From:             a dot schilder at gmx dot de
Operating system: Windows7
PHP version:      5.5.4
Package:          Date/time related
Bug Type:         Bug
Bug description:DateTime('firstday') creates wrong result

Description:
------------
Following the documentation, creating a new DateTime instance with the
realtive format "first day" (without month) should result in "the day of
the first of the current month" (although it's recommended to use it
with the optional month):
http://php.net/manual/en/datetime.formats.relative.php

In my tests (also in PHP 5.3.27 and PHP 5.4.7) a wrong date was created.
As far as I can see, it's always the current time + 1 day.

Test script:
---------------
<?php
echo PHP_VERSION . "\r\n";
$datetime1 = new DateTime('now');
echo $datetime1->format('Y-m-d H:i:s') . "\r\n";
$datetime2 = new DateTime('first day of this month');
echo $datetime2->format('Y-m-d H:i:s') . "\r\n";
$datetime3 = new DateTime('first day');
echo $datetime3->format('Y-m-d H:i:s') . "\r\n";

Expected result:
----------------
2013-09-30:
5.5.4
2013-09-30 07:59:29
2013-09-01 07:59:29
2013-09-01 07:59:29

2013-10-01:
5.5.4
2013-10-01 07:59:29
2013-10-01 07:59:29
2013-10-01 07:59:29

2013-10-02:
5.5.4
2013-10-02 07:59:29
2013-10-01 07:59:29
2013-10-01 07:59:29

Actual result:
--------------
2013-09-30:
5.5.4
2013-09-30 07:59:29
2013-09-01 07:59:29
2013-10-01 07:59:29

2013-10-01:
5.5.4
2013-10-01 07:59:29
2013-10-01 07:59:29
2013-10-02 07:59:29

2013-10-02:
5.5.4
2013-10-02 07:59:29
2013-10-01 07:59:29
2013-10-03 07:59:29

-- 
Edit bug report at https://bugs.php.net/bug.php?id=65807&edit=1
-- 
Try a snapshot (PHP 5.4):   
https://bugs.php.net/fix.php?id=65807&r=trysnapshot54
Try a snapshot (PHP 5.5):   
https://bugs.php.net/fix.php?id=65807&r=trysnapshot55
Try a snapshot (trunk):     
https://bugs.php.net/fix.php?id=65807&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=65807&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=65807&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=65807&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=65807&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=65807&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=65807&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=65807&r=notwrong
Not enough info:            
https://bugs.php.net/fix.php?id=65807&r=notenoughinfo
Submitted twice:            
https://bugs.php.net/fix.php?id=65807&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=65807&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=65807&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=65807&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=65807&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=65807&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=65807&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=65807&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=65807&r=mysqlcfg

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