$_SERVER get code status

function getStatusCode($url) {
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_NOBODY, TRUE); // remove body
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
    $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    return $status;
}