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>