//微信远程登录绑定账号
  public function Curl_login($username,$pwd){
  $config_token = "XiaoDengPHP";
  $pwd = md5($pwd);
  $url = "https://mp.weixin.qq.com/cgi-bin/login";
  $postArray = array("username=".$username,"pwd=".$pwd,"imgcode=","f=json");
  $fields = implode("&", $postArray);
  $filedir = $_SERVER['DOCUMENT_ROOT']."/Cookies";
  $cookie_file = $filedir."/cookie.txt";
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1); //表示是https协议提交
  curl_setopt($ch, CURLOPT_HEADER, 0); //不返回header部分
  curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)");
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
  curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file); //生产Cookies并保存在指定目录下
  curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); //将curl_exec()获取的信息以文件流的形式返回，而不是直接输出。
  curl_setopt($ch, CURLOPT_REFERER,"https://mp.weixin.qq.com/cgi-bin/login"); //跳转指向
  $result = curl_exec($ch);
  return json_decode($result);
  // 关闭CURL会话
  curl_close($ch);
}

public function auth($token)
{
    $data = array(
    $_GET['timestamp'],
    $_GET['nonce'],
    $token);
    $sign = $_GET['signature'];
    sort($data);
    $signature = sha1(implode($data));
    if($signature === $sign){
       echo ($_GET['echostr']);
     exit;
    }else{
     return false;
    }
}