file_get_contents get http code

$timeout=5;
$send=array(
	'k'=>'v'
);
$opts=array(
	'http'=>array(
		'method'=>'POST',
		'header'=>'Content-Type: application/json; charset=utf-8',
		'content'=>json_encode($send),
		'timeout'=>$timeout
	)
);
$context=stream_context_create($opts);
$result=file_get_contents('https://example.com/url',false,$context);
preg_match('/([0-9])\d+/',$http_response_header[0],$matches);
$responsecode=intval($matches[0]);
if($responsecode==200){
}