Get Order Increment Id in Magento

Question

I\'m trying to get the Order Increment Id in Magento, on the success.phtml page so that I can use this for affiliate tracking.

I\'m using the following code, but it

Answer 1

This will work perfectly, I m running this one in my module now.

$last_order_increment_id = Mage::getModel("sales/order")->getCollection()->getLastItem()->getIncrementId();

Hope it helps thanks. :)