How is the page id of a facebook page assigned? Will it be different across different apps? We are trying to build an app which requires all the pages liked by a user. For this purpose , page ids are stored in a database.We do not want same page to be in the database twice
Only User IDs are App Scoped, Page IDs are always the same. At least at the moment, of course it´s possible that Facebook changes it in the future.