微网站微信带图片/描述分享

    require_once('include/lib/Jssdk.class.php');
    $jssdk = new JSSDK("wx05aeba88888888","719345b7e322222224d2be4ff3fca037");
    $signPackage = $jssdk->GetSignPackage();
    // dump($signPackage);exit;
    $this->assign('signPackage',$signPackage);

appId = $appId;
  $this->appSecret = $appSecret;
 }

 public function getSignPackage() {
  $jsapiTicket = $this->getJsApiTicket();
  $url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
  $timestamp = time();
  $nonceStr = $this->createNonceStr();

  // 这里参数的顺序要按照 key 值 ASCII 码升序排序
  $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";
  $signature = sha1($string);
  $signPackage = array(
   "appId"   => $this->appId,
   "nonceStr" => $nonceStr,
   "timestamp" => $timestamp,
   "url"    => $url,
   "signature" => $signature,
   "rawString" => $string
  );
  return $signPackage; 
 }

 private function createNonceStr($length = 16) {
  $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  $str = "";
  for ($i = 0; $i < $length; $i++) {
   $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
  }
  return $str;
 }

 private function getJsApiTicket() {
  // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例
  $data = json_decode(file_get_contents("http://www.town365.cn/mobile/jsapi_ticket.json"));
  if ($data->expire_time < time()) {
   $accessToken = $this->getAccessToken();
   $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
   $res = json_decode($this->httpGet($url));
   $ticket = $res->ticket;
   if ($ticket) {
    $data->expire_time = time() + 7000;
    $data->jsapi_ticket = $ticket;
    $fp = fopen("jsapi_ticket.json", "w");
    fwrite($fp, json_encode($data));
    fclose($fp);
   }
  } else {
   $ticket = $data->jsapi_ticket;
  }

  return $ticket;
 }

 private function getAccessToken() {
  // access_token 应该全局存储与更新，以下代码以写入到文件中做示例
  $data = json_decode(file_get_contents("http://www.town365.cn/mobile/access_token.json"));
  if ($data->expire_time < time()) {
   $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
   $res = json_decode($this->httpGet($url));
   $access_token = $res->access_token;
   if ($access_token) {
    $data->expire_time = time() + 7000;
    $data->access_token = $access_token;
    $fp = fopen("access_token.json", "w");
    fwrite($fp, json_encode($data));
    fclose($fp);
   }
  } else {
   $access_token = $data->access_token;
  }
  return $access_token;
 }

 private function httpGet($url) {
  $curl = curl_init();
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($curl, CURLOPT_TIMEOUT, 500);
  curl_setopt($curl, CURLOPT_URL, $url);

  $res = curl_exec($curl);
  curl_close($curl);

  return $res;
 }
}