Commit Graph

112 Commits

Author SHA1 Message Date
John Blackbourn ca028cfc4c Users: Allow Super Admins to remove themselves from a site on a Multisite network.
Props Mista-Flo, birgire

Fixes #41439

Built from https://develop.svn.wordpress.org/trunk@45407


git-svn-id: http://core.svn.wordpress.org/trunk@45218 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-05-25 00:13:53 +00:00
Gary Pendergast 7a617078fa Coding Standards: Upgrade WPCS to 1.2.1.
This upgrade fixes quite a few false positives, as well as auto-fixing some indenting issues.

Fixes #45956.


Built from https://develop.svn.wordpress.org/trunk@44574


git-svn-id: http://core.svn.wordpress.org/trunk@44405 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-01-12 06:41:52 +00:00
Gary Pendergast 56c162fbc9 Coding Standards: Upgrade WPCS to 1.0.0
WPCS 1.0.0 includes a bunch of new auto-fixers, which drops the number of coding standards issues across WordPress significantly. Prior to running the auto-fixers, there were 15,312 issues detected. With this commit, we now drop to 4,769 issues.

This change includes three notable additions:
- Multiline function calls must now put each parameter on a new line.
- Auto-formatting files is now part of the `grunt precommit` script. 
- Auto-fixable coding standards issues will now cause Travis failures.

Fixes #44600.


Built from https://develop.svn.wordpress.org/trunk@43571


git-svn-id: http://core.svn.wordpress.org/trunk@43400 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2018-08-17 01:51:36 +00:00
John Blackbourn 1b5d6c6971 Docs: Document many more parameters and properties using typed array notation.
See #41756

Built from https://develop.svn.wordpress.org/trunk@42871


git-svn-id: http://core.svn.wordpress.org/trunk@42701 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2018-03-22 20:27:32 +00:00
Gary Pendergast aaf99e6913 Code is Poetry.
WordPress' code just... wasn't.
This is now dealt with.

Props jrf, pento, netweb, GaryJ, jdgrimes, westonruter, Greg Sherwood from PHPCS, and everyone who's ever contributed to WPCS and PHPCS.
Fixes #41057.


Built from https://develop.svn.wordpress.org/trunk@42343


git-svn-id: http://core.svn.wordpress.org/trunk@42172 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-11-30 23:11:00 +00:00
Sergey Biryukov ca6f54cfce Users: After [42256], remove unnecessary double quotes around `first_name` and `last_name` properties.
See #42713.
Built from https://develop.svn.wordpress.org/trunk@42257


git-svn-id: http://core.svn.wordpress.org/trunk@42086 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-11-29 15:28:53 +00:00
Dion Hulse 05d60f74ed Users: Display partial names in the user listing tables.
This allows showing a name when only the first or last name is provided.

Props shital-patel, antipole.
Fixes #42713.

Built from https://develop.svn.wordpress.org/trunk@42256


git-svn-id: http://core.svn.wordpress.org/trunk@42085 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-11-29 03:41:46 +00:00
John Blackbourn 50948669eb Users: Revert [41613], [41614], and [41623] as this feature needs some more work.
See #38741

Built from https://develop.svn.wordpress.org/trunk@41753


git-svn-id: http://core.svn.wordpress.org/trunk@41587 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-10-04 22:17:46 +00:00
Andrea Fercia 6a6795382a Accessibility: List Tables: use `aria-current` for the views current link.
The `aria-current` attribute is a simple, effective way to help assistive
technologies users orientate themselves within a list of items. Continues the 
introduction in core of the `aria-current` attribute after [41359] and [41371].

Props joedolson, flixos90, afercia.
Fixes #32399.

Built from https://develop.svn.wordpress.org/trunk@41683


git-svn-id: http://core.svn.wordpress.org/trunk@41517 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-10-02 19:44:47 +00:00
John Blackbourn 807bc5a6c9 Users: Introduce the concept of a large site in order to speed up the Users screen when there are many users.
Calling the `count_users()` function is expensive, regardless of the counting strategy that's used, and it gets
slower the more users there are on a site. In order to speed up the Users screen in the admin area, calling
`count_users()` can be avoided entirely while still displaying the total count for users.

This introduces some new functions:

* `wp_is_large_user_count()`
* `wp_get_active_user_count()`
* `wp_update_active_user_count()`

A corresponding `wp_is_large_user_count` filter is also introduced.

