Bug #51096 [Com]: strtotime returns wrong results

Edit report at http://bugs.php.net/bug.php?id=51096&edit=1

 ID:               51096
 Comment by:       marques at displague 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:

This one is a clearer case of strtotime being bad:

echo date("Y-m-d",strtotime("february", strtotime("march 31 2010")));
2010-03-03


Previous Comments:
------------------------------------------------------------------------
[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] [email protected]

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.

------------------------------------------------------------------------
[2010-03-06 17:05:05] [email protected]

This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.



------------------------------------------------------------------------
[2010-03-06 17:04:57] [email protected]

Automatic comment from SVN on behalf of derick
Revision: http://svn.php.net/viewvc/?view=revision&revision=295892
Log: - Fixed bug #51096 ('last day' and 'first day' are handled
incorrectly when
  parsing date strings).
- For 5.2 I just added the test case minus new 5.3 additions.

------------------------------------------------------------------------


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    http://bugs.php.net/bug.php?id=51096


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