I have been testing the Facebook php sdk. I am able to search for pages & places but not groups. According to the documentation, this should return groups...
https://graph.facebook.com/search?q=programming&type=group
The below code works. If I change the type from "page" to "group", the code fails. I do not get an exception:
$query = urlencode('Harlem');
$type = 'page';
$results = $facebook->api('/search?q='.$query.'&type='.$type);
It depends on what kind of Access Token you're using. As of https://developers.facebook.com/docs/reference/api/search/#access_tokens searches for pages require an App Access Token, whereas searches for Groups require an User Access Token. Please check accordingly.