function http_request($url, $data = null, $header = null, $method = 'GET') {
        //如果是Get传参，拼接字符串
        if ($method == 'GET') {
            if (isset($data) && count($data) > 0) {
                $url.='?1=1';
                foreach ($data as $key => $value) {
                    $url.='&' . $key . '=' . $value;
                }
                $url = str_replace('?1=1&', '?', $url);
            }
        }
        $curl = curl_init(); // 启动一个CURL会话
        curl_setopt($curl, CURLOPT_URL, $url); // 要访问的地址
        curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)');
        //报文头设置
        if (isset($header)) {
            curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
        }
        //设置Post参数
        if ($method == 'POST') {
            curl_setopt($curl, CURLOPT_POST, 1); // 发送一个常规的Post请求
            if (isset($data)) {
                curl_setopt($curl, CURLOPT_POSTFIELDS, $data); // Post提交的数据包
            }
        }
        //设置HTTPS
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        //设置超时限制防止死循环
        curl_setopt($curl, CURLOPT_TIMEOUT, 30);
        //显示返回的Header区域内容
        curl_setopt($curl, CURLOPT_HEADER, 0);
        //获取的信息以文件流的形式返回
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        //执行操作
        $tmpInfo = curl_exec($curl);
        //关闭CURL会话
        curl_close($curl);
        //返回数据
        return $tmpInfo;
    }

    function sendSms() {
        $phone = I('phone');
        if (!empty($phone)) {
            $url = 'https://ca.aliyuncs.com/gw/alidayu/sendSms';
            $data['rec_num'] =$phone;
            $data['sms_template_code'] = 'SMS_5013947';
            $data['sms_free_sign_name'] = '';
            $data['sms_type'] = 'normal';
            $data['extend'] = '111111';
            $data['sms_param'] = json_encode(array("code" => '' . NOW_TIME, "product" => ""));
            $header = array('X-Ca-Key:', 'X-Ca-Secret:');
            echo $this->http_request($url, $data, $header);
        }
    }