[php-maint] Bug#628079: php5-common: Wrong timezone selected

[Stepan Golosunov]

Control: found -1 5.4.4-14+deb7u4
Control: tags -1 - moreinfo

On Fri, May 27, 2011 at 09:05:24AM +1000, Craig Small wrote:
> Package: php5-common
> Version: 5.3.6-11
> Severity: normal
> 
> Both the apache module and cli PHP show my timezone as
> Antartica/Macquarie.  I'm not a penguin and don't live there.
> The rest of the system thinks my timezone is Australia/NSW which is
> correct.
> 
> I cannot find anywhere where it is set as it is commented out in the
> php.ini files.  If I set the timezone in my php.ini file then everything
> works correctly, but why can't php just use the system timezone like the
> rest of the computer does ok?

I am seeing similar issue with Europe/Samara being confused with
Asia/Samarkand.

# cat /etc/timezone 
Europe/Samara
# php -i|grep -i timezone
"Olson" Timezone Database Version => 0.system
Timezone Database => internal
Default timezone => Asia/Samarkand
date.timezone => no value => no value


# printf '<?php\necho date("c"), "\\n";\n'|php
2013-08-28T17:38:31+05:00
# printf '<?php\necho date("c"), "\\n";\n'|TZ=Europe/Samara php
2013-08-28T17:38:36+05:00

# printf '<?php\necho date("c"), "\\n";\n'|TZ=Europe/Moscow php
2013-08-28T16:38:40+04:00
# date 
Wed Aug 28 16:38:55 SAMT 2013
# printf '<?php\necho date("c"), "\\n";\n'|php -d date.timezone=Europe/Samara
2013-08-28T16:39:45+04:00

The last 3 variants show correct time.

After looking into use_embedded_timezonedb.patch I think that
timelib_timezone_id_from_abbr is called with "SAMT" as the first agrument.
And according to tzdata sources "SAMT" was used by Asia/Samarkand in
the past. And it even was UTC+4 before 1930. And php's zone_search
picks the first entry from timezonemap.h:

$ grep '"samt".*1440*' php5-5.4.4/ext/date/lib/timezonemap.h 
	{ "samt",  0,  14400, "Asia/Samarkand"                },
	{ "samt",  0,  14400, "Europe/Samara"                 },


Australia/Sydney has the same problem with "EST": it was used by
Antarctica/Macquarie:

$ grep '"est".*36000*' php5-5.4.4/ext/date/lib/timezonemap.h 
	{ "est",   0,  36000, "Antarctica/Macquarie"          },
	{ "est",   0,  36000, "Australia/ACT"                 },
	{ "est",   0,  36000, "Australia/Brisbane"            },
	{ "est",   0,  36000, "Australia/Canberra"            },
	{ "est",   0,  36000, "Australia/Currie"              },
	{ "est",   0,  36000, "Australia/Hobart"              },
	{ "est",   0,  36000, "Australia/LHI"                 },
	{ "est",   0,  36000, "Australia/Lindeman"            },
	{ "est",   0,  36000, "Australia/Lord_Howe"           },
	{ "est",   0,  36000, "Australia/Melbourne"           },
	{ "est",   0,  36000, "Australia/NSW"                 },
	{ "est",   0,  36000, "Australia/Queensland"          },
	{ "est",   0,  36000, "Australia/Sydney"              },
	{ "est",   0,  36000, "Australia/Tasmania"            },
	{ "est",   0,  36000, "Australia/Victoria"            },