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DateTime::setISODate

date_isodate_set

(PHP 5 >= 5.2.0, PHP 7)

DateTime::setISODate -- date_isodate_set — Sets the ISO date

Description

Object oriented style

public DateTime::setISODate ( int $year , int $week [, int $dayOfWeek = 1 ] ) : DateTime

Procedural style

date_isodate_set ( DateTime $object , int $year , int $week [, int $dayOfWeek = 1 ] ) : DateTime

Set a date according to the ISO 8601 standard - using weeks and day offsets rather than specific dates.

Parameters

object: Procedural style only: A DateTime object returned by date_create(). The function modifies this object.
year: Year of the date.
week: Week of the date.
dayOfWeek: Offset from the first day of the week.

Return Values

Returns the DateTime object for method chaining or false on failure.

Examples

Example #1 DateTime::setISODate() example

Object oriented style

<?php
$date = new DateTime();

$date->setISODate(2008, 2);
echo $date->format('Y-m-d') . "\n";

$date->setISODate(2008, 2, 7);
echo $date->format('Y-m-d') . "\n";
?>

Procedural style

<?php
$date = date_create();

date_isodate_set($date, 2008, 2);
echo date_format($date, 'Y-m-d') . "\n";

date_isodate_set($date, 2008, 2, 7);
echo date_format($date, 'Y-m-d') . "\n";
?>

The above examples will output:

2008-01-07
2008-01-13

Example #2 Values exceeding ranges are added to their parent values

<?php
$date = new DateTime();

$date->setISODate(2008, 2, 7);
echo $date->format('Y-m-d') . "\n";

$date->setISODate(2008, 2, 8);
echo $date->format('Y-m-d') . "\n";

$date->setISODate(2008, 53, 7);
echo $date->format('Y-m-d') . "\n";
?>

The above example will output:

2008-01-13
2008-01-14
2009-01-04

Example #3 Finding the month a week is in

<?php
$date = new DateTime();
$date->setISODate(2008, 14);
echo $date->format('n');
?>