php怎么实现秒转换成分

本文操作环境：Windows7系统、PHP7.1版、DELL G3电脑

php 秒怎么转换成分？

php 自动把秒转换成分，时，天，周，月，年...

<?php
class Calendar
{
    
    const TIME_MINUTE = 60;
    
    const TIME_HOURS = 3600;
    
    const TIME_DAY = 3600 * 24;
    
    const TIME_WEEK = 3600 * 24 * 7;
    
    const TIME_MONTH = 3600 * 24 * 30;
    
    const TIME_YEAR = 3600 * 24 * 365;
    
    const TIME_YEAR_INTERCALARY = 3600 * 24 * 366;
    
    const TIME_NAMES = [
        0 => '秒',
        self::TIME_MINUTE => '分钟',
        self::TIME_HOURS => '小时',
        self::TIME_DAY => '天',
        self::TIME_WEEK => '周',
        self::TIME_MONTH => '月',
        self::TIME_YEAR => '年',
    ];
    
    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;
    }
 
}