title: dynamic file path in log4php
body: <p>I am new to log4php.</p>
  <p>I would like to save the log files in the format <code>/logs/UserId/Info_ddmmyyyy.php</code>
  where the <code>UserId</code> is dynamic data.</p>
  <p>(I would basically like to save one log per user.)</p>
  <p>Is there any way to change the log file path dynamically?</p>