Modify microseconds of a PHP DateTime object
This seems to have been available since 7.1.0-rc4
$dt = new DateTime('2020-01-01 0:00');
$dt->modify('+500 ms'); // Milliseconds.
$dt->modify('+123456 usec'); // Microseconds.
$dt->modify('+123456 microseconds'); // This works too.
Can't find it in the PHP manual though.
You can't.
There are three methods that can modify the value of a DateTime
instance: add
, sub
and modify
. We can rule out add
and sub
immediately because they work in terms of a DateInterval
which does not have sub-second precision.
modify
accepts a string in one of the standard recognized formats. Of those formats, only the relative ones are of interest here because the other ones work in an absolute manner; and there is no relative format that allows tweaking the msec part (that unit is not recognized).
as of PHP 7.1 DateTime::setTime() supports microseconds.