微信开发 多图图文信息PHP代码

<?php
/**
  * wechat php test
  */

//define your token
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();
$wechatObj->responseMsg();
class wechatCallbackapiTest
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }

    public function responseMsg()
    {
        //get post data, May be due to the different environments
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

        //extract post data
        if (!empty($postStr)){

                $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
                $keyword = trim($postObj->Content);
                $time = time();
                $newsTpl = "<xml>
                            <ToUserName><![CDATA[%s]]></ToUserName>
                            <FromUserName><![CDATA[%s]]></FromUserName>
                            <CreateTime>%s</CreateTime>
                            <MsgType><![CDATA[news]]></MsgType>
                            <ArticleCount>2</ArticleCount>
                             <Articles>
                             <item>
                             <Title><![CDATA[保险法司法解释二出台]]></Title> 
                             <Description><![CDATA[对保险公司更加有利]]></Description>
                             <PicUrl><![CDATA[http://weixin1234.duapp.com/1.jpg]]></PicUrl>
                             <Url><![CDATA[http://www.chinacourt.org/article/detail/2013/06/id/1014893.shtml]]></Url>
                             </item>
                             <item>
                             <Title><![CDATA[保险法全文]]></Title> 
                             <Description><![CDATA[1]]></Description>
                             <PicUrl><![CDATA[http://t1.baidu.com/it/u=3340518375,2607788323&fm=23&gp=0.jpg]]></PicUrl>
                             <Url><![CDATA[http://www.gov.cn/flfg/2009-02/28/content_1246444.htm]]></Url>
                             </item>
                            <FuncFlag>0</FuncFlag>
                            </xml>";             
                if(!empty( $keyword ))
                {

                    $resultStr = sprintf($newsTpl, $fromUsername, $toUsername, $time);
                    echo $resultStr;
                }else{
                    echo "Input something...";
                }

        }else {
            echo "";
            exit;
        }
    }

    private function checkSignature()
    {
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];    

        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );

        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }
}

?>