need help about restrict shipping method by $cartShowTotal

[auick]

hello all, i need help on how to set up different shipping method base on shopping-cart sub-total.

For example, i like ship by USPS if the sub-total value is less than Us$100, if the sub-total is higher than US$100, it will show one message say you will need to select UPS method.

When i try

if ($cartShowTotal>100) {
$error = true;
}

nothing happen, it seems $cartShowTotal can not be regonized.

Really appreciate for your concern. thanks.

[Ajeh]

That isn't a variable in Zen Cart except on the shopping__cart page so its value is 0 in the checkout_shipping ...

Wouldn't it be better to customize the shipping modules themselves to only display based on price rather than have the customer have to think?

[auick]

Thanks Ajeh for your tips and advice, it is really better and easier.

What i though is shipping method shown bases on shopping cart price, if higher, then unselectable and only show one message.

After two days trace, $_SESSION['cart']->show_total() looks like the one what i am looking for.