Facebook deauthorize my app

Question

Can I use Facebook PHP SDK to deauthorize my app for a particular user, basically I like to have a toggle so the user can link or unlink their facebook account to my site, I

Answer 1

If you go to Facebook Developer, then select your application, then under the "Advanced" menu there is a field called "Deauthorize Callback". Set this as a URL on your domain which is pinged when a user deauthorizes themselves, there is some documentation on the format of the data it requests here.