* Tell the server you are going to stop consuming
     * It will finish up the last message and not send you any more
     */
    public function stop()
    {
        echo 'Stopping consumer by cancel command.' . PHP_EOL;
        // this gets stuck and will not exit without the last two parameters set
        $this->_channel->basic_cancel($this->_tag, false, true);
    }
    /**
     * Current connection 
     * 
     * @var PhpAmqpLib\Connection\AMQPSSLConnection
     */
    protected $_connection = null;
    /**
     * Current channel
     * 
     * @var PhpAmqpLib\Channel\AMQPChannel
     */
    protected $_channel = null;
    /**
     * Consumer tag
     * 
     * @var string
     */
    protected $_tag = 'consumer';
}
$consumer = new Consumer();
$consumer->start();