How to check user like the facebook Application or not? - php

Question

How can we check user liked the facebook application or not?
I am trying to create a Facebook app, in it there are two different pages , if user liked then page_1 will be show, otherwise page_2 show.

Answer 1

<?php
$user = $facebook->getUser();
if ($user) {
try{
$user_profile = $facebook->api('/me');
$likeID = $facebook->api(array( 'method' => 'fql.query',
'query' => 'SELECT url FROM url_like WHERE user_id = "'.$user_profile['id'].'" AND url="myurl/"'; ));
}
catch(FacebookApiException $e) { }
}
if(count($likeID)>0) echo "User likes this page";
else echo "User doesn\'t like this page";
?>
credible and/or official sources:
http://www.zuberi.me/2011/how-to-check-if-user-liked-the-application-or-page.html
http://www.chilipepperdesign.com/2011/02/15/reveal-fan-gate-like-gate-facebook-iframe-tab-tutorial-with-php
How to check if a user likes my Facebook Page or URL using Facebook's API
Facebook how to check if user has liked page and show content?
Facebook Check if user "Liked" the page

Answer 2

A better approach to the problem can be:
// to generate user access token after the user is logged in
$USER_ACCESS_TOKEN = $facebook->getExtendedAccessToken();
$isFan = curl("https://api.facebook.com/method/pages.isFan?format=json&access_token=" . $USER_ACCESS_TOKEN . "&page_id=" . $FACEBOOK_PAGE_ID);
function curl($url) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}

Answer 3

require 'facebook.php';
$app_id = "your app id";
$app_secret = "your app secret";
$facebook = new Facebook(array(
'appId' => $app_id,
'secret' => $app_secret,
'cookie' => true,
));
$signed_request = $facebook->getSignedRequest();
$like_status = $signed_request["app"]["liked"];
if ($like_status == 1){
echo 'User likes this page';
}
else{
echo 'User doesn\'t like this page';
}
Maybe you should try somethng like this, check Facebook's PHP SDK reference page for the exact approach.