Simple library to assist in getting the Facebook Fan Page Id

facebookHelper.php

<?php
/**
 * A simple library to assist in getting the Facebook Fan Page Id
 * @author      Paras Nath Chaudhary
 * @copyright   CopyLeft (ↄ) 2013, writephp.blogspot.com
 * @license     GPL
 * @since       Version 1.0
 * @version     1.0
 
 Implementation
 ================
 
<?php
require_once 'facebookHelper.php';
echo getPageId("http://www.facebook.com/nosklub");
?>
*/

function getPageId($fanpageUrl){
  $url=str_replace('www', 'graph', $fanpageUrl);
  $json = file_get_contents($url);
  $contents=json_decode($json);
  return $contents->id;
}

?>