Pages are the same as profiles, in terms of access to them, although the schedule. To receive messages on the wall from the page, you use the url https://graph.facebook.com/PAGE_ID/feed .
Adding a limit parameter will only return the last: https://graph.facebook.com/PAGE_ID/feed?limit=1 .
Here is a quick and dirty example of how this will work in PHP:
try { $feed = $facebook->api('/PAGE_ID/feed?limit=1'); } catch (FacebookApiException $e) { error_log($e); }
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