3v4l.org

run code in 200+ php & hhvm versions
<?php var_dump(\DateTimeImmutable::createFromFormat('Y-m-d H:i:s.v', (new datetime('2019-01-06 12:34:56.789'))->format('Y-m-d H:i:s.v')));
Output for 7.3.0 - 7.4.0beta4
object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2019-01-06 12:34:56.789000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
Output for 7.1.25 - 7.2.22
bool(false)