title: Is PHP's "Virtual Directory Support" what I think it is?
body: <p>I see the entry in phpinfo(), and if it's what I think it is, then that would be great! We're on IIS and so I'm well familiar with virtual directories and have wanted that feature in PHP for a long time. Yes, I've googled it, but all I find is questions about how to enable it, but nowhere - not even on php.net - can I find a description of the feature.</p>
  
  <p>So, PHP "Virtual Directory Support" is..?</p>