DateInterval::__construct
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
DateInterval::__construct — Creates a new DateInterval object
說明
$duration)Creates a new DateInterval object.
參數
-
duration -
An interval specification.
The format starts with the letter
P, forperiod.
Each duration period is represented by an integer value followed by a period designator. If the duration contains time elements, that portion of the specification is preceded by the letterT.durationPeriod DesignatorsPeriod Designator Description Yyears Mmonths Ddays Wweeks. Converted into days. Prior to PHP 8.0.0, can not be combined with D.Hhours Mminutes Sseconds Here are some simple examples. Two days is
P2D. Two seconds isPT2S. Six years and five minutes isP6YT5M.注意:
The unit types must be entered from the largest scale unit on the left to the smallest scale unit on the right. So years before months, months before days, days before minutes, etc. Thus one year and four days must be represented as
P1Y4D, notP4D1Y.The specification can also be represented as a date time. A sample of one year and four days would be
P0001-00-04T00:00:00. But the values in this format can not exceed a given period's roll-over-point (e.g.25hours is invalid).These formats are based on the » ISO 8601 duration specification.
錯誤／異常
Throws an Exception when the duration
cannot be parsed as an interval.
更新日誌
| 版本 | 說明 |
|---|---|
| 8.2.0 |
Only the y to f,
invert, and days will be visible,
including a new from_string boolean property.
|
| 8.0.0 |
W can be combined with D.
|
範例
示例 #1 DateInterval example
<?php
$interval = new DateInterval('P1W2D');
var_dump($interval);
?>
以上例程在 PHP 8.2 中的輸出：
object(DateInterval)#1 (10) {
["y"]=>
int(0)
["m"]=>
int(0)
["d"]=>
int(9)
["h"]=>
int(0)
["i"]=>
int(0)
["s"]=>
int(0)
["f"]=>
float(0)
["invert"]=>
int(0)
["days"]=>
bool(false)
["from_string"]=>
bool(false)
}
以上例程在 PHP 8 中的輸出：
object(DateInterval)#1 (16) {
["y"]=>
int(0)
["m"]=>
int(0)
["d"]=>
int(9)
["h"]=>
int(0)
["i"]=>
int(0)
["s"]=>
int(0)
["f"]=>
float(0)
["weekday"]=>
int(0)
["weekday_behavior"]=>
int(0)
["first_last_day_of"]=>
int(0)
["invert"]=>
int(0)
["days"]=>
bool(false)
["special_type"]=>
int(0)
["special_amount"]=>
int(0)
["have_weekday_relative"]=>
int(0)
["have_special_relative"]=>
int(0)
}
以上例程在 PHP 7 中的輸出：
object(DateInterval)#1 (16) {
["y"]=>
int(0)
["m"]=>
int(0)
["d"]=>
int(2)
["h"]=>
int(0)
["i"]=>
int(0)
["s"]=>
int(0)
["f"]=>
float(0)
["weekday"]=>
int(0)
["weekday_behavior"]=>
int(0)
["first_last_day_of"]=>
int(0)
["invert"]=>
int(0)
["days"]=>
bool(false)
["special_type"]=>
int(0)
["special_amount"]=>
int(0)
["have_weekday_relative"]=>
int(0)
["have_special_relative"]=>
int(0)
}
參見
- DateInterval::format() - Formats the interval
- DateTime::add() - 給一個 DateTime 對像增加一定量的天，月，年，小時，分鐘 以及秒。
- DateTime::sub() - 對一個 DateTime 對像減去一定量的 日、月、年、小時、分鐘和秒。
- DateTime::diff() - Returns the difference between two DateTime objects