GCM push하는데 couldn't connect to host 가 나오네요

Question

php와 연동으로 gcm을 구현하고 있는데

 

$registration_id = "디바이스 regstration_id";
$auth = "apikey";
$message = "TEST MESSAGE";

$headers = array
(
 'Content-Type:application/json',
 'Authorization:key='.$auth
);


$arr   = array();
$arr['data'] = array();
$arr['data']['msg'] = "TEST MESSAGE"; 
$arr['registration_ids'] = array();
$arr['registration_ids'][0] = $registration_id;


$ch = curl_init();

curl_setopt($ch, CURLOPT_URL,    'https://android.googleapis.com/gcm/send');
curl_setopt($ch, CURLOPT_TIMEOUT,  10);
curl_setopt($ch, CURLOPT_HTTPHEADER,  $headers);
curl_setopt($ch, CURLOPT_POST,    true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($arr));
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt'); 
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookie.txt'); 

$response = curl_exec($ch);
if($response === FALSE)
{
	die('Curl failed: ' .curl_error($ch));
}
curl_close($ch);

echo $response;

이렇게 두고 url로 접근해서 push 메세지가 오는자 확인해보려던 중인데 브라우저에 Curl failed: couldn't connect to host 만 찍히네요 이런 접근 방식이 잘못된건가요 아니면 뭔가 코드상에 문제가 있는건가요?

php는 전혀 몰라서 골치아프네요