Bug #62193 [Com]: strtotime returning wrong month
Edit report at https://bugs.php.net/bug.php?id=62193&edit=1
ID: 62193
Comment by: phpbugs at theHiltons dot net
Reported by:thomasrothwell dot 1990 at gmail dot com
Summary:strtotime returning wrong month
Status: Open
Type: Bug
Package:*Data Exchange functions
Operating System: Ubuntu 12.04 LTS & Ubuntu 10.04
PHP Version:5.3Git-2012-05-31 (Git)
Block user comment: N
Private report: N
New Comment:
Reproduced May 31st, 2013, CentOS 64Bit, PHP 5.4.15:
foreach (['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct',
'Nov', 'Dec'] as $monthName) {
echo "getdate(strtotime('$monthName'))['month'] = " .
getdate(strtotime($monthName))['month'] . "\n";
echo "getdate(strtotime('$monthName'))['mon'] = " .
getdate(strtotime($monthName))['mon'] . "\n";
}
Previous Comments:
[2012-05-31 02:25:24] thomasrothwell dot 1990 at gmail dot com
Assuming the issue is related to June only having 30 days, which then pushes it
to the next month July.
Expected: 06
Result: 07
I've only noticed this occur Today (31st of May 2012).
Altered my php.ini to use the following config as well:
date.timezone = "Australia/Sydney"
date.default_latitude = -35.308142
date.default_longitude = 149.124518
Thinking it could be a timezone issue. Also attempted use of gmdate.
What I found to work was:
Expected: 06
Result: 06
Test script:
---
https://bugs.php.net/bug.php?id=62193&edit=1
Bug #62193 [Com]: strtotime returning wrong month
Edit report at https://bugs.php.net/bug.php?id=62193&edit=1
ID: 62193
Comment by: phpbugs at thehiltons dot net
Reported by:thomasrothwell dot 1990 at gmail dot com
Summary:strtotime returning wrong month
Status: Not a bug
Type: Bug
Package:Date/time related
Operating System: Ubuntu 12.04 LTS & Ubuntu 10.04
PHP Version:5.3Git-2012-05-31 (Git)
Block user comment: N
Private report: N
New Comment:
How this is an overflow issue:
$timeStr = strtotime('Jun'); // just 'Jun'
$date = getdate($timeStr);
The date represented by $date should be in June, but it's not.
Since I didn't specify a day it shouldn't be an overflow issue.
If the day is assumed/implied by the current day then that should be documented.
I would argue that since it is not specified, the 1st of the month at 0:00:00
is
the safest assumption.
Previous Comments:
[2013-05-31 18:10:57] ahar...@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
PHP date functions will overflow out of bound values: since June 31 doesn't
exist, it becomes July 1.
----------------
[2013-05-31 15:29:50] phpbugs at theHiltons dot net
Reproduced May 31st, 2013, CentOS 64Bit, PHP 5.4.15:
foreach (['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct',
'Nov', 'Dec'] as $monthName) {
echo "getdate(strtotime('$monthName'))['month'] = " .
getdate(strtotime($monthName))['month'] . "\n";
echo "getdate(strtotime('$monthName'))['mon'] = " .
getdate(strtotime($monthName))['mon'] . "\n";
}
[2012-05-31 02:25:24] thomasrothwell dot 1990 at gmail dot com
Assuming the issue is related to June only having 30 days, which then pushes it
to the next month July.
Expected: 06
Result: 07
I've only noticed this occur Today (31st of May 2012).
Altered my php.ini to use the following config as well:
date.timezone = "Australia/Sydney"
date.default_latitude = -35.308142
date.default_longitude = 149.124518
Thinking it could be a timezone issue. Also attempted use of gmdate.
What I found to work was:
Expected: 06
Result: 06
Test script:
---
https://bugs.php.net/bug.php?id=62193&edit=1
Bug #62193 [Com]: strtotime returning wrong month
Edit report at https://bugs.php.net/bug.php?id=62193&edit=1
ID: 62193
Comment by: phpbugs at thehiltons dot net
Reported by:thomasrothwell dot 1990 at gmail dot com
Summary:strtotime returning wrong month
Status: Not a bug
Type: Bug
Package:Date/time related
Operating System: Ubuntu 12.04 LTS & Ubuntu 10.04
PHP Version:5.3Git-2012-05-31 (Git)
Block user comment: N
Private report: N
New Comment:
Fair enough. Thank you both for taking the time to respond to this.
I would love to see the docs updated to be more specific about this.
Previous Comments:
[2013-05-31 23:41:31] ras...@php.net
This is standard UNIX behaviour. You need to be explicit as you discovered. Try
the same thing in a shell script, for example:
$ date
Fri May 31 16:37:45 PDT 2013
$ date --date='+1 month' +'Next month is %B'
Next month is July
SQLite and many other tools you will come across follow this same standard
behaviour when it comes to data manipulation. It is described by GNU here:
http://www.gnu.org/software/tar/manual/html_node/Relative-items-in-date-
strings.html#SEC120
There is really no good answer to this one. We can't just assume the 1st of the
month, because then adding 1 day would be equivalent to adding 1 month on the
last day of the month. That's a huge amount of data loss. So we follow the
UNIX/GNU convention.
--------
[2013-05-31 19:37:22] phpbugs at thehiltons dot net
How this is an overflow issue:
$timeStr = strtotime('Jun'); // just 'Jun'
$date = getdate($timeStr);
The date represented by $date should be in June, but it's not.
Since I didn't specify a day it shouldn't be an overflow issue.
If the day is assumed/implied by the current day then that should be documented.
I would argue that since it is not specified, the 1st of the month at 0:00:00
is
the safest assumption.
[2013-05-31 18:10:57] ahar...@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
PHP date functions will overflow out of bound values: since June 31 doesn't
exist, it becomes July 1.
--------------------
[2013-05-31 15:29:50] phpbugs at theHiltons dot net
Reproduced May 31st, 2013, CentOS 64Bit, PHP 5.4.15:
foreach (['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct',
'Nov', 'Dec'] as $monthName) {
echo "getdate(strtotime('$monthName'))['month'] = " .
getdate(strtotime($monthName))['month'] . "\n";
echo "getdate(strtotime('$monthName'))['mon'] = " .
getdate(strtotime($monthName))['mon'] . "\n";
}
[2012-05-31 02:25:24] thomasrothwell dot 1990 at gmail dot com
Assuming the issue is related to June only having 30 days, which then pushes it
to the next month July.
https://bugs.php.net/bug.php?id=62193
--
Edit this bug report at https://bugs.php.net/bug.php?id=62193&edit=1
