Dreamhost DNS Api DynDNS updater

dynupdate.php

<?php

if(isset($_GET['api_key'])) {
  $APIKEY=$_GET['api_key'];
} else {
  die("No api key");
}

if(isset($_GET['myhost'])) {
	$MYHOST=$_GET['myhost'];
} else {
	die("No host");
}

header('Contet-type: text/xml');

function wget($url) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($ch);
        curl_close($ch);
        return $output;
}

function getUserIpAddr(){
    if(!empty($_SERVER['HTTP_CLIENT_IP'])){
        //ip from share internet
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    }elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
        //ip pass from proxy
        $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
    }else{
        $ip = $_SERVER['REMOTE_ADDR'];
    }
    return $ip;
}

if(isset($_GET["myip"])) {
	$client_ip=$_GET["myip"];
} else {
	$client_ip=getUserIpAddr();
}

$issame=false;
$current_data=unserialize(wget("https://api.dreamhost.com/?key=$APIKEY&cmd=dns-list_records&format=php"));
if($current_data["result"]=='success') {
	for($recordid=0;$record=$current_data["data"][$recordid];$recordid++) {
		if($record["record"]==$MYHOST) {
			print "Found ".$MYHOST."\n";
			if($record["value"]==$client_ip) {
				print "same";
				$issame=true;
			} else {
				$junk=wget("https://api.dreamhost.com/?key=$APIKEY&cmd=dns-remove_record&record=$MYHOST&type=A&value=${record["value"]}");
			}
		}
	}
	if(!$issame) {
		$junk=wget("https://api.dreamhost.com/?key=$APIKEY&cmd=dns-add_record&record=$MYHOST&type=A&value=$client_ip");
		print "Set ".$MYHOST." to: ".$client_ip;
	}
}