I tried to get whether user liked or not for some specific fan page by using following three techniques. But, all of them didn't work and gives false value or empty array as a results.
Facebook SDK is well configured and work properly. So, I have no idea what the issue on this. Please can anyone give me some suggestion for this or how can I check Is user liked or not on some specific fan page on facebook.
1.
$likes = $facebook->api("/me/likes/<page_id>");
if( !empty($likes['data']) ) {
`$page_like_status = "I like!";`
} else {
`$page_like_status = "not a fan!";`
}
2.
$isFan = $facebook->api(array(
"method" => "pages.isFan",
"page_id" => <page_id>,
"uid" => <fb_user_id>
));
if($isFan === TRUE) $tt = "I'm a fan!";
3.
if($me) {
$youlikeit = $facebook->api(array(
"method" => "fql.query",
"query" => "select uid from page_fan where uid=me() and page_id=<page_id>"
));
}
$youlikeit = sizeof($youlikeit) == 1 ? true : false;
Related
I am trying to get a page access token starting out with just a users access token stored in my database and a page id. So far I have not been using the facebook.php instead just using php's curl_* functions. So far I can send posts to the page (with a hard coded page id) but I want to impersonate the page when doing so.
Can I do this easily without facebook.php, that would be nice as it might save me from feeling like I should rewrite what I've done so far. If not, then how would I get the page access token from the facebook object - remember so far at least I don't store user ids or page ids in my db, just user access tokens and of course my app id and secret.
I've been looking at the example for getting page access tokens but I find it not quite what I need as it gets a user object and in so doing seems to force the user to login to facebook each time, but I stored the user access token to avoid exactly that from happening.
Do I need more permissions than manage_page and publish_stream? I tried adding offline_access but it doesn't seem available anymore (roadmap mentions this).
here is some of my code from my most recent attempt which uses the facebook.php file:
// try using facebook.php
require_once 'src/facebook.php';
// Create our Application instance
$facebook = new Facebook(array(
'appId' => $FB_APP_ID, // $FB_APP_ID hardcoded earlier
'secret' => $FB_APP_SECRET, // $FB_APP_SECRET hardcoded earlier
));
$facebook->setAccessToken($FB_ACCESS_TOKEN );
//got user access token $FB_ACCESS_TOKEN from database
// Get User ID -- why?
$user = $facebook->getUser();
//------ get PAGE access token
$attachment_1 = array(
'access_token' => $FB_ACCESS_TOKEN
);
$result = $facebook->api("/me/accounts", $attachment_1);
foreach($result["data"] as $page) {
if($page["id"] == $page_id) {// $page_id hardcoded earlier
$page_access_token = $page["access_token"];
break;
}
}
echo '<br/>'.__FILE__.' '.__FUNCTION__.' '.__LINE__.' $result= ' ;
var_dump($result); //this prints: array(1) { ["data"]=> array(0) { } }
$facebook->setAccessToken($page_access_token );
// Get User ID, why - re-init with new token maybe?
$user = $facebook->getUser();
//------ write to page wall
try {
$attachment = array(
'access_token' => $page_access_token,
'link' => $postLink,
'message'=> $postMessage
);
$result = $facebook->api('/me/feed','POST', $attachment);
echo '<br/>'.__FILE__.' '.__FUNCTION__.' '.__LINE__.' $result= ' ;
var_dump($result);
} catch(Exception $e) {
echo '<br/>'.__FILE__.' '.__FUNCTION__.' '.__LINE__.' $e= ' ;
var_dump($e); /*this gives : "An active access token must
be used to query information about the
current user." */
}
die;
Thanks
PS: I hardcoded the user id and started calling
$result = $facebook->api("/$user_id/accounts", $attachment_1);
and I still get an empty result.
PPS: The Graph API Explorer does not show my fan pages either even though my account is set as the Manager. My attempts to post work but show as being from my account rather than from the page.
PPPS: made a little progress by adding permissions on the graph explorer page to get an access token that way but that doesn't help as I need to the the access token programmatically. When a user with many fan pages logs in to my site I want to show them the list of their facebook fan pages to choose from. In practice aren't the permissions just granted on the app?
PPPPS: the list of permissions on my app now stands at : email, user_about_me, publish_actions
and
Extended Permissions:
manage_pages, publish_stream, create_note, status_update, share_item
do I need more? when I try now I still fail to get anything from the call to:
$facebook->api("/$user_id/accounts", $attachment_1);
Px5S: DOH!!! I see now that I was neglecting to add the manage_pages permissions to my call for a user access token when my scripts first get one and store it in the DB. But when I reuse that new access token I still get the error : "An active access token must be used to query information about the current user." So, can't such tokens be reused? Aren't they long term? will read more stuff...