Props tharsheblows, johnbillion

Fixes #38741

Built from https://develop.svn.wordpress.org/trunk@41613


git-svn-id: http://core.svn.wordpress.org/trunk@41448 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-09-27 13:04:47 +00:00
Sergey Biryukov acb9773212 Users: After [41027], assign `$author_posts_url` outside of the condition to simplify the logic.
See #38085.
Built from https://develop.svn.wordpress.org/trunk@41180


git-svn-id: http://core.svn.wordpress.org/trunk@41020 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-07-28 14:21:45 +00:00
Drew Jaynes 1a28ec87e1 Docs: Remove `@access` notations from method DocBlocks in wp-admin/* classes.
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.

Built from https://develop.svn.wordpress.org/trunk@41161


git-svn-id: http://core.svn.wordpress.org/trunk@41001 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-07-27 00:40:43 +00:00
John Blackbourn 2dfea4210b Users: Show a `Super Admin` label next to Super Admins on all user listing screens when the current user can manage network users.
Fixes #41165

Built from https://develop.svn.wordpress.org/trunk@41150


git-svn-id: http://core.svn.wordpress.org/trunk@40990 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-07-25 17:43:42 +00:00
John Blackbourn b4c2f16d01 Users: Ensure that users with no role on a site are taken into consideration when listing users on Multisite.
This ensures that users who are a member of a site but have no role are correctly listed on the Users screen and can be filtered from the 'None' role filter.

Props tobi823, flixos90, scottlee

Fixes #36196

Built from https://develop.svn.wordpress.org/trunk@41138


git-svn-id: http://core.svn.wordpress.org/trunk@40978 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-07-25 00:24:43 +00:00
Sergey Biryukov 6724151d41 Users: Add a "View" link to users listed on the Users screen that points to the user's author archive.
Props ryanplas, johnjamesjacoby, viralsampat, Girishpanchal, xkon.
Fixes #38085.
Built from https://develop.svn.wordpress.org/trunk@41027


git-svn-id: http://core.svn.wordpress.org/trunk@40877 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-07-11 13:30:44 +00:00
Drew Jaynes 903d23be34 Users: Introduce the `manage_users_extra_tablenav` action, fired immediately outside the closing "actions" div in the Users list table tablenav.
A similar `manage_posts_extra_tablenav` hook fires in the same location and context in the Posts list table tablenav.

Props GunGeekATX, adamsilverstein.
Fixes #36990.

Built from https://develop.svn.wordpress.org/trunk@40974


git-svn-id: http://core.svn.wordpress.org/trunk@40824 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-07-01 03:02:41 +00:00
Sergey Biryukov 25e94961b4 Administration: In user list tables, display a dash instead of a blank space and add "Unknown" as a screen reader text when the user's first name and last name are blank.
Props Girishpanchal, yahil.
Fixes #40628.
Built from https://develop.svn.wordpress.org/trunk@40956


git-svn-id: http://core.svn.wordpress.org/trunk@40806 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-06-27 00:27:39 +00:00
Andrea Fercia 3aabc09e9c Administration: Fix some HTML validation errors.
Fixes some minor HTML issues in the admin and, most notably, changes the rel
attribute used in the List Tables from `rel="permalink"` to `rel="bookmark"`.

Props mihai2u, pento, arena, topher1kenobe, michalzuber, stubgo.
Fixes #37004.

Built from https://develop.svn.wordpress.org/trunk@40823


git-svn-id: http://core.svn.wordpress.org/trunk@40680 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-05-23 17:58:43 +00:00
Sergey Biryukov c07571de67 Docs: Change `@param` type for `$user_object` in `WP_Users_List_Table::single_row()` from `object` to `WP_User` to be more accurate.
Props sebastian.pisula.
Fixes #39536.
Built from https://develop.svn.wordpress.org/trunk@39757


git-svn-id: http://core.svn.wordpress.org/trunk@39695 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-01-10 12:45:44 +00:00
Andrea Fercia eeefec932f Administration: Improve the usage of the button CSS classes.
Introduces some consistency in the usage of the button CSS classes, fixes the
focus style for accessibility and responsiveness of the buttons.

- Adds the `button` class to all primary buttons make them responsive
- Removes all `secondary-button` classes and replaces it with button when needed. `button-secondary` shouldn't be used and exists just for backward compatibility reasons
- Replaces classes inside `submit_button()` with a shorthand for some buttons, and use an empty string for the default `button` class. Passing `button` is unnecessary
- Adjusts `get_submit_button()` to remove empty items

Props iseulde, dimchik, chris_d2d, mhowell, afercia.
Fixes #27314, #37138, #37448.

