Similar to the existing `role`/`role__in`/`role__not_in` query arguments, this adds support for three new query arguments in `WP_User_Query`:
* `capability`
* `capability__in`
* `capability__not_in`
These can be used to fetch users with (or without) a specific set of capabilities, for example to get all users
with the capability to edit a certain post type.
Under the hood, this will check all existing roles on the site and perform a `LIKE` query against the `capabilities` user meta field to find:
* all users with a role that has this capability
* all users with the capability being assigned directly
Note: In WordPress, not all capabilities are stored in the database. Capabilities can also be modified using filters like `map_meta_cap`. These new query arguments do NOT work for such capabilities.
The prime use case for capability queries is to get all "authors", i.e. users with the capability to edit a certain post type.
Until now, `'who' => 'authors'` was used for this, which relies on user levels. However, user levels were deprecated a long time ago and thus never added to custom roles. This led to constant frustration due to users with custom roles missing from places like author dropdowns.
This updates any usage of `'who' => 'authors'` in core to use capability queries instead.
Subsequently, `'who' => 'authors'` queries are being **deprecated** in favor of these new query arguments.
Also adds a new `capabilities` parameter (mapping to `capability__in` in `WP_User_Query`) to the REST API users controller.
Also updates `twentyfourteen_list_authors()` in Twenty Fourteen to make use of this new functionality, adding a new `twentyfourteen_list_authors_query_args` filter to make it easier to override this behavior.
Props scribu, lgladdly, boonebgorges, spacedmonkey, peterwilsoncc, SergeyBiryukov, swissspidy.
Fixes#16841.
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This brings some consistency with the other similar actions:
* `pre_get_comments`
* `pre_get_networks`
* `pre_get_posts`
* `pre_get_sites`
* `pre_user_query`
Follow-up to [29363] and [37572].
Props andy, adamsilverstein, hellofromTonya, desrosj, SergeyBiryukov.
Fixes#50961.
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Using the canonical function name for PHP functions is strongly recommended, as aliases may be deprecated or removed without (much) warning.
This replaces all uses of the following:
* `join()` with `implode()`
* `sizeof()` with `count()`
* `is_writeable()` with `is_writable()`
* `doubleval()` with a `(float)` cast
In part, this is a follow-up to #47746.
Props jrf.
See #50767.
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Add a new filter `users_pre_query` - filters the users array before the query takes place. Return a non-null value to bypass WordPress's default user queries. Similar to the `posts_pre_query` filter for WP_Query added in #36687. This filter lets you short circuit the WP_User_Query MySQL query to return your own results.
Developers should note that filtering functions that require pagination information are encouraged to set the `total_users` property of the WP_User_Query object, passed to the filter by reference. If WP_User_Query does not perform a database query, it will not have enough information to generate these values itself.
Props tlovett1, birgire, boonebgorges, spacedmonkey.
Fixes#44169.
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Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs.
See #41452.
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The `$user_total` member of `WP_User_Query`, and corresponding `get_total()` method, have always been documented as returning an `int`. `$user_total`, however, is populated by `$wpdb->get_var()`, which returns
a string (containing an integer value). Casting the return value from `get_var()` as an `int` rectifies this discrepency.
Props runciters.
Fixes#39297.
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New parameters are: `login`, `login__in`, `login__not_in`, `nicename`,
`nicename__in`, `nicename__not_in`.
`login__in` and `nicename__in` are also now valid values for the
'orderby' parameter.
Props ryanplas.
Fixes#36624.
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Also use 'back-compat' in some inline comments where backward compatibility is the subject and shorthand feels more natural.
Note: 'backwards compatibility/compatibile' can also be considered correct, though it's primary seen in regular use in British English.
Props ocean90.
Fixes#36835.
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Multisite functions use the term "blog" to refer to what we now call a "site," e.g. `get_current_blog_id()`. These functions are here to stay because of our commitment to backwards compatibility. What we can do is set the documentation straight.
See #35417.
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It's back, and it's better than ever: an overhaul of role-related arguments
in `WP_User_Query`. This updated version of the previously-reverted [34875]
includes support for the use of `$blog_id` without specifying a `$role`, for
a 99.7% reduced chance of breaking wordpress.org and other large sites.
Props boonebgorges, swissspidy.
Fixes#22212.
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WordPress.org was taken down due to as Otto42 describes:
The previous version of this function added the query piece for the meta key = blog_id.capabilities, regardless of whether or not a role was requested. This limits the users returned to those with some defined role on this particular multisite instance.
See #22212
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* 'role' now accepts an array or comma-separated list of role names. When passing multiple values for 'role', `WP_User_Query` will only match users that have all of the specified roles.
* 'role__in' accepts an array of role names, and allow the filtering of matched users to those with at least one of the specified roles.
* 'role__not_in' accepts an array of role names, and allows the filtering of matched users to those who have none of the specified roles.
Props swissspidy, mordauk, barrykooij, sirbrillig.
Fixes#22212.
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