Here is my functioning code, still messy but seems to work, note the scopes on the first $dialog_url, and please feel free to mock my code or even suggest improvements :
function doWallPost($postName='',$postMessage='',$postLink='',$postCaption='',$postDescription=''){
global $FB_APP_ID, $FB_APP_SECRET;
$APP_RETURN_URL=((substr($_SERVER['SERVER_PROTOCOL'],0,4)=="HTTP")?"http://":"https://").$_SERVER['HTTP_HOST'].$_SERVER['SCRIPT_NAME'].'?returnurl=1';
$code = $_REQUEST["code"];
$FB_ACCESS_TOKEN = getFaceBookAccessToken( );
$FB_ACCESS_TOKEN_OLD = $FB_ACCESS_TOKEN;
//if no code ot facebook access token get one
if( empty($code) && empty($FB_ACCESS_TOKEN) && $_REQUEST["returnurl"] != '1')
{
// if( $_REQUEST["returnurl"] == '1') die;
$dialog_url = "http://www.facebook.com/dialog/oauth?client_id=".$FB_APP_ID."&redirect_uri=".$APP_RETURN_URL."&scope=publish_stream,manage_pages";
header("Location:$dialog_url");
}
if( empty($FB_ACCESS_TOKEN) ){
if($_REQUEST['error_code'] == '200'){
return null;
}else if (!empty($code)){
$token_url = "https://graph.facebook.com/oauth/access_token?client_id=".$FB_APP_ID."&redirect_uri=".urlencode($APP_RETURN_URL)."&client_secret=".$FB_APP_SECRET."&code=".$code;
$access_token = file_get_contents($token_url);
$param1=explode("&",$access_token);
$param2=explode("=",$param1[0]);
$FB_ACCESS_TOKEN=$param2[1];
}else{
return null;
}
}
if(!empty($FB_ACCESS_TOKEN) && $FB_ACCESS_TOKEN_OLD != $FB_ACCESS_TOKEN) {
setFaceBookAccessToken( $FB_ACCESS_TOKEN);
}
$_SESSION['FB_ACCESS_TOKEN'] = $FB_ACCESS_TOKEN;
$page_name = '';
$page_id = getFaceBookPageId(); //from db
if(empty($page_id ) ) return null;
//in case there are multiple page_ids separated by commas
if(stripos($page_id, ',') !== false ){
$page_ids = explode(',', $page_id) ;// = substr($page_id, 0, stripos($page_id, ','));
}
$result = null;
foreach($page_ids as $page_id){
$page_id = trim($page_id);
if( !empty($FB_ACCESS_TOKEN)){
//get page_id
require_once 'src/facebook.php';
// Create our Application instance (replace this with your appId and secret).
$facebook = new Facebook(array(
'appId' => $FB_APP_ID,
'secret' => $FB_APP_SECRET
));
$facebook->setAccessToken($FB_ACCESS_TOKEN );
//------ get PAGE access token
$page_access_token ='';
$attachment_1 = array(
'access_token' => $FB_ACCESS_TOKEN
);
$result = $facebook->api("/me/accounts", $attachment_1);
if(count($result["data"])==0) {
return null;
}
foreach($result["data"] as $page) {
if($page["id"] == $page_id) {
$page_access_token = $page["access_token"];
break;
}
}
//------ write to page wall
try {
$attachment = array(
'access_token' => $page_access_token,
'link' => $postLink,
'message'=> $postMessage
);
$result = $facebook->api('/me/feed','POST', $attachment);
} catch(Exception $e) {
return null;
}
} //end if( !empty($FB_ACCESS_TOKEN))
}//end foreach
return $result; }
Now, I wonder if I can send the same message to several pages at once ...
Yup, just by looping over the ids, see above, it now supports multiple page ids.
And unless someone wants to contribute to the code - there's lots of ways it can be improved - I'm done.
I'm developing an iFrame Canvas application for Facebook using CakePHP, its Auth component, WebTechNick's Facebook plugin and OAuth for canvas pages (I've enabled this in the Facebook Developer app options). I would like users to be able to use the application after adding it to their profile (by requesting email and publish_stream permissions) by visiting http://apps.facebook.com/myapp/ or as a tab in their profile.
Requesting permissions is not the problem. The user is redirected to the permissions request page and then redirected to a callback method which requests an access_token, as per this tutorial.
