3.5今天2015年6月2号被攻击，如下代码

<?php
/**
* @Cscms 3.5 open source management system
* @copyright 2009-2013 chshcms.com. All rights reserved.
* @Author:Cheng Jie
* @Dtime:2013-04-27
*/
//搴旂敤鐜??
define('ENVIRONMENT', 'production');
if (defined('ENVIRONMENT')){
switch (ENVIRONMENT){
case 'development':error_reporting(E_ALL);break;
case 'testing':
case 'production':error_reporting(0);break;
default:exit('搴旂敤鐜??鐨勮?缃?笉姝ｇ‘銆?);
}
}
//鏂囦欢鍚嶇О
if (!defined('SELF')) {
define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));
}
// 缃戠珯鏍圭洰褰?
if (!defined('FCPATH')) {
define('FCPATH', str_replace(SELF, '', __FILE__));
}
//榛樿?鏃堕棿
date_default_timezone_set ("Asia/Shanghai");
$system_path = 'cscms';
$application_folder = 'app';
$cscms_folder = 'csdj';
if (defined('STDIN')){
chdir(dirname(__FILE__));
}
if (realpath($system_path) !== FALSE){
$system_path = realpath($system_path).'/';
}
$system_path = rtrim($system_path, '/').'/';
if ( ! is_dir($system_path)){
exit("鎶辨瓑锛岀郴缁熷搷搴旇秴鏃讹紝璇风◢鍚庡啀璇? ".pathinfo(__FILE__, PATHINFO_BASENAME));
}
define('EXT', '.php');
define('BASEPATH', str_replace("\", "/", $system_path));
define('SYSDIR', trim(strrchr(trim(BASEPATH, '/'), '/'), '/'));
define('PLUGINDIR',str_replace("\", "/", FCPATH) . 'plugins/');
if (is_dir($application_folder)){
define('APPPATH', $application_folder.'/');
}else{
if ( ! is_dir(BASEPATH.$application_folder.'/')){
exit("鎮ㄧ殑搴旂敤绋嬪簭鏂囦欢澶圭殑璺?緞涓嶆?纭??缃?