My company only ships one thing, which is skeins of yarn.  I was looking for a way to change the shipping options so that it only charged the full shipping rate on the first skein of yarn, then the additional piece charge for every skein after that.  Each time I would add a different item to the cart it would charge the full price for the first one, even if I had other skeins already in the cart.

I couldn't find anything here on how to make it work like that so I started looking at the cart.php file and realized that the code looked very similar to Java.  That was fortuitous for me because I just finished taking a Java class.  So, I rewrote part of the code so that it would do what I needed it to, checked the code syntax against the Docs over at php.net and now my cart works as it should!  I wanted to share the code in case anyone needs a similar shipping structure.

To recap what this does, the "Base Shipping Cost" will be applied to "Quantity 1" of the items in your cart.  After that, each additional piece, no matter if they add more of the same item or choose a different one, will have the "Shipping Cost for Each Additional Unit" applied.

(ADMIN NOTE:  Just a heads up…  Lines #3 and 4 below are both meant to be on the same line.  It had to be cut into 2 lines because of word wrapping of the text.)

//Monolithic display cart function
function ShowCart($crtName,$crtPostID,$crtAmount,$crtQuantity,$crtStockQuantity,$crtShipping,
$crtShipping2,$crtHandling,$crtHandlingCart,$crtOptions,$PPOptions){
	include("cart_top.php");

	global $CARTURL,$CURRENCY_SYMBOL,$ACTION_URL,$CHECKOUT_RETURNURL,$CARTDIR;
	
	$checkout = '';
	$prods = '';
	$i = 1;
	$ShippingTotal = 0;
	$GrandTotal = 0;
	$FirstItem = 0;
	
	foreach( $crtAmount as $item =>$amount ){
	
	$Shipping = 0;
	
	if ($crtShipping[$item]){
		if ($FirstItem == 0){
			$Shipping = $crtShipping[$item] + ($crtShipping2[$item] * ($crtQuantity[$item] - 1));
			$FirstItem = 1;
		} else { 
			$Shipping += $crtShipping2[$item] * ($crtQuantity[$item]);
		}

	$checkout .='<input type=
"hidden" name="shipping_'.$i.'" value="'.$Shipping.'" />';
	} 

Thanks nhknittingmama,

that works great! Now I have to go back through all my product posts to update accordingly, as I now need to add standard/priority/international.

Again thanks for the great fix, works just like I need it to.

I am so glad that someone found use in my code!  It is simple code, but it took me a few hours of looking at the different pages and at the documents on PHP coding to figure it out.  It's funny that another Yarnie found this and used it.

The shipping in Market Theme is pretty basic as you can see, hence the need for modified code.  Doing the shipping zones through PayPal Shipping is going to be your best bet unless you want to hire someone who is fluent in PHP to write something custom for you.

Best of Luck!

Hi

Can somebody please help me implement the above mod into the latest version of Market Theme (v4.28), the code is differnet in the latest cart.php file.

Thanks

John