Question

我已经尝试了很长一段时间来搜索我的问题的答案，但我还没有解决。我是PHP的新手。

问题。

将2:00除以2 (hr/2) = 1:00 //格式h：i

感谢。

Answer 1

我认为最安全的方法是转换为秒并使用日期显示它。

$time ="3:00";

list($hours, $minutes) = explode(":", $time);
$minutes += $hours*60;
$seconds = $minutes*60;
date_default_timezone_set ("UTC"); // makes sure there is no DST or timezone added to result
echo "new time: " . date("h:i", $seconds/2);  // 01:30

你的问题是“h：i”格式，但它写成“1:00” 要获得1:00，您需要使用格式“G：i” https://3v4l.org/4MjVQ

Answer 2

对于记录，在任何编程/脚本语言中划分时间都是微不足道的。因为如果我们谈论的是时间戳，那么划分它就没有意义，因为时间戳是年表的特定点。

另一方面，持续时间可以分开。但是，我不确定php的API是否有任何持续时间处理的实现。您仍然可以继续使用自己的定制实现来处理时间间隔。这将是类似的事情。

<?php
    #We need at least two timestamps to get a duration
    $time1 = new DateTime("2018-4-23 10:00:00");
    $time2 = new DateTime("2018-4-23 11:00:00");

    $durationInSeconds = ($time2->getTimestamp()) - ($time1->getTimestamp()); //Get the interval in seconds
    #echo $durationInSeconds; // Gives you 3600 seconds
    # Now you can divide these seconds into anything you prefer.
    # Let's say I want two intervals. This means, I have to go for the timestamp in between the two. I could do that by simply adding half the amount of seconds
    $halfDurationInSeconds = $durationInSeconds / 2;
    $time1->add(new DateInterval("PT".$halfDurationInSeconds."S")); // adds 1800 secs
    echo $time1->format('Y-m-d H:i:s');

Answer 3

非常简单。使用strtotime

$your_time = "12:00";
date_default_timezone_set ("UTC");
$secs = strtotime($your_time ) - strtotime("00:00:00");
echo date("H:i:s",$secs / 2);

Answer 4

我想我们也可以在这里使用乘法。感谢上面的建议。它确实帮了我很多忙。这是我修改的上述建议代码。

function multiplyTime ($multiple, $prescribeWorkingHrs) {
    list($hours, $minutes) = explode(":", $prescribeWorkingHrs);
    $minutes += $hours*60;
    $seconds = $minutes*60;
    $product = $seconds * $multiple;

    return date("h:i", $product);
}

结果：

multiplyTime(0.75, "8:00") = "6:00"
multiplyTime(0.5, "8:00") = "4:00"
multiplyTime(0.25, "8:00") = "2:00"

希望这也会有所帮助。感谢

如何在PHP中划分小时数？

4 个答案: