Neptun - google calendar proxy

<?php
$url = '';
$ch = curl_init($url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT, 10);
$naptar = curl_exec($ch);
$valasz = curl_getinfo($ch);
if($valasz['http_code'] == 200 && $valasz['download_content_length'] != 0){header('Content-Type: text/html; charset=utf-8');echo $naptar;}
else{header('HTTP/1.1 503 Service Temporarily Unavailable');};
curl_close($ch);
?>