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PHP | date_isodate_set() Function

Last Updated : 14 Sep, 2018

The date_isodate_set() function is an inbuilt function in PHP which is used to sets the ISO (International Organization for Standardization ) date. This function set the date according to the ISO 8601 standard, using weeks and day offsets rather than specific dates.

Syntax:

Procedural style:

date_isodate_set ( $object, $year, $week, $day )

Object oriented style:

DateTime::setISODate ( $year, $week, $day )

Parameters: This function accepts four parameters as mentioned above and described below:

$object: This parameter is used in procedural style only. This parameter is created by date_create() function. The function modifies this object.
$year: This parameter is used to set year of the date.
$week:This parameter set the Week of the date.
$day: This parameter set offset from the first day of week.

Return Value: This function returns the DateTime object for method chaining on success or False on failure.

Below programs illustrate the date_isodate_set() function in PHP:

Program 1:

<?php 
$date = date_create(); 
  
date_isodate_set($date, 2018, 9); 
echo date_format($date, 'Y-m-d') . "\n"; 
  
date_isodate_set($date, 2018, 8, 17); 
echo date_format($date, 'Y-m-d') . "\n"; 
  
date_isodate_set($date, 2018, 12, 23); 
echo date_format($date, 'Y-m-d') . "\n"; 
  
date_isodate_set($date, 2015, 8, 24); 
echo date_format($date, 'Y-m-d'); 
?> 

Output:

Program 2:

<?php 
$date = new DateTime(); 
  
$date->setISODate(12, 05, 2018); 
echo $date->format('d-m-Y') . "\n"; 
  
$date->setISODate(2018, 2, 27); 
echo $date->format('Y-m-d') . "\n"; 
?> 

Output:

08-08-0017
2018-02-03

Related Articles:

Reference: http://php.net/manual/en/datetime.setisodate.php

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