$host = 'http://localhost:4444/wd/hub';
$userAgent='.......';
$options = new ChromeOptions();
$options->addArguments(array(
'--user-agent=' . $userAgent
));
$capabilities = DesiredCapabilities::chrome();
$capabilities->setCapability(ChromeOptions::CAPABILITY, $options);
$driver = RemoteWebDriver::create($host, $capabilities, 3600000, 3600000);
$driver->get('link....');
getResponseCode ???