微信开发 PHP代码笑话

<?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;
                $type = $postObj->MsgType;
                $customrevent = $postObj->Event;
                $latitude  = $postObj->Location_X;
                $longitude = $postObj->Location_Y;
                $keyword = trim($postObj->Content);
                $time = time();
                $textTpl = "<xml>
                            <ToUserName><![CDATA[%s]]></ToUserName>
                            <FromUserName><![CDATA[%s]]></FromUserName>
                            <CreateTime>%s</CreateTime>
                            <MsgType><![CDATA[%s]]></MsgType>
                            <Content><![CDATA[%s]]></Content>
                            <FuncFlag>0</FuncFlag>
                            </xml>";             
                switch ($type)
            {   case "event";
                if ($customrevent=="subscribe")
                    {$contentStr = "感谢你的关注\n回复1查看联系方式\n回复2查看最新资讯\n回复3查看法律文书";}
                break;
                case "image";
                $contentStr = "你的图片很棒！";
                break;
                case "location";
                $placeurl="https://maps.googleapis.com/maps/api/place/search/xml?location={$latitude},{$longitude}&radius=3000&sensor=false&key=AIzaSyAoKznDSiW_PzkiRapITcwT-UzwbeMkN1I&language=zh-CN&keyword=餐馆";
        $apistr=file_get_contents($placeurl);
        $apiobj=simplexml_load_string($apistr);
        $nameobj=$apiobj->result[0]->name;
        $addobj=$apiobj->result[0]->vicinity;
        $rateobj=$apiobj->result[0]->rating;
        $contentStr = "你周围餐馆有{$nameobj},地址{$addobj}，google评分{$rateobj}";

                break;
                case "link" ;
                $contentStr = "你的链接有病毒吧！";
                break;
                case "text";
                if ($keyword=="笑话")
                {$jokeurl="http://api.94qing.com/?type=joke&msg=";//笑话API
                $contentStr=file_get_contents($jokeurl);
                $contentStr = str_replace("\n","",$contentStr);
                }//读入文件                     
                break;                  
            default;
            $contentStr ="此项功能尚未开发";   
            }
                $msgType="text";
                $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                echo $resultStr;


        }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;
        }
    }
}

?>