自php-webdriver 1.10.0以来的新方法：

// Default behavior, without specifying window type
$driver->switchTo()->newWindow();

// Open new window
$driver->switchTo()->newWindow(WebDriverTargetLocator::WINDOW_TYPE_WINDOW);
// Open new tab
$driver->switchTo()->newWindow(WebDriverTargetLocator::WINDOW_TYPE_TAB);

$driver->switchTo()->window($driver->getWindowHandles()[1]);

更多示例请参见文档。

你可以使用JS解决方案，如：

$webdriver->executeScript("window.open('". $url ."','_blank');", array());

类似这样的东西应该可以工作：

$driver = RemoteWebDriver::create($host, DesiredCapabilities::chrome());
$driver->get('http://mine.com');

// Via driver: http://facebook.github.io/php-webdriver/classes/RemoteWebDriver.html#property_keyboard

$kbd = $driver->getKeyboard();
$kbd->sendKeys(WebDriverKeys.CONTROL,'t');

// Via an element: http://facebook.github.io/php-webdriver/classes/WebDriverElement.html#method_sendKeys

$element = $driver->findElement(WebDriverBy::id('somethingOnScreen'));
$element->sendKeys(WebDriverKeys.CONTROL,'t');

$driver->getKeyboard()->sendKeys(
  array(WebDriverKeys::CONTROL, 't'),
);