1--TEST-- 2Bug #81106: Regression in 8.1: add() now truncate ->f 3--FILE-- 4<?php 5$dateInterval = new DateInterval('PT0S'); 6$dateInterval->f = 1.234; 7 8echo (new DateTimeImmutable('2000-01-01 00:00:00'))->add($dateInterval)->format('Y-m-d H:i:s.u'); 9?> 10--EXPECT-- 112000-01-01 00:00:01.234000 12