Bug #78091 [NEW]: DateTime - subtraction of 1 month return first day of actual month

From: Date: Fri, 31 May 2019 11:27:36 +0000
Subject: Bug #78091 [NEW]: DateTime - subtraction of 1 month return first day of actual month
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-221057@lists.php.net to get a copy of this message
From:             jan dot zenisek at outlook dot com
Operating system: Win 10 / Ubuntu Server
PHP version:      Irrelevant
Package:          Date/time related
Bug Type:         Bug
Bug description:DateTime - subtraction of 1 month return first day of actual month

Description:
------------
DateTime->modify

When I subtract 1 month from new DateTime (today is 5th May 2019), I got
wrong Date (1st May 2019) but I was expecting April.

Test script:
---------------
var_dump((new \DateTime())->modify('-1 months'));


-- 
Edit bug report at https://bugs.php.net/bug.php?id=78091&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=78091&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=78091&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=78091&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=78091&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=78091&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=78091&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=78091&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=78091&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=78091&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=78091&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=78091&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=78091&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=78091&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=78091&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=78091&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=78091&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=78091&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=78091&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=78091&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=78091&r=mysqlcfg



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