PHP-微信公众平台开发-接收用户输入消息类型并响应

<?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;

    }

}

?>