Habari\Utils::atomtime PHP Method

    public static function atomtime($t)
    {
        if (!is_numeric($t)) {
            $t = strtotime($t);
        }
        $vdate = date(DATE_ATOM, $t);
        // If the date format used for timezone was O instead of P...
        if (substr($vdate, -3, 1) != ':') {
            $vdate = substr($vdate, 0, -2) . ':' . substr($vdate, -2, 2);
        }
        return $vdate;
    }