Commit Graph

51 Commits

Author SHA1 Message Date
Sergey Biryukov 30d9432760 Code Modernization: Use explicit visibility for class property declarations.
Using `var` or only `static` to declare a class property is PHP 4 code.

This updates the codebase to use explicit visibility modifiers introduced in PHP 5.

Props jrf.
Fixes #51557. See #22234.
Built from https://develop.svn.wordpress.org/trunk@49184


git-svn-id: http://core.svn.wordpress.org/trunk@48946 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-17 16:26:09 +00:00
Sergey Biryukov e36a4a7db9 Rewrite Rules: Add missing newline to the `HTTP_AUTHORIZATION` rewrite rule.
Follow-up to [49109].

Props nendeb55, georgestephanis, johnbillion.
Fixes #51495. See #42790.
Built from https://develop.svn.wordpress.org/trunk@49131


git-svn-id: http://core.svn.wordpress.org/trunk@48893 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-12 19:10:07 +00:00
TimothyBlynJacobs d5ebe12f11 REST API: Introduce Application Passwords for API authentication.
In WordPress 4.4 the REST API was first introduced. A few releases later in WordPress 4.7, the Content API endpoints were added, paving the way for Gutenberg and countless in-site experiences. In the intervening years, numerous plugins have built on top of the REST API. Many developers shared a common frustration, the lack of external authentication to the REST API.

This commit introduces Application Passwords to allow users to connect to external applications to their WordPress website. Users can generate individual passwords for each application, allowing for easy revocation and activity monitoring. An authorization flow is introduced to make the connection flow simple for users and application developers.

Application Passwords uses Basic Authentication, and by default is only available over an SSL connection.

Props georgestephanis, kasparsd, timothyblynjacobs, afercia, akkspro, andraganescu, arippberger, aristath, austyfrosty, ayesh, batmoo, bradyvercher, brianhenryie, helen, ipstenu, jeffmatson, jeffpaul, joostdevalk, joshlevinson, kadamwhite, kjbenk, koke, michael-arestad, Otto42, pekz0r, salzano, spacedmonkey, valendesigns.
Fixes #42790.

Built from https://develop.svn.wordpress.org/trunk@49109


git-svn-id: http://core.svn.wordpress.org/trunk@48871 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-08 22:14:06 +00:00
John Blackbourn 7f898dd9c4 Docs: Use more appropriate variable names in the inline docs for action and filter parameters.
See #49572
Built from https://develop.svn.wordpress.org/trunk@48585


git-svn-id: http://core.svn.wordpress.org/trunk@48347 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-23 19:06:03 +00:00
Sergey Biryukov 58ad216087 Docs: Improve documentation for optional parameters per the documentation standards.
See #49572.
Built from https://develop.svn.wordpress.org/trunk@48197


git-svn-id: http://core.svn.wordpress.org/trunk@47966 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-06-28 11:49:02 +00:00
Sergey Biryukov b16368c268 Docs: Remove `@staticvar` tags from core.
The tag was supported in phpDocumentor 1.x, but is no longer supported in 2.x and 3.x.

Usage of static variables is considered an internal implementation detail and has no information value for someone reading the docs.

Props alishanvr, jrf.
Fixes #50426.
Built from https://develop.svn.wordpress.org/trunk@48109


git-svn-id: http://core.svn.wordpress.org/trunk@47878 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-06-20 12:40:12 +00:00
Sergey Biryukov 7932193708 Coding Standards: Use strict comparison where static strings are involved.
This reduces the number of `WordPress.PHP.StrictComparisons.LooseComparison` issues in half, from 1897 to 890.

Includes minor code layout fixes for better readability.

See #49542.
Built from https://develop.svn.wordpress.org/trunk@47808


git-svn-id: http://core.svn.wordpress.org/trunk@47584 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-05-16 18:42:12 +00:00
Sergey Biryukov 38676936ba Coding Standards: Use strict type check for `in_array()` and `array_search()` where strings are involved.
This reduces the number of `WordPress.PHP.StrictInArray.MissingTrueStrict` issues from 486 to 50.

Includes minor code layout fixes for better readability.

