Question

I get this error:

API Error Code: 100 API Error Description: Invalid parameter Error
Message: next is not owned by the application.

in this index.php file:

<
?php
$appapikey = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';
$appsecret = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';

require_once 'facebook.php';

$facebook = new Facebook ($appapikey, $appsecret);

$user = $facebook->require_login();

echo $user;
?>

Answer 1

In the developers section, under your website, go to:

Settings > Web Site >

Site URL: http://example.com
Site Domain: example.com

This error can occur if your domain is listed as http://example.com but you are coming from http://www.example.com. The Site Domain ensures that the subdomain www gets recognized properly.