DatePeriod::__construct
(PHP 5 >= 5.3.0, PHP 7)
DatePeriod::__construct — Creates a new DatePeriod object
说明
$start
, DateInterval $interval
, int $recurrences
[, int $options
] )$start
, DateInterval $interval
, DateTimeInterface $end
[, int $options
] )$isostr
[, int $options
] )Creates a new DatePeriod object.
参数
-
start -
The start date of the period.
-
interval -
The interval between recurrences within the period.
-
recurrences -
The number of recurrences.
-
end -
The end date of the period.
-
isostr -
An ISO 8601 repeating interval specification.
-
options -
Can be set to
DatePeriod::EXCLUDE_START_DATEto exclude the start date from the set of recurring dates within the period.
更新日志
| 版本 | 说明 |
|---|---|
| 5.5.8 | end type changed to
DateTimeImmutable .
Previously, DateTime.
|
| 5.5.0 | start type changed to
DateTimeImmutable .
Previously, DateTime.
|
范例
Example #1 DatePeriod example
<?php
$start = new DateTime ( '2012-07-01' );
$interval = new DateInterval ( 'P7D' );
$end = new DateTime ( '2012-07-31' );
$recurrences = 4 ;
$iso = 'R4/2012-07-01T00:00:00Z/P7D' ;
// All of these periods are equivalent.
$period = new DatePeriod ( $start , $interval , $recurrences );
$period = new DatePeriod ( $start , $interval , $end );
$period = new DatePeriod ( $iso );
// By iterating over the DatePeriod object, all of the
// recurring dates within that period are printed.
foreach ( $period as $date ) {
echo $date -> format ( 'Y-m-d' ). "\n" ;
}
?> 以上例程会输出：
2012-07-01 2012-07-08 2012-07-15 2012-07-22 2012-07-29
Example #2 DatePeriod example with DatePeriod::EXCLUDE_START_DATE
<?php
$start = new DateTime ( '2012-07-01' );
$interval = new DateInterval ( 'P7D' );
$end = new DateTime ( '2012-07-31' );
$period = new DatePeriod ( $start , $interval , $end ,
DatePeriod :: EXCLUDE_START_DATE );
// By iterating over the DatePeriod object, all of the
// recurring dates within that period are printed.
// Note that, in this case, 2012-07-01 is not printed.
foreach ( $period as $date ) {
echo $date -> format ( 'Y-m-d' ). "\n" ;
}
?> 以上例程会输出：
2012-07-08 2012-07-15 2012-07-22 2012-07-29
用户评论:
[#1] lars at hp-designs dot com [2012-08-07 05:02:13]
When you add the time 23:59:59 to the end DateTime object something like the following then the end date will be included in the period:
<?php
$date_start = new DateTime('2012-03-12');
$date_end = new DateTime('2012-03-22 23:59:59');
$interval = '+2 days';
$date_interval = DateInterval::createFromDateString($interval);
$period = new DatePeriod($date_start, $date_interval, $date_end, DatePeriod::EXCLUDE_START_DATE);
foreach($period as $dt) {
echo $dt->format('d/m');
}
?>
OUTPUT:
14/03
16/03
18/03
20/03
22/03
[#2] simon dot kohlmeyer at mayflower dot de [2010-11-03 03:50:57]
I found two things useful to know that aren't covered here.
1. endDate is excluded:
<?php
$i = new DateInterval('P1D');
$d1 = new Datetime();
$d2 = clone $d1; $d2->add($i);
foreach(new DatePeriod($d1, $i, $d2) as $d) {
echo $d->format('Y-m-d H:i:s') . "\n";
}
?>
Will output:
2010-11-03 12:39:53
(Another one because I got it wrong at first)
2. For the first form, recurrences really means REcurrences, not occurences.
<?php
$i = new DateInterval('P1D');
$d = new Datetime();
foreach(new DatePeriod($d, $i, 1) as $d) {
echo $d->format('Y-m-d H:i:s') . "\n";
}
?>
Will output:
2010-11-03 12:41:05
2010-11-04 12:41:05