Use the latest version of PHPstudy, version 8.1, to build a website using DreamWeaver.

<?php
/**
* @version        $Id: index.php 1 9:23 2010-11-11 tianya $
* @package        DedeCMS.Site
* @copyright      Copyright (c) 2007 - 2010, DesDev, Inc.
* @license        http://help.dedecms.com/usersguide/license.html
* @link           http://www.dedecms.com
*/
if(!file_exists(dirname(__FILE__). '/data/common.inc.php'))
{
header('Location:install/index.php');
exit();
}
//Automatically generated HTML version
if(isset($_GET['upcache']) || !file_exists('index.html'))
{
require_once (dirname(__FILE__) . "/include/common.inc .php");
require_once DEDEINC."/arc.partview.class.php";
$GLOBALS['_arclistEnv'] = 'index';
$row = $dsql->GetOne( "Select * From `#@__homepageset`");
$row['templet'] = MfTemplet($row['templet']);
$pv = new PartView();
$pv ->SetTemplet($cfg_basedir . $cfg_templets_dir . "/" . $row['templet']);
$row['showmod'] = isset($row['showmod'])? $row[' showmod'] : 0;
if ($row['showmod'] == 1)
{
$pv->SaveToHtml(dirname(__FILE__).'/index.html');
          include(dirname(__FILE__).'/index.html');
          exit();
    } else {  
                  $pv->Display();
            exit();
}
}
else
{
header('HTTP/1.1 301 Moved Permanently');
header('Location:index.html');
}
?>

Baidu said that the environment is not safe but I don’t know why it is not safe. Please give me some advice. Thank you