From:             
Operating system: 
PHP version:      5.3.6
Package:          Date/time related
Bug Type:         Bug
Bug description:DateTime sub problem

Description:
------------
DateTime::sub() does not work on objects created by a date string. If the
object 

is created by timestamp it works.

Test script:
---------------
<?php                                                                      
                                          

$dt = new DateTime('first day of this month');                             
                                          

                                                                           
                                          

// correct output: "2011-04-01 22:41:17"                                   
                                                               

var_dump($dt);                                                             
                                          

                

// wrong output: "2011-04-01 22:41:17"                                     
                                                       

var_dump($dt->sub(new DateInterval('P2D')));                               
                                          

                                                                           
                                          

// correct output: "2011-03-30 20:41:17"                                   
                                                   

var_dump(date_create('@' . $dt->getTimestamp())->sub(new
DateInterval('P2D')));


-- 
Edit bug report at http://bugs.php.net/bug.php?id=54579&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=54579&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=54579&r=trysnapshot53
Try a snapshot (trunk):              
http://bugs.php.net/fix.php?id=54579&r=trysnapshottrunk
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=54579&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=54579&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=54579&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=54579&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=54579&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=54579&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=54579&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=54579&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=54579&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=54579&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=54579&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=54579&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=54579&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=54579&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=54579&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=54579&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=54579&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=54579&r=mysqlcfg

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