Prior to this change, a mix of `is_super_admin()` calls and `manage_network` capability checks was used to determine whether the current user could upgrade the network. With this changeset a dedicated capability is introduced that allows more granular handling.
Props dhanendran for the original patch.
Fixes#39205. See #37616.
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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( $locale )` is called. With `restore_previous_locale()` you can restore the previous locale. `restore_current_locale()` empties the stack and sets the locale back to the initial value.
`switch_to_locale()` is added to most of core's email functions, either with the value of `get_locale()` (site language) or `get_user_locale()` (user language with fallback to site language).
Props yoavf, tfrommen, swissspidy, pbearne, ocean90.
See #29783.
Fixes#26511.
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`get_network()` falls back to the current network when called without any arguments. Between this and `get_current_network_id()`, we can replace almost all instances of the global `$current_site` and all instances of `get_current_site()`.
This effectively deprecates `get_current_site()`, something that we'll do in a future ticket.
Props flixos90.
Fixes#37414.
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Introduce the `network_edit_site_nav` function, which DRYs up the code used to display a common set of links at the top of "Edit Site" views.
Introduce the `network_edit_site_nav_links` filter, which allows plugins to modify the list of links displayed at the top of Edit Site views as a "tabbed" interface.
Props johnjamesjacoby, c3mdigital, Bueltge.
Fixes#15800.
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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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Moving these functions to `wp-includes/capabilities.php` allows plugins to access more than just `is_super_admin()` and `get_super_admin()` from the front end without including a file via `wp-admin/`. Add an `is_multisite()` check to prevent use of these on single site environments now that they have left `ms.php`..
Props johnjamesjacoby.
Fixes#21788.
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To prevent inconsistent data across sites in a network the new email address is now stored in usermeta. Adds visual feedback for the case when an update has failed.
All existing options will be removed on a database upgrade.
Props MikeHansenMe, kovshenin, jeremyfelt, ocean90.
Fixes#23358.
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Multisite functions use the term "blog" to refer to what we now call a "site," e.g. `get_current_blog_id()`. These functions are here to stay because of our commitment to backwards compatibility. What we can do is set the documentation straight.
See #35417.
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The `_network_option()` parameter order will be changing to accept `$network_id` first. The `_site_option()` functions will remain in use throughout core as our way of retrieving a network option for the current network.
See #28290.
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`wp_delete_user()` and `wpmu_delete_user()` both require an `$id` parameter.
Previously, the functions did not verify that the value passed was, in fact,
a number. As such, passing an object or any other entity that would be cast
to int `1` would result in user 1 being deleted. We fix this by enforcing
the requirement that `$id` be numeric.
Props dipesh.kakadiya, utkarshpatel, juliobox.
Fixes#33800.
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`admin-filters.php`
`ms-admin-filters.php`
There are random actions and filters littered among files like `misc.php`. These files contain functions that won't work outside of admin context and are typically only loaded in files that have already loaded the admin bootstrap.
See #32529.
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* Add labels previously missing for many inputs throughout the network admin screen.
* Add proper `aria-describedby` attributes to provide better descriptions.
* Wrap grouped inputs with `fieldset` elements.
* Remove now unneeded `title` attributes when appropriate.
Props cfoellmann, afercia, rianrietveld.
Fixes#38406.
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