Bug #81106 [Com]: Regression in 8.1: add() now truncate ->f

Edit report at https://bugs.php.net/bug.php?id=81106&edit=1 ID: 81106 Comment by: patrickallaert@php.net Reported by: kylekatarnls at gmail dot com Summary: Regression in 8.1: add() now truncate ->f Status: Assigned Type: Bug Package: Date/time related Operating System: Ubuntu PHP Version: master-Git-2021-06-04 (Git) Assigned To: derick Block user comment: N Private report: N New Comment: Introduced in https://github.com/php/php-src/commit/091c0920b9db057a54dc43ece6e864bce6818d5e Previous Comments: ------------------------------------------------------------------------ [2021-06-04 19:08:12] kylekatarnls at gmail dot com Me again, it's going very unexpected when using negative number: ->f = -1.234 => Add 0.766 seconds ------------------------------------------------------------------------ [2021-06-04 18:22:12] kylekatarnls at gmail dot com For the record, it's not consistent with what happen with ->s = 78 which properly add 78 seconds in both PHP 8.0 and 8.1 ------------------------------------------------------------------------ [2021-06-04 17:41:46] kylekatarnls at gmail dot com Description: ------------ An interval with ->f = 1.234 was previously understood as 1.234 second when using in DateTime::add() which sounds pretty consistent. Now it's understood as 0.234 which feels pretty unsafe. Moreover, if we dump the interval, we see ->f value is still 1.234. If ->f can now longer be >= 1, it would rather need to throw an exception rather than accepting it and be interpreted differently regarding where it's used. Test script: --------------- $dateInterval = new DateInterval('PT0S'); $dateInterval->f = 1.234; echo (new DateTimeImmutable('2000-01-01 00:00:00'))->add($dateInterval)->format('Y-m-d H:i:s.u'); Expected result: ---------------- 2000-01-01 00:00:01.234000 (What we got for PHP <= 8.0) Actual result: -------------- 2000-01-01 00:00:00.234000 (What we get now with master branch) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81106&edit=1