Built from https://develop.svn.wordpress.org/trunk@38672


git-svn-id: http://core.svn.wordpress.org/trunk@38615 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-28 19:54:28 +00:00
Drew Jaynes c3055cc190 Docs: Standardize hook docs in wp-admin/* to use third-person singular verbs per the inline documentation standards for PHP.
See #36913.

Built from https://develop.svn.wordpress.org/trunk@37488


git-svn-id: http://core.svn.wordpress.org/trunk@37456 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-05-22 18:01:30 +00:00
Dominik Schilling 251274abf6 List Tables: Pass the `$which` parameter to `restrict_manage_posts` and `restrict_manage_users`.
`$which` contains the location of the extra table nav markup: 'top' or 'bottom'.

Props martin.krcho.
Fixes #35307.
Built from https://develop.svn.wordpress.org/trunk@37422


git-svn-id: http://core.svn.wordpress.org/trunk@37388 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-05-12 15:13:27 +00:00
Rachel Baker 56c18bb5af Users: Remove the “Name” column of the Users table from appearing sortable.
The “Name” column of the Users WP List Table is not sortable because this column displays a concatenation of two optional values, `first_name` and `last_name`. Even if WP_User_Query supported ordering queries in this manner, the resulting sequence would be chaotic.

Fixes #28064.

Props jesin, and rachelbaker.
Built from https://develop.svn.wordpress.org/trunk@37314


git-svn-id: http://core.svn.wordpress.org/trunk@37280 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-04-26 20:35:29 +00:00
Drew Jaynes 8a386cb24f Docs: Add missing file headers to the list table classes and adjust class DocBlocks accordingly.
See #33701.

Built from https://develop.svn.wordpress.org/trunk@35241


git-svn-id: http://core.svn.wordpress.org/trunk@35207 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-17 15:13:25 +00:00
Sergey Biryukov 2c12662eff Remove obsolete code from `WP_Users_List_Table::get_sortable_columns().
Sorting by post count was disabled in [17024].

Props jdgrimes.
See #15861.
Built from https://develop.svn.wordpress.org/trunk@35110


git-svn-id: http://core.svn.wordpress.org/trunk@35075 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-13 02:25:25 +00:00
Scott Taylor 57c2ef2655 Users List Table: after [35011], just use `wp_roles()`, no global import. #winning
See #22959.

Built from https://develop.svn.wordpress.org/trunk@35012


git-svn-id: http://core.svn.wordpress.org/trunk@34977 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-10 15:36:26 +00:00
Scott Taylor ab2905da84 Users List Table: after [34963], remove unused code/add doc for global import.
See #22959.

Built from https://develop.svn.wordpress.org/trunk@35011


git-svn-id: http://core.svn.wordpress.org/trunk@34976 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-10 15:26:24 +00:00
John Blackbourn b62e798c17 Introduce the ability to filter the Users admin listing screen by users with no role, if such users exist.
Fixes #22993
Props spmlucas, johnbillion

Built from https://develop.svn.wordpress.org/trunk@34965


git-svn-id: http://core.svn.wordpress.org/trunk@34930 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 22:07:47 +00:00
John Blackbourn 1451ebc0d1 On the Users list table, show all the roles of a user in a comma-separated list if they have more than one role. This prevents role obfuscation in situations where a user has had more than one role programmatically assigned to them.
Fixes #22959
Props scribu, JustinSainton, DrewAPicture, johnbillion

Built from https://develop.svn.wordpress.org/trunk@34963


git-svn-id: http://core.svn.wordpress.org/trunk@34928 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 21:59:25 +00:00
Drew Jaynes b453c9e976 Users: Don't pass the current `WP_Users_List_Table` or `WP_MS_Users_List_Table` instance to the `users_list_table_query_args` filter after all.
After some discussion, it was decided that Multisite vs single site context can just as easily be derived using available functions like `is_network_admin()`, `get_current_screen()`, etc., rendering the second parameter moot. The hook was introduced in [34796].

Fixes #25360.

