GetCallbackData returns only small portion of $_POST data

[Mhbuur]

The security check in GetCallbackData is much welcome. However the small portion of $_POST data returned is problematic if you are working with provider specific return values (such as status codes).

Perhaps you could add another entry ("InternalData" or "PostData") to the associative array result and simply dump $_POST there)

[Jemt]

To create a standardised payment interface, only a subset of features and information can be provided - the lowest common denominator. But provider specific data could be passed on as suggested. However, we need to make it clear that using it would most likely prevent users from replacing one provider with another without changing integration code.