客服消息推送配置：Token校验失败，请检查确认？

public function automaticRecovery(Request $request) {     $signature = $request->param('signature');      $timestamp = $request->param('timestamp');      $nonce = $request->param('nonce');      $echostr = $request->param('echostr');      $token = TOKEN;      $tmpArr = array($token, $timestamp, $nonce);      sort($tmpArr, SORT_STRING);      $tmpStr = implode($tmpArr);      $tmpStr = sha1($tmpStr);        if ($tmpStr == $signature) {         echo $echostr;         exit;      } else {        return false;     } }

[signature]：0c777946cdb3c5a285d71e2800eec14d66b73aeb

[timestamp]：1569317661

[nonce]：639796845

[tmpStr]：0c777946cdb3c5a285d71e2800eec14d66b73aeb

微信请求正常，代码执行正常。返回数据无法验证！