PHP Manual: Returns new DateTime instance encapsulating the given DateTimeImmutable object

public static static DateTime::createFromImmutable(DateTimeImmutable $object)

object: The immutable DateTimeImmutable object that needs to be converted to a mutable version. This object is not modified, but instead a new DateTime instance is created containing the same date, time, and timezone information.

Returns a new DateTime instance.

Version	Description
8.0.0	The method returns an instance of the currently invoked class now. Previously, it created a new instance of DateTime.

Example #1 Creating a mutable date time object

<?php
$date = new DateTimeImmutable("2014-06-20 11:45 Europe/London");
$mutable = DateTime::createFromImmutable( $date );