微信开发：微信js_sdk分享，使用场景，网页在微信app内部分享时的标题与描述，包括logo设置(一)

/**
 * CURL请求
 * @param $url 请求url地址
 * @param $method 请求方法 get post
 * @param null $postfields post数据数组
 * @param array $headers 请求header信息
 * @return mixed
 */
function httpRequest($url, $method, $postfields = null, $headers = array(), $debug = false) {
    $method = strtoupper($method);
    $ci = curl_init();
    /* Curl settings */
    curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
    curl_setopt($ci, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0");
    curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 60); /* 在发起连接前等待的时间，如果设置为0，则无限等待 */
    curl_setopt($ci, CURLOPT_TIMEOUT, 7); /* 设置cURL允许执行的最长秒数 */
    curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);
    switch ($method) {
        case "POST":
            curl_setopt($ci, CURLOPT_POST, true);
            if (!empty($postfields)) {
                $tmpdatastr = is_array($postfields) ? http_build_query($postfields) : $postfields;
                curl_setopt($ci, CURLOPT_POSTFIELDS, $tmpdatastr);
            }
            break;
        default:
            curl_setopt($ci, CURLOPT_CUSTOMREQUEST, $method); 
            break;
    }
    $ssl = preg_match(‘/^https:\/\//i‘,$url) ? TRUE : FALSE;
    curl_setopt($ci, CURLOPT_URL, $url);
    if($ssl){
        curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, FALSE); // https请求 不验证证书和hosts
        curl_setopt($ci, CURLOPT_SSL_VERIFYHOST, FALSE); 
    }
    //curl_setopt($ci, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ci, CURLOPT_MAXREDIRS, 2);/*指定最多的HTTP重定向的数量，这个选项是和CURLOPT_FOLLOWLOCATION一起使用的*/
    curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ci, CURLINFO_HEADER_OUT, true);
    $response = curl_exec($ci);
    $requestinfo = curl_getinfo($ci);
    $http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);
    curl_close($ci);
    return $response;
    //return array($http_code, $response,$requestinfo);
}

public function indexdemo(){
        //通过接口去拿token的值。
        $data[‘appid‘]="wx0c38278aa06f63dd";//这里的appid已经修改为假的，请大家替换
        $data[‘appSecret‘]="29cb76731d9f0d6c2e364190a1ad117c";//请替换
        $token=Cache::get(‘token‘);
        if(empty($token)){//token不存在，请求
             $token=gettoken($data);
             $strtoken=json_decode($token,true);
             $strtoken[‘expires_in‘]=$strtoken[‘expires_in‘]-10;//这里做10s的兼容处理。
             //设置access_token 缓存，跟有效期。           
             Cache::set(‘token‘,$strtoken[‘access_token‘],$strtoken[‘expires_in‘]);
             $token=$strtoken[‘access_token‘];
              
        } 
        //根据token 获取getticket ，jsapi数据
        $urling="https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=".$token."&type=jsapi";

        $ticket=Cache::get(‘ticket‘);

        if(empty($ticket)){//为空,获取ticket 
            $result=file_get_contents($urling);
            $result=json_decode($result,true);
            //返回结果成功,缓存ticket
            if($result[‘errcode‘]==‘0‘){
                $result[‘expires_in‘]=$result[‘expires_in‘]-10;//10s 兼容处理
                Cache::set(‘ticket‘,$result[‘ticket‘],$result[‘expires_in‘]);
                $ticket=$result[‘ticket‘];
            }
        }
        
       $jsapi_ticket=$ticket; 
       
       //生成随机的nonceStr 
       $noncestr = $this->createNonceStr();

       $protocol = (!empty($_SERVER[‘HTTPS‘]) && $_SERVER[‘HTTPS‘] !== ‘off‘ || $_SERVER[‘SERVER_PORT‘] == 443) ? "https://" : "http://";
       $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
       $timestamp = time();
       //按照字典序列组装字符串,并sha1加密。
       $string1 = "jsapi_ticket={$jsapi_ticket}&noncestr={$noncestr}&timestamp={$timestamp}&url={$url}";
       $signature = sha1($string1);    
       
       $signPackage = array(        
            ‘appId‘     => $data[‘appid‘],        
            ‘nonceStr‘  => $noncestr,        
            ‘timestamp‘ => $timestamp,        
            ‘signature‘ => $signature,
        );
       //返回数据给前端
        $this->assign(‘signPackage‘,json_encode($signPackage,true));
        // $this->assign(‘signPackage‘,$signPackage);
        return $this->fetch();
    }