suddenly facebook connect stopped working - facebook

Question

A few days ago the facebook connection with our website stopped working all of the sudden, nothing was changed to the code???
Facebook made some changes???
http://www.presbium.sk/vstup-pre-uchadzacov/
require 'facebook-php-sdk/src/facebook.php';
$facebook = new Facebook(array(
'appId' => 'YOUR_APP_ID',
'secret' => 'YOUR_APP_SECRET',
));
// Get User ID
$user = $facebook->getUser();
if ($user) {
try {
// Proceed knowing you have a logged in user who's authenticated.
$user_profile = $facebook->api('/me');
} catch (FacebookApiException $e) {
error_log($e);
$user = null;
}
}
if ($user) {
$logoutUrl = $facebook->getLogoutUrl();
} else {
$loginUrl = $facebook->getLoginUrl();
}
enter code here

Answer 1

You can find everything you need there:
http://developers.facebook.com/docs/
For login:
http://developers.facebook.com/docs/authentication/
for Facebook Connect:
http://developers.facebook.com/docs/reference/api/
Facebook Login is not an official Facebook expression. The official term for this is Facebook Authentication. Facebook Connect was the expression used for the server to server technology, back when the Rest API was up to date. Now, you have to use the Graph API to do the same things. You can find the infos about the old Rest API here:
http://developers.facebook.com/docs/reference/rest/
But consider these APIs are deprecated and using them for a new development is probably not a good idea.

Answer 2

There are changes to Facebook's API implemented continuously. Some of them may break your app's functionality. A good way to stay-up-to-date about what changes are happening is to following the Operation Developer Love platform updates. There you can find out about bugs and breaking changes to the API. Go through the latest blog updates to see if there is a change you have missed to implement.
Edit:
You wrote:
I did everything as here github.com/facebook/facebook-php-sdk and befor 1 month it works but now it don´t working
The SDK github examples give you a blue print for a general case. The error is most likely something that's app specific, for example which permissions you ask for. I recommend you really go through all the 'breaking changes' in the blog for the past 3 months and see what it can be. For example, the 'offline access' permission was removed a while ago. If your app still asks for it, the apps expected behaviour may break. There are also new requirements for having a privacy policy that if not met may cut off the app's access to parts of the API. I'm not saying these are the source of issue with your app, they're just examples. Real examples.