[wp-trac] [WordPress Trac] #26511: Introduce a locale-switching function

[WordPress Trac]

#26511: Introduce a locale-switching function
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 Reporter:  johnbillion               |       Owner:
     Type:  feature request           |      Status:  reviewing
 Priority:  normal                    |   Milestone:  4.7
Component:  I18N                      |     Version:
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by swissspidy):

 [attachment:26511.4.diff] is a new patch without the caching (at least for
 now) and a few new tests related to `_load_textdomain_just_in_time()`,
 which helped fix some bugs. Also contains some docs improvements etc. For
 the tests to work, one needs to add the files from [attachment:de_DE.zip]
 to the `tests/phpunit/data/languages` directory.

 @SergeyBiryukov: `restore_current_blog()` is confusing because it means
 "go back to the blog I was on before". Or for locales, "switch to a
 locale, and then go back".

 @GaryJ Looking at #25293, an interface would make sense, even though it's
 probably a bit too much for now for only like 2-3 public methods.

 The patch & naming on #25293 is interesting by the way. Think
 `WP_Locale_State`. Also, it has a `is_switched()` method, which maybe
 could be helpful in our case as well.

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Ticket URL: <https://core.trac.wordpress.org/ticket/26511#comment:52>
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