title: Anyway to get a users Facebook ID from the fbsr_app-id cookie?
body: <p>When someone visits my site via a facebook invite; is there anyway I can get their facebook user ID from the fbsr cookie?</p>
  
  <p>eg:</p>
  
  <p>[fbsr_235734256463063] => VWllUkB-HRAwgRSdggGNSwAIZ_-VIno11CBRVqZXeiB.qyJhbGdvcml0aG0iOiJITUFDLVNIQTI1NiIsImNvZGUiOiJlY2JjY2EwZDgwOTg3NzAyNjQ4MWFhZjcuMS0xMDAwMDMxMTkxNDQ3MTN8SUlId19hanZxUUdOLWxfSFpuZXRhalpicGRVIiwiaXNzdWVkX2F0IjoxMzI2MjE0MzA0LCJ1c2VyX2lkIjoiMTAwMDAzMTE5MTQ0NzEzIn0  </p>
  
  <p>Can I decrypt that lot with PHP, and get the users FB ID?</p>
  
  <p>Thanks</p>