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Old 10-03-2007, 10:18 AM   #1
georgewr3
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DST/Time zone question


I'm trying to get DST for East Brazil working correctly with SuSe 10.2, PHP 5.2 and PostGreSQL 8.1.5. Apparently a change was made very recently in Brazil to move the beginning of DST there from 10/20-10/21 to 10/13-10/14. (They switch right at midnight to 1am in the fall, and 11pm in the spring - opposite of the U.S.)

I have updated the timezone files via the zic command and placed the files at /usr/share/zoneinfo and /usr/share/postgresql/timezone. When I run a PostGreSQL shell and execute selects, the DST does occur at 10/13-10/14. Before I updated the timezone files, the queries showed the DST change at 10/20-10/21 which was correct up until the recent change in Brazilian DST. I got the newest timezone files from ftp://elsie.nci.nih.gov/pub/tzdata2007h.tar.gz which has the lastest Brazilian change.

However when using PHP's date function (which defers to O/S) it shows the DST change at Nov. 4th rather than 10/14. I have YAST set to Brazil East.

Is there another O/S patch that I need to get?

Thanks for any help.
 
Old 10-04-2007, 03:33 AM   #2
Tinkster
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Hi, and welcome to LQ!

A quick google for "php timezone DST wrong" suggests that there
are buggy PHP versions out there ...


Cheers,
Tink
 
Old 10-04-2007, 09:28 AM   #3
georgewr3
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Thank you.

I searched as well but didn't find anything conclusive. I did see that the last mention of DST was with version 5.0 of PHP but I'm using 5.2. I would think that apps would defer to the O/S to get the time to provide a single point of success/failure. Did you see a specific mention of this being a PHP failure?
 
Old 10-04-2007, 12:58 PM   #4
Tinkster
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Quote:
I searched as well but didn't find anything conclusive. I did see that the last mention of DST was with version 5.0 of PHP but I'm using 5.2.
I saw references to varied versions of 5 (5.0 - 5.1.5), and
many people stating that things were normal with 4.x ... and
reports that it was working 5.1.6.

Maybe a bug was re-introduced in the 5.2 you're using?

Quote:
Did you see a specific mention of this being a PHP failure?
Well ... if the OS reports the correct time, and the RDBMS
reports the correct time; but the PHP code doesn't. PHP
looks like a quite probable candidate. Did you restart
your machine after patching the time-zone file? Or at least
made sure that all services got restarted? Theoretically
it could still be apache, but you should see that in apache's
log; and you can test PHP from the command-line just for
good measure.

Code:
$ date;php -r "echo strftime('%Y-%m-%d %H:%M:%S %Z%n');";php --version
Cheers,
Tink

Last edited by Tinkster; 10-04-2007 at 01:02 PM. Reason: second half
 
Old 10-04-2007, 01:09 PM   #5
georgewr3
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It appears it is indeed a problem with PHP specifically. For some strange reason versions after 5.1 now ship with their own version of the timezone database.

http://derickrethans.nl/the_y2k7_problem.php

I can't think of a reason why that's desireable since it's one more thing that can break.

I appreciate the follow up, thank you.
 
Old 10-04-2007, 01:11 PM   #6
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*sigh*

I never liked PHP much, and that's just another good reason ;}

Thanks for finding that one - I'm sure it will be handy for
others to know as well!


Cheers,
Tink
 
Old 10-11-2007, 03:52 PM   #7
georgewr3
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The problem has been fixed.

http://pecl.php.net/get/timezonedb

timezonedb-2007.8 should fix the problem.
 
  


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