After this callback the user is redirected back to http://apps.facebook.com/myapp/ which shows their personal index page. This is also where the problems start. As soon as the aforementioned URI is loaded, the browser asks for a form resubmission, this happens every time I reload http://apps.facebook.com/myapp/. This is the case because Facebook wants to pass the (expected) signed_request parameter and I'm wondering what to do with it. It's not an empty variable, so do I need another validation method or redirect, perhaps?
How should I handle the procedure for the signed_request parameter and, more importantly how to get rid of this form resubmission dialog?
Some of my methods, they might be a bit of a mess due to all the experimentation of the past day.
beforeFilter, login and callback methods, in my UserController.php:
function beforeFilter() {
parent::beforeFilter();
if (empty($this->permissions)) {
$this->Auth->allow('login', 'logout', 'callback');
}
}
function login() {
$session = $this->facebook->getSession();
$login_url = 'https://graph.facebook.com/oauth/authorize?client_id=' . FACEBOOK_APP_ID . '&redirect_uri=' . MY_APP_URL . '/users/callback/&type=user_agent&&display=page&scope=' . FACEBOOK_APP_PERMISSIONS;
if($session){
try {
$uid = $facebook_client->getUser();
$me = $facebook_client->api('/me', $params);
print($me);
} catch (FacebookApiException $e) {
error_log($e);
}
} else {
$this->set('authorise', true);
$script = '$(document).ready(function() { facebookRequestPermissions("'.$login_url.'");});';
$this->set('script', $script);
}
}
function callback() {
function callFb($url, $params) {
$ch = curl_init();
curl_setopt_array($ch, array(
CURLOPT_URL => $url,
CURLOPT_POSTFIELDS => http_build_query($params),
CURLOPT_RETURNTRANSFER => true,
CURLOPT_VERBOSE => true
));
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
$params=array('client_id'=>FACEBOOK_APP_ID, 'type'=>'client_cred', 'client_secret'=>FACEBOOK_APP_SECRET);
$url = "https://graph.facebook.com/oauth/access_token";
$access_token = callFb($url, $params);
$access_token = substr($access_token, strpos($access_token, "=")+1, strlen($access_token));
if ($access_token) {
$this->redirect(FACEBOOK_APP_URL);
} else {
echo 'An error has occurred';
}
}
The JavaScript in the login method refers to this jQuery function, the Facebook JavaScript SDK is initialised in $(document).ready():
function facebookRequestPermissions(login_url) {
FB.getLoginStatus(function(response) {
if (response.status !== 'unknown') {
top.location.href=login_url;
}
});
}
The JavaScript function should only fire when a user is logged in, if not, a different landing page is shown.
I use some methods in an overall AppControler:
class AppController extends Controller {
var $components = array('RequestHandler', 'Session', 'Auth', 'Facebook.Connect');
var $helpers = array('Form', 'Time','Html','Javascript', 'Session', 'Facebook.Facebook');
protected $facebook;
protected $permissions;
private $user;
function beforeRender() {
//Save the username if it isn't already present
if ((int)$this->Auth->user('id') != '' && (string)$this->Auth->user('username') == '') {
$data = array('id' => (int)$this->Auth->user('id'), 'username' => (string)$this->user['username']);
$this->loadModel('User');
$this->User->save($data);
}
if (!empty($this->user) && !empty($this->permissions)) {
$this->set('currentUser', $this->Auth->user());
}
}
function beforeFilter() {
$this->Auth->autoRedirect = false;
$this->Auth->loginAction = array('controller' => 'users', 'action' => 'login');
$this->Auth->loginRedirect = array('controller' => 'users', 'action' => 'index');
$this->Auth->logoutRedirect = array('controller' => 'users', 'action' => 'login');
App::import('Lib', 'Facebook.FB');
$this->facebook = new FB();
$this->user = $this->facebook->api('/me');
$this->permissions = $this->facebook->api('/me/permissions');
}
}
EDIT:
This only seems an issue with Firefox. Chrome doesn't display the dialog, but instead does a silent refresh after which the signed_request parameter is empty, strangely enough. This isn't the case with Firefox, where the signed_request parameter remains the same after every prompted refresh (unless the iFrame content is cached), which is looping infinitely, it seems.
EDIT 2:
Still struggling with this, but I ended up disabling the OAuth 2.0 for Canvas option in the Facebook Developer application, which has resolved the form resubmission issue. Of course this is not a real solution, because OAuth 2.0 is becoming mandatory for canvas application on Facebook, I believe.
Since I can't test the whole thing I am not sure if this is right, but on the first sight your JavaScript function looks strange to me. It looks like you always redirect to the login url, although the user gave permission.
