帝国CMS如何判断会员是否登录及登录后才能看到内容

<?php

require("class/connect.php");

include("class/db_sql.php");

include("class/config.php");

include("data/dbcache/class.php");

$link=db_connect();

$empire=new mysqlquery();

$classid=intval($_GET['classid']);

$id=intval($_GET['id']);

$muserid=(int)getcvar('mluserid');//用户id

$musername=RepPostVar(getcvar('mlusername'));//用户名

$mgroupid=(int)getcvar('mlgroupid');//会员组id

if($classid&&$id&&$class_r[$classid][tbname]&&$muserid)

{

$r=$empire->fetch1("select id,phone from {$dbtbpre}ecms_".$class_r[$classid][tbname]." where id='$id' and classid='$classid' limit 1");

if($r[id])

{

?>

document.write('<li title="<?=$r[phone]?>">手机：<?=$r[phone]?></li>');

<?php

}

}

else

{

?>

document.write('<li class="businessCard-embed-content-nologin"><span>手机：</span><span class="businessCard-embed-content-nologinIcon"></span><a id="businessCard-embed-login" href="#">登录后可见</a></li>');

<?php

}

db_close();

$empire=null;

?>

<script src="[!--news.url--]e/show.php?classid=[!--classid--]&id=[!--id--]"></script>