cdDns (redirect as dynamic dns)

client.php

<?php
// specify serverside uri
$cddns_server = "http://www.example.com/cddns/server.php";

// specify alias name of ip address. (like a A record host name)
$alias = 'keiyacorg';

// same as server
$password = 'ponponpain';


$ch = curl_init();
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch,CURLOPT_URL,"$cddns_server?$alias");
curl_setopt($ch, CURLOPT_POSTFIELDS, "pass=$password");
curl_exec($ch);
curl_close($ch);

record.csv

keiyacorg	59.106.178.118

server.php

<?php
$password = 'ponponpain';
$record_file = 'record.csv';

$key = $_SERVER['QUERY_STRING'];
$modifi_r = $_SERVER['REMOTE_ADDR'];
$modified_record = array();
$exists = FALSE;
if ($_POST['pass'] == $password && $_SERVER['REQUEST_METHOD'] == 'POST') {
        if (($FH = fopen($record_file,'r+')) !== FALSE) {
                while (($record = fgetcsv($FH,0,"\t")) !== FALSE) {
                        $alias = $record[0];
                        $redirect = $record[1];
                        if ($alias == $key) {
                                $redirect = $modifi_r;
                                $exists = TRUE;
                        }
                        $modified_record[] = array($alias,$redirect);
                }
        }
        if ($exists == FALSE) {
                $modified_record[] = array($key,$modifi_r);
        }
        rewind($FH);
        foreach ($modified_record as $fields) {
                if (flock($FH,LOCK_EX)) {
                        fputcsv($FH,$fields,"\t");
                }
        }
}
if ($_SERVER['REQUEST_METHOD'] == 'GET') {
        if (($FH = fopen($record_file,'r')) !== FALSE) {
                while (($record = fgetcsv($FH,0,"\t")) !== FALSE) {
                        $alias = $record[0];
                        $redirect = $record[1];
                        if ($alias == $key) {
                                header("Location:http://$redirect/");
                        }
                }
        }
}
fclose($FH);