kartik\helpers\Enum::time2String PHP Method

    protected static function time2String($time, $intervals)
    {
        $output = '';
        foreach ($intervals as $name => $seconds) {
            $num = floor($time / $seconds);
            $time -= $num * $seconds;
            if ($num > 0) {
                $output .= $num . ' ' . $name . ($num > 1 ? 's' : '') . ' ';
            }
        }
        return trim($output);
    }