OAuth Error: This IP can’t make requests for that application
As Victor Hugo Arango A. said, remove all the IPs in the server whitelist and you’re good to go. To do this: Go to App Settings Advanced (tab) Security (section) remove IP if you see any.
facebook-oauth
Get application id from user access token (or verify the source application for a token)
https://graph.facebook.com/app/?access_token=[user_access_token] This will return the app this token was generated for, you can compare that against your app’s id.
How to extend access token validity since offline_access deprecation
Edit (August 14th 2012): A week ago the official Facebook PHP SDK was updated. The function name was changed to setExtendedAccessToken, and it was decided we actually needed to destroy the session afterwards, to remove the risk of having two active sessions. Also, the function no longer actually returns the token, but instead stores it … Read more