What's method for checking user fan of a page in GRAPH API?

Question

In graph api, Pages.isFan method not working, what's method for checking user fan of a page in graph api?

Thanks.

Answer 1

UPDATE 2:
To check if the current user is a fan of the Facebook page on landing at your tab check this answer.

---

UPDATE:
You can use the likes connection to check if a user is a fan of a page:

https://graph.facebook.com/me/likes/PAGE_ID
&access_token=ACCESS_TOKEN

This would return either an empty data array:

Array
(
    [data] => Array
        (
        )

)

Or if fan:

Array
(
    [data] => Array
        (
            [0] => Array
                (
                    [name] => Real Madrid C.F.
                    [category] => Professional sports team
                    [id] => 19034719952
                    [created_time] => 2011-05-03T20:53:26+0000
                )

        )

)

So this is how we check using the PHP-SDK:

<?php
require '../src/facebook.php';

// Create our Application instance (replace this with your appId and secret).
$facebook = new Facebook(array(
  'appId' => 'APP_ID',
  'secret' => 'APP_SECRET',
));

$user = $facebook->getUser();

if ($user) {
  try {
    $likes = $facebook->api("/me/likes/PAGE_ID");
    if( !empty($likes['data']) )
        echo "I like!";
    else
        echo "not a fan!";
  } catch (FacebookApiException $e) {
    error_log($e);
    $user = null;
  }
}

if ($user) {
  $logoutUrl = $facebook->getLogoutUrl();
} else {
  $loginUrl = $facebook->getLoginUrl(array(
    'scope' => 'user_likes'
  ));
}

// rest of code here
?>

Similar script usingJS-SDK:

FB.api('/me/likes/PAGE_ID',function(response) {
    if( response.data ) {
        if( !isEmpty(response.data) )
            alert('You are a fan!');
        else
            alert('Not a fan!');
    } else {
        alert('ERROR!');
    }
});

// function to check for an empty object
function isEmpty(obj) {
    for(var prop in obj) {
        if(obj.hasOwnProperty(prop))
            return false;
    }

    return true;
}

Code taken from my tutorial.

---

While pages.isFan is still working for me, you can use the FQL page_fan table with the new PHP-SDK:

$result = $facebook->api(array(
    "method"    => "fql.query",
    "query"     => "SELECT uid FROM page_fan WHERE uid=$user_id AND page_id=$page_id"
));
if(!empty($result)) // array is not empty, so the user is a fan!
    echo "$user_id is a fan!";

From the documentation:

To read the page_fan table you need:

• any valid access_token if it is public (visible to anyone on Facebook).
• user_likes permissions if querying the current user.
• friends_likes permissions if querying a user's friend.