求助求助。求懂微信公众平台开发模式高手帮忙！！

if($type=="event"){
$event = $xmlobj->Event;
if($event=="subscribe"){//如果用户发生了一次关注事件
//加载图文模版
$tpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[%s]]></MsgType>
<ArticleCount>2</ArticleCount>
<Articles>
<item>
<Title><![CDATA[%s]]></Title>
<Description><![CDATA[%s]]></Description>
<PicUrl><![CDATA[%s]]></PicUrl>
<Url><![CDATA[%s]]></Url>
</item>
<item>
<Title><![CDATA[%s]]></Title>
<Description><![CDATA[%s]]></Description>
<PicUrl><![CDATA[%s]]></PicUrl>
<Url><![CDATA[%s]]></Url>
</item>
</Articles>
<FuncFlag>1</FuncFlag>
</xml>";
$toUser = $fromuser;
$fromUser = $touser;
$time = time();
$type = "news";
$Title = "标题";
$Desription = "地址";
$PicUrl = "图片链接";
$Url = "图片超链接";
$str = sprintf($tpl,$toUser,$fromUser,$time,$type,$Title,$Desription,$PicUrl,$Url,$Title,$Desription,$PicUrl,$Url);
if(!empty($str)){
echo $str;
}
}
}