PHP에서 몇 초 만에 구성요소를 변환하는 방법

<?php
class Calendar
{
    /**
     * 一分钟的秒数
     */
    const TIME_MINUTE = 60;
    /**
     * 一小时的秒数
     */
    const TIME_HOURS = 3600;
    /**
     * 一天的秒数
     */
    const TIME_DAY = 3600 * 24;
    /**
     * 一周的秒数
     */
    const TIME_WEEK = 3600 * 24 * 7;
    /**
     * 一月的秒数
     */
    const TIME_MONTH = 3600 * 24 * 30;
    /**
     * 一年（平年）的秒数
     */
    const TIME_YEAR = 3600 * 24 * 365;
    /**
     * 一年（闰年年）的秒数
     */
    const TIME_YEAR_INTERCALARY = 3600 * 24 * 366;
    /**
     * 时间=》对应名称
     */
    const TIME_NAMES = [
        0 => &#39;秒&#39;,
        self::TIME_MINUTE => &#39;分钟&#39;,
        self::TIME_HOURS => &#39;小时&#39;,
        self::TIME_DAY => &#39;天&#39;,
        self::TIME_WEEK => &#39;周&#39;,
        self::TIME_MONTH => &#39;月&#39;,
        self::TIME_YEAR => &#39;年&#39;,
    ];
    /**
     * 格式化秒自动到 分或者时 或者 天 等....
     * @param int $second
     * @param string[] $unitString 可以自己定义
     * @return string
     */
    public static function formatSecond($second = 0, $unitString = self::TIME_NAMES)
    {
        ksort($unitString);
        if ($second < self::TIME_MINUTE) return $second . $unitString[0];
        krsort($unitString);
        foreach ($unitString as $time => $unitName) {
            if ($time <= 0) continue;
            $result = floor($second / $time);
            if ($result >= 1) return $result . $unitName;
        }
        return null;
    }
 
}