rabbitmq and php - Process multiple queues with one worker (broker)

I can show you how to it with enqueue library. I must warn you, there is no way to consume messages asynchronously in one process. Though you can run a few processes that serve a set of queues. They could be divided into groups by the queue importance.

Install the AMQP transport and consumption library:

composer require enqueue/amqp-ext enqueue/enqueue

Create a consumption script. I assume that you have an array of queue names already fetched from DB. They are stored in $queueNames var. The example bound the same processor to all queues but you can set different ones, of course.

<?php

use Enqueue\AmqpExt\AmqpConnectionFactory;
use Enqueue\Consumption\QueueConsumer;
use Enqueue\Psr\PsrMessage;
use Enqueue\Psr\PsrProcessor;

// here's the list of queue names which you fetched from DB
$queueNames = ['foo_queue', 'bar_queue', 'baz_queue'];

$factory = new AmqpConnectionFactory('amqp://');

$context = $factory->createContext();

// create queues at RabbitMQ side, you can remove it if you do not need it
foreach ($queueNames as $queueName) {
    $queue = $context->createQueue($queueName);
    $queue->addFlag(AMQP_DURABLE);

    $context->declareQueue($queue);
}

$consumer = new QueueConsumer($context);

foreach ($queueNames as $queueName) {
    $consumer->bind($queueName, function(PsrMessage $psrMessage) use ($queueName) {
        echo 'Consume the message from queue: '.$queueName;

        // your processing logic.

        return PsrProcessor::ACK;
    });
}

$consumer->consume();

More in doc