Is there a way that I can trigger a payment gateway to process an order that has already been processed already.
i.e. A user selected to pay for an order using the manual payment method and process their order as such. The user then decides to contact the site admin because they instead wish to for this order via another payment gateway.
Is there a way using php that I can allow this to happen and if so where do I look to find the correct methods that will achieve this.