MarkAsPaid Method
Marks an invoice as paid.
Object Oriented Interface
public function doMarkAsPaid($invoiceid);
Procedural Interface
inpaypal_invoice_do_markaspaid($res, $invoiceid);
Remarks
This method is used to mark the invoice specified by invoiceId as paid. You can optionally specify details about the payment via PaymentInfo.
After calling this method, the Ack property will indicate success or failure.