Mail Benachrichtigung bei neuem Update

<?php
/*
Plugin Name: Mail On Update
Plugin URI: http://www.svenkubiak.de/mailonupdate
Description: Sends an E-Mail if a newer version of a plugin is available in the wordpress directory
Version: 1.0beta
Author: Sven Kubiak
Author URI: http://www.svenkubiak.de


Copyright 2008 Sven Kubiak


This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.


This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.


You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
global $wp_version;
define('MOUISWP23', version_compare($wp_version, '2.3', '>='));
define('RECIPIENT','MAIL AT DOMAIN PUNKT DE');


class MailOnUpdate {


    function mailonupdate()
    {
        //do not run if wordpress is too old
        if (!MOUISWP23)
            return;
            
        //load loanguage file
        //if (function_exists('load_plugin_textdomain'))
            //load_plugin_textdomain('mou', PLUGINDIR.'/mailonupdate');    
        
        if (!wp_next_scheduled('scheduledCheckUpdates'))
            wp_schedule_event( time(), 'hourly', 'scheduledCheckUpdates' );
                
        add_action('scheduledCheckUpdates', array(&$this, 'checkPluginUpdates'));    
    }


    function checkPluginUpdates()
    {
        global $wp_version;
        
        if ( !function_exists('fsockopen') )
            return false;


        $plugins = get_plugins();
        $active  = get_option( 'active_plugins' );
        $current = get_option( 'update_plugins' );


        $new_option = '';
        $new_option->last_checked = time();


        $plugin_changed = false;
        foreach ( $plugins as $file => $p ) {
            $new_option->checked[ $file ] = $p['Version'];


            if ( !isset( $current->checked[ $file ] ) ) {
                $plugin_changed = true;
                continue;
            }


            if ( strval($current->checked[ $file ]) !== strval($p['Version']) )
                $plugin_changed = true;
        }
        
        if (
        isset( $current->last_checked ) &&
        3600 > ( time() - $current->last_checked ) &&
        !$plugin_changed
        )
        return false;


        $to_send->plugins = $plugins;
        $to_send->active = $active;
        $send = serialize( $to_send );


        $request = 'plugins=' . urlencode( $send );
        $http_request  = "POST /plugins/update-check/1.0/ HTTP/1.0\r\n";
        $http_request .= "Host: api.wordpress.org\r\n";
        $http_request .= "Content-Type: application/x-www-form-urlencoded; charset=" . get_option('blog_charset') . "\r\n";
        $http_request .= "Content-Length: " . strlen($request) . "\r\n";
        $http_request .= 'User-Agent: WordPress/' . $wp_version . '; ' . get_bloginfo('url') . "\r\n";
        $http_request .= "\r\n";
        $http_request .= $request;        


        $response = '';
        if( false != ( $fs = @fsockopen( 'api.wordpress.org', 80, $errno, $errstr, 3) ) && is_resource($fs) ) {
            fwrite($fs, $http_request);


            while ( !feof($fs) )
                $response .= fgets($fs, 1160); // One TCP-IP packet
            fclose($fs);
            $response = explode("\r\n\r\n", $response, 2);
        }


        $response = unserialize( $response[1] );


        if ( $response )
            $new_option->response = $response;


        update_option( 'update_plugins', $new_option );    
        $current = get_option( 'update_plugins' );


        $message = '';


        foreach ( $current->response as $plugin_file => $update_data ) {
            if ( empty($update_data->package) ){
                $message .= __('Name:')." ".$plugins[$plugin]['Name']."\n";
                $message .= __('Version:')." ".$update_data->new_version."\n";    
                $message .= "\n\n";
            }
        }


        $this->sendMailNotification(RECIPIENT,__('New updates available','mou'),$message);
    }
    
    function sendMailNotification($recipient, $subject, $message)
    {
        //set body
        $body  = __('There are updates available for the following plugins:');
        $body .= "\n\n".$message;
        
        //set header
        $subject = '[' . get_bloginfo('name') . '] ' . $subject;
        $bloginfo = str_replace('"', "'", get_bloginfo('name'));
        $charset = get_settings('blog_charset');
        $headers  = "From: \"{$bloginfo}\" <noreply>\n";
        $headers .= "MIME-Version: 1.0\n";
        $headers .= "Content-Type: text/plain; charset=\"{$charset}\"\n";
    
        //send e-mail
        wp_mail($recipient, $subject, $body, $headers);
    }    
}
if (class_exists('MailOnUpate'))
    $mou = new MailOnUpdate();
?>