See #49542.
Built from https://develop.svn.wordpress.org/trunk@47550


git-svn-id: http://core.svn.wordpress.org/trunk@47325 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-04-05 03:02:11 +00:00
Sergey Biryukov 641c632b0c Coding Standards: Use Yoda conditions where appropriate.
See #49222.
Built from https://develop.svn.wordpress.org/trunk@47219


git-svn-id: http://core.svn.wordpress.org/trunk@47019 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-02-09 16:55:09 +00:00
Sergey Biryukov 001ffe81fb Docs: Improve inline comments per the documentation standards.
Includes minor code layout fixes for better readability.

See #48303.
Built from https://develop.svn.wordpress.org/trunk@47122


git-svn-id: http://core.svn.wordpress.org/trunk@46922 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-01-29 00:45:18 +00:00
Sergey Biryukov dd4d98a368 Docs: In various `@return` tags, list the expected type first, instead of `false`.
Follow-up to [46696].

See #48303.
Built from https://develop.svn.wordpress.org/trunk@47060


git-svn-id: http://core.svn.wordpress.org/trunk@46860 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-01-11 18:32:05 +00:00
Sergey Biryukov d858656023 Bootstrap/Load: Make handling the `/favicon.ico` requests more flexible.
Previously, `wp_favicon_request()` was introduced in [13205] to avoid a performance hit of serving a full 404 page on every favicon request.

While working as intended, that implementation did not provide a way for theme or plugin authors to manage the behavior of favicon requests.

This changeset implements the following logic (only applied if WordPress is installed in the root directory):

* If there is a Site Icon set in Customizer, redirect `/favicon.ico` requests to that icon.
* Otherwise, use the WordPress logo as a default icon.
* If a physical `/favicon.ico` file exists, do nothing, let the server handle the request.

Handling `/favicon.ico` is now more consistent with handling `/robots.txt` requests.

New functions and hooks:

* Introduce `is_favicon()` conditional tag to complement `is_robots()`.
* Introduce `do_favicon` action to complement `do_robots` and use it in template loader.
* Introduce `do_favicon()` function, hooked to the above action by default, to complement `do_robots()`.
* Introduce `do_faviconico` action to complement `do_robotstxt`, for plugins to override the default behavior.
* Mark `wp_favicon_request()` as deprecated in favor of `do_favicon()`.

Props jonoaldersonwp, birgire, joostdevalk, mukesh27, SergeyBiryukov.
Fixes #47398.
Built from https://develop.svn.wordpress.org/trunk@47018


git-svn-id: http://core.svn.wordpress.org/trunk@46818 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-12-28 21:20:04 +00:00
Sergey Biryukov 1f816ad18d Docs: Use the `{@see ...}` tag for the replacement in `@deprecated` tags, so that Developer Reference could automatically link to the replacement.
Props jrf.
See #48255.
Built from https://develop.svn.wordpress.org/trunk@46685


git-svn-id: http://core.svn.wordpress.org/trunk@46485 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-11-09 13:05:02 +00:00
Sergey Biryukov f60094679f Coding Standards: Consistently use `do_action_deprecated()` and `apply_filters_deprecated()` for deprecated hooks.
Props jrf.
See #48255.
Built from https://develop.svn.wordpress.org/trunk@46684


git-svn-id: http://core.svn.wordpress.org/trunk@46484 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-11-09 12:59:03 +00:00
John Blackbourn 9ac1d82f23 Docs: Further improve documentation of known return types, plus other docs fixes.
See #48303

Built from https://develop.svn.wordpress.org/trunk@46661


git-svn-id: http://core.svn.wordpress.org/trunk@46461 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-11-05 21:27:02 +00:00
John Blackbourn 3caaa40fc6 Docs: Switch more docs over to typed array notation, plus some fixes.
See #48303, #41756