Refering to Facebook JavaScript SDK, the function should look like this:
function facebookRequestPermissions(login_url) {
FB.getLoginStatus(function(response) {
if (!response.session) {
top.location.href=login_url;
}
});
}
or, if you want to call .status:
if (response.status == 'unknown')
About your question concerning the signed_request: it is used to get some information, look at Authentication - Signed Request to see what exactly. You don't need another validation method.
I'm using the Facebook Graph API and want to check if a user has authenticated my Facebook app by user ID. How do I do this?
You use:
SELECT is_app_user FROM user WHERE uid=USER_ID
This should return:
[
{
"is_app_user": true
}
]
If the user has logged in to your application.
Expanding on ifaour's answer, in PHP this query would look something like this:
<?php
$facebook = new Facebook(
'appID' => YOUR_APP_ID,
'secret' => YOUR_APP_SECRET
);
$result = $facebook->api(array(
'method' => 'fql.query',
'query' => "SELECT is_app_user FROM user WHERE uid=$user_id"
));
$is_installed = $result[0]['is_app_user'];
Here you can batch multiple requests together and avoid using FQL.
Assuming you have already logged into facebook and set the access token to the application access token, you can do this:
$batch = array();
foreach($friendArray AS $friend) {
$batch[] = array(
'method' => 'GET',
'relative_url' => '/' . $friend . '?fields=installed'
);
}
FB()->useApplicationAccessToken();
$batchResponse = FB()->facebook()->api('?batch='.json_encode($batch), 'POST');
Then you can process the batch response with code like this:
$installedUsers = array();
$notInstalledUsers = array();
foreach ($batchResponse AS $response) {
$body = json_decode($response['body'], true);
if (!isset($body['id']))
continue;
$id = $body['id'];
if (isset($body['installed']))
$installedUsers[] = $id;
else
$notInstalledUsers[] = $id;
}
Is there anyway to retrieve photos ordered by the number of likes in FQL?
PLEASE NOTE: I have never played with FQL before, but I need this exact solution yesterday, so I gave it a go!
Try adding references to "like_info" in the first line in the previous answer (maybe like_info is new since you asked this?):
$fql = "SELECT like_info, object_id,src_small,link FROM photo WHERE aid = '2389563453799923709' ORDER BY like_info created DESC";
$param = array(
'method' => 'fql.query',
'query' => $fql,
'callback' => ''
);
$photos = $facebook->api($param);
This may well give you answers returned in order from most to least liked. At least, it worked for me! :)
Please note: This solution is no longer require as like_info has been added to photo
So, I'm guessing this is impossible to do nicely? Here's the ugly solution:
$fql = "SELECT object_id,src_small,link FROM photo WHERE aid = '2389563453799923709' ORDER BY created DESC";
$param = array(
'method' => 'fql.query',
'query' => $fql,
'callback' => ''
);
$photos = $facebook->api($param);
if (count($photos) > 0) {
for ($i = 0; $i < count($photos); $i++) {
$objectId = $photos[$i]['object_id'];
$like_count = $facebook->api('/'.$objectId.'/likes');
$photos[$i]['likes'] = count($like_count['data']);
}
}
function cmp($a, $b) {
if ($a['likes'] == $b['likes'])
return 0;
return $a['likes'] > $b['likes'] ? -1 : 1;
}
usort($photos, 'cmp');
How can I get all the Events a Page have created?
I've tried the following:
https://graph.facebook.com/PAGEID/events
But I don't get any data back.
Can someone help me?
I've run in to the same issue and also updated the bug mentioned by ivan.abragimovich.
I'm not proud of it, but here is what I did as a work around.
$accessToken = "..."; // your OAuth token
$uid = "..."; // the id of the page you are using
$feed = $this->facebook->api("/$uid/feed", "GET", array('access_token' => $accessToken,
'limit' => 20));
// temp method of retrieving events until the page events bug is fixed.
// #see http://bugs.developers.facebook.com/show_bug.cgi?id=10399
if (array_key_exists('data', $feed) && is_array($feed['data']))
{
foreach($feed['data'] as $item)
{
if ($item['type'] == "link" && strpos($item['link'], "eid=") !== false)
{
preg_match('/eid=(\d+)/', $item['link'], $urlMatches);
if (count($urlMatches) == 2)
{
$eventId = $urlMatches[1];
$event = $this->facebook->api("/$eventId", 'GET', array('access_token' => $accessToken));
print_r($event);
}
}
}
}
Are you sure there are events that are associated with the Page? You might want to check if you can retrieve the feed. Just swap "events" with "feed" in the URL.