date() and/or strftime() broken?

**Pedro Graca** · Jul 17 '05, 04:38 AM

Re: date() and/or strftime() broken?

Erik Johnson wrote:[color=blue]
> the following script...
>
><?php
>
> $times = array(
> '2004-04-04 00:31:00-06',
> '2004-04-04 01:00:00-06',
> '2004-04-04 01:59:59-06',[/color]

As per information on http://www.timeanddate.com/

before switching over to MDT the timezone offset was -0700
[color=blue]
> '2004-04-04 02:00:00-06',[/color]

This particular time did not happen.
MDT started on the second after 2004-04-04 01:59:59 (local time -- MST)
which was 2004-04-04 03:00:00 (local time -- MDT)
[color=blue]
> '2004-04-04 03:00:00-06',
> );
>
> for ($i = 0; $i < count($times); $i++)
> {
> $s = $times[$i];
> $time_t = strtotime($s);
> print "strtotime('$s' ) = $time_t\n";
> print "date('r', $time_t) = \"" . date('r', $time_t) . "\"\n";
> print "\n";
> }
>
> ?>
>
> generates this output:
>
> strtotime('2004-04-04 00:31:00-06') = 1081060260
> date('r', 1081060260) = "Sat, 3 Apr 2004 23:31:00 -0700"[/color]

Wrong input
[color=blue]
> strtotime('2004-04-04 01:00:00-06') = 1081062000
> date('r', 1081062000) = "Sun, 4 Apr 2004 00:00:00 -0700"[/color]

Wrong input
[color=blue]
> strtotime('2004-04-04 01:59:59-06') = 1081065599
> date('r', 1081065599) = "Sun, 4 Apr 2004 00:59:59 -0700"[/color]

Wrong input
[color=blue]
> strtotime('2004-04-04 02:00:00-06') = 1081069200
> date('r', 1081069200) = "Sun, 4 Apr 2004 03:00:00 -0600"[/color]

Wrong input
[color=blue]
> strtotime('2004-04-04 03:00:00-06') = 1081069200
> date('r', 1081069200) = "Sun, 4 Apr 2004 03:00:00 -0600"[/color]

OK :)
[color=blue]
> date() seems to be picking rather arbitrary timezones for output.
> Secondly, as best as I can tell, the fourth output is just patently WRONG
> (or I'm too dense to see what's going on, but I don't think so).[/color]

Confused by timezone changes (and their respective offset)? :)
[color=blue]
> I often want to calculate a time_t value at 00:00:00 (midnight) for an
> arbitrary input time_t. I had been doing this as:
>
> $midnight = strtotime(date( 'Y-m-d', $time_t));
>
> but given the behaviour above, I don't think this works reliably. :([/color]

Let's abolish DST !!!!!

--
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**Erik Johnson** · Jul 17 '05, 04:39 AM

Re: date() and/or strftime() broken?

"Pedro Graca" <hexkid@hotpop. com> wrote:[color=blue]
> Confused by timezone changes (and their respective offset)? :)[/color]

Yes. That's it (DOH!). ;) I forgot this had happened - I happened to be
looking at date/time stuff anyway.
Was very stressed out yesterday with a number of other things - not thinking
clearly.
Thank you for your reply. :)

-ej

in message news:c4tupm$2n7 np5$1@ID-203069.news.uni-berlin.de...[color=blue]
> Erik Johnson wrote:[color=green]
> > the following script...
> >
> ><?php
> >
> > $times = array(
> > '2004-04-04 00:31:00-06',
> > '2004-04-04 01:00:00-06',
> > '2004-04-04 01:59:59-06',[/color]
>
> As per information on http://www.timeanddate.com/
>
> before switching over to MDT the timezone offset was -0700
>[color=green]
> > '2004-04-04 02:00:00-06',[/color]
>
> This particular time did not happen.
> MDT started on the second after 2004-04-04 01:59:59 (local time -- MST)
> which was 2004-04-04 03:00:00 (local time -- MDT)
>[color=green]
> > '2004-04-04 03:00:00-06',
> > );
> >
> > for ($i = 0; $i < count($times); $i++)
> > {
> > $s = $times[$i];
> > $time_t = strtotime($s);
> > print "strtotime('$s' ) = $time_t\n";
> > print "date('r', $time_t) = \"" . date('r', $time_t) . "\"\n";
> > print "\n";
> > }
> >
> > ?>
> >
> > generates this output:
> >
> > strtotime('2004-04-04 00:31:00-06') = 1081060260
> > date('r', 1081060260) = "Sat, 3 Apr 2004 23:31:00 -0700"[/color]
>
> Wrong input
>[color=green]
> > strtotime('2004-04-04 01:00:00-06') = 1081062000
> > date('r', 1081062000) = "Sun, 4 Apr 2004 00:00:00 -0700"[/color]
>
> Wrong input
>[color=green]
> > strtotime('2004-04-04 01:59:59-06') = 1081065599
> > date('r', 1081065599) = "Sun, 4 Apr 2004 00:59:59 -0700"[/color]
>
> Wrong input
>[color=green]
> > strtotime('2004-04-04 02:00:00-06') = 1081069200
> > date('r', 1081069200) = "Sun, 4 Apr 2004 03:00:00 -0600"[/color]
>
> Wrong input
>[color=green]
> > strtotime('2004-04-04 03:00:00-06') = 1081069200
> > date('r', 1081069200) = "Sun, 4 Apr 2004 03:00:00 -0600"[/color]
>
> OK :)
>[color=green]
> > date() seems to be picking rather arbitrary timezones for output.
> > Secondly, as best as I can tell, the fourth output is just patently[/color][/color]
WRONG[color=blue][color=green]
> > (or I'm too dense to see what's going on, but I don't think so).[/color]
>
> Confused by timezone changes (and their respective offset)? :)
>[color=green]
> > I often want to calculate a time_t value at 00:00:00 (midnight) for[/color][/color]
an[color=blue][color=green]
> > arbitrary input time_t. I had been doing this as:
> >
> > $midnight = strtotime(date( 'Y-m-d', $time_t));
> >
> > but given the behaviour above, I don't think this works reliably. :([/color]
>
> Let's abolish DST !!!!!
>
> --
> USENET would be a better place if everybody read: : mail address :
> http://www.catb.org/~esr/faqs/smart-questions.html : is valid for :
> http://www.netmeister.org/news/learn2quote2.html : "text/plain" :
> http://www.expita.com/nomime.html : to 10K bytes :[/color]

date() and/or strftime() broken?

date() and/or strftime() broken?

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