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Bug #70926 Negative time period in DateInterval::createFromDateString
Submitted: 2015-11-17 08:49 UTC Modified: 2015-11-17 11:12 UTC
From: red dot led0 at gmail dot com Assigned:
Status: Not a bug Package: Date/time related
PHP Version: 5.6.15 OS: Linux
Private report: No CVE-ID: None
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 [2015-11-17 08:49 UTC] red dot led0 at gmail dot com 
Description:
------------
Passing negative time period to DateInterval::createFromDateString causes to creating DateInterval with negative values instead setting 'invert' flag

Test script:
---------------
$period = \DateInterval::createFromDateString('-1 day');
var_dump($period->d, $period->invert);

Expected result:
----------------
int(1)
int(1)

Actual result:
--------------
int(-1)
int(0)

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 [2015-11-17 11:12 UTC] derick@php.net
-Status: Open +Status: Not a bug
 [2015-11-17 11:12 UTC] derick@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

This is correct. The "invert" property is only used when you compare two DateTime objects and the first one is after the second one.
 
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