I'm using the wordpress plugin from http://www.sociable.es/facebook-wordpress-plugin-3-0/ on my blog, and I try to figure out, how they hide their download till I click the "Like" button on the post.
I tried:
<fb:fbml version="1.1">
<fb:visible-to-connection>HIDDEN CONTENT</fb:visible-to-connection>
</fb:fbml>
But it didn't work.
Is there a way with the Javascript SDK or any other solution?
Thanks a lot!
I think FBML has been done away with. Found this bit of code:
$request = $_REQUEST["signed_request"];
list($encoded_sig, $load) = explode('.', $request, 2);
$fbData = json_decode(base64_decode(strtr($load, '-_', '+/')), true);
if (!empty($fbData["page"]["liked"]))
{ ?>
You are a fan
<?php } else { ?>
You are not a fan
<?php }
//print_r($_REQUEST);
?>
However, the request variables are not being picked up by my iFrame.
Will update as i figure it out.
NB - would only works for the first time the user likes the page. you'd have to then save the session variable or something.
Here's a ready solution for Wordpress:
Like 2 Unlock for Wordpress
Related
I have used the following code, and still use in older apps that I have created in Facebook, to hide content from users until they like the Fan page the app resideds on in a tab.
$request = $_REQUEST["signed_request"];
list($encoded_sig, $load) = explode('.', $request, 2);
$fbData = json_decode(base64_decode(strtr($load, '-_', '+/')), true);
if (!empty($fbData["page"]["liked"]))
{
//Show Content
}else{
//Hide Content
}
However when i come to use this code now, It does not work. Doe's anyone know why this still works in my older apps, but will not work when I create newer apps?
Thanks
The code does still work. It was an issue with the settings of the app, specifically the URL structure I had used.
I know there are many Q&A on here about this but I can't seem to make sense of them because they don't show full code examples or are for doing something different than what I'm trying to do.
I have a simple facebook welcome-test tab. Not a canvas app. I want to be able to get the users id but have to make it prompt them for access to that info before it will show up in the signed request.
So what I'm looking for is a code example for a simple welcome tab. I don't need a login page or anything like that since this will be in the fan content page so they will have to be logged in already. I just want that dialog box to popup asking them for permission so I can get the userid.
Thanks
Edit:
I wanted to add that I just figured out my problem but it's not really an answer to this question. I figured out how to get the user id without asking the user for permission to access their profile. It was as easy as adding this code to the page and it works in a tab and canvas app the same way. getUser() by its self returns 0 but since the user is already logged in to be seeing this content, when getUser() returns 0, then the code simply gets the user id from the API method. Now that I finally figured this out it seems simple.
$session = $facebook->getUser();
if (!$session) {
$url = $facebook->getLoginUrl(array(
'canvas' => 1,
'fbconnect' => 0
));
echo "<script type='text/javascript'>top.location.href = '$url';</script>";
} else {
try {
$uid = $facebook->getUser();
$me = $facebook->api('/me');
$updated = date("l, F j, Y", strtotime($me['updated_time']));
echo "Hello " . $me['name'] . "<br />";
echo "You last updated your profile on " . $updated;
} catch (FacebookApiException $e) {
echo "Error:" . print_r($e, true);
}
}
I'd still like to know if there is a way to make the extended permissions dialog show for a tab app so it will be good to see solutions for php sdk.
you need to prompt them for allowing your application to pull data on the user
this can be done using the JS SDK's function FB.login(). you can have more details in the facebook documentation : http://developers.facebook.com/docs/reference/javascript/FB.login/
notice that the popup can be opened only on mouseclick or keyup events - otherwise popup blockers will block it.
you will also have to set a domain and site url to the application in the developers site, and init the facebook js library (the loading paragraph in - http://developers.facebook.com/docs/reference/javascript/)
<div onclick="login();">click here to login</div>
<script type="text/javascript">
function afterLogin(){
alert("user logged");
}
function login(){
FB.getLoginStatus(function(response){
if(response.status=="connected")
{
afterLogin();
} else {
FB.login(function(response){
if(response.status=="connected")
{
afterLogin();
}
});
}
});
}
</script>
I don't think facebook allows this... Facebook does not want a user's tab to be able to detect who is looking at it, and possibly displaying information to a user's friends that isn't displayed to the user.
