Exporting HTML to Excel

Hi all. This may not be completely a PHP question, but hopefully you will be able to provide some insight. I have a table in HTML that I want to export to an excel spreadsheet. Using PHP, I can create an excel document - however, it's empty/blank. I think I am just doing it incorrectly. Anybody done this before and/or have any ideas? I would prefer to NOT use a third-party program. I've searched the web and php.net, but have been somewhat unsuccessful in finding anything. Here's what I have so far: ------------- <?php header('Content-Type: application/ms-excel'); header('Content-Disposition: attachment; filename="project.xls"'); ?> <table> <tr> <td>Something</td> </td>Something else</td> </tr> </table> ------------- I just want it to have that content in the spreadsheet. It's actually more involved than that, but that's the gist of it. Thanks in advance. ~Philip