Problems with logout if without session in wordpress

Question

I implement the facebook in my wordpress website and everything is working ok except one situation.

If I logout from facebook, and then I click logout in website, I get the error:

FB.logout() called without an access token.

So I replace the logout code with this:

return javascript:if(FB.getAccessToken()){FB.logout(function(){location.href='" . $url . "'})}else{location.href='" . $url . "'}";

(This is done in a wordpress hook, so that I can have the wordpress logout url)

But now, when I click logout in this situation I get a js error:

Unsafe JavaScript attempt to access frame...

How can I be able to logout safely from facebook and wordpress. FB.Logout doesn't have an error callback and doesn't throw any js error, so it's difficult to check that situation.

Thank you!

Answer 1

You need to get the login status first from Facebook, and only if logged in can you call FB.logout. Try the following code.

FB.getLoginStatus(handleSessionResponse);

function handleSessionResponse(response) {

    //if we dont have a session (which means the user has been logged out, redirect the user)
    if (!response.authResponse) {
        return;
    }

    //if we do have a non-null response.session, call FB.logout(),
    //the JS method will log the user out of Facebook and remove any authorization cookies
    FB.logout(response.authResponse);
}