php 自动把秒转换成分或者时

    /**
     * 格式化秒自动到 分或者时
     * @param int $second
     * @return string
     */
    function formatSecond($second = 0)
    {
        $unit = 0;

        $result = $second;

        $unitString = ['秒', '分', '时'];

        while ($result > 59 && $unit < count($unitString) - 1) {
            $unit++;

            $result = floor($result / 60);
        }

        return $result . $unitString[$unit];
    }