阿里云解析记录应对家里动态IP

 <?php
 #需要配置的项
 define('ACCESSKEYID','');             #阿里云用户密钥ID 获取方法 https://help.aliyun.com/knowledge_detail/38738.html
 define('ACCESSKEYSECRET','');#阿里云用户密钥
 define('RR','myhome');                       #二级域名的记录名 如果是一级 请用@
 define('RECORDID','');
 /*解析记录ID ，需要在
 https://api.aliyun.com/?spm=a2c4g.11186623.2.26.79ae2846d9RBBa#/?product=Alidns&api=AddDomainRecord&params={}&tab=DEMO&lang=JAVA
 先设置一个记录 然后获取这个ID 添加所需的参数文档在
 https://help.aliyun.com/document_detail/29772.html?spm=a2c4g.11186623.4.3.392b5eb4SAeph9

 */

 define('GET_IP_URL','myip.fireflysoft.net');
 define('IP_FILE','./ip.txt');

 function 获取HTTP($url)
 {
     $curl_samples = curl_init();
     $options = [CURLOPT_URL => $url,CURLOPT_RETURNTRANSFER => 1,CURLOPT_FOLLOWLOCATION => 1,];
     curl_setopt_array($curl_samples, $options);
     curl_setopt($curl_samples, CURLOPT_CUSTOMREQUEST, 'GET');
     $ip = curl_exec($curl_samples);
     $info = curl_getinfo($curl_samples);
     $curl_err = curl_errno($curl_samples);
     curl_close($curl_samples);
     if( 0 != $curl_err )
     {
         echo "getip error:".date('Y-m-d H:i:s',time());
         var_dump($info);
         echo PHP_EOL;
         var_dump($ip);
         exit;
     }

     return $ip;
 }

 function 编码字符($string)
 {
     $result = urlencode($string);
     $result = str_replace(['+', '*'], ['%20', '%2A'], $result);
     $result = preg_replace('/%7E/', '~', $result);
     return $result;
 }

 function 排序参数计算签名($parameters,$method="GET")
 {
     ksort($parameters);
     $canonicalizedQuery = '';
     foreach ($parameters as $key => $value)
     {
         $canonicalizedQuery .= '&' . 编码字符($key) . '=' . 编码字符($value);
     }

     $stringToBeSigned = $method. '&%2F&'. 编码字符(substr($canonicalizedQuery, 1));
     return base64_encode(hash_hmac('sha1', $stringToBeSigned, ACCESSKEYSECRET . '&', true));
 }

 function 主函数()
 {
     $ip = 获取HTTP(GET_IP_URL);
     if(!file_exists(IP_FILE))
     {
         file_put_contents(IP_FILE,$ip);
     }else
     {
         $旧IP = file_get_contents(IP_FILE);
     }

     if(!isset($旧IP) || $旧IP !== $ip)
     {
         #请求dns的API重新做解析
         $api_url = 'https://alidns.aliyuncs.com/?';
         $data = [];
         #公共参数
         $data['Format']          = 'json';
         $data['Version']         = '2015-01-09';
         $data['SignatureMethod'] = 'HMAC-SHA1';
         $data['SignatureNonce']  = uniqid();
         $data['SignatureVersion']= '1.0';
         $data['AccessKeyId']     = ACCESSKEYID;
         //$data['Timestamp']       = date('Y-m-d\TH:i:s\Z',time());
         $data['Timestamp']       = gmdate("Y-m-d\TH:i:s\Z");
         #专用参数
         $data['Action']     = 'UpdateDomainRecord';
         $data['RecordId']   = RECORDID; #解析记录的ID，此参数在添加解析时会返回，在获取域名解析列表时会返回
         $data['RR']         = RR; #主机记录
         $data['Type']       = 'A';
         $data['Value']      = $ip;
         $data['TTL']        = 600;
         #$data['Priority']   = 10; #MX记录的优先级，取值范围[1,10]，记录类型为MX记录时，此参数必须
         $data['Line']       = 'default';
         #签名
         $data['Signature']  = 排序参数计算签名($data);
         #请求接口
         $json = 获取HTTP($api_url . http_build_query($data));
         $result = json_decode($json);

         #完成以后
         if(isset($result->RecordId)){
             file_put_contents(IP_FILE,$ip);
         }else{
             echo 'error';
             var_dump($result);
         }
     }else
     {
         echo 'IP没有发生变化，不需要修改解析记录';
     }
 }
 主函数();

建立计划任务

执行 php.exe 脚本.php > log.txt