I would love to have a way for customers to submit their t-shirt orders. I do not need to receive payments from them. We need Item numbers, quantities, colors, size, PO number, date of order and an image of each style garment would be displayed so they can tell the style. Here is a couple examples I have been playing with: http://taketwodesigns.com/shop (I ike this layout best) http://taketwodesigns.com/shop2
Link to where I got the project sample code: https://www.sanwebe.com/2013/06/creating-simple-shopping-cart-with-php/comment-page-1
We have been using Excel spreadsheets to do this, but I would love them to be able to go to a webpage of ours setup in a password secured subdirectory of our main site, place items in the "cart" then submit cart contents as a PDF or email the data from the page itself.
A wordpress solution that saves you the hassle of writing a bunch of code would be to use WooCommerce with this plugin which turns the WooCommerce store into a catalog. There are plenty of free WooCommerce supported themes out there.
By default WooCommerce sends purchase confirmation emails. But if you want a PDF invoice sent you can do that with one of these plugins. WooCommerce will send you an email whenever an order is placed.