PHP - Function date_isodate_set()



void date_isodate_set ( DateTime $object, int $year, int $week [, int $day] )

void DateTime::setISODate ( int $year, int $week [, int $day] )

Definition and Usage

These functions sets the ISO date into the passed object.

The above two functions are equivalent and any of the functions can be used as shown below in the example.


Parameter Description
object Required. DateTime object
year Required. Year of the date.
week Required. Week of the date.
day Optional. Day of the date.

Return Value

Returns NULL on success or FALSE on failure.


Following is the usage of this function −

   $dateSrc = '2005-04-19 12:50 GMT';
   $dateTime = date_create( $dateSrc);;
   # Now set a new date using date_isodate_set();
   date_isodate_set( $dateTime, 2000, 12, 12);
   echo "New Formatted date is ". $dateTime->format("Y-m-d\TH:i:s\Z");
   echo "<br />";

   # Using second function.
   $dateTime = new DateTime($dateSrc);
   $dateTime->setISODate( 1999, 10, 12);
   echo "New Formatted date is ". $dateTime->format("Y-m-d\TH:i:s\Z");

This will produce the following result −

New Formatted date is 2000-03-31T12:50:00Z
New Formatted date is 1999-03-19T12:50:00Z