Micro-second

Micro-seconds are one thousandth of a second. They are accessible in different ways:

• Datetime and DateTimeImmutable objects, for dates

• microtime() for dates

• hrtime() for intervals

Do not use date() to get micro-seconds, as the function always returns 0.

<?php

$ms = (new Datetime()->format('u'));

$ms = microtime(true);

?>

Related : microtime(), hrtime(), DateTime, DateTime