facebook 팬페이지 확인하기

http://www.masteringapi.com/tutorials/facebook-api-check-if-a-user-is-fan-of-a-facebook-page/20/

결론은 

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

이런식으로 호출하고




데이터 없으면

Array
(
    [data] => Array
        (
        )

)

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

        )

)
이런형태로 값을 리턴해준다.

php-sdk
 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;
  }

Javascript
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!');
    }
});

Using the REST API pages.isFan method
PHP
$isFan = $facebook->api(array(
    "method"    => "pages.isFan",
    "page_id"   => $page_id,
    "uid"       => $user_id
));
if($isFan === TRUE)
    echo "I'm a fan!";


Javascript
FB.api({ method: 'pages.isFan', page_id: '184484190795', uid: 'user_id' }, function(resp) {    if (resp == true) {      Log.info('user_id likes the Application.');    } else if(resp.error_code) {      Log.error(resp.error_msg);    } else {      Log.error("user_id doesn't like the Application.");    }});



Using the FQL page_fan table
PHP
$result = $facebook->api(array(
    "method"    => "fql.query",
    "query"     => "SELECT uid FROM page_fan WHERE uid=$user_id AND page_id=$page_id"
));
if(count($result))
    echo "$user_id is a fan!";


Javascript
FB.api({
        method:     'fql.query',
        query:  'SELECT uid FROM page_fan WHERE uid=user_id AND page_id=page_id'
    }, function(resp) {
        if (resp.length) {
            alert('A fan!')
        } else {
            alert('Not a fan!');
        }
    }
);



많기도 하다.


필살기
		$signed_request = $facebook->getSignedRequest(); 
		$like =$signed_request['page']['liked'];
이게 젤 편하다 리턴값은 boolean