Conectar webdriver com phantomjs

gistfile1.txt

require_once __DIR__ . "/vendor/autoload.php";

use \Facebook\WebDriver\Remote\WebDriverCapabilityType;
use \Facebook\WebDriver\Remote\RemoteWebDriver;
use \Facebook\WebDriver\WebDriverDimension;

$host = '127.0.0.1:8910';
$capabilities = array(
    WebDriverCapabilityType::BROWSER_NAME => 'phantomjs',
    'phantomjs.page.settings.userAgent' => 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:25.0) Gecko/20100101 Firefox/25.0',
);
$driver = RemoteWebDriver::create($host, $capabilities, 5000);

$window = new WebDriverDimension(1024, 768);
$driver->manage()->window()->setSize($window);

$driver->get('https://www.google.ru/');

$driver->takeScreenshot('/tmp/screen.png');
$driver->quit();