php将秒数转换成可读性良好的格式

比如秒数时间很长，可以通过这段代码转换成几年几月几日的形式

$time = time() - $time;
 
        $points = array(
            'year'     => 31556926,
            'month'    => 2629743,
            'week'     => 604800,
            'day'      => 86400,
            'hour'     => 3600,
            'minute'   => 60,
            'second'   => 1
        );
 
        foreach($points as $point => $value)
        {
            if($elapsed = floor($time/$value) > 0)
            {
                $s = $elapsed>1?'s':'';
                $timestamp = "$elapsed $point$s";
                break;
            }
        }