一直提示失败

try {
  $signature = $_GET["signature"];
  $timestamp = $_GET["timestamp"];
  $nonce = $_GET["nonce"];

  $token = 'libertines';
  $tmpArr = array($token, $timestamp, $nonce);
  sort($tmpArr, SORT_STRING);
  $tmpStr = implode( $tmpArr );
  $tmpStr = sha1( $tmpStr );
  if( $tmpStr == $signature ){
    // return true;
    return $_GET["echostr"];
  }else{
      return false;
  }
} catch (\Exception $th) {
  Log::record('测试日志信息');
}