DateInterval::format()

(PHP 5 >= 5.3.0, PHP 7)

Formats the interval

说明

Formats the interval.

参数

返回值

Returns the formatted interval.

注释

TheDateInterval::format()method does not recalculate carry over points in time strings nor in date segments. This is expected because it is not possible to overflow values like"32 days"which could be interpreted as anything from"1 month and 4 days"to"1 month and 1 day".

更新日志

范例

Example #1DateIntervalexample

以上例程会输出：

4 days

Example #2DateIntervaland carry over points

以上例程会输出：

32 days

Example #3DateIntervalandDateTime::diff()with the %a and %d modifiers

以上例程会输出：

31 total days
1 month, 0 days

参见

• DateTime::diff() Returns the difference between two DateTime objects

How to easy recalculate carry over points: 

Be aware that your default timezone can sometimes alter the result of a diff so that the returned months/days are incorrect. 
There is a bug report at: http://bugs.php.net/bug.php?id=52480

Quick class to allow you to input a time in any unit, and have it recalculate in to different denominations (for example, seconds to hours, minutes and seconds): 

glavic, this does not eliminate the problem of "32 days", if you use your class for normalizing intervals of days, because the result will depend on the current month which is used for DateTime by default. And if that does not matter (because the interval is not that long) you don't have to call diff() to get the same recalculation: 
$DT=new DateTime('0000-01-01'); $DT->add($oInt); echo($DT->format('Y-m-d H:i:s'));

The fact that $dateTime->diff(new DateTime()) returns a DateInterval and the interval is something where you don't get any useful number is somebit annoying.

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