title: reading xls date in php
body: <p>I'm using <a href="https://code.google.com/p/php-excel-reader/" rel="nofollow">php-excel-reader</a> to read an XLS file in my php script, everything is working fine, except for reading a date. It simply return an undefined object.</p>
  
  <ul>
  <li>The XLS file isn't made on my computer and I don't know with witch
  version it was created.</li>
  <li>If I open the file on my computer and save it again, everything works fine. (but I would obviously prefer to avoid having to do that)</li>
  <li>After doing some digging in the php-excel-reader script, I managed to get the value it extracts from the XLS. For example, 41397 instead of 03/05/2013 (d/m/y)</li>
  </ul>
  
  <p>A few questions :</p>
  
  <ul>
  <li>Is this fixable ?</li>
  <li>Is it possible to exploit the 41397 ? Is it a known date format ?</li>
  <li>Is there another xsl to php script where this will work without having to change anything ?</li>
  </ul>