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DatePeriod::__construct

(PHP 5 >= 5.3.0, PHP 7)

DatePeriod::__construct — Creates a new DatePeriod object

说明

public DatePeriod::__construct ( DateTimeInterface $start , DateInterval $interval , int $recurrences [, int $options ] )

public DatePeriod::__construct ( DateTimeInterface $start , DateInterval $interval , DateTimeInterface $end [, int $options ] )

public DatePeriod::__construct ( string $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_DATE to 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 DateTimeInterface. Previously, DateTime.
5.5.0	`start` type changed to DateTimeInterface. 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：

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：

注释

Unbound numbers of repetitions as specified by ISO 8601 section 4.5 "Recurring time interval" are not supported, i.e. neither passing "R/..." as isostr nor passing NULL as end would work.

User Contributed Notes

lars at hp-designs dot com 07-Aug-2012 05:02


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

simon dot kohlmeyer at mayflower dot de 03-Nov-2010 03:50


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

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DatePeriod::__construct

说明

参数

更新日志

范例

注释

User Contributed Notes

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