<?php

    $SNIP1 = "1234";
    $SNIP2 = "1234";
    $curip = dns_get_record("cag.nightwire.de")[0]["ip"];
    $ipalive = "";

    function Connect($ip) {
        $serverConn = @stream_socket_client("tcp://{$ip}:443", $errno, $errstr);
        if ($errstr != '') {
            return false;
        }
        fclose($serverConn);
        return true;
    }

    if(Connect($SNIP1)){
        echo("SNIP1");
        $ipalive = $SNIP1;
    }elseif(Connect($SNIP2)){
        echo("SNIP2");
        $ipalive = $SNIP2;
    }

    if($ipalive != $curip){
        $url = "https://ddns.do.de/?username=XXXXX&password=XXXXXXX&hostname=XXXXXXXXXXXX&myip=" . $ipalive;
        print("Alte IP: {$curip}<br/>Neue IP: {$ipalive}");
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_exec($curl);
    }else{
        print("Update nicht notwendig");
    }

?>