The DateTimeImmutable::setISODate() function is an inbuilt function in PHP which is used to sets the ISO (International Organization for Standardization ) date into the created DateTimeImmutable object. This function sets the date according to the ISO 8601 standard, using weeks and day offsets rather than specific dates.
Syntax:
DateTimeImmutable DateTimeImmutable::setISODate( int year, int week, int day) )
Parameters: This function accepts three parameters as mentioned above and described below:
- year: This parameter holds the year value in integer format.
- week: This parameter holds the week value in integer format .
- day: This parameter holds the day value in integer format ..
Return Values: This function returns a new date.
Below programs illustrate the DateTimeImmutable::setISODate() function in PHP:
Program 1:
<?php // PHP program to illustrate DateTimeImmutable::setISODate() // function     // Creating a new DateTimeImmutable() object $datetimeImmutable = new DateTimeImmutable();   // Initialising year, week and day $Year = '2019'; $Week = '10'; $Day = '03';   // Calling the DateTimeImmutable::setISODate() function $a = $datetimeImmutable->setISODate($Year, $Week, $Day);   // Getting a new set of date in the // format of 'Y-m-d' echo $a->format('Y-m-d'); ?> |
Output:
2019-03-06
Program 2:
<?php // PHP program to illustrate DateTimeImmutable::setISODate() // function     // Creating a new DateTimeImmutable() object $datetimeImmutable = new DateTimeImmutable();   // Calling the setISODate() function // with parameters like years of 2019, // week of 9 and day of 3 $a = $datetimeImmutable->setISODate(2019, 9, 03);   // Getting a new set of date in the // format of 'Y-m-d' echo $a->format('Y-m-d'); ?> |
Output:
2019-02-27
Reference: https://www.php.net/manual/en/datetimeimmutable.setisodate.php
