define('AccessKeyId', 'KEY');
define('AccessKeySecret', 'Secret');

date_default_timezone_set('UTC');

/**
 *  获取本机 IP 地址
 */
function getIP() {
    $url = 'http://ip.taobao.com/service/getIpInfo.php?ip=myip';
    try {
        $json = json_decode(file_get_contents($url));
    } catch (Exception $e) {
        $json = [];
    }
    if (isset($json->code) && $json->code == 0) {
        return $json->data->ip;
    }
    return '';
}

/**
 *  获取请求签名
 */
function getSign($add){
    $nonce = time() . rand(11111, 99999);
    $time = date('Y-m-d') . 'T' . date('H:i:s') . 'Z';
    $data = array(
        'AccessKeyId' => AccessKeyId,
        'Format' => 'json',
        'SignatureMethod' => 'HMAC-SHA1',
        'SignatureNonce' => $nonce,
        'SignatureVersion' => '1.0',
        'Timestamp' => $time,
        'Version' => '2015-01-09'
    );
    $data = array_merge($data, $add);
    ksort($data);
    $format = http_build_query($data);
    $signUrl = 'GET&%2F&' . urlencode($format);
    $sign = urlencode(base64_encode(hash_hmac('sha1', $signUrl, AccessKeySecret . '&', true)));
    return array('url' => $format, 'sign' => $sign);
}

/**
 *  获取域名解析记录
 */
function getDNS($domain) {
    $sign = getSign(['Action' => 'DescribeSubDomainRecords', 'SubDomain' => $domain]);
    $url = 'https://alidns.aliyuncs.com/?' . $sign['url'] . '&Signature=' . $sign['sign'];
    $dns = json_decode(httpRequest($url));
    if (isset($dns->DomainRecords->Record[0])) {
        return $dns->DomainRecords->Record[0];
    }
    return '';
}

/**
 *  更新域名解析
 */
function updateDNS($id, $name, $ip) {
    $data = array(
        'Action' => 'UpdateDomainRecord',
        'RecordId' => $id,
        'RR' => $name,
        'Type' => 'A',
        'Value' => $ip,
    );
    $sign = getSign($data);
    $url = 'https://alidns.aliyuncs.com/?' . $sign['url'] . '&Signature=' . $sign['sign'];
    return httpRequest($url);
}

/**
 *  发起 HTTP 请求
 */
function httpRequest($url) {
    $header = array(
        'User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0',
        'Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',
        'Accept-Encoding: gzip, deflate',
        'Connection: keep-alive',
    );

    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($curl, CURLOPT_ENCODING, 'gzip');
    curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    $data = curl_exec($curl);
    $error = curl_error($curl);
    curl_close($curl);
    if ($error) {
        return $error;
    } else {
        return $data;
    }
}

function main() {
    $dns = getDNS('www.test.com');
    $ip = getIP();
    if (isset($dns->RecordId)) {
        echo updateDNS($dns->RecordId, 'www', $ip);
    }
}

main();