title: Php - get parent-script name
body: <p>parent.php:</p>
  
  <pre><code>require_once 'child.php';
  </code></pre>
  
  <p>child.php:</p>
  
  <pre><code>echo __FILE__;
  </code></pre>
  
  <p>It will show '.../child.php'</p>
  
  <p>How can i get '.../parent.php'</p>