title: The real URI of a PHP file?
body: <p>Is there anyway to get the current URI of a file in PHP, regardless of which file it is being included?</p>
  
  <p>for example:</p>
  
  <p><code>a.php</code> is included in <code>b.php</code></p>
  
  <p>But I want to get the URI of the directory in which <code>a.php</code> is located in.</p>