通过PHP SDK登录Facebook，然后使用JS SDK

Question

I have developed an application where users login via facebook (PHP SDK); now I would like to add JS SDK too, because I want to implement a generic friend selector ( http://facebook-friend-selector.codersgrave.com/ ) that works with JS SDK. I have two questions about:

1) Can mixing the two SDK lead to problems?

2) I added the JS SDK code as explained in the documentation and tried a simple request

FB.api('/me/friends', function(response) {
   alert(JSON.stringify(response));
});

but I get an error (unknown error); I also tried a dialog box

FB.ui({
  method: 'feed',
  link: 'https://developers.facebook.com/docs/dialogs/',
  caption: 'An example caption',
}, function(response){});

but the box appears and suddenly disappears. I think the issue is related to the authentication...I guess, since my users are authenticated via PHP, that I need to pass the access token to JS, but how? This question Passing the Facebook Authorization Token from PHP to Javascript seems to be exactly what I need but I don't understand the answer: it says to store the token in a cookie, but how can JS know about it, which name the cookie should have? Finally, if I do something like

FB.getLoginStatus(function(response) {
  if (response.status === 'connected') {
    alert('connected');
    var uid = response.authResponse.userID;
    var accessToken = response.authResponse.accessToken;
  }
 });

I actually get a "connected" alert, that means that JS knows that the user is logged in, even if the login was via PHP, so where is the problem?

Answer 1

Solved. My code contained two stupid mistakes, this is the correct code:

function test(){
    FB.getLoginStatus(function(response) {
        if (response.status === 'connected') {
            var uid = response.authResponse.userID;
            var accessToken = response.authResponse.accessToken;

            FB.api('/me/friends', function(response) {
                alert(JSON.stringify(response));
            });
        }
    });
}

<a href="" onclick="test();return false;">Test</a>

In the first version the call to the friends method was outside the getLoginStatus method, so it was called before setting the variable accesToken, furthermore, I haven't the "return false" statement after the test() call.