Built from https://develop.svn.wordpress.org/trunk@46596


git-svn-id: http://core.svn.wordpress.org/trunk@46393 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-10-26 21:09:04 +00:00
Sergey Biryukov c32fb1dbee Code Modernisation: Remove redundant call to `func_get_arg()` in `wp-includes/class-wp-rewrite.php`.
Props jrf.
See #47678.
Built from https://develop.svn.wordpress.org/trunk@46141


git-svn-id: http://core.svn.wordpress.org/trunk@45953 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-09-15 11:47:54 +00:00
Sergey Biryukov ea606165a5 Docs: Add missing description for `$wp` global.
See #45604, #47110.
Built from https://develop.svn.wordpress.org/trunk@45736


git-svn-id: http://core.svn.wordpress.org/trunk@45547 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-08-04 01:28:55 +00:00
Gary Pendergast 4803fc405e Coding Standards: Fix the `Squiz.PHP.DisallowMultipleAssignments` violations in `wp-includes`.
See #47632.


Built from https://develop.svn.wordpress.org/trunk@45590


git-svn-id: http://core.svn.wordpress.org/trunk@45401 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-07-02 23:42:58 +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
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
Gary Pendergast c90cfa3b50 General: Fix some precision alignment formatting warnings.
The WPCS `WordPress.WhiteSpace.PrecisionAlignment` rule throws warnings for a bunch of code that will likely cause issues for `wpcbf`. Fixing these manually beforehand gives us better auto-fixed results later.

See #41057.


Built from https://develop.svn.wordpress.org/trunk@42228


git-svn-id: http://core.svn.wordpress.org/trunk@42057 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-11-26 23:57:55 +00:00
John Blackbourn 4a16295dc5 Docs: Standardise the format used for documenting parameters passed by reference.
See #35974, #41017

Built from https://develop.svn.wordpress.org/trunk@41688


git-svn-id: http://core.svn.wordpress.org/trunk@41522 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-10-02 22:14:46 +00:00
Drew Jaynes 0860bb2771 Docs: Remove `@access` notations from method DocBlocks in wp-includes/* 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@41162


git-svn-id: http://core.svn.wordpress.org/trunk@41002 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-07-27 00:41:44 +00:00
Aaron Jorbin a8802232ec Make sure rewrite rules are not written until `wp_loaded` has fired
If a plugin attempts to change the rewrite rules to early, other plugins may have their rules inadvertently discarded. Additionally, some function such as `url_to_post_id` cause a rewrite rule lookup that could cause this accidental flushing. This forces the flushing to only occur once `wp_loaded` has been fired.

Fixes #37892.
Props Chouby.


Built from https://develop.svn.wordpress.org/trunk@38751


git-svn-id: http://core.svn.wordpress.org/trunk@38694 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-07 19:44:28 +00:00
Drew Jaynes 22adda2aa0 Hooks: Standardize naming of dynamic hooks to use interpolation vs concatenation.
Benefits gained in discoverability and self-documentation throughout core trump the negligible performance hit in using interpolation in hook names.

Props ramiy.
See #37748.

Built from https://develop.svn.wordpress.org/trunk@38307


git-svn-id: http://core.svn.wordpress.org/trunk@38248 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-08-22 18:25:31 +00:00
Drew Jaynes fb6d8bae49 Docs: Apply inline `@see` tags to hooks referenced in DocBlocks for core classes.
Applying these specially-crafted `@see` tags allows the Code Reference parser to recognize and link these elements as actions and filters.

See #36921.

Built from https://develop.svn.wordpress.org/trunk@37539


git-svn-id: http://core.svn.wordpress.org/trunk@37507 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-05-23 18:54:27 +00:00
Drew Jaynes 602b51a209 Docs: Standardize filter docs in core classes in wp-includes/* to use third-person singular verbs per the inline documentation standards for PHP.
See #36913.

Built from https://develop.svn.wordpress.org/trunk@37492


git-svn-id: http://core.svn.wordpress.org/trunk@37460 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-05-22 18:15:28 +00:00
Drew Jaynes b1804afeaf Docs: Standardize on 'backward compatibility/compatible' nomenclature in core inline docs.
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.

