title: PHP Xdebug issue - date.timezone & session.save_path undefined
body: <p>After installing and enable xdebug <code>date.timezone</code> and <code>session.save_path</code> shows no value. If I disable the xdebug, everything works well.</p>
  
  <p>So, why above values becomes empty when I enable xdebug?</p>
  
  <p>Additional Information:</p>
  
  <pre><code>xdebug version: 2.2.3
  Php version: 5.5
  OS: Ubuntu 14.04
  </code></pre>