Skip to main content

This site requires you to update your browser. Your browsing experience maybe affected by not having the most up to date version.

We're retiring the forums!

The SilverStripe forums have passed their heyday. They'll stick around, but will be read only. We'd encourage you to get involved in the community via the following channels instead:

E-Commerce Modules /

Discuss about the various e-commerce modules available:
Ecommerce, SS Shop, SilverCart and SwipeStripe
Alternatively, have a look the shared mailinglist.

Moderators: martimiz, Nicolaas, Sean, Ed, frankmullenger, biapar, Willr, Ingo, Jedateach, swaiba

[SOLVED] Delivery Price Modifier based on Cart Quantity

Go to End

2 Posts   908 Views


Community Member, 57 Posts

30 December 2011 at 8:52am

Hey guys,

I am looking to set up a delivery modifier that will adjust the pricing based on the following:

Domestic Shipping (within NZ) will be $7.50 for up to 3 items, and the same for any additional items ordered,
for example 1-3 items: $7.50, 4-6 items: $15.00, 7-9 items: $22.50 and so on.

International Shipping will be $15.00 per item flat rate.

Any thoughts on the best way to go about this?

I have started by setting the default rate to $15.00 and then will be looking to adjust the SimpleShippingModifier. My thoughts are to create a formula in here based on the number of items in the cart but being a bit of a newb i'm not sure of the best way to get / reference this variable in the modifier?

Any clues?

Thank you,


Community Member, 57 Posts

31 December 2011 at 10:58am

Solved. So managed to figure this out and have achieved the desired result by adjusting SimpleShippingModifier.php as below:

[line 63]

function LiveAmount() {

//Get the Current Order
$o = ShoppingCart::current_order();
$total = $o->SubTotal();
$orderItems = $o->Items();
// Calculate the total quantity of the order
foreach($orderItems as $orderItem){
$totalQuantity += $orderItem->Quantity;

if ($this->LiveCountry() == "NZ"){

$postage = $totalQuantity / 3;
$postage = ceil($postage);
$postage = 7.50 * $postage;
return $postage;

else {
$postage = $totalQuantity * 15;
return $postage;

//return $this->LiveIsDefaultCharge() ? self::$default_charge : self::$charges_by_country[$this->LiveCountry()];