date_isodate_set ($date_obj,$year, $week,$day);
| Parameter | DESCRIPTION |
|---|
| $date_obj | Required : Input date object to be assigned new value. |
| $year | Required: Year in 4 digit. |
| $week | Required: week of the year , starting from 1st week as 1 |
| $day | Optional: default value is 1 , offset from 1st day of the week |
Output is dateTime object, FALSE on failure.
Object Oriented style
First day of 2nd week of the year 2019.
$date = new DateTime();
$date->setISODate(2019, 2);
echo $date->format('Y-m-d'); // Output is 2019-01-07
3rd day of 5th week of year 2019
$date = new DateTime();
$date->setISODate(2019, 5,3);
echo $date->format('Y-m-d'); // Output is 2019-01-30
10th day of 4th week of year 2019
$date = new DateTime();
$date->setISODate(2019, 4,11);
echo $date->format('Y-m-d'); // Output is 2019-01-31
Procedural style
$date = date_create();
date_isodate_set($date, 2019, 25);
echo date_format($date, 'Y-m-d'); // Output is 2019-06-17
With $day value ( Optional )
$date = date_create();
date_isodate_set($date, 2019, 25,5);
echo date_format($date, 'Y-m-d'); // Output is 2019-06-21
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