[RFC|Merged] Switch to PHP timezone handling

[AmigoJack]

It's not that we need to actually pre-select the right time zone - the whole list could be filtered, so only time zones show up which are +/- 2 or 3 hours of the current local time. Because there is no rule that daylight saving is always 1 hour delta.

[nickvergessen]

Oleg can you rebase this on develop, there are some strange conflicts in install/database_update.php with your last commit.

[Oleg]

I got as far as plurals for now.

[nickvergessen]

I updated the branch of oleg to develop and worked a bit on it:
https://github.com/nickvergessen/phpbb3 ... z-handling

The selection is now made in 2 steps:
1. Select your current time (limits the number of timezones in step 2)
2. Select the actual timezone

javascript.png (68.64 KiB) Viewed 5001 times

Without Javascript, we can not do much, but give the hole list:

noscript.png (52.93 KiB) Viewed 5001 times

[naderman]

Sounds good.

[Oleg]

I like, I think.

[naderman]

Please make sure, the feature PR includes a functional test.

[nickvergessen]

Todo:

• Change selection in ACP
• Change selection in subsilver2
• Add function to calculate the unix timestamp of a given user date and time
• Add code to update
• Write tests

[Oleg]

From what I recall language had to be changed to use 3.1 plurals and migrations/install code needed to be written.

[nickvergessen]

I would not know, where plurals are used, but I will review it. thanks for rementioning.