How to check if a user likes my Facebook Page or URL using Facebook s API

Question

I think I m going crazy  I can t get it to work  I simply want to check if a user has liked my page with javascript in an iFrame app   FB api       method       pages isFan       page id         my page id      function response            console log response           if response               alert  You Likey              else               alert  You not Likey                            This returns  False But I m a fan of my page so shouldn t it return true

User · Accepted Answer

I tore my hair out over this one too  Your code only works if the user has granted an extended permission for that which is not ideal   Here s another approach   In a nutshell  if you turn on the OAuth 2 0 for Canvas advanced option  Facebook will send a   REQUEST  signed request   along with every page requested within your tab app  If you parse that signed request you can get some info about the user including if they ve liked the page or not   function parsePageSignedRequest         if  isset   REQUEST  signed request              encoded sig   null         payload   null        list  encoded sig   payload    explode        REQUEST  signed request    2          sig   base64 decode strtr  encoded sig   -                   data   json decode base64 decode strtr  payload   -           true          return  data            return false        if  signed request   parsePageSignedRequest          if  signed request- gt page- gt liked          echo  This content is for Fans only          else         echo  Please click on the Like button to view this tab

User · Answer

You can do it in JavaScript like so  Building off of  dwarfy s response to a similar question     lt html gt     lt head gt       lt script type  text javascript  src  https   ajax googleapis com ajax libs jquery 1 7 1 jquery min js  gt  lt  script gt       lt style type  text css  gt        div container notlike  div container like           display  none               lt  style gt     lt  head gt     lt body gt       lt div id  fb-root  gt  lt  div gt       lt script gt        window fbAsyncInit   function             FB init             appId         YOUR APP ID      App ID           channelUrl    http s    YOUR APP DOMAIN channel html      Channel File           status       true     check login status           cookie       true     enable cookies to allow the server to access the session           xfbml        true     parse XFBML                      FB getLoginStatus function response              var page id    YOUR PAGE ID             if  response  amp  amp  response authResponse                var user id   response authResponse userID              var fql query    SELECT uid FROM page fan WHERE page id     page id  and uid   user id              FB Data query fql query  wait function rows                  if  rows length    1  amp  amp  rows 0  uid    user id                    console log  LIKE                        container like   show                    else                   console log  NO LIKEY                        container notlike   show                                                else               FB login function response                  if  response  amp  amp  response authResponse                    var user id   response authResponse userID                  var fql query    SELECT uid FROM page fan WHERE page id     page id  and uid   user id                  FB Data query fql query  wait function rows                      if  rows length    1  amp  amp  rows 0  uid    user id                        console log  LIKE                            container like   show                        else                       console log  NO LIKEY                            container notlike   show                                                            else                   console log  NO LIKEY                        container notlike   show                                    scope   user likes                                                Load the SDK Asynchronously        function d           var js  id    facebook-jssdk   if  d getElementById id    return           js   d createElement  script    js id   id  js async   true          js src      connect facebook net en US all js           d getElementsByTagName  head   0  appendChild js           document         lt  script gt        lt div id  container notlike  gt        YOU DON T LIKE ME         lt  div gt        lt div id  container like  gt        YOU LIKE ME         lt  div gt      lt  body gt   lt  html gt    Where the channel html file on your server just contains the line     lt script src    connect facebook net en US all js  gt  lt  script gt    There is a little code duplication in there  but you get the idea  This will pop up a login dialog the first time the user visits the page  which isn t exactly ideal  but works   On subsequent visits nothing should pop up though

User · Answer

You can use  PHP    isFan   file get contents  https   api facebook com method pages isFan format json amp access token     USER TOKEN     amp page id     FB FANPAGE ID     That will return one of three    string true string false json formatted response of error if token or page id are not valid   I guess the only not-using-token way to achieve this is with the signed request Jason Siffring just posted  My helper using PHP SDK   function isFan        global  facebook       request    facebook- gt getSignedRequest        return  request  page    liked

User · Answer

Though this post has been here for quite a while  the solutions are not pure JS  Though Jason noted that requesting permissions is not ideal  I consider it a good thing since the user can reject it explicitly  I still post this code  though  almost  the same thing can also be seen in another post by ifaour  Consider this the JS only version without too much attention to detail    The basic code is rather simple   FB api  me likes SOME ID   function response        if   response data length     1       there should only be a single value inside  data          console log  You like it          else           console log  You don t like it                ALternatively  replace me with the proper UserID of someone else  you might need to alter the permissions below to do this  like friends likes  As noted  you need more than the basic permission   FB login function response          do whatever you need to do after a  un successfull login               scope   user likes

User · Answer

i use jquery to send the data when the user press the like button    lt script gt    window fbAsyncInit   function         FB init  appId   xxxxxxxxxxxxx   status  true  cookie  true               xfbml  true                      FB Event subscribe  edge create   function href  widget      document  ready function       var h fbl href split       var fbl id  h fbl 4         post  http   xxxxxx com inc like php    idfb fbl id rand Math random                      lt  script gt    Note you can use some hidden input text to get the id of your button in my case i take it from the url itself in   var fbl id h fbl 4    becasue there is the id example  url  http   mywebsite com post 22 some-tittle  so i parse the url to get the id and then insert it to my databse in the like php file  in this way you dont need to ask for permissions to know if some one press the like button  but if you whant to know who press it  permissions are needed

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