Php 如何将十进制转换为时间

我正在使用php并尝试将十进制转换为timehh:mm 但它不适用于任何代码和测试，原始字符串来自excel 例如：

这很简单。要将小数转换为小时，请与24相乘

$hours = $dec * 24;

现在，要将小数转换为小时：分钟，请使用以下命令：

function convertTime($dec)
{
    // start by converting to seconds
    $seconds = ($dec * 3600);
    // we're given hours, so let's get those the easy way
    $hours = floor($dec);
    // since we've "calculated" hours, let's remove them from the seconds variable
    $seconds -= $hours * 3600;
    // calculate minutes left
    $minutes = floor($seconds / 60);
    // remove those from seconds as well
    $seconds -= $minutes * 60;
    // return the time formatted HH:MM:SS
    return lz($hours).":".lz($minutes).":".lz($seconds);
}

// lz = leading zero
function lz($num)
{
    return (strlen($num) < 2) ? "0{$num}" : $num;
}

echo convertTime($hours);

资料来源：

---

输出：

我通常建议对任何日期算法使用DateTime类，而不是手动计算。它将考虑任何夏令时/等，尽管您的问题不清楚是否需要这样做

<?php
/**
 * @param float $x Decimal number of hours
 * @return string HH:mm
 */
function dec_hours($x) {
    $sec = intval($x * (24 * 60 * 60));
    $date = new DateTime("today +$sec seconds");
    return $date->format('H:i');
}

echo dec_hours(0.625);            // 15:00
echo dec_hours(0.53541666666667); // 12:51
echo dec_hours(0.40277777777778); // 09:40

---

0.625怎么等于15:00？哦，我知道了，0.625*24=15你能展示一下你的代码吗？

function convertTime($dec)
{
    // start by converting to seconds
    $seconds = ($dec * 3600);
    // we're given hours, so let's get those the easy way
    $hours = floor($dec);
    // since we've "calculated" hours, let's remove them from the seconds variable
    $seconds -= $hours * 3600;
    // calculate minutes left
    $minutes = floor($seconds / 60);
    // remove those from seconds as well
    $seconds -= $minutes * 60;
    // return the time formatted HH:MM:SS
    return lz($hours).":".lz($minutes).":".lz($seconds);
}

// lz = leading zero
function lz($num)
{
    return (strlen($num) < 2) ? "0{$num}" : $num;
}

echo convertTime($hours);

<?php
/**
 * @param float $x Decimal number of hours
 * @return string HH:mm
 */
function dec_hours($x) {
    $sec = intval($x * (24 * 60 * 60));
    $date = new DateTime("today +$sec seconds");
    return $date->format('H:i');
}

echo dec_hours(0.625);            // 15:00
echo dec_hours(0.53541666666667); // 12:51
echo dec_hours(0.40277777777778); // 09:40