Hi Folks:
Please take a moment to review the DateTime transitions RFC and vote on
it. I encourage voting on it to ensure we are all on the same page as
to how PHP will handle transitions. Voting is open through 10/31.
Read: https://wiki.php.net/rfc/datetime_and_daylight_saving_time
Vote: https://wiki.php.net/rfc/datetime_and_daylight_saving_time/vote
Thanks,
--Dan
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data intensive web and database programming
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Hi,
sorry for late comment.
You write: "The ST or DST modifiers can only be used when specifying times
during the backward transition period. Using the modifiers at other times
will throw an exception in object-oriented style code while procedural style
code will return false without triggering errors."
In my opinion this makes code more difficult as I need to check if the time is
in the transition time. In my opinion it should be ok to add (D)ST all the
time when it is (D)ST - and I don't see that it should be wrong (but I don't
know enough about standard formats). Just ignore it internally if you don't
need that information.
Thomas
Am Dienstag, 25. Oktober 2011 17:06:38 schrieb Daniel Convissor:
Hi Folks:
Please take a moment to review the DateTime transitions RFC and vote on
it. I encourage voting on it to ensure we are all on the same page as
to how PHP will handle transitions. Voting is open through 10/31.Read: https://wiki.php.net/rfc/datetime_and_daylight_saving_time
Vote: https://wiki.php.net/rfc/datetime_and_daylight_saving_time/voteThanks,
--Dan
--
T H E A N A L Y S I S A N D S O L U T I O N S C O M P A N Y
data intensive web and database programming
http://www.AnalysisAndSolutions.com/
4015 7th Ave #4, Brooklyn NY 11232 v: 718-854-0335 f: 718-854-0409
Hi!
Please take a moment to review the DateTime transitions RFC and vote on
it. I encourage voting on it to ensure we are all on the same page as
to how PHP will handle transitions. Voting is open through 10/31.
Reading this RFC, I have some questions:
-
Would this ST/DST be used on format() too? If yes, then we;d get a
format that nobody but PHP can parse. If no, then we don't have
roundtrip for format/parse to read the same date as you wrote. -
What is the intended use case for this syntax? I.e., if I am getting
a date from somewhere, how this ST/DST is getting there? It can't come
from the UI since no user and no external system would know how to
generate these, and if it's supposed to be generated by the code, we get
kind of chicken-and-egg problem here - to generate right ST/DST suffix,
we already need to know what this date string says. So I'm a bit unclear
on the use case here, especially if you're proposing to throw exceptions
if the times are out of very specific hour - that means to create this
suffix I'd have to know if we're in this hour or not - but how would I
know that?
--
Stanislav Malyshev, Software Architect
SugarCRM: http://www.sugarcrm.com/
(408)454-6900 ext. 227
Please take a moment to review the DateTime transitions RFC and vote
on it. I encourage voting on it to ensure we are all on the same
page as to how PHP will handle transitions. Voting is open through
10/31.Reading this RFC, I have some questions:
- Would this ST/DST be used on format() too? If yes, then we;d get a
format that nobody but PHP can parse. If no, then we don't have
roundtrip for format/parse to read the same date as you wrote.
No, why would it show up in format? The problem with expressing date and
time when they exist twice is just an annoyance, and it's difficult to
do a roundtrip in any case. We can add a format argument for it though,
but I am not sure how useful that is.
- What is the intended use case for this syntax? I.e., if I am getting a date
from somewhere, how this ST/DST is getting there? It can't come from the UI
since no user and no external system would know how to generate these, and if
it's supposed to be generated by the code, we get kind of chicken-and-egg
problem here - to generate right ST/DST suffix, we already need to know what
this date string says. So I'm a bit unclear on the use case here, especially
if you're proposing to throw exceptions if the times are out of very specific
hour - that means to create this suffix I'd have to know if we're in this hour
or not - but how would I know that?
If you don't know it, don't pass it in! Then PHP will guess, just as it
does now and always has done. It's just an extra help in case you need
to be specific about whether you want the ST or DST variant of "02:30".
You can just use EDT/EST anyway, and that would work too (but of course
not set a tz=3 timezone on the object).
Derick
--
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Hi!
If you don't know it, don't pass it in! Then PHP will guess, just as it
does now and always has done. It's just an extra help in case you need
to be specific about whether you want the ST or DST variant of "02:30".You can just use EDT/EST anyway, and that would work too (but of course
not set a tz=3 timezone on the object).
That's what I don't understand - so in the real code, what would be the
use case where I'd want to use ST/DST? I.e., if I know the exact time, I
could just use the timestamp or GMT time which doesn't have transitions.
If I know only the formatted string, how I know if I should add ST/DST
or not? I'm a bit unclear on that - how I can make a code that would be
able to use this syntax.
Stanislav Malyshev, Software Architect
SugarCRM: http://www.sugarcrm.com/
(408)454-6900 ext. 227
Hi Stas:
That's what I don't understand - so in the real code, what would be
the use case where I'd want to use ST/DST? I.e., if I know the exact
time, I could just use the timestamp or GMT time which doesn't have
transitions.
Yeah, this stuff is very edge case. It is for use when one needs to
have the transition information and create a time zone object that's in
the repeated period during a backward transition. One case it's needed
is in unit testing DateTime.
Thanks,
--Dan
--
T H E A N A L Y S I S A N D S O L U T I O N S C O M P A N Y
data intensive web and database programming
http://www.AnalysisAndSolutions.com/
4015 7th Ave #4, Brooklyn NY 11232 v: 718-854-0335 f: 718-854-0409