WordPress should use setlocale() to ensure consistent string, dates, times and numbers handling

[howardtw]

I've grep thru the WordPress source and find no use of "setlocale", I think it should use a default setlocale() to ensure consistent string, dates, times and numbers handling.

For example, in Drupal, it is

setlocale(LC_ALL, 'C');

[Denis-de-Bernardy]

It's not used for good reasons. Per the PHP docs:

Warning
The locale information is maintained per process, not per thread. If you are running PHP on a multithreaded server API like IIS or Apache on Windows, you may experience sudden changes in locale settings while a script is running, though the script itself never called setlocale(). This happens due to other scripts running in different threads of the same process at the same time, changing the process-wide locale using setlocale().

​http://us2.php.net//manual/en/function.setlocale.php

[wonderboymusic]

comment:1 explains why