Built from https://develop.svn.wordpress.org/trunk@37431


git-svn-id: http://core.svn.wordpress.org/trunk@37397 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-05-13 18:41:31 +00:00
John Blackbourn 53851c612c Rewrite Rules: Allow rewrite rules to work in nested WordPress installations on IIS.
Props WiZZarD_
Fixes #35558

Built from https://develop.svn.wordpress.org/trunk@36953


git-svn-id: http://core.svn.wordpress.org/trunk@36921 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-03-10 20:01:28 +00:00
Pascal Birchler b0b13aff2f Embeds: Allow embedding static front pages and pages having a child page with an `embed` slug.
This makes `embed` a special slug that can't be used for new pages/posts. When `https://example.com/foo/embed/` is an existing page, embeds fall back to `https://example.com/foo/?embed=true`.
Adds unit tests.

Fixes #34971.
Built from https://develop.svn.wordpress.org/trunk@36307


git-svn-id: http://core.svn.wordpress.org/trunk@36274 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-01-15 07:56:26 +00:00
Pascal Birchler d63ae29fac After [36254], commit all the necessary files and not just the unit test.
Built from https://develop.svn.wordpress.org/trunk@36255


git-svn-id: http://core.svn.wordpress.org/trunk@36222 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-01-10 19:07:26 +00:00
Pascal Birchler f079f57357 Rewrite: Add a `remove_rewrite_tag()` helper function.
It can be used to properly remove registered rewrite tags. Adds unit tests.

Fixes #35236.
Built from https://develop.svn.wordpress.org/trunk@36217


git-svn-id: http://core.svn.wordpress.org/trunk@36184 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-01-07 09:39:27 +00:00
Pascal Birchler dbe28bf8e3 Rewrite: Add a `remove_permastruct()` helper function.
It can be used to remove permastructs that were added using `add_permastruct()`.

Fixes #35235.
Built from https://develop.svn.wordpress.org/trunk@36181


git-svn-id: http://core.svn.wordpress.org/trunk@36148 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-01-06 07:40:26 +00:00
Drew Jaynes 10367a4692 Docs: Add missing parameter and return descriptions to the DocBlock for `WP_Rewrite::iis7_url_rewrite_rules()`.
See #32246.

Built from https://develop.svn.wordpress.org/trunk@35941


git-svn-id: http://core.svn.wordpress.org/trunk@35905 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-12-14 23:58:27 +00:00
Drew Jaynes cc4c59a1fa Docs: Add a couple of strategically-placed spaces in `WP_Rewrite`.
Fixes #34218.

Built from https://develop.svn.wordpress.org/trunk@34964


git-svn-id: http://core.svn.wordpress.org/trunk@34929 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 22:07:24 +00:00
Drew Jaynes aab0da2e17 Docs: Mark the optional parameters for `WP_Rewrite::generate_rewrite_rules()` as such, and improve overall formatting.
Also brings in the list of acceptable constants for the `$ep_mask` parameter.

See #34218.

Built from https://develop.svn.wordpress.org/trunk@34962


git-svn-id: http://core.svn.wordpress.org/trunk@34927 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 21:49:26 +00:00
Drew Jaynes e147ba60b0 Docs: Convert the description for the optional `$args` parameter in `WP_Rewrite::add_permastruct()` into a hash notation.
See #34218.

Built from https://develop.svn.wordpress.org/trunk@34960


git-svn-id: http://core.svn.wordpress.org/trunk@34925 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 21:35:26 +00:00
Drew Jaynes 9f4d5731e9 Docs: Improve more formatting and syntax for inline comments in `WP_Rewrite`.
See #34218.

Built from https://develop.svn.wordpress.org/trunk@34958


git-svn-id: http://core.svn.wordpress.org/trunk@34923 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 21:24:24 +00:00
Drew Jaynes 17010f97c7 Docs: Add saner formatting and make readability improvements to a variety of inline comments in `WP_Rewrite` and `WP_Rewrite::generate_rewrite_rules()`.
See #34218.

