I am trying to capture some magento success page variables to pass to our advertising company.

So far I have got this but the variables are not outputting anything:

<?php 
$items = $order->getItemsCollection();
foreach ($items as $item)
{
    $price="'".$item->getPrice()."', ";
    $qty="'".$item->getQty()."', ";
    $sku="'".$item->getSku()."', ";
}
?>

The data needs to be in the format:

'price1', 'price2', 'price3'
'qty1', 'qty2', 'qty3'
'sku1', 'sku2', 'sku3'