PHP create Excel spreadsheet and then email it as an attachment

I'm using the following code:

<?php
$data = $_REQUEST['datatodisplay'];
header("Content-Type: application/vnd.ms-excel");
header("Content-Disposition: attachment; filename=Data.xls");
header("Pragma: no-cache");
header("Expires: 0");

echo $data;

?>

This is what i call when the user hits a submit button. But what i'm interested in doing is sending an Excel spreadsheet as an email attachment. So in this file below I would connect to a DB, select results and create the spreadsheet, then mail it as an attachment. Is that possible by tweaking the code below (i can do the mysql but just not excel creation)