Printable Coupon
We're selling a "Groupon" savings collection and would like to have a printable coupon show up in the paypal receipt if the customer purchases the coupon product. Is there a simple php script that I could use like the one below?
<?php
if(isset($_SESSION['ProductID']))
$_SESSION['ProductID']=1;
echo "<img src="http://domainname.com/imagefilename" />";
else
$_SESSION['ProductID']!=1;
echo "";
?>