服务器-【微信开发】为什么TOKEN一直验证失败呢？

服务器php微信开发

我是用的SAE新浪云来搞的，也进行了实名认证，接受数据的URL也没输错，但是就是token验证不通过，眼睛都看花了，麻烦能人帮忙找找错~谢谢！

<code> <?phpheader ('content-type:text/html;charset=utf-8');    //定义常量TOKEN，用来存储token    define("TOKEN","weixin");    //封装验证逻辑    function checkSignature(){        //获取微信服务器发送的GET请求，得到四个参数        $signature = $_GET['signature'];        $timestamp = $_GET['timestamp'];        $nonce = $_GET['nonce'];        //定义数组，存储三个参数        $tmpArr = array(TOKEN,$nonce,$timestamp);        //对数组进行排序        sort($tmpArr,SORT_STRING);        //转换为字符串        $tempStr = implode($tmpArr);        //进行sha1加密        $tempStr = sha1($tempStr);        if($tempStr == $signature){            return true;        }else{            return false;        }    }    //判断是否验证成功    if(checkSignature()){        if($echostr){            $echostr = $_GET['echostr'];            echo $echostr;            exit();        }    }    //获取微信服务器发送的POST数据    $postData = $HTTP_RAW_POST_DATA;    if(!$postData){        echo "error";        exit();    }    //解析获得的数据    $object = simplexml_load_string($postData,"SimpleXMLElement",LIBXML_NOCDATA);    $ToUserName = $object -> ToUserName;    $FromUserName = $object -> FromUserName;    $MsgType = $object -> MsgType;    //根据不同类型的消息做出不同的回复    switch($MsgType){        case "text":            $Content = $object -> Content;            $respXml = "<xml>                        <tousername></tousername>                        <fromusername></fromusername>                        <createtime>&s</createtime>                        <msgtype></msgtype>                        <content></content>                        </xml>";            $result = sprintf($respXml,$FromUserName,$ToUserName,time(),$Content);            echo $result;        break;        case "image":            $MediaId = $object -> MediaId;            $respXml = "<xml>                        <tousername></tousername>                        <fromusername></fromusername>                        <createtime>%s</createtime>                        <msgtype></msgtype>                        <image>                        <mediaid></mediaid>                        </image>                        </xml>";            $result = sprintf($respXml,$FromUserName,$ToUserName,time(),$MediaId);            echo $result;        break;    }</code>