Built from https://develop.svn.wordpress.org/trunk@34813


git-svn-id: http://core.svn.wordpress.org/trunk@34778 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-03 21:49:24 +00:00
Drew Jaynes b38569a5fc Users: Introduce the `users_list_table_query_args` filter, for modifying the `WP_User_Query` arguments used within the `prepare_items()` methods in the users list tables.
The current list table is passed as a second parameter, `$this`, and can take the form of either a `WP_Users_List_Table` or `WP_MS_Users_List_Table` instance depending on the context in which the filter was evaluated.

Props juliobox for the initial patch.
Fixes #25360.

Built from https://develop.svn.wordpress.org/trunk@34796


git-svn-id: http://core.svn.wordpress.org/trunk@34761 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-03 07:24:25 +00:00
Scott Taylor 882c34d555 List Tables: only hide bulk actions when there are no items, don't hide all of the extra table nav.
Fixes #33824.

Built from https://develop.svn.wordpress.org/trunk@34707


git-svn-id: http://core.svn.wordpress.org/trunk@34671 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-09-30 00:47:27 +00:00
Scott Taylor f78170934a Users List Table: show the "Change role to" dropdown on the top and bottom. Currently only shows on top.
See #27743.

Built from https://develop.svn.wordpress.org/trunk@34636


git-svn-id: http://core.svn.wordpress.org/trunk@34600 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-09-27 19:11:26 +00:00
Scott Taylor f9c2a88a8a List Tables: when comparing string literals (non-numeric in nature) against vars, strict comparison can/should be used.
Props wonderboymusic, Viper007Bond.
Fixes #21249.

Built from https://develop.svn.wordpress.org/trunk@34383


git-svn-id: http://core.svn.wordpress.org/trunk@34347 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-09-22 06:06:25 +00:00
Nikolay Bachiyski 097c4fd2f4 List tables: escape user e-mails
Better safe than sorry.

Built from https://develop.svn.wordpress.org/trunk@34133


git-svn-id: http://core.svn.wordpress.org/trunk@34101 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-09-14 22:33:25 +00:00
Helen Hou-Sandí 1f500055a6 Drop the hyphen from e-mail and standardize on email.
The AP Stylebook changed this in 2011, and we're woefully inconsistent, so let's go with the standard.

props morganestes, voldemortensen, niallkennedy (for patching on the previous AP style).
fixes #26156.

Built from https://develop.svn.wordpress.org/trunk@33774


git-svn-id: http://core.svn.wordpress.org/trunk@33742 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-08-28 03:17:21 +00:00
Scott Taylor 93f745fd9b In `WP_Users_List_Table::single_row()`, `$actions` is not always set before being used.
See #33491.

Built from https://develop.svn.wordpress.org/trunk@33735


git-svn-id: http://core.svn.wordpress.org/trunk@33703 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-08-25 20:38:20 +00:00
Drew Jaynes 2d0721aab9 Fix the summary for the `WP_Users_List_Table->get_default_primary_column_name()` method added in 4.3.
See [32644]. See #32891.

Built from https://develop.svn.wordpress.org/trunk@33210


git-svn-id: http://core.svn.wordpress.org/trunk@33182 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-07-13 19:48:25 +00:00
Helen Hou-Sandí 8eb7f71e6b List tables: A better responsive view.
Instead of truncating columns, the data that's already in the markup can now be toggled into view. Only seems appropriate to celebrate four years of contributing by finally doing the first thing I ever mocked up.

Known issues / concerns:
* Custom list tables that don't define a primary column will show nothing at all. These are not extremely common, as `WP_List_Table` isn't really recommended for plugin consumption, but it happens. We need to come up with some kind of fallback.
* Some visual elements, particularly whitespace, could use refining.
* Needs a11y review.
* Touch performance on iOS feels sluggish - is there anything we can do about that?
* Would this be better accordion-style (only one expanded at a time)?
* Is `wp_strip_all_tags()` good enough for column titles that have HTML in them? It's essentially a workaround for the fact that core's comments column does that for the icon, which maybe it shouldn't. Perhaps worth another ticket, as a markup change would be fairly independent.
* Visual hierarchy is not great when expanded (also worthy of another ticket).
* Quick edit now becomes noticeably more annoying to cancel out of, as you have to scroll all the way down and you lose your position from before it was opened. Again, worthy of another ticket.

props Michael Arestad, helen.
see #32395.

Built from https://develop.svn.wordpress.org/trunk@33016


git-svn-id: http://core.svn.wordpress.org/trunk@32987 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-07-01 01:31:25 +00:00
Helen Hou-Sandí c87224eaf6 List tables: Use a class instead of inline styles for hidden columns.
fixes #32608.

