秒的整数值换算成时分秒形式【原创】

给定一个整数值的秒值，将其换算成时分秒形式的值，如：3599秒换算成：00:59:59

<?php

$second = 3599;

$h = floor($second / 3600) ;
$h = $h > 9 ? $h : '0' . $h;
$m = floor(($second % 3600) / 60) ;
$m = $m > 9 ? $m : '0' . $m;
$s = $second -  $h * 3600 - $m * 60;
$s = $s > 9 ? $s : '0' . $s;
$time =  $h . ':' . $m . ':' . $s;
echo $time;