php 如何将小数转换为时间，例如。时:分:秒
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How to convert a decimal into time, eg. HH:MM:SS
提问by HMFlol
I am trying to take a decimal and convert it so that I can echo it as hours, minutes, and seconds.
我正在尝试取一个小数并将其转换为小时、分钟和秒。
I have the hours and minutes, but am breaking my brain trying to find the seconds. Been googling for awhile with no luck. I'm sure it is quite simple, but nothing I have tried has worked. Any advice is appreciated!
我有小时和分钟，但我正在努力寻找秒数。用谷歌搜索了一段时间没有运气。我敢肯定这很简单，但我尝试过的一切都没有奏效。任何建议表示赞赏！
Here is what I have:
这是我所拥有的：
function convertTime($dec)
{
$hour = floor($dec);
$min = round(60*($dec - $hour));
}
Like I said, I get the hour and minute without issue. Just struggling to get seconds for some reason.
就像我说的那样，我可以毫无问题地获得小时和分钟。只是出于某种原因努力争取秒。
Thanks!
谢谢！
回答by Crontab
If $decis in hours ($decsince the asker specifically mentioned a decimal):
如果$dec以小时为单位（$dec因为提问者特别提到了十进制）：
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}" : $num;
}
回答by Cheery
Very simple solution in one line:
一行非常简单的解决方案：
echo gmdate('H:i:s', floor(5.67891234 * 3600));
回答by Patrick Jaja
Everything upvoted didnt work in my case. I have used that solution to convert decimal hours and minutes to normal time format. i.e.
在我的情况下，所有upvoted都不起作用。我已经使用该解决方案将十进制小时和分钟转换为正常时间格式。IE
function clockalize($in){
$h = intval($in);
$m = round((((($in - $h) / 100.0) * 60.0) * 100), 0);
if ($m == 60)
{
$h++;
$m = 0;
}
$retval = sprintf("%02d:%02d", $h, $m);
return $retval;
}
clockalize("17.5"); // 17:30
回答by Teldan
This is a great way and avoids problems with floating point precision:
这是一个很好的方法，可以避免浮点精度问题：
function convertTime($h) {
return [floor($h), (floor($h * 60) % 60), floor($h * 3600) % 60];
}
回答by Justin Pihony
I am not sure if this is the best way to do this, but
我不确定这是否是最好的方法，但是
$variabletocutcomputation = 60 * ($dec - $hour);
$min = round($variabletocutcomputation);
$sec = round((60*($variabletocutcomputation - $min)));
