ช่วยด้วยคับ.....หน้า index โดนแฮก ขึ้นข้อความว่า "เสียใจด้วยครับ ไม่มีหน้าที่ท่านต้องการเข้าชม..."รบกวนผู้รู้ด้วยนะคับบบบบบบบ

<?php
$time = microtime(TRUE);
define('TIME_LOADER', $time);
$mem = memory_get_usage();

define( '_MAXSITE', 1 );
define('BASE_PATH', dirname(__FILE__) );
define( 'DS', DIRECTORY_SEPARATOR );
define( 'MAXSITE_VERSION', '2.5.3' );

session_start();


if ( !file_exists( 'includes/config.in.php' ) || filesize( 'includes/config.in.php' ) < 9.00 ) {
    header( 'Location: install/index.php' );
    exit();
}

/* Installation sub folder check, removed for work with CVS */
if (file_exists( 'install/index.php' )) {
    include ('offline.php');
    exit();
}

$_SERVER['PHP_SELF'] = "index.php";
$PHP_SELF = $_SERVER['PHP_SELF'];
$name       = empty($_GET['name']) ? "" : $_GET['name'];
$file       = empty($_GET['file']) ? "" : $_GET['file'];
$admin_user = empty($_SESSION['admin_user']) ? "" : $_SESSION['admin_user'];
$admin_pwd  = empty($_SESSION['admin_pwd']) ? "" : $_SESSION['admin_pwd'];
$login_true = empty($_SESSION['login_true']) ? "" : $_SESSION['login_true'];
$op         = empty($_GET['op']) ? "" : $_GET['op'];
$action     = empty($_GET['action']) ? "" : $_GET['action'];
$page       = empty($_GET['page']) ? "" : $_GET['page'];
$category   = empty($_GET['category']) ? "" : $_GET['category'];

require_once("mainfile.php");
GETMODULE($name, $file);

// Make sure you're using correct paths here
require_once("modules/useronline/counter.php");

// Calling TEMPLATE
require_once("templates/".WEB_TEMPLATES."/function.php");
require_once( 'templates/'.WEB_TEMPLATES.'/index.php' );