想问下WORKERMAN作为客户端的问题

$worker = new Worker('http://0.0.0.0:9090');
$worker->onWorkerStart = function() {
    global $client_A;
    $client_A = stream_socket_client('tcp://平台A的ip:port');
    fwrite($client_A, '登录数据');
};
$worker->onMesage = function($connection, $data) {
    global $client_A;
    fwrite($client_A, '向A发送的数据');
    $result = fread($client_A, 65535);
    $connection->send($result);
};