Bug #76686 [Opn->Nab]: Datetime->sub calculates incorrectly on dates late in a month

From: Date: Tue, 31 Jul 2018 08:25:30 +0000
Subject: Bug #76686 [Opn->Nab]: Datetime->sub calculates incorrectly on dates late in a month
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=76686&edit=1 ID: 76686 Updated by: peehaa@php.net Reported by: janne at consilia dot fi Summary: Datetime->sub calculates incorrectly on dates late in a month -Status: Open +Status: Not a bug Type: Bug Package: Date/time related PHP Version: 7.0.31 Block user comment: N Private report: N New Comment: June has only 30 days so it overflows into July. Previous Comments: ------------------------------------------------------------------------ [2018-07-31 08:01:21] janne at consilia dot fi Description: ------------ The PHP version is actually 7.0.30 (not in the list) The test script produces the following result: 2018-07-31 2018-07-01 2018-06-01 Test script: --------------- <?php $now = new DateTime('2018-07-31'); echo $now->format('Y-m-d') . "\n"; echo $now->sub(new DateInterval('P1M'))->format('Y-m-d') . "\n"; echo $now->sub(new DateInterval('P1M'))->format('Y-m-d') . "\n"; ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76686&edit=1

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