facebook oauth url problems - facebook

Question

I have the following code, which are working partly
<?php
require_once 'facebook.php';
$app_id = 'MY_APP_ID';
$app_secret = 'MY_APP_SECRET';
$app_url = 'http://mysite.com/index.php/';
$scope = 'user_about_me';
// Init the Facebook SDK
$facebook = new Facebook(array(
'appId' => $app_id,
'secret' => $app_secret,
'cookie' => true
));
// Get the current user
$user = $facebook->getUser();
// If the user has not installed the app, redirect them to the Auth Dialog
if (!$user) {
$loginUrl = $facebook->getLoginUrl(array(
'scope' => $scope,
'redirect_uri' => $app_url,
));
print('<script> top.location.href=\'' . $loginUrl . '\'</script>');
}
$user_profile = $facebook->api('/me');
echo "id: " . $user_profile['id'];
?>
I get the correct id printed out on this page, but on several other pages i go into the if(!$user).
But there is an error in the oauth url:
API Error Code: 191
API Error Description: The specified URL is not owned by the application
Error Message: Invalid redirect_uri: Given URL is not allowed by the Application configuration.
I have found similar problems here on stackoverflow, but can't seem to fix it :/
Under my settings I have the same url and $app_url
Website with facebook -> site url -> https://www.facebook.com/pages/myappname/373671679372127/
EDIT: I edit my app_url, so it is now the same as my canvas url under app settings: http://mysite.com/index.php/
Now I don't get an error. I just get a blank window :(
EDIT: Importent to clear cookies once a while when testing. Else some very random errors somewhere

Answer 1

Check if you set the correct URL for "Website with Facebook Login" in the dev settings. This cannot be a page on facebook.com, it has to be a Link to YOUR domain.
Also, i would enclose the last 2 rows of your code in an "else" block. And the JavaScript code is wrong. This would be correct:
print('<script> top.location.href="' . $loginUrl . '";</script>');
(easier to understand with double quotes, you missed a semicolon. even if it´s not always needed, you better use it)
Try this code:
$user = $facebook->getUser();
// If the user has not installed the app, redirect them to the Auth Dialog
if (!$user) {
$loginUrl = $facebook->getLoginUrl(array(
'scope' => $scope,
'redirect_uri' => $app_url,
));
print('<script> top.location.href=\'' . $loginUrl . '\';</script>');
}
else {
echo 'User ID: ' . $user;
}
Also, get rid of the Slash after "index.php". That´s not i folder (i hope/guess).