Edit report at http://bugs.php.net/bug.php?id=51096&edit=1
ID: 51096
Comment by: wayne530 at gmail dot com
Reported by: phpbugs at rizzt dot kicks-ass dot org
Summary: strtotime returns wrong results
Status: Assigned
Type: Bug
Package: Date/time related
Operating System: linux
PHP Version: 5.2.12
Assigned To: derick
New Comment:
@derick can you comment on what exactly should be the behavior of
strtotime('-1
month') or strtotime('last month')?
today 3/31/10 date('Y-m-d', strtotime('-1 month')) returns
'2010-03-03'
date('Y-m-d', strtotime('+1 month')) returns
'2010-05-01'
-1 month seems to offset by 28 days. +1 month seems to offset by 31
days. is
this correct behavior?
Previous Comments:
------------------------------------------------------------------------
[2010-03-31 15:32:08] der...@php.net
@marques: You're wrong, that's perfectly correct behaviour for last
month/previous month. It is also unrelated to this report.
------------------------------------------------------------------------
[2010-03-31 15:14:20] marques at displague dot com
This one is a clearer case of strtotime being bad:
echo date("Y-m-d",strtotime("february", strtotime("march 31 2010")));
2010-03-03
------------------------------------------------------------------------
[2010-03-31 14:33:37] marques at displague dot com
I'm not sure there would be consensus on my expected return values here,
but it
makes more sense then getting March as a result.
Reproduce code:
---------------
date_default_timezone_set('America/New_York');
echo date(DATE_RFC822,strtotime('march 31 2010 -1 month'));
echo date(DATE_RFC822,strtotime('march 30 2010 -1 month'));
echo date(DATE_RFC822,strtotime('march 29 2010 -1 month'));
echo date(DATE_RFC822,strtotime('march 28 2010 -1 month'));
Expected result:
----------------
Sun, 28 Feb 10 00:00:00 -0500
Sun, 28 Feb 10 00:00:00 -0500
Sun, 28 Feb 10 00:00:00 -0500
Sun, 28 Feb 10 00:00:00 -0500
Actual result:
----------------
Wed, 03 Mar 10 00:00:00 -0500
Tue, 02 Mar 10 00:00:00 -0500
Mon, 01 Mar 10 00:00:00 -0500
Sun, 28 Feb 10 00:00:00 -0500
------------------------------------------------------------------------
[2010-03-31 14:23:58] marques at displague dot com
This may be fodder for another bug report, but strtotime() more
specifically
"returns wrong results" for the last three days of March 2010.
date_default_timezone_set('America/New_York');
echo PHP_VERSION."\n".
date(DATE_RFC822)."\n".
date(DATE_RFC822,strtotime('last month'));
5.3.1
Wed, 31 Mar 10 08:21:30 -0400
Wed, 03 Mar 10 08:21:30 -0500
This was also posted as a PHP.net comment:
http://www.php.net/manual/en/function.strtotime.php#97065
------------------------------------------------------------------------
[2010-03-09 09:49:36] der...@php.net
Re-opening because of the question marks:
firstdayof = 'first day of'?;
lastdayof = 'last day of'?;
It shouldn't cause an issue though, but it needs fixing.
------------------------------------------------------------------------
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