Edit report at https://bugs.php.net/bug.php?id=49115&edit=1
ID: 49115
Comment by: anto dot justus at gmail dot com
Reported by: php at davidstockton dot com
Summary: date('M', strtotime('February')) prints "March"
Status: Bogus
Type: Bug
Package: Date/time related
Operating System: Windows XP/Linux
PHP Version: 5.2.10
Block user comment: N
Private report: N
New Comment:
hi..
You have used date("M", mktime(0, 0, 0, $i))
In this issue there is no initialization of date so it took 30 as default
initialize date it will check for the availability of the date, if it is
available it will consider the month or it will not take month in account.
for example you can check the diff with using :
date("M", mktime(0, 0, 0, $i,[2011])); it will consider only the month which
have 30 and more days - default [30]
date("M", mktime(0, 0, 0, $i,30,[2011])); it will consider only the month which
have 30 and more days
date("M", mktime(0, 0, 0, $i,31,[2011])); it will consider only the month which
have 31 and more days
date("M", mktime(0, 0, 0, $i,1,[2011])); it will consider only the month which
have 1 and more days
The calendar has 12 months with 30 or 31 days except February. So february is
exception in this case. ( february have less than 30 days)
The possible solution will be of using 1 as the 5th argument to initialize the
month.
you need to make a not of initializing the month to 1, since 1st is common to
all the 12 months.
you can use :
date("M", mktime(0, 0, 0, $i,1,[2011]));
year is optional it will take current year as default.
Previous Comments:
------------------------------------------------------------------------
[2009-07-31 14:58:54] php at davidstockton dot com
Sorry to belabor the point, but why is "February 2009" reset to February 1,
2009 (since the day is not provided), but "February" is not? In that case the
current year is used (not provided) and the current day is used (also not
provided). In the February 2009 example the day is not provided, but the day
is reset to 1 which I think is a reasonable adjustment. I would think that
February with an implied year matching the current year should behave the same
as February with an implied year (no provided year).
Thank you again.)
------------------------------------------------------------------------
[2009-07-31 08:34:03] [email protected]
Yup, that's correct. With the "month year" format, we reset the day to 1.
------------------------------------------------------------------------
[2009-07-31 03:55:41] php at davidstockton dot com
I guess my above assumption is not correct either which means there's something
else going on that I don't understand. For example,
<?php
echo date('F', strtotime('February 2009')), "\n";
echo date('F', strtotime('February 1')), "\n";
?>
Both lines output the expected "February" even though I've not specified a day
of the month in the first scenario but the timestamp given by strtotime
corresponds to February 1, 2009. If the function fills in the defaults from
the current date, I'd expect to still see March for the 1st line.)
------------------------------------------------------------------------
[2009-07-31 02:57:44] php at davidstockton dot com
Interesting. So I'd guess that if I run this same test tomorrow, I'll be seeing
January
March
March
May
May
July
July
August
October
October
December
December
I think I understand why it would be doing this, but it still seems pretty
weird. Is the assumption that strtotime fills in every part of the date/time
with whatever the current time happens to be correct?)
------------------------------------------------------------------------
[2009-07-30 23:29:17] [email protected]
date() is doing what it is supposed to. You are passing it a timestamp in
March.
strtotime() returns a timestamp in March because you have not been specific
enough. When you just give it a month and nothing else, it makes some
assumptions. For example, it takes the current year and the current date. So,
you are asking strtotime for February 30, 2009 which actually doesn't exist
since February doesn't have 30 days, so it gives you the closest match which is
March 2nd.
Not a bug. You just have to be more explicit. Like "February 1"
------------------------------------------------------------------------
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