I can be wrong :)
I have created a Page Tab Facebook App where I want to display different content depending on the user being a fan or not. (Also called fan gate, landing page or reveal page)
For this I'm using the PHP SDK, in specific the following code:
<?php
require 'src/facebook.php';
$facebook = new Facebook(array(
'appId' => 'APP_ID',
'secret' => 'APP_SECRET',
'cookie' => true,
));
?>
And in the content:
<?php
$signed_request = $_REQUEST["signed_request"];
list($encoded_sig, $payload) = explode('.', $signed_request, 2);
$data = json_decode(base64_decode(strtr($payload, '-_', '+/')), true);
if (empty($data["page"]["liked"])) {?>
Thank you for liking our Page!
<?php } else { ?>
You haven't liked our page yet..
<?php };
// Debugging Code
echo "REQUEST:<br>";
print_r($_REQUEST);
echo "<br>GET:<br>";
print_r($_GET);
echo "<br>POST:<br>";
print_r($_POST);
?>
This works when I'm logged in with my Facebook User and when I use it on my own Page.
Meaning the signed_request is present in both $_POST and $_REQUEST.
However, when I test it with another user, there is no signed_request value in those variables..
Notes:
- I already took a look at my URL Settings in the App Configuration (300 Redirect and stuff) but this looks fine, and like I said with my User it's working..
- the signed_request is not just empty, it doesn't even exist.
Does anybody have similar issues?
I would not mind using the Javascript SDK instead of PHP if it works then, but I'm not very experienced in Javascript.
EDIT:
As i found out you always have to have a non-secure (http) and a secure (https) URL.
Even if you enter a secure URL as the standard URL, facebook will contact it using http and will then get redirected (depends on server configuration) to the https, which makes you lose your signed_request.
I just had a similar problem. In my case the problem was that in the app config i had not put a slash at the end of the tab URL which was referencing a directory (with an index.php in it). So i got a redirect to the same URL with a slash at the end and lost the $_POST this way.
signed_request is never passed via GET but POST. $_REQUEST contain data according to configuration in php.ini (request_order or variables_order)
Since you are using PHP-SDK it's better to use it for signed_request retrieval:
$signed_request = $facebook->getSignedRequest();
$liked = $signed_request['page']['liked'];
For applications running in Page Tab signed_request is always passed, so if you not get it ensure there is no redirections that omit POST data being passed.
I am making an application and on the "front" page of the Tab I get the signed_request. But when I navigate to different pages on the app it stops providing the data.
So far this work:
$signed_request = $facebook->getSignedRequest();<br />
$user_profile = $facebook->api('/me');<br />
echo $user_profile['id'];<br />
echo $user_profile['name'];
echo $_SESSION['signed_request']; // Returns the data
But when I navigate to other pages, it doesn't give anything.
It looses everything. How can I keep the data from the signed_request? Do I need to use sessions in some way?
I've found that the signed request isn't always passed to each page, so I used the following to hold that myself in the session object. I set this on the login page before I redirect to other pages in my app:
if (!isset($_SESSION["SR"]))
$_SESSION["SR"] = $_REQUEST["signed_request"];
$signed_request = $_SESSION["SR"];
Hope that helps.
I have a Facebook page that I created and I want to create a contest app that only likers can see. I was able to do this in the past using FBML but ever since Facebook has stopped using FBML, I can't seem to do this with IFrame apps. Can anyone help me out?
Thanks!
Well, we can give you guidance. You can either develop the whole thing yourself or use a pre-built product like the one provided by Strutta (not free!).
Now how to develop a contest system is up to you, but how to make it available only to fans is easy. You just need to read the signed_request, look for the page parameter and check if the liked field is set or not. This is how to do it in PHP:
<?php
$signed_request = $_REQUEST["signed_request"];
list($encoded_sig, $payload) = explode('.', $signed_request, 2);
$data = json_decode(base64_decode(strtr($payload, '-_', '+/')), true);
if (empty($data["page"]["liked"])) {
echo "You are not a fan!";
} else {
echo "Welcome back fan!";
}
?>
You may need to take a look at the Promotions Guidelines.