PHP date_isodate_set() Function Usage and Example

PHP Date & Time Function Manual

date_isodate_set() function sets ISO date

Definition and Usage

date_isodate_set()Function is DateTime::setISODate Alias. This function can be used to set ISO date. With ISO 8601 Set the date in a standard format, using the offset of the week and day as parameters instead of the month and day.

Syntax

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

Parameter

Return Value

Returns the modified DateTime object, this function will return a boolean valuefalse.

PHP Version

This function was originally introduced in PHP version5.2introduced in version 5.3.0 and is available in all higher versions.

Online Example

The following examples demonstratedate_isodate_setUsage of the function-

<?php
　　　//Create Date
　　　$date = new DateTime();
　　　//to set ISO date
　　　date_isodate_set($date,　2019, 03,　3);　　　
　　　print("Date: " . date_format($date, "Y/m/d"));
?>

Output Result

Date:　2019/01/16

Online Example

The following example creates a DateTime object and usesdate_isodate_set()The function modifies its date.-

<?php
　　　//Date String
　　　$date_string = "25-09-1999";
　　　//Create a DateTime object
　　　$date_time_Obj = date_create($date_string);
　　　print("Original Date: " . date_format($date_time_Obj, "Y/m/d"));
　　　print("\n");
　　　//Set Date
　　　$date = date_isodate_set($date_time_Obj,　2015,　4,　3　);　　　
　　　print("Modified Date: " . date_format($date, "Y/m/d"));
?>

Output Result

Original Date:　1999/09/25
Modified Date:　2015/01/21

Online Example

If the day and week values you pass to this function are out of range, they will be added to the parent value-

<?php
　　　//Create Date
　　　$date = new DateTime();
　　　//Set Date
　　　date_isodate_set($date,　2019,　15,　17);　　　
　　　print("Date: " . date_format($date, "Y/m/d"));
?>

This will produce the following output-

Date:　2019/04/24

Online Example

<?php
　　　$dateSrc = '2005-04-19　12:50 GMT';
　　　$dateTime = date_create($dateSrc);;
　　　
　　　#Now use date_isodate_set() to set the new date;
　　　date_isodate_set( $dateTime,　2000,　12,　12);
　　　
　　　echo "The new formatted date is " . $dateTime->format("Y-m-d\TH:i:s\Z");
　　　echo "<br>";
　　　#Use the second function.
　　　$dateTime = new DateTime($dateSrc);
　　　$dateTime->setISODate(　1999,　10,　12);
　　　
　　　echo "The new formatted date is " . $dateTime->format("Y-m-d\TH:i:s\Z");
?>

This will produce the following output-

The new formatted date is　2000-03-31T12:50:00Z
The new formatted date is　1999-03-19T12:50:00Z