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DatePeriod::__construct

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

DatePeriod::__constructCrea un nuevo objeto DatePeriod

Descripción

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 = ?)

Crea un nuevo objeto DatePeriod.

Parámetros

start

La fecha de inicio del periodo.

interval

El intervalo entre repeticiones dentro del periodo.

recurrences

El número de repeticiones.

end

La fecha final del periodo.

isostr

Una especificación ISO 8601 del intervalo de repetición.

options

Se puede establecer a DatePeriod::EXCLUDE_START_DATE para excluir la fecha de inicio del conjunto de fechas de repetición dentro del periodo.

Historial de cambios

Versión Descripción
5.5.8 El tipo de end se cambió a DateTimeInterface. Anteriormente era DateTime.
5.5.0 start se cambió a DateTimeImmutable. Anteriormente era DateTime.

Ejemplos

Ejemplo #1 Ejemplo de DatePeriod

<?php
$inicio 
= new DateTime('2012-07-01');
$intervalo = new DateInterval('P7D');
$fin = new DateTime('2012-07-31');
$repeticiones 4;
$iso 'R4/2012-07-01T00:00:00Z/P7D';

// Todos estos periodos son equivalentes.
$periodo = new DatePeriod($inicio$intervalo$repeticiones);
$periodo = new DatePeriod($inicio$intervalo$fin);
$periodo = new DatePeriod($iso);

// Al recorrer el objeto DatePeriod, se imprimen todas
// las fechas de repetición dentro del periodo.
foreach ($periodo as $fecha) {
    echo 
$fecha->format('Y-m-d')."\n";
}
?>

El resultado del ejemplo sería:

2012-07-01
2012-07-08
2012-07-15
2012-07-22
2012-07-29

Ejemplo #2 Ejemplo de DatePeriod con DatePeriod::EXCLUDE_START_DATE

<?php
$inicio 
= new DateTime('2012-07-01');
$intervalo = new DateInterval('P7D');
$fin = new DateTime('2012-07-31');

$periodo = new DatePeriod($inicio$intervalo$fin,
                         
DatePeriod::EXCLUDE_START_DATE);

// Al recorrer el objeto DatePeriod, se imprimen todas
// las fechas de repetición dentro del periodo.
// Observe que, en este caso, 2012-07-01 no se imprime.
foreach ($periodo as $fecha) {
    echo 
$fecha->format('Y-m-d')."\n";
}
?>

El resultado del ejemplo sería:

2012-07-08
2012-07-15
2012-07-22
2012-07-29

Notas

No se admiten repeticiones de números sin límite tal como se especifca en la sección 4.5 de la ISO 8601, "Recurring time interval", esto es, no funcionará el paso de "R/..." como isostr ni el paso de null como end.

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User Contributed Notes 4 notes

up
36
simon dot kohlmeyer at mayflower dot de
11 years ago
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
up
14
lars at hp-designs dot com
9 years ago
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
up
0
bill at bwi dot com
26 days ago
With reference to the Changelog above, 'recurrences' must be greater than 0 now.

This was not the case in PHP5 ( >= 5.3.0). A foreach loop over a DatePeriod with recurrences == 0 would
execute one time. A function could accept a $count parameter which represented the number of times to execute
the code in a foreach loop, and then initialize a DatePeriod with 'recurrences' == ($count-1) to get the desired
number of iterations.

The following example adds a special case for PHP7 and above to handle the situation where a single
iteration is desired.

Note that an alternative solution to subracting 1 from the desired count is to subtract one month from the desired starting month,      
and then intialize the DatePeriod with the option DatePeriod::EXCLUDE_START_DATE.

<?php
       
// displayCalender() is a stub.
        // In a real application, this would generate a displayable calendar for the specified month.
        //
        // $tp is a DateTime object used to specify the month for which a calendar will be displayed
       
function displayCalendar($tp)
        {
               
$format = "F, Y";
                echo
"Display Calendar for " . $tp->format($format) . "\n";
        }

       
// $date is the first month to show
        // $count is the number of months to show
        // NOTE: the number of "recurrences" is one less than the number of months to display
       
function showMonths($date = false, $count = 1)
        {
               
$format = "Y-m-d 00:00:00";
               
$init = ($date ? $date : date($format));
               
$one_month = new DateInterval("P1M");

               
// get the starting month and day
               
$start = new DateTime($init);

                echo
"Show $count month" . ($count > 1 ? "s" : "") . "\n";
               
//check for PHP7 or greater
               
if ($count == 1 && (substr(phpversion(), 0, 1) >= 7) )
                {
                       
// Special case for PHP7 when $count == 1
                       
displayCalendar($start);
                }  
                else
                {
                       
// PHP5 does not need special case, because 0 is accepted value
                        //      for number of recurrences
                       
$time_period = new DatePeriod($start, $one_month, ($count-1));
                        foreach (
$time_period as $tp)
                        {
                               
displayCalendar($tp);
                        }
                }
                echo
"\n";
        }
       
       
// Show calendar for specific month
       
$first_month = "2021-11";
       
showMonths($first_month);
       
       
// Show calendars for a full year
       
$first_month = "2021-01";
       
showMonths($first_month, 12);
?>

The above example will output:

Show 1 month
Display Calendar for November, 2021

Show 12 months
Display Calendar for January, 2021
Display Calendar for February, 2021
Display Calendar for March, 2021
Display Calendar for April, 2021
Display Calendar for May, 2021
Display Calendar for June, 2021
Display Calendar for July, 2021
Display Calendar for August, 2021
Display Calendar for September, 2021
Display Calendar for October, 2021
Display Calendar for November, 2021
Display Calendar for December, 2021
up
0
youssef dot benhssaien at gmail dot com
1 year ago
The parameter isostr should accept an ISO 8601 format, but doing this is not work :
<?php
      $dateStart
= date_create('first day of next month this year');

     
$isoStr = $dateStart ->format(DateTimeInterface::ISO8601);
     
$datePeriod = new DatePeriod("R10/{$isoStr}/P1M");
    
// Throw Exception : DatePeriod::__construct(): Unknown or bad format (R10/2020-02-01T22:52:26+0000Z/P1M)
    
     // While doing it by this way works
   
$datePeriod = new DatePeriod($dateStart , \DateInterval::createFromDateString("+1 month"), 10);
?>
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