php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #78355 Getting the last day of a given month failing at months of 31 days
Submitted: 2019-07-31 02:11 UTC Modified: 2019-07-31 02:21 UTC
From: belbayar at mobicom dot mn Assigned:
Status: Not a bug Package: Date/time related
PHP Version: 7.3Git-2019-07-31 (Git) OS: Centos 7
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: belbayar at mobicom dot mn
New email:
PHP Version: OS:

 

 [2019-07-31 02:11 UTC] belbayar at mobicom dot mn 
Description:
------------
I have a problem like this. For a given date I need to get the last day of the previous month. 

For example 
today is 2019-07-31, I needed date is 2019-06-30 



Test script:
---------------
echo date('Y-m-t', strtotime("2019-07-31" . '-1 months'));
echo date("Y-m-d", strtotime("-1 Month"));

Expected result:
----------------
2019-07-31
2019-07-01

Actual result:
--------------
2019-06-30
2019-06-01 or 2019-06-30

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2019-07-31 02:21 UTC] requinix@php.net
-Status: Open +Status: Not a bug
 [2019-07-31 02:21 UTC] requinix@php.net 
Your Expected and Actual are backwards.

2019-07-31 - 1 month = 2019-06-31 which overflows to 2019-07-01.

strtotime() supports a lot of expressions. One of them fits your needs exactly.
https://www.php.net/manual/en/datetime.formats.relative.php
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Tue Nov 04 21:00:01 2025 UTC