title: How to get browser sessionId using Selenium webdriver
body: <p>I'm using selenium webdriver (php-webdriver-bindings Yii extension) and I'm trying to get the browser sessionId (the one that the test will be using).  I thought I could get this through webdriver, but that doesn't seem to be the case.  Webdriver has a sessionId, but that is not the one the test browser is using.  </p>
  
  <p>I'm trying to login prior to the test running to allow my tests to be an authenticated user which will allow them to access the pages I'm testing.  </p>
  
  <p>I've been researching and testing this for a few days now and I'm at a loss.  Any help would be greatly appreciated.   </p>
  
  <p>Thanks.</p>