gistfile1.aw

<?php

$facebook = new Facebook(array('appId'  => 'YOUR_APP_ID', 'secret' => 'YOUR_APP_SECRET'));

$note = array(
  'subject' => 'Your new Note!',
  'message' => '<h1>Your new Note</h1><p>This is your new note</p>',
);

$response = $facebook->api('/YOUR_USER_OR_PAGE_ID/notes', 'post', $note);
$response = json_decode($response);

echo 'your note has the id #'.$response['id'];