Fatal error: Class 'google_sitemap' not found - php

Question

I use google codeigniter and i want use sitemap but get following error, how can fix it?
I get this class from here: http://codeigniter.com/wiki/Google_Sitemaps
Error:
Fatal error: Class 'google_sitemap' not found in
D:\xampp\htdocs\application\controllers\sitemap_google.php on line 13
This is full code in Controller in here: D:\xampp\htdocs\application\controllers\sitemap_google.php:
<?php
class Sitemap_google extends CI_Controller
{
function My_controller()
{
parent::Controller();
$this->load->helper(array('text','url'));
$this->load->plugin('google_sitemap'); //Load Plugin
}
function index()
{
$sitemap = new google_sitemap; //This is line 13
$item = new google_sitemap_item(base_url()."MY_WEBSITE_URL",date("Y-m-d"), 'weekly', '0.8' ); //Create a new Item
$sitemap->add_item($item); //Append the item to the sitemap object
$sitemap->build("./sitemap.xml"); //Build it...
//Let's compress it to gz
$data = implode("", file("./sitemap.xml"));
$gzdata = gzencode($data, 9);
$fp = fopen("./sitemap.xml.gz", "w");
fwrite($fp, $gzdata);
fclose($fp);
//Let's Ping google
$this->_pingGoogleSitemaps(base_url()."/sitemap.xml.gz");
}
function _pingGoogleSitemaps( $url_xml )
{
$status = 0;
$google = 'www.google.com';
if( $fp=#fsockopen($google, 80) )
{
$req = 'GET /webmasters/sitemaps/ping?sitemap=' .
urlencode( $url_xml ) . " HTTP/1.1\r\n" .
"Host: $google\r\n" .
"User-Agent: Mozilla/5.0 (compatible; " .
PHP_OS . ") PHP/" . PHP_VERSION . "\r\n" .
"Connection: Close\r\n\r\n";
fwrite( $fp, $req );
while( !feof($fp) )
{
if( #preg_match('~^HTTP/\d\.\d (\d+)~i', fgets($fp, 128), $m) )
{
$status = intval( $m[1] );
break;
}
}
fclose( $fp );
}
return( $status );
}
}

Answer 1

$this->load->plugin('google_sitemap'); //Load Plugin
You said:
I use last version of Codeigniter.
There are no more "plugins" in Codeigniter.
It looks like you're expecting at least two classes in one file: google_sitemap_item and google_sitemap. CI's loader doesn't play well with that (it expects one class per file), so don't even bother with the CI loader, just do a straight include:
include APPPATH.'path/to/file/google_sitemap.php');
You're also using the old PHP4 constructors, which suggests you're using an older version of CI (current is 2.1.0, you can check with echo CI_VERSION;). So, this:
function My_controller()
{
parent::Controller();
$this->load->helper(array('text','url'));
$this->load->plugin('google_sitemap'); //Load Plugin
}
Should be this:
function __construct()
{
parent::__construct();
$this->load->helper(array('text','url'));
include APPPATH.'path/to/file/google_sitemap.php');
}