<?php 

$exchangeName = 'demo';
$queueName = 'hello';
$routeKey = 'hello';

$connection = new AMQPConnection(array('host' => '127.0.0.1', 'port' => '5672', 'vhost' => '/', 'login' => 'guest', 'password' => 'guest'));
$connection->connect() or die("Cannot connect to the broker!\n");
$channel = new AMQPChannel($connection);
$exchange = new AMQPExchange($channel);
$exchange->setName($exchangeName);
$exchange->setType(AMQP_EX_TYPE_DIRECT);
$exchange->declareExchange(); // AMQP 1.2.0 由 declare() 改为 declareExchange(); 
$queue = new AMQPQueue($channel);
$queue->setName($queueName);
$queue->declareQueue();//AMQP 1.2.0 由 declare() 改为 declareQueue(); 
$queue->bind($exchangeName, $routeKey);

var_dump('[*] Waiting for messages. To exit press CTRL+C');  
while (TRUE) {  
        $queue->consume('callback');
}


function callback($envelope, $queue) {  
        $msg = $envelope->getBody();
        var_dump(" [x] Received:" . $msg);
        $queue->nack($envelope->getDeliveryTag());
}

$connection->disconnect();
 ?>