You have already create html report in table format. if you want to convert the html table into spreadsheet file, Microsoft Office Excel or OpenOffice.org Spreadsheet, please check this tips.

spreadsheet.php
<?php
if ($_GET['mode']=='xls') {
header("Content-type: application/vnd.ms-excel");
header("Content-Disposition: attachment; filename=spreadsheet.xls");
} elseif ($_GET['mode']=='ods') {
header("Content-type: application/vnd.oasis.opendocument.spreadsheet");
header("Content-Disposition: attachment; filename=spreadsheet.ods");
}
header("Pragma: no-cache");
header("Expires: 0");
?>
<table border="1">
<tr bgcolor="#DEDEDE"><td><strong><font face="Arial">City</font></strong></td>
<td><strong><font face="Arial">Country</font></strong></td>
<td><strong><font face="Arial">Population</font></strong></td>
</tr>
<tr> <td>Tokyo</td><td>Japan</td><td>28025000</td></tr>
<tr> <td>Mexico City</td><td>Mexico</td><td>18131000</td></tr>
<tr> <td>Mumbai</td><td>India</td><td>18042000</td></tr>
<tr> <td>Sao Paulo</td><td>Brazil</td><td>17711000</td></tr>
<tr> <td>New York City</td><td>USA</td><td>16626000</td></tr>
</table>

Usage :

<a href="spreadsheet.php?mode=xls" target="_blank">Open as Microsoft Office Excel</a>
<a href="spreadsheet.php?mode=ods" target="_blank">Open as OpenOffice.org Spreadsheet</a>

Examples :


Open as Microsoft Office Excel
Open as OpenOffice.org Spreadsheet