PHP更新本地公网IP到阿里云域名解析，实现DDNS

<?php
#需要配置的项
define(\'ACCESSKEYID\',\'AAAAAAAAAAAAAAAA\');                  #阿里云用户密钥ID 获取方法 https://help.aliyun.com/knowledge_detail/38738.html
define(\'ACCESSKEYSECRET\',\'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\');#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(\'DOMAIN\',\'myhome.baidu.com\');                       #完整域名  
define(\'RECORDID\',\'11111111111111111\');                    #解析记录ID
/*关键如何获取解析记录ID ，需要在下面这个地址中
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（二级域名） 然后返回结果中获取这个ID 添加记录所需的参数文档在下面这里查看
https://help.aliyun.com/document_detail/29772.html?spm=a2c4g.11186623.4.3.392b5eb4SAeph9

*/

define(\'GET_IP_URL\',\'myip.fireflysoft.net\');
define(\'IP_FILE\',__DIR__. DIRECTORY_SEPARATOR .\'ip.txt\');

function 获取HTTP($url)
{
    $curl_samples = curl_init();
    $options = [CURLOPT_URL => $url,CURLOPT_RETURNTRANSFER => 1,CURLOPT_FOLLOWLOCATION => 1,CURLOPT_SSL_VERIFYPEER => 0];
    curl_setopt_array($curl_samples, $options);                
    curl_setopt($curl_samples, CURLOPT_CUSTOMREQUEST, \'GET\');  
    $result = curl_exec($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($result);
        echo PHP_EOL;
        echo $curl_err;
        echo PHP_EOL;
        exit;
    }
    return $result;
}
 
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 获取当前的解析记录值()
{
    #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\']       = gmdate("Y-m-d\TH:i:s\Z");
    #专用参数
    $data[\'Action\']     = \'DescribeDomainRecordInfo\';
    $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
    #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,true);
    return $result[\'Value\'];
    
}

function 主函数()
{   
    #获取现在网络的IP
    $ip = 获取HTTP(GET_IP_URL);
    #获取现在域名的解析结果 也就是旧的IP
    $旧IP = 获取当前的解析记录值();
    #对比新旧IP是否一样
    if(!isset($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\']       = 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();

用定时任务执行脚本即可