PHPDaemon\Config\Entry\Time::humanToPlain PHP Method

    public static function humanToPlain($value)
    {
        $time = 0;
        preg_replace_callback('~(\\d+(\\.\\d+)?)\\s*([smhd])\\s*|(.+)~i', function ($m) use(&$time) {
            if (isset($m[4]) && $m[4] !== '') {
                $time = false;
            }
            if ($time === false) {
                return;
            }
            if (!empty($m[2])) {
                $n = (double) $m[1];
            } else {
                $n = (int) $m[1];
            }
            $l = strtolower($m[3]);
            if ($l === 's') {
                $time += $n;
            } elseif ($l === 'm') {
                $time += $n * 60;
            } elseif ($l === 'h') {
                $time += $n * 60 * 60;
            } elseif ($l === 'd') {
                $time += $n * 60 * 60 * 24;
            }
        }, $value);
        return $time;
    }