Mirco-time precise DateTime(Immutable) instances.

example.php

<?php

function mirco_time_precise_date_time_immutable()
{
    return DateTimeImmutable::createFromFormat('U.u', sprintf('%.6F', microtime(true)));
}

"micro"

Via https://twitter.com/tacovdb/status/777762473218801664:

DateTimeImmutable::createFromFormat('U.u', sprintf('%.6F', microtime(true)))

Seems to be the shorter variant that produces the same results (except from some rounding errors that might come from the additional date() call):
https://3v4l.org/cQtmk

The 'rounding errors' are caused by sprintf("%06d", ($microTime - $timestamp) * 1000000) which will cast to an integer, dropping obsolete digits instead of rounding the value. Doubt that that would be significant to anybody, though ;)

Note that the time zone will not be set to the current time zone, it will default to "+00:00". This is a side-effect from creating a DateTime(Immutable) from a timestamp.