shutdown($ch, $conn)
{
    $ch->close();
    $conn->close();
}
register_shutdown_function('shutdown', $ch, $conn);

// Loop as long as the channel has callbacks registered
while (count($ch->callbacks)) {
    $ch->wait();
}