function curlHtml($url){
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
  $output = curl_exec($ch);
  //释放curl句柄
  curl_close($ch);
  return $output;
}
class Wechat
{
  public $errmsg;
  //微信登录获取用户信息
  public function getUserInfo() {
    //1.准备scope为snsapi_base网页授权页面
    $redirect_url = config('system.site_url') . $_SERVER["REQUEST_URI"];
    $baseurl = urlencode($redirect_url);
    $snsapi_base_url = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' . config('system.appid') . 'redirect_uri=' . $baseurl . 'response_type=codescope=snsapi_basestate=STATE#wechat_redirect';
    //2.静默授权,获取code
    //页面跳转至redirect_uri/?code=CODEstate=STATE
    $code = input('code');
    if (!isset($code) || empty($code)) {
      header('Location:' . $snsapi_base_url);exit(0);
    }
    //3.通过code换取网页授权access_token和openID
    $curl = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . config('system.appid') . 'secret=' . config('system.appsecret') . 'code=' . $code . 'grant_type=authorization_code';
    $content = curlHtml($curl);
    $result = json_decode($content, true);
    if(!isset($result['openid'])) {
      $this->errmsg = $result['errmsg'];return false;
    }
    $openid = $result['openid'];
    $userinfo = $this->getUserByOpenid($openid);
    return $userinfo;
  }
  private function getUserByOpenid($openid) {
    //获取access_token
    $token_info  = $this->curlGetWxAccessToken();
    $access_token = $token_info['value'];
    //通过OpenID来获取用户基本信息
    $url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=".$access_token."openid=".$openid."lang=zh_CN";
    $content = curlHtml($url);
    $result = json_decode($content, true);
    return $result;
  }
  /**
   * [wxShare 微信分享]
   * @param [type] $url [description]
   * @return [type]   [description]
   */
  public function wxShare()
  {
    $noncestr = uniqid();
    $timestamp = time();
    $url = config('system.site_url') . $_SERVER["REQUEST_URI"];
    // $redis   = new \Redis;
    // $ticket_key = 'wx_ticket';
    // $ticket   = $redis->get($ticket_key);
    // if (!$ticket) {
    //   $ticket = $this->getJsapiTicket();
    //   $redis->set($ticket_key, $ticket);
    //   $redis->expire($ticket_key, 7200);
    // }
    $ticket = $this->getJsapiTicket();
    if ($ticket) {
      $str     = 'jsapi_ticket=' . $ticket . 'noncestr=' . $noncestr . 'timestamp=' . $timestamp . 'url=' . $url;
      $signature  = sha1($str);
      $return_data = [
        'noncestr' => $noncestr,
        'timestamp' => $timestamp,
        'signature' => $signature,
        'appid'   => config('system.appid'),
        'link'   => $url,
      ];
      return $return_data;
    }
  }
  private function getJsapiTicket()
  {
    $map['keyname'] = 'Ticket';
    $map['modifytime'] = array('GT', time() - 7200);
    $return       = WxTokenModel::getOne('*', $map);
    if ($return) {
      return $return['value'];
    } else {
      $token_info  = $this->curlGetWxAccessToken();
      $access_token = $token_info['value'];
      $url     = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=' . $access_token . 'type=jsapi';
      $output    = curlHtml($url);
      $data     = json_decode($output, true);
      if (isset($data['errcode'])  $data['errcode'] == 0) {
        $condition['keyname'] = 'Ticket';
        $update_data['modifytime'] = time();
        $update_data['value']   = $data['ticket'];
        $up_result      = WxTokenModel::updateData($condition, $update_data);
        if ($up_result !== false) {
          return $data['ticket'];
        }
      }
    }
    return false;
  }
  private function curlGetWxAccessToken()
  {
    $map['keyname'] = 'AccessToken';
    $map['modifytime'] = array('GT', time() - 7200);
    $return = WxTokenModel::getOne('*', $map);
    if ($return) {
      return $return;
    } else {
      $url  = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credentialappid=' . config('system.appid') . 'secret=' . config('system.appsecret');
      $output = curlHtml($url);
      $data = json_decode($output, true);
      if ($data  isset($data['access_token'])) {
        $condition['keyname'] = 'AccessToken';
        $update_data['modifytime'] = time();
        $update_data['value'] = $data['access_token'];
        $up_result      = WxTokenModel::updateData($condition, $update_data);
        if ($up_result !== false) {
          return $update_data;
        }
      }
    }
    return false;
  }
}

script type="text/javascript" src="http://res.wx.qq.com/open/js/jweixin-1.2.0.js">/script>
script>
wx.config({
   debug: false,
   appId: '{$appid}', // 必填，公众号的唯一标识
   timestamp: '{$timestamp}', // 必填，生成签名的时间戳
   nonceStr: '{$noncestr}', // 必填，生成签名的随机串
   signature: '{$signature}',// 必填，签名，见附录1
   jsApiList: ['onMenuShareTimeline'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
});
wx.ready(function () {
  // 分享到朋友圈
  wx.onMenuShareTimeline({
   title: '', // 名
   link: '{$link}', // 地址
   imgUrl: '', // 分享的图标
   success: function () {
   // 用户确认分享后执行的回调函数
   },
   cancel: function () {
    // 用户取消分享后执行的回调函数
  }
  });
});
/script>