php 减去两个持续时间并减少百分比以获得最终时间

Question

我将持续时间值存储在数据库中，以了解在给定的工作周内我必须做多少事情。例如，我有以下输入来根据总持续时间、减少的持续时间（例如午餐时间、会议、上厕所等）和减少的百分比来计算一周内的产能持续时间。因此，例如我有以下值：

$total_duration = 30:30:00; //(37 hours 30 mins 00 secs)
$reduced_duration = 01:00:00; //(1 hour 00 mins 00 secs)
$capacity_percentage = 90%; // capacity percentage for leeway

因此我想做的是从 $reduced_duration 中减去 $total_duration，然后得到这个总数的 $capacity_percentage%。

我正在尝试以下操作；

    $total_duration = '30:30:00'; //(37 hours 30 mins 00 secs)
    $reduced_duration= '01:00:00'; //(1 hour 00 mins 00 secs)
    $capacity_percentage ='90%'; // capacity percentage for leeway

    $total_duration_hrs = 0;
    $total_duration_mins = 0;
    $total_duration_secs = 0;

    $reduced_duration_hrs = 0;
    $reduced_duration_mins = 0;
    $reduced_duration_secs = 0;

    list($total_duration_hours, $total_duration_minutes, $total_duration_minutes) = explode(':', $total_duration);

    list($reduced_duration_hours, $reduced_duration_minutes, $reduced_duration_seconds) = explode(':', $reduced_duration);

    $total_duration_hrs += (int) $total_duration_hours;
    $total_duration_mins += (int) $total_duration_minutes;
    $total_duration_secs += (int) $total_duration_minutes;

    $reduced_duration_hrs += (int) $reduced_duration_hours;
    $reduced_duration_mins += (int) $reduced_duration_minutes;
    $reduced_duration_secs += (int) $reduced_duration_seconds;

    $totalhrs = ($total_duration_hrs - $reduced_duration_hrs);
    $totalmins = ($total_duration_mins - $reduced_duration_mins);
    $totalsecs = ($total_duration_secs - $reduced_duration_secs);

这给了我正确的总时间，即 29:30:30。但现在我有点不确定如何找到百分比时间值，我会找到 90% 的小时、分钟和秒，还是我会做其他事情？有什么想法吗？

Answer 1

如果你在几秒钟内完成所有事情并且只在你想要输出或读取值时将其转换为小时、分钟、秒，那就更容易了。这样你的逻辑就会变得更简单并且更少依赖于状态。

写一个函数把秒转换成hours:minutes:seconds

function secondsToFormat($seconds) {
    $diff = (new DateTime)->sub(new DateInterval("PT{$seconds}S"))->diff(new DateTime);
    $h = $diff->format("%h") + $diff->format("%a") * 24;
    return $diff->format("{$h}:%I:%S");
}

写一个函数将hours:minutes:seconds转换成秒

现在您需要一个执行相反操作的函数，以便您可以轻松地在两者之间进行转换。

function formatToSeconds($formattedTimeString) {
    list($hours, $minutes, $seconds) = explode(":", $formattedTimeString);
    $seconds += $hours * 60 * 60;
    $seconds += $minutes * 60;
    return $seconds;
}

写一个函数来计算占总数的百分比

function getPercentage($total, $percent) {
    return (int) floor($total / 100 * $percent);
}

现在你可以简单地做到这一点...

$t = formatToSeconds($total_duration);
$r = formatToSeconds($reduced_duration);
$diff = $t - $r; // difference in seconds
echo secondsToFormat(getPercentage($diff, 90)), " at 90% capacity";

你会得到类似 26:33:00 at 90% capacity

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