APP authentication on facebook with PHP SDK

Question

I have a problem with authenticating my Facebook APP with a Link generated through the Facebook PHP SKD:

when I click the link, an error appears on facebook (An error occurred. Please try again later.) and I won't get redirected to the "app login page".

https://www.facebook.com/dialog/oauth?redirect_uri=http%3A%2F%2Fxxx.test.net%2Fstart.php&state=8d0ea10xxxxxxx290be6c654f02xxxa&scope=user_likes

This is the code of the index.php:

<?php
  require_once("./fbsdk/facebook.php");
//test.net
  $config = array();
  $config[‘appId’] = '37353621936xxxx'; 
  $config[‘secret’] = 'fd39e0f0861f2bdae4fc79274749xxxx';
  $config[‘fileUpload’] = false; // optional

  $facebook = new Facebook($config);

?>
<!DOCTYPE html>
<html>
<head>
<title>
FB-DEV-TEST
</title>

</head>
<body>


<?php

$params = array(
  'scope' => 'user_likes',
  'redirect_uri' => 'http://xxx.test.net/start.php'
);

$loginUrl = $facebook->getLoginUrl($params);

echo "<a href=\"$loginUrl\">Login</a>";

?>


</body>
</html>

I've already read this post, but I still can't figure out the problem... are there any changes I have to do at the Facebook APP center, before I can login? Thanx for your help & sry, for my bad english! :)

Try adding `'show_error' => true` to your parameters – that should give you a more detailed error description. — CBroe, Jul 17 '12 at 12:54
@CBroe, to what function call exactly? I've never read about *this* parameter? — ifaour, Jul 17 '12 at 13:00
To your $params array, that you use to build the login URL. https://developers.facebook.com/docs/reference/dialogs/, “Common Dialog Parameters” — CBroe, Jul 17 '12 at 13:29

score 0 · Answer 1 · answered Jul 17 '12 at 13:39

0

Check if your redirect_url domain matches the "Site URL:" in App settings on developers.facebook.com.

answered Jul 17 '12 at 13:39

egis

1,404
2
11
24

score 0 · Answer 2 · answered Jul 19 '12 at 08:50

A few checklists that I can think of:

Make sure your Facebook app is not in sandbox mode (unless you are already signed in to your Facebook account before clicking on the login link)
At https://developers.facebook.com/apps/:
"Website with Facebook Login" must be checked, but for "Site URL", you can enter any landing URL.
Also at https://developers.facebook.com/apps/:
Make sure that your site domain is entered under App Domains.

Alternatively, you may want to check out Opauth, an authentication framework for PHP that handles these for you.

APP authentication on facebook with PHP SDK

2 Answers2