This is part of a larger project in cleaning up core's admin CSS. This collapses all colors used in the CSS to one of 12 blues, greens, reds, and yellows, 13 grays, pure black, and pure white. The colors are perceptually uniform from light to dark, half of each range has a 4.5 or higher contrast against white, the other half has a 4.5 or higher contrast against black.
Standardizing on this set of colors will help contributors make consistent, accessible design decisions. The full color palette can be seen here: https://codepen.io/ryelle/full/WNGVEjw
Props notlaura, danfarrow, kburgoine, drw158, audrasjb, Joen, hedgefield, ibdz, melchoyce.
See #49999.
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This changeset introduces a filter-based Robots API, providing central control over the `robots` meta tag.
* Introduces `wp_robots()` function which should be called anywhere a `robots` meta tag should be included.
* Introduces `wp_robots` filter which allows adding or modifying directives for the `robots` meta tag. The `wp_robots()` function is entirely filter-based, i.e. if no filter is added to `wp_robots`, no directives will be present, and therefore the entire `robots` meta tag will be omitted.
* Introduces the following `wp_robots` filter functions which replace similar existing functions that were manually rendering a `robots` meta tag:
* `wp_robots_noindex()` replaces `noindex()`, which has been deprecated.
* `wp_robots_no_robots()` replaces `wp_no_robots()`, which has been deprecated.
* `wp_robots_sensitive_page()` replaces `wp_sensitive_page_meta()`, which has been deprecated. Its rendering of the `referrer` meta tag has been moved to another new function `wp_strict_cross_origin_referrer()`.
Migration to the new functions is straightforward. For example, a call to `add_action( 'wp_head', 'wp_no_robots' )` should be replaced with `add_filter( 'wp_robots', 'wp_robots_no_robots' )`.
Plugins and themes that render their own `robots` meta tags are encouraged to switch to rely on the `wp_robots` filter in order to use the central management layer now provided by WordPress core.
Props adamsilverstein, flixos90, timothyblynjacobs, westonruter.
See #51511.
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Per accessibility best practices, it is recommended that all HTML `<img>` elements have an `alt` attribute. Any decorative images should have an empty `alt` attribute (`alt=""`).
Props laxman-prajapati, sabernhardt, audrasjb.
Fixes#51846.
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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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Technically, the `$format` argument should always be a string, but passing `false` used to work before [47808], so this restores backward compatibility.
The list of affected functions:
* `get_the_date()`
* `get_the_time()`
* `get_comment_date()`
* `get_comment_time()`
Props wittich, Rarst, akabarikalpesh, SergeyBiryukov.
Fixes#51184.
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To accommodate for the change, the `custom-logo` theme feature now accepts the `unlink-homepage-logo` parameter.
If and when the logo is linked on the home page, the link has the `aria-current` attribute for better accessibility.
Follow-up to [48039], [48283].
Props sabernhardt, audrasjb, johnstonphilip, demetris.
Fixes#37011.
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In `get_the_archive_title()` split the internal `$title` variable into `$title` and `$prefix`. By using the new `get_the_archive_title_prefix` filter the prefix can now wrapped with custom elements or removed completely by using
{{{
add_filter( 'get_the_archive_title_prefix', '__return_empty_string' );
}}}
Also, wrap the title part with a `span` element and pass the original title and prefix to the existing `get_the_archive_title` filter, allowing further customization to the archive titles.
Props Kaira, milindmore22, shireling, grapplerulrich, audrasjb, desrosj, Confridin, ramiy, ocean90.
Fixes#31237.
Fixes#38545.
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After [48039] it became clear that the non-linked custom logo on the home page needs an empty alt attribute, as in most of the cases the logo is decorative and doesn't need its purpose to be described.
This change outputs an empty alt attribute by default for the custom logo on the home page. If necessary, it is possible to use the new 'get_custom_logo_image_attributes' filter to manipulate the default attributes for the logo image and set an alt attribute.
Props FlorianBrinkmann, Soean, sabernhardt, audrasjb, SergeyBiryukov, samful, knutsp.
See #36640.
Fixes#37011.
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This PR adds a new color scheme option, which uses a high luminosity blue spot color, almost-black menu, and pure white for menu items.
This helps increase contrast, and bring more consistency with some of the higher contrast colors used in the block editor.
Props joen, ibdz, shaunandrews.
Fixes#50504.
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* `get_header()`
* `get_footer()`
* `get_sidebar()`
* `get_template_part()`
These functions now return false if the template file could not be found, to allow for easier debugging.
Props tferry, sphakka, johnbillion, pento, davidbinda, desrosj, birgire, garrett-eclipse, williampatton, davidbaumwald, SergeyBiryukov.
Fixes#40969.
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* `.wp-calendar-table` for the `<table>` element.
* `.wp-calendar-nav` for the navigation wrapper.
* `.wp-calendar-nav-prev` for the previous month link.
* `.wp-calendar-nav-next` for the next month link.
Replace `#prev` and `#next` HTML IDs with `.wp-calendar-nav-prev` and `.wp-calendar-nav-next` classes.
Props sabernhardt, BackuPs, audrasjb, jorbin.
Fixes#39763.
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Being a good idea in theory, in practice it does not always work reliably, may not recognize newer CSS properties, and sometimes displays phantom errors with no particular error message.
A plugin can re-enable CSS linting via the `wp_code_editor_settings` filter.
Props skypressatx, ThemeZee, johnbillion, ianbelanger, ZanderZ, starvoters1, raoulunger, prashantvatsh, SergeyBiryukov.
Fixes#44471.
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The <tfoot> element was allowed to precede the <tbody> element in HTML 5. However, that was changed in HTML 5.1 and <tfoot> must now follow <tbody>.
This removes the tfooot and instead uses a nav element for navigation between months.
Fixes: #39763
Props: isabel_brison, Harry Milatz, audrasjb, abhijitrakas, SergeyBiryukov
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For accessibility, the visual appearance and source order should match. Moving the toolbar to load in the new hook `wp_body_open` (5.2) fixes a long-standing source order problem.
Props jankimoradiya, afercia, SergeyBiryukov, audrasjb, ocean90, xkon, dinhtungdu.
Fixes#47053.
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This avoids the performance overhead of the function call every time `dirname( __FILE__ )` was used instead of `__DIR__`.
This commit also includes:
* Removing unnecessary parentheses from `include`/`require` statements. These are language constructs, not function calls.
* Replacing `include` statements for several files with `require_once`, for consistency:
* `wp-admin/admin-header.php`
* `wp-admin/admin-footer.php`
* `wp-includes/version.php`
Props ayeshrajans, desrosj, valentinbora, jrf, joostdevalk, netweb.
Fixes#48082.
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This change introduces a new Composer script, `compat` that will scan the codebase for (detectable) potential PHP compatibility issues using the `PHP_CodeSniffer` and a custom ruleset based off of the `PHPCompayibilityWP` ruleset (`phpcompat.xml.dist`).
The command will be run as a separate job within each Travis build. While many compatibility issues and false positives have already been corrected in this commit and other Trac tickets, there are still some remaining. For that reason, the job is allowed to fail while the remainder of the potential compatibility issues are investigated and addressed. After those are resolved, the job should be set as required to pass to help prevent new compatibility issues from being introduced.
Props desrosj, jrf, all PHPCompatibilityWP and PHPCompatibility contributors.
Fixes#46152.
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The `aria-current` attribute is a simple, effective, way to help assistive technology users orientate themselves within a list of items.
Continues the introduction in core of the `aria-current` attribute after [41359] and following changes.
Props audrasjