Fixing Facebook’s PHP SDK logout

By Sam on June 20, 2011

If you request the “offline_access” permission when using the Facebook PHP SDK (and sometimes even without it), it makes the default logout functionality not work very well.  To fix this, here’s what worked for me:

  1. Change your logout url: 
    $logoutUrl = $facebook->getLogoutUrl(array( 'next' => ($fbconfig['baseurl'].'logout.php') ));
  2. On your logout.php page, add the following code: 
    setcookie('fbs_'.$facebook->getAppId(), '', time()-100, '/', 'domain.com');
session_destroy();
header('Location: /');

This should correctly logout your users.

Posted in | Tagged | 8 Responses

8 responses to “Fixing Facebook’s PHP SDK logout”

  1. Sandip Ghosh
    Sandip Ghosh
    July 1, 2011 at 9:24 am |

    Thanks!… It work’s nice!…

  2. pushkar rana
    pushkar rana
    July 21, 2011 at 9:45 pm |

    i want that user must go through fb login everytime….but above solution not work fine for me!.
    Any idea what should I do?

  3. Sam
    Sam
    July 26, 2011 at 3:18 pm |

    Check your login link, it may be setting a cookie.

  4. Jay
    Jay
    July 27, 2011 at 12:07 pm |

    hi, you didn’t tell that we had to include the facebook js to the logout.php page! It wouldn’t work for me until I included it.

    eg

    require ‘scripts/facebook.php’;

    // Create our Application instance (replace this with your appId and secret).
    $facebook = new Facebook(array(
    ‘appId’ => ‘xxxxxxxxxxxxxx’,
    ‘secret’ => ‘xxxxxxxxxxxxxxxxxxxxxxxxx’,
    ));

    setcookie(‘fbs_’.$facebook->getAppId(), ”, time()-100, ‘/’, ‘http://www.repjesus.com‘);
    session_destroy();
    header(‘Location: /’);

  5. Carl-Fredrik Herö
    Carl-Fredrik Herö
    September 9, 2011 at 8:29 am |

    THANK YOU! I was going nuts.

  6. Ben Baker
    Ben Baker
    September 27, 2011 at 12:35 am |

    You are a star! Bejesus that was right pain!

  7. Indira Chavez
    Indira Chavez
    January 18, 2012 at 1:10 pm |

    Thank you very much!!!!You just save my life today. I was getting lots of errors and then I found this. Problem solved.
    Thanks again!!!!

  8. Francis
    Francis
    February 1, 2012 at 5:30 pm |

    wow i was stuck with logout problem for hours and you just fixed it. Thanks a million times! ;P

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