ID: 44780
Comment by: mfburdett at gmail dot com
Reported By: shawn dot parker at alttech dot com
Status: Assigned
Bug Type: Date/time related
Operating System: *
PHP Version: 5CVS-2008-08-14
Assigned To: derick
New Comment:
The originally filed reproduce code
var_dump( timezone_name_from_abbr('',-36000,1) );
and expected result 'Pacific/Honolulu' are not actually valid because
Honolulu does not observe daylight saving time. See comments above for
what look like actual bugs.
Previous Comments:
------------------------------------------------------------------------
[2008-11-07 17:33:44] mfburdett at gmail dot com
The affected population sizes of the two issues may be similar after
all: China standard time is missing from the fallbackmap (offset 8
hours, daylight saving time 0).
------------------------------------------------------------------------
[2008-11-07 17:25:33] mfburdett at gmail dot com
Looking at
http://cvs.php.net/viewvc.cgi/php-src/ext/date/lib/fallbackmap.h?revision=1.3&view=markup
it appears to be a simple bug: lookups of the fallbackmap are not
working for any of the time zones with non-integer offsets. A more
minor issue (in terms of affected population size) is that some valid
offsets are missing from the fallbackmap.
------------------------------------------------------------------------
[2008-11-06 20:22:31] mfburdett at gmail dot com
Note some of the above abbreviations are obsolete, e.g. BURT has been
replaced with MMT. But the point is timezone_name_from_abbr() does not
work for those offsets without an abbreviation.
------------------------------------------------------------------------
[2008-11-06 18:27:36] jjkd at jjkd dot com
In my testing, this is the list of offsets that do not work for PHP
5.2.6:
-34200, ckhst
-16200, ant
-12600, negt
-7200, addt
12600, irst
16200, aft
19800, ist
20700, npt
21600, aktst
23400, burt
28800, bnt
34200, cast
35100, cwst
37800, cst
39600, anat
41400, lhst
46800, anast
49500, chadt
50400, anast
------------------------------------------------------------------------
[2008-11-05 19:34:41] mfburdett at gmail dot com
Also does not return a time zone for Indian Standard Time:
timezone_name_from_abbr('', 19800, 0)
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/44780
--
Edit this bug report at http://bugs.php.net/?id=44780&edit=1