Built from https://develop.svn.wordpress.org/trunk@32724


git-svn-id: http://core.svn.wordpress.org/trunk@32694 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-06-10 19:47:27 +00:00
Helen Hou-Sandí 005d937ce2 List tables:
* Avoid notices in custom list tables that manually set `$_column_headers`. Any plugins using this for a specific purpose should update.
* Restore a special class name in the users list table.

props georgestephanis, stephdau.
see #25408.

Built from https://develop.svn.wordpress.org/trunk@32717


git-svn-id: http://core.svn.wordpress.org/trunk@32687 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-06-10 01:46:27 +00:00
Konstantin Obenland c20edc4df5 Remove title attributes in user list tables.
They don't add valuable information and are redundant.
Reduces annoyance for screen reader users.

Props afercia.
Fixes #32535.


Built from https://develop.svn.wordpress.org/trunk@32694


git-svn-id: http://core.svn.wordpress.org/trunk@32664 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-06-05 08:40:26 +00:00
Drew Jaynes 0df0e0bf36 Fix syntax and add a missing return description for inline documentation introduced in [32644] for `WP_Users_List_Table`.
See #25408. See #32246.

Built from https://develop.svn.wordpress.org/trunk@32670


git-svn-id: http://core.svn.wordpress.org/trunk@32640 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-05-31 01:45:27 +00:00
Scott Taylor c6a4512b1b Add missing doc blocks to `wp-admin/includes/*`.
Fix some egregious uses of tabbing.
Some functions can simply return `apply_filters(...)` instead of setting a variable that is immediately returned.

See #32444.

Built from https://develop.svn.wordpress.org/trunk@32654


git-svn-id: http://core.svn.wordpress.org/trunk@32624 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-05-29 20:17:26 +00:00
Helen Hou-Sandí 4c0c7fd7ba List tables: introduce the concept of a "primary" column.
This becomes the column that contains the row actions, and allows for a more flexibility, particularly with custom post types and list tables. To (re)define the primary column, use the `list_table_primary_column` filter, which receives the column name and the screen ID as arguments.

props stephdau, DaveAl, jesin.
see #25408.

Built from https://develop.svn.wordpress.org/trunk@32644


git-svn-id: http://core.svn.wordpress.org/trunk@32614 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-05-29 02:41:25 +00:00
Scott Taylor b56b9b3e5c Add `@global` annotations for `wp-admin/*`.
See #32444.

Built from https://develop.svn.wordpress.org/trunk@32642


git-svn-id: http://core.svn.wordpress.org/trunk@32612 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-05-28 21:41:30 +00:00
Drew Jaynes 654ee78c93 Clarify 4.2.0 changelog entry, add global description to the DocBlock for `WP_Users_List_Table->single_row()`.
See #31888.

Built from https://develop.svn.wordpress.org/trunk@32015


git-svn-id: http://core.svn.wordpress.org/trunk@31994 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-04-04 21:09:27 +00:00
Dominik Schilling 50c2cee32d Merge three similar strings.
props pavelevap.
see #31013.
Built from https://develop.svn.wordpress.org/trunk@31717


git-svn-id: http://core.svn.wordpress.org/trunk@31698 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-03-11 15:25:28 +00:00
Jeremy Felt 7644e68119 Provide proper label associations and descriptions throughout the network admin
* 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.

Built from https://develop.svn.wordpress.org/trunk@31517


git-svn-id: http://core.svn.wordpress.org/trunk@31498 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-02-23 02:29:26 +00:00
Scott Taylor fe6b5983df In PHP 5.0.0, `is_a()` became deprecated in favour of the `instanceof` operator. Calling `is_a()` would result in an `E_STRICT` warning.
In PHP 5.3.0, `is_a()` is no longer deprecated, and will therefore no longer throw `E_STRICT` warnings.

To avoid warnings in PHP < 5.3.0, convert all `is_a()` calls to `$var instanceof WP_Class` calls.

`instanceof` does not throw any error if the variable being tested is not an object, it simply returns `false`.

Props markoheijnen, wonderboymusic.
Fixes #25672.

Built from https://develop.svn.wordpress.org/trunk@31188


git-svn-id: http://core.svn.wordpress.org/trunk@31169 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-01-16 01:06:24 +00:00