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Bug #43169 Wrong date using strtotime('-1 month')
Submitted: 2007-11-01 12:29 UTC Modified: 2007-11-01 12:39 UTC
Votes:1
Avg. Score:4.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: php at dredzik dot pl Assigned:
Status: Not a bug Package: Date/time related
PHP Version: 5.2.4 OS: Windows XP SP/2
Private report: No CVE-ID: None
View Developer Edit
 [2007-11-01 12:29 UTC] php at dredzik dot pl 
Description:
------------
I use this code to generate timestamp for current and last month and everything worked fine until yesterday (31 October 2007). 

Today everything came back to normal - but when I set the date to yesterday on my system it keeps getting back. 

Reproduce code:
---------------
echo date('Y-m', strtotime('now')) . "\n";
echo date('Y-m', strtotime('-1 month'));

Expected result:
----------------
2007-10
2007-09

Actual result:
--------------
2007-10
2007-10

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 [2007-11-01 12:37 UTC] php at dredzik dot pl 
There was very similiar bug to this one reported over 2 years ago, but since no one seems to have found a solution, I'm resubmitting just to remind you about it.
 [2007-11-01 12:39 UTC] derick@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

2007-10-31 -1 month = 2007-09-31, which turns into 2007-10-01.
 
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