facing some issue while integrating paypal standard checkout. It return an empty array with response.
I'm creating an developer account. Using that developer account creating one business account and one personal account on paypal sandbox for testing purpose.
First time test, it return empty array and payment status is pending.
and after that try to test again return "We're sorry, but we couldn't complete your purchase using the funding source you selected. Please add a debit or credit card." I'm using testing card which given by the developer sandbox account.