With the introduction of user-specific languages in [38705] it's necessary to be able to switch translations on the fly. For example emails should be sent in the language of the recipient and not the one of the current user.
This introduces a new `WP_Locale_Switcher` class which is used for switching locales and translations. It holds the stack of locales whenever `switch_to_locale( $locale )` is called. With `restore_previous_locale()` you can restore the previous locale. `restore_current_locale()` empties the stack and sets the locale back to the initial value.
`switch_to_locale()` is added to most of core's email functions, either with the value of `get_locale()` (site language) or `get_user_locale()` (user language with fallback to site language).
Props yoavf, tfrommen, swissspidy, pbearne, ocean90.
See #29783.
Fixes#26511.
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By enabling the user to select their preferred locale when editing the profile, we allow for greater personalization of the WordPress admin and therefore a better user experience.
The back end will be displayed in the user's individual locale while the locale used on the front end equals the one set for the whole site. If the user didn't specify a locale, the site's locale will be used as a fallback. The new `locale` property of the `WP_User` class can be used to retrieve the user's locale setting.
Props ocean90, ipm-frommen, swissspidy.
Fixes#29783.
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`load_theme_textdomain()`, `load_plugin_textdomain()` and `load_muplugin_textdomain()` now try to load the .mo file from the `wp-content/languages` directory first. After the introduction of language packs, translation files are more likely to be located there.
Props swissspidy, sebastian.pisula.
Fixes#34213.
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Known functions, classes, and methods are now auto-linked in Code Reference pages following #meta1483.
Note: Hook references are still linked via inline `@see` tags due to the unlikelihood of reliably matching for known hooks based on a RegEx pattern.
See #32246.
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The `_network_option()` parameter order will be changing to accept `$network_id` first. The `_site_option()` functions will remain in use throughout core as our way of retrieving a network option for the current network.
See #28290.
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The `WP_INSTALLING` constant is a flag that WordPress sets in a number of
places, telling the system that options should be fetched directly from the
database instead of from the cache, that WP should not ping wordpress.org for
updates, that the normal "not installed" checks should be bypassed, and so on.
A constant is generally necessary for this purpose, because the flag is
typically set before the WP bootstrap, meaning that WP functions are not yet
available. However, it is possible - notably, during `wpmu_create_blog()` -
for the "installing" flag to be set after WP has already loaded. In these
cases, `WP_INSTALLING` would be set for the remainder of the process, since
there's no way to change a constant once it's defined. This, in turn, polluted
later function calls that ought to have been outside the scope of site
creation, particularly the non-caching of option data. The problem was
particularly evident in the case of the automated tests, where `WP_INSTALLING`
was set the first time a site was created, and remained set for the rest of the
suite.
The new `wp_installing()` function allows developers to fetch the current
installation status (when called without any arguments) or to set the
installation status (when called with a boolean `true` or `false`). Use of
the `WP_INSTALLING` constant is still supported; `wp_installing()` will default
to `true` if the constant is defined during the bootstrap.
Props boonebgorges, jeremyfelt.
See #31130.
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* Corrects phrasing used in the descriptions for and filters in `_n()` and `_nx()`, particularly with regard to the use of 'singular' instead of 'single' or '1', and 'plural' instead of 'not 1'.
* Adds example usage to `_n()`, `_nx()`, `_nx_noop()`, and `translate_nooped_plural()`.
* Adds hash notation `@return` doc for `_n_noop()` and `_nx_noop()`.
* Adds missing default values for the optional `$domain` parameter in several places.
Props johnbillion.
Fixes#34127.
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* A variant of a language has its own locale, for example the locale of the formal variant of German is `de_DE_formal`.
* Update `remove_accents()` and some CSS rules to support `de_DE_formal`.
* Add tests for `get_bloginfo( 'language' )`.
* API changes will be deployed over the next few days.
see #28303.
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Affects DocBlocks for the following core elements:
* Markdown-indent a code snippet in the file header for wp-admin/install-helper.php
* Add markdown formatting and two inline `@see` tags to the description for `translate()`
* Markdown-indent a code snippet in the description for `_n_noop()`
* Remove HTML tags from the summary for `get_media_embedded_in_content()`
* Remove an HTML tag from the summary for `wpview_media_sandbox_styles()`
Props rarst.
See #30473.
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* Add a missing `@return` description for `load_default_textdomain()`
* Clarify the `@param` description for `$locale` with an inline `@see` tag
* Ensure the correct parameter variable is used when documenting `$args` for `wp_dropdown_languages()`
Props camdensegal.
Fixes#30385.
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The language dropdown now includes installed languages and all available translations when the filesystem is writable by WordPress.
Go to wp-admin/options-general.php, select one of the available translations, submit the form and let WordPress handle the rest.
Works for Multisite's Default Language too.
see #29395.
Built from https://develop.svn.wordpress.org/trunk@30335
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* The WPLANG constant is no longer needed. Remove define('WPLANG', ''); from wp-config-sample.php. Populate WPLANG option based on the WPLANG constant. When get_option('WPLANG') is an empty string it will override WPLANG.
* Introduce translations_api() which is available to communicate with the translation API. Move translation install related functions to a new file.
* Replace mu_dropdown_languages() with wp_dropdown_languages(). wp_dropdown_languages() is now populated by the translation API.
* Remove wp_install_load_language() and allow load_default_textdomain() to switch a core translation.
fixes#13069, #15677, #19760, #28730, #29281.
Built from https://develop.svn.wordpress.org/trunk@29630
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Various improvements:
* Adds `@see` reference for `wp_list_comments()` in 'wp_list_comments_args' filter docs, added in [28285]
* Various phpDoc tweaks for the 'run_wptexturize' filter docs, added in [28715]
* Sentence and wrapping changes for `is_https_url()`, added in [28894]
* Documents the `$args` parameter for `wp_dropdown_languages()`, added in [29007]
* Adds a period to the parameter description for `_update_posts_count_on_delete()`, added in [28835]
* Documents a global in `is_customize_preview()`, added in [28999]
* phpDoc tweaks, adds an access modifier for `wpdb::esc_like()`, added in [28711]
See #28885.
Built from https://develop.svn.wordpress.org/trunk@29163
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Dominik Schilling
Pascal Birchler
Scott Taylor
Sergey Biryukov
John Blackbourn
Drew Jaynes
Jeremy Felt
Boone Gorges
Mark Jaquith
Andrew Nacin