Trying to add affiliate conversion code

Hi,

I’m trying to add conversion code. From what i’ve read i’m supposed to add it to the the tpl-callback.php page. In trying to pass order_id and amount would this code work:

<!– Offer Conversion: Gorilla Nutrition –>
<iframe src=”https://saleslice.go2cloud.org/aff_l?offer_id=6&adv_sub=&lt;?PHP echo $_GET[‘order_id’]; ?>&amount=<?PHP echo $_GET[‘total’]; ?>scrolling=”no” frameborder=”0″ width=”1″ height=”1″></iframe>
<!– // End Offer Conversion –>