Built from https://develop.svn.wordpress.org/trunk@34957


git-svn-id: http://core.svn.wordpress.org/trunk@34922 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 21:18:25 +00:00
Sergey Biryukov 0b13fdf2fc Docs: Fix typo in [34944].
See #34218.
Built from https://develop.svn.wordpress.org/trunk@34955


git-svn-id: http://core.svn.wordpress.org/trunk@34920 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 21:00:26 +00:00
John Blackbourn db4f4c5538 Improve the parameter names and inline documentation for `add_rewrite_rule()`, `WP_Rewrite::add_rule()`, and `WP_Rewrite::add_external_rule()`.
Fixes #34197

Built from https://develop.svn.wordpress.org/trunk@34946


git-svn-id: http://core.svn.wordpress.org/trunk@34911 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 17:28:25 +00:00
Drew Jaynes 305ae14461 Docs: Fix third-person singular verbs in DocBlock summaries throughout `WP_Rewrite`.
See #34218.

Built from https://develop.svn.wordpress.org/trunk@34944


git-svn-id: http://core.svn.wordpress.org/trunk@34909 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 17:12:24 +00:00
Drew Jaynes d2dee54669 Docs: Relocate some more DocBlock-level `@see` tags and add some missing `@access` tags in `WP_Rewrite`.
See #34218.

Built from https://develop.svn.wordpress.org/trunk@34941


git-svn-id: http://core.svn.wordpress.org/trunk@34906 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 16:51:24 +00:00
Drew Jaynes 1e6f1c9a9b Docs: Relocate some DocBlock-level `@see` tags in `WP_Rewrite`.
See #34218.

Built from https://develop.svn.wordpress.org/trunk@34940


git-svn-id: http://core.svn.wordpress.org/trunk@34905 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 16:49:24 +00:00
Drew Jaynes 02645d5711 Docs: Remove invalid inline `@link` tags from a variety of DocBlocks in `WP_Rewrite`.
See #34218.

Built from https://develop.svn.wordpress.org/trunk@34939


git-svn-id: http://core.svn.wordpress.org/trunk@34904 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 16:47:25 +00:00
Drew Jaynes d1fd329ea2 Docs: Add a file header to wp-includes/class-wp-rewrite.php.
See #34218.

Built from https://develop.svn.wordpress.org/trunk@34938


git-svn-id: http://core.svn.wordpress.org/trunk@34903 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-08 16:41:26 +00:00
Gary Pendergast 83c3e3e00e Embeds: Add oEmbed provider support.
For the past 6 years, WordPress has operated as an oEmbed consumer, allowing users to easily embed content from other sites. By adding oEmbed provider support, this allows any oEmbed consumer to embed posts from WordPress sites.

In addition to creating an oEmbed provider, WordPress' oEmbed consumer code has been enhanced to work with any site that provides oEmbed data (as long as it matches some strict security rules), and provides a preview from within the post editor.

For security, embeds appear within a sandboxed iframe - the iframe content is a template that can be styled or replaced entirely by the theme on the provider site.

Props swissspidy, pento, melchoyce, netweb, pfefferle, johnbillion, extendwings, davidbinda, danielbachhuber, SergeyBiryukov, afercia

Fixes #32522.


Built from https://develop.svn.wordpress.org/trunk@34903


git-svn-id: http://core.svn.wordpress.org/trunk@34868 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-07 10:36:25 +00:00
Scott Taylor 619063b4e2 Rewrite: allow `add_rewrite_rule|WP_Rewrite::add_rule()` to accept an associative array for the value of `$redirect` instead of requiring a query string.
Adds unit tests.

Props scribu, DrewAPicture.
Fixes #16840.

Built from https://develop.svn.wordpress.org/trunk@34708


git-svn-id: http://core.svn.wordpress.org/trunk@34672 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-09-30 01:11:25 +00:00
Scott Taylor 175d476b0e Canonical/Rewrite: sanity check posts that are paged with `<!--nextpage-->`. Page numbers past the max number of pages are returning the last page of content and causing infinite duplicate content.
Awesome rewrite bug: the `page` query var was being set to `'/4'` in `$wp`. When cast to `int`, it returns `0` (Bless you, PHP). `WP_Query` calls `trim( $page, '/' )` when setting its own query var. The few places that were checking `page`	before posts were queried now have sanity checks, so that these changes work without flushing rewrites.	

Adds/updates unit tests.

Props wonderboymusic, dd32.
See #11694.

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