From:             noisex at apollo dot lv
Operating system: FreeBSD 6.2
PHP version:      5.2.2
PHP Bug Type:     Date/time related
Bug description:  strtotiem bug

Description:
------------
On months with 31th day the strtotime function with +/-$foo month
calculates wrong. it calculates -30 days not 31 days.

Reproduce code:
---------------
Simple example (running today 31 May):

<?php
for($i=1; $i<=12; $i++) {
echo date("Y-M",strtotime("-$i months"))."<br>";
}
?>

Expected result:
----------------
2007-Mar
2007-Feb
2007-Jan
2006-Dec
2006-Nov
2006-Oct
2006-Sep
2006-Aug
2006-Jul
2006-Jun
2006-May
2006-Apr

Actual result:
--------------
2007-May
2007-Mar
2007-Mar
2007-Jan
2006-Dec
2006-Dec
2006-Oct
2006-Oct
2006-Aug
2006-Jul
2006-Jul
2006-May

-- 
Edit bug report at http://bugs.php.net/?id=41547&edit=1
-- 
Try a CVS snapshot (PHP 4.4): 
http://bugs.php.net/fix.php?id=41547&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): 
http://bugs.php.net/fix.php?id=41547&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=41547&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=41547&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=41547&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=41547&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=41547&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=41547&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=41547&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=41547&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=41547&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=41547&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=41547&r=globals
PHP 3 support discontinued:   http://bugs.php.net/fix.php?id=41547&r=php3
Daylight Savings:             http://bugs.php.net/fix.php?id=41547&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=41547&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=41547&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=41547&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=41547&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=41547&r=mysqlcfg

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