Question

I am using a modified version php-sdk version 3.0.0 sample code at github.com/facebook within the CodeIgniter framework as a helper.

My problem is just as the title says: When I click the logout anchor (provided by $Facebook->getLogoutUrl()) I am redirected back to the same page and receive an OAuthException:

Fatal error: Uncaught OAuthException: Error validating access token: The session is invalid because the user logged out. thrown in [...]/base_facebook.php on line 959

When I refresh, it loads the “login” anchor like it normally would. What is happening on that refresh/post-back that isn’t happening on that initial redirect?

I realize this is limited information but due to the problem I think it may be a simple fix.

EDIT: This post seems to be relevant: http://forum.developers.facebook.net/viewtopic.php?id=71219

Specifically this line:

setcookie('fbs_'.$facebook->getAppId(), '', time()-100, '/', '.domain.com');

However, I am not sure how to implement this and still use $facebook->getLogoutUrl();.

Thanks in advance and just let me know if more information is necessary.

Answer 1

I was having the same problem and nearly pulling my hair out. However, after some research, it appears the problem is an offending cookie. This line on logout should fix it:

setcookie('fbs_'.$facebook->getAppId(), '', time()-100, '/', '.domain.com');

Ensure to add the ‘.’ before the domain name if subdomains are being used.

I hope this helps!