织梦cms如何实现随机文章定时更新

{dede:arclist sort=’rand’ titlelen=48 row=16}
<li><a href="[field:arcurl/]" title="[field:title/]" target="_blank">[field:title/]</a></li>
{/dede:arclist}

<?php
function sp_input( $text )
{
$text = trim( $text );
$text = htmlspecialchars( $text );
if (!get_magic_quotes_gpc())
return addslashes( $text );
else
return $text;
}
$autotime = 3600;//自动更新时间，单位为秒，这里我设为一小时，大家可以自行更改。
$fpath = "../data/last_time.inc";//记录更新时间文件，如果不能达到目的，请检查是否有读取权限。
include( $fpath );
if( empty($last_time))
$last_time = 0;
if( sp_input($_GET['renew'])=="now")
$last_time = 0;
if((time()-$last_time)>=$autotime )
{
define('DEDEADMIN', ereg_replace("[/\]{1,}",'/',dirname(__FILE__) ) );
require_once(DEDEADMIN."/../include/common.inc.php");
require_once(DEDEINC."/arc.partview.class.php");
/*
$row = $dsql->GetOne("Select * From dede_homepageset");
$dsql->Close();
$templet=$row['templet'];
$position=$row['position'];
*/
$templet = “tnbjh/index.htm”;//这里是首页模板位置，当前是dede默认首面位置。
$position = "../index.html";
$homeFile = dirname(__FILE__)."/".$position;
$homeFile = str_replace("\", "/", $homeFile );
$homeFile = str_replace( "//", "/", $homeFile );
$pv = new PartView();
$pv ->SetTemplet( $cfg_basedir.$cfg_templets_dir."/".$templet );
$pv -> SaveToHtml( $homeFile );
$pv -> Close();
$file = fopen( $fpath, "w");
fwrite( $file, "<?php
");
fwrite( $file,"$last_time=".time().";
");
fwrite( $file, '?>' );
fclose( $file );
}
?>

<script src="/plus/autoindex.php" language="javascript"></script>