We have built and use a custom PHP Backend, Browser based, order processing application where we enter and process customer orders. It's not public facing and is only accessible internally by order processing staff.
What would be the best (easiest) method for integrating customer credit card payments into this system?
I have been looking in to the Ecommerce API using the iFrame integration. Would this work to allow our employees to authorize an order on a customer's credit card... and then later for our shipping system to then charge the customer once the product ships?
Thanks!