<?php// 该代码块用于接收用户消息，根据用户输入的消息类型进行判断，文本，图片，视频，位置，链接，语音等，并取得值，处理后给予响应。// 接收用户消息// 微信公众账号接收到用户的消息类型判断//define("TOKEN", "weixin");$wechatObj = new wechatCallbackapiTest();if (!isset($_GET[‘echostr‘])) {    $wechatObj->responseMsg();}else{    $wechatObj->valid();}class wechatCallbackapiTest{    public function valid()    {        $echoStr = $_GET["echostr"];        if($this->checkSignature()){            echo $echoStr;            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;        }    }    public function responseMsg()    {        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];        if (!empty($postStr)){            $postObj = simplexml_load_string($postStr, ‘SimpleXMLElement‘, LIBXML_NOCDATA);            $RX_TYPE = trim($postObj->MsgType);            //用户发送的消息类型判断            switch ($RX_TYPE)            {                case "text":    //文本消息                    $result = $this->receiveText($postObj);                    break;                case "image":   //图片消息                    $result = $this->receiveImage($postObj);                    break;                case "voice":   //语音消息                    $result = $this->receiveVoice($postObj);                    break;                case "video":   //视频消息                    $result = $this->receiveVideo($postObj);                    break;                case "location"://位置消息                    $result = $this->receiveLocation($postObj);                    break;                case "link":    //链接消息                    $result = $this->receiveLink($postObj);                    break;                default:                    $result = "unknow msg type: ".$RX_TYPE;                    break;            }            echo $result;        }else {            echo "";            exit;        }    }    /*     * 接收文本消息     */    private function receiveText($object)    {        $content = "你发送的是文本，内容为：".$object->Content;        $result = $this->transmitText($object, $content);        return $result;    }    /*     * 接收图片消息     */    private function receiveImage($object)    {        $content = "你发送的是图片，地址为：".$object->PicUrl;        $result = $this->transmitText($object, $content);        return $result;    }    /*     * 接收语音消息     */    private function receiveVoice($object)    {        $content = "你发送的是语音，媒体ID为：".$object->MediaId;        $result = $this->transmitText($object, $content);        return $result;    }    /*     * 接收视频消息     */    private function receiveVideo($object)    {        $content = "你发送的是视频，媒体ID为：".$object->MediaId;        $result = $this->transmitText($object, $content);        return $result;    }    /*     * 接收位置消息     */    private function receiveLocation($object)    {        $content = "你发送的是位置，纬度为：".$object->Location_X."；经度为：".$object->Location_Y."；缩放级别为：".$object->Scale."；位置为：".$object->Label;        $result = $this->transmitText($object, $content);        return $result;    }    /*     * 接收链接消息     */    private function receiveLink($object)    {        $content = "你发送的是链接，标题为：".$object->Title."；内容为：".$object->Description."；链接地址为：".$object->Url;        $result = $this->transmitText($object, $content);        return $result;    }    /*     * 回复文本消息     */    private function transmitText($object, $content)    {        $textTpl = "<xml><ToUserName><![CDATA[%s]]></ToUserName><FromUserName><![CDATA[%s]]></FromUserName><CreateTime>%s</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[%s]]></Content></xml>";        $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content);        return $result;    }}?>