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$time_start = mktime(12,0,0,1,1,2011);
$time_end = mktime(12,0,0,7,1,2011);
$format = '%m months';

$start_date = new DateTime(date(DATE_ATOM,$time_start));
$end_date = new DateTime(date(DATE_ATOM,$time_end));
$diff = $start_date->diff($end_date, true);
echo $diff->format($format);

输出“5 个月”,我猜是因为由于 DST,它会延迟一个小时。但是,我需要计算日历月的差异;是否有另一个类/函数可以做到这一点?


添加了一些修复:

if($time_start > $time_end) list($time_start, $time_end) = array($time_end, $time_start);
$time_end += (date('I',$time_end)-date('I',$time_start))*3600; // correct for DST
$start_date = new DateTime(date(DATE_ATOM,$time_start));
$end_date = new DateTime(date(DATE_ATOM,$time_end));
$start_date->modify('12pm'); // ignore time difference
$end_date->modify('12pm');
$diff = $start_date->diff($end_date);
echo $diff->format($format);

这似乎给出了我想要的结果,但我还没有完全测试它。


更多修复,基于 Herbert 的建议:

if($time_start > $time_end) list($time_start, $time_end) = array($time_end, $time_start);
$start_date = new DateTime();
$end_date = new DateTime();
$start_date->setTimestamp($time_start);
$end_date->setTimestamp($time_end);
$diff = $start_date->diff($end_date);
$hours = $diff->format('%h');
$mins = $diff->format('%i');
$secs = $diff->format('%s');
$start_date->setTime(12,0,0);//ignore time difference for date calculations
$end_date->setTime(12,0,0);
$diff = $start_date->diff($end_date);
$years = $diff->format('%y');
$months = $diff->format('%m');
$weeks = $diff->format('%w');
$days = $diff->format('%d');

请注意,$start_date->modify('12pm')实际上根本没有做任何事情。不知道为什么它没有出错。

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1 回答 1

2

更新

在搞砸了很多不同的想法之后,我突然想到时间戳是 GMT (UTC)。date(DATE_ATOM,$time_start)正在应用默认时区。但是,如果您明确设置时间戳,DateTime将假定为 UTC——因此,没有 DST 问题。

无论时区或 DST ,以下代码似乎都可以工作。

<?php

$time_start = mktime(12,0,0,1,1,2011);
$time_end = mktime(12,0,0,7,1,2011)

$start_date = new DateTime();
$end_date = new DateTime();

$start_date->setTimestamp($time_start);
$end_date->setTimestamp($time_end);

$diff = $start_date->diff($end_date);

$format = '%m months';
echo $diff->format($format);

?>

我测试了一些极端情况——日期和时间,以及各种时区——但我没有测试所有可能性,所以如果你遇到问题,我很想听听。

于 2011-09-29T18:48:08.320 回答