Oscommerce - Question about variable passing

Hi,

I'm trying to understand how Oscommerce passes form fields and variables. In the [url removed, login to view] page we have a form, and after the user hits "Add To Cart", I want to check the value of a certain form field.

How can I do that?

For example in my [url removed, login to view] page, I have a text box field that is named sign_height.

After the user hits ADD TO CART, how can I check the value of sign_height?

I was thinking I could do something like this:

if (isset($_POST['sign_height'])) { $sign_height = $_POST['sign_height'];}

But I'm not sure where to put this code.

Please advise.

## Deliverables

1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.

2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables):

a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.

b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.

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## Platform

Oscommerce / PHP

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