function fileCheck($remoteFile){
$ch = curl_init($remoteFile);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); 
$data = curl_exec($ch);
curl_close($ch);
	if ($data === false) {
	  return 'cURL failed';
	}
	$status = 'unknown';
	   if (preg_match('/^HTTP\/1\.[01] (\d\d\d)/', $data, $matches)) {
	  $status = (int)$matches[1];
	}
	return $status;
}

$urlCheck = fileCheck("http://www.google.com.tr");

if($urlCheck == 200){
	echo "oke";
}else{
	echo "no";
}