Question

The question might sound a bit dull at first and I’m baffled myself..
I’m developing a PHP application that relies heavily on the Facebook API, thus is using the PHP SDK to connect and getting the currently logged in user via

$fb->getUser();

I have also included the Javascript SDK but its currently only fetching the logged in user and prints their data object to the console.

Today I began to implement a local dev-version of the app, set up a second dev-app on Facebook, connected them and voila.. it doesn’t work.
getUser() always returns 0 for me locally.
What I just found out though is that it works in Firefox.
I var_dump the getUser() value, and recieve a full user id (mine) in Firefox, but 0 in Chrome (and yes, I’m logged in to Facebook on both browsers).

I cleared the cache, cookies, destroyed the session.. I just cant imagine what difference the browser makes for a PHP request to Facebook?
Has anybody ever experienced anything like this?
Obviously the app_key and secret must be correct because it works on Firefox.

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Edit: just for reference, the live version of the application (hosted) works well in Chrome, it’s only this very local app that I can’t get to work.

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Edit#2: This is the Javascript that I run on the app

  <div id="fb-root"></div>
  <script>
    window.fbAsyncInit = function() {
      FB.init({
        appId      : {$_connect.app_id}, // App ID
        channelUrl : '{$_connect.channel_file}', // Channel File
        status     : true, // check login status
        cookie     : true, // enable cookies to allow the server to access the session
        xfbml      : true  // parse XFBML
      });
    {if !$_user.is_authorized}
    // listen for and handle auth.statusChange events
    FB.Event.subscribe('auth.statusChange', function(response) {
      if (response.authResponse) {
        // user has auth'd your app and is logged into Facebook
        FB.api('/me', function(me){
          if (me.name) {
            console.log(me);
            //window.location = 'index.php';
            // redirection is currently causing loop
          }
        })
      } else {}
    });
    {/if}
    };
    // Load the SDK Asynchronously
    (function(d){
       var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
       if (d.getElementById(id)) {return;}
       js = d.createElement('script'); js.id = id; js.async = true;
       js.src = "//connect.facebook.net/de_DE/all.js";
       ref.parentNode.insertBefore(js, ref);
     }(document));
  </script>

Answer 1

I just cant imagine what difference the browser makes for a PHP request to Facebook?

The only thing, of course, can be the parameters.

And in this scenario, it’s most likely the cookies – the cookies, that Facebook sets on successful login and that the browser has to accept and send back to the server, for the PHP SDK to be able to recognize the logged in user.

So, check if your Chrome accepts these cookies when you are testing your app locally.