Facebook’s documentation does not explain how you can log users out of their service without using their PHP or JavaScript SDKs. Funny thing is that when I googled for an answer I found a lot of negativity and people claiming it wasn’t possible. Well, clearly it’s possible; how would the PHP or JavaScript SDK’s accomplish it without an endpoint?

As it turns out, it’s really easy. Just add a link to the following url:

https://www.facebook.com/logout.php?access_token=ACCESS_TOKEN&confirm=1&next=REDIRECT

replace ACCESS_TOKEN with your temporary access token (that you got from OAuth) and REDIRECT with the full url of wherever you want to redirect to after logout, for example:

https://www.facebook.com/logout.php?access_token=1234567890&confirm=1&next=http://jstarrdewar.com

You just need to watch out because Facebook apparently changes their logout technique from time to time, hence the confusion. You need to be wary of breaking changes. To get the latest version, you could clone the PHP SDK and see what format is returned by this method: getLogoutUrl