php如何连接kafka发送消息啊？

require 'vendor/autoload.php';

date_default_timezone_set('PRC');

$cOnfig= \Kafka\ProducerConfig::getInstance();

$config->setMetadataRefreshIntervalMs(10000);

$config->setMetadataBrokerList('192.168.83.50:9092');

$config->setBrokerVersion('1.1.0');

$config->setRequiredAck(1);

$config->setIsAsyn(false);

$config->setProduceInterval(500);

$producer = new \Kafka\Producer();



$result = $producer->send(array(

array(

    'topic' => 'test',

    'value' => 'test1....message.',

    'key' => '',

),

));

var_dump($result);