DateInterval::format
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
DateInterval::format — Formats the interval
說明
public DateInterval::format(string
$format): stringFormats the interval.
參數
-
format The following characters are recognized in the formatparameter string. Each format character must be prefixed by a percent sign (%).formatcharacterDescription Example values %Literal %%YYears, numeric, at least 2 digits with leading 0 01,03yYears, numeric 1,3MMonths, numeric, at least 2 digits with leading 0 01,03,12mMonths, numeric 1,3,12DDays, numeric, at least 2 digits with leading 0 01,03,31dDays, numeric 1,3,31aTotal number of days as a result of a DateTime::diff() or (unknown)otherwise4,18,8123HHours, numeric, at least 2 digits with leading 0 01,03,23hHours, numeric 1,3,23IMinutes, numeric, at least 2 digits with leading 0 01,03,59iMinutes, numeric 1,3,59SSeconds, numeric, at least 2 digits with leading 0 01,03,57sSeconds, numeric 1,3,57FMicroseconds, numeric, at least 6 digits with leading 0 007701,052738,428291fMicroseconds, numeric 7701,52738,428291RSign " -" when negative, "+" when positive-,+rSign " -" when negative, empty when positive-,
返回值
Returns the formatted interval.
更新日誌
| 版本 | 說明 |
|---|---|
| 7.1.0 | The F and f format
characters were added. |
範例
示例 #1 DateInterval example
<?php
$interval = new DateInterval('P2Y4DT6H8M');
echo $interval->format('%d days');
?> 以上例程會輸出：
4 days
示例 #2 DateInterval and carry over points
<?php
$interval = new DateInterval('P32D');
echo $interval->format('%d days');
?> 以上例程會輸出：
32 days
示例 #3 DateInterval and DateTime::diff() with the %a and %d modifiers
<?php
$january = new DateTime('2010-01-01');
$february = new DateTime('2010-02-01');
$interval = $february->diff($january);
// %a will output the total number of days.
echo $interval->format('%a total days')."\n";
// While %d will only output the number of days not already covered by the
// month.
echo $interval->format('%m month, %d days');
?> 以上例程會輸出：
31 total days 1 month, 0 days
註釋
注意:
The DateInterval::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".
參見
- DateTime::diff() - Returns the difference between two DateTime objects