PHP 微信公众号开发者模式 第三方接入

<?php//define your tokendefine("TOKEN", "weixin2015");$wechatObj = new wechatCallbackapiTest();$wechatObj->valid();class wechatCallbackapiTest{    public function valid(){        $echoStr = $_GET["echostr"];                //valid signature , option        if($this->checkSignature()){            echo $echoStr;            $this->responseMsg();//验证后处理用户发关的消息-这里是原样返回用户的消息]            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;                $event = $postObj->Event;        $c = $postObj->Location_X;                $d = $postObj->Location_Y;        $Label = $postObj->Label;                        $keyword = trim($postObj->Content);        $PicUrl = trim($postObj->PicUrl);         $msgType = trim($postObj->msgType);                $time = time();                            $textTpl = "<xml>                        <ToUserName><![CDATA[%s]]></ToUserName>                        <FromUserName><![CDATA[%s]]></FromUserName>                        <CreateTime>%s</CreateTime>                        <MsgType><![CDATA[%s]]></MsgType>                        <Content><![CDATA[%s]]></Content>                        <FuncFlag>1</FuncFlag>                        </xml>";                $msgid = $postObj->MsgId;        $picurl = $postObj->PicUrl;                $piccontentTpl="<xml>                             <ToUserName><![CDATA[%s]]></ToUserName>                             <FromUserName><![CDATA[%s]]></FromUserName>                             <CreateTime>%s</CreateTime>                             <MsgType><![CDATA[%s]]></MsgType>                             <ArticleCount>1</ArticleCount>                             <Articles>                             <item>                                 <Title><![CDATA[%s]]></Title>                                 <Description><![CDATA[%s]]></Description>                                 <PicUrl><![CDATA[%s]]></PicUrl>                                 <Url><![CDATA[%s]]></Url>                             </item>                             </Articles>                             <FuncFlag>1</FuncFlag>                             </xml>";//图片消息        //天气信息        $textHaderTpl = "<xml><ToUserName><![CDATA[%s]]></ToUserName><FromUserName><![CDATA[%s]]></FromUserName><CreateTime>%s</CreateTime><MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content><ArticleCount>%d</ArticleCount><Articles>";$textContentTpl = "<item><Title><![CDATA[%s]]></Title><Description><![CDATA[%s]]></Description><PicUrl><![CDATA[%s]]></PicUrl><Url><![CDATA[%s]]></Url></item>";$textFooterTpl = "</Articles><FuncFlag>1</FuncFlag></xml>";                $imageTpl="<xml>                             <ToUserName><![CDATA[%s]]></ToUserName>                             <FromUserName><![CDATA[%s]]></FromUserName>                             <CreateTime>%s</CreateTime>                             <MsgType><![CDATA[%s]]></MsgType>                             <Image>                             <MediaId><![CDATA[%s]]></MediaId>                             </Image>                             </xml>";//图片image                      if(!empty($keyword)){ if(1==$keyword){$msgType = "text";$content1="你的openid: $fromUsername \r\n \r\n TOKEN:".TOKEN.'';$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType,  $content1);    echo $resultStr; }else{//接入第三方URL、token$url = '第三方URL';$token = '第三方TOKEN';$timestamp = $_GET["timestamp"];                $nonce = $_GET["nonce"];                $tmpArr = array($token, $timestamp, $nonce);            sort($tmpArr, SORT_STRING);            $tmpStr = implode( $tmpArr );            $tmpStr = sha1( $tmpStr );                $url .= stripos($url, '?') === false ? '?' : '&';                $url .= http_build_query(array(                      'signature' => $tmpStr,                      'timestamp' => $timestamp,                      'nonce' => $nonce,                ));//echo $url;//如果不是项目相关的事件 $returnStr返回空$header = array();//$header[] = "Content-type: text/xml";//定义content-type为xml$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);                curl_setopt($ch, CURLOPT_HTTPHEADER, $header);                curl_setopt($ch, CURLOPT_POST, 1);                curl_setopt($ch, CURLOPT_POSTFIELDS, $postStr);//curl_setopt($ch, CURLOPT_POSTFIELDS, $pp);$response = curl_exec($ch);if(curl_errno($ch)){    error_log (curl_error($ch));}curl_close($ch);echo $response;  }                                                   }else{                    if($event=="subscribe"){//                    $msgType = "text";                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, "欢迎关注");                    echo  $resultStr;                }else if($type=='location'){//                                     }                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,SORT_STRING);$tmpStr = implode( $tmpArr );$tmpStr = sha1( $tmpStr );if( $tmpStr == $signature ){return true;}else{return false;}}}?>