DLX example

Publishing a message

$exchange = 'cache_exchange'; // cache（死信）转给delay
$queue = 'cache_queue';
$routing = 'cache_exchange';
$exchangeType = 'fanout';

$message = ['keyword' => '123 hello word, dlxm, time = ' . date('h:i:sa')];
$message['_uuid'] = $this->genMessageCode($exchange, $routing, $message);

$tale = new AMQPTable();
$tale->set('x-dead-letter-exchange', 'delay_exchange');//****很关键  表示过期后由哪个exchange处理
//$tale->set('x-dead-letter-routing-key', 'delay_exchange');//****很关键  表示过期后由哪个exchange处理
// $tale->set('x-message-ttl', 60);

$properties = [
    'exchange' => $exchange,
    'exchange_type' => $exchangeType,
    'exchange_durable' => true,
    'routing' => $routing,
    'queue' => $queue,
    'queue_passive' => false,
    'queue_durable' => true,
    'queue_exclusive' => false,
    'queue_auto_delete' => false,
    'queue_properties' => $tale,
];

(new Amqp)->publish($routing, json_encode($message), $properties);  

Consuming messages

(new Amqp())->consume('delay_exchange', function ($message, $resolver) {
    $route = $message->delivery_info['routing_key'];
    $messageBody = $message->body;
    $resolver->acknowledge($message);
    echo date('h:i:sa') . '@' . $route . ':' . $messageBody . "consume_success\n";
}, [
    'exchange' => 'delay_exchange',
    'exchange_type' => 'fanout',
]);