stream_socket_client fgets疑问

$this->socket = stream_socket_server("tcp://0.0.0.0:13008", $errno, $errmsg, STREAM_SERVER_BIND | STREAM_SERVER_LISTEN);
$this->event->add($this->socket, EventInterface::EV_READ, array($this, 'acceptConnection'));

$socket = stream_socket_client('tcp://127.0.0.1:13008', $errno, $errmsg, 5);
if($socket)
{
    fwrite($socket, "\n");
    while(!feof($socket))
    {
        var_dump(fgets($socket, 1024));
    }
    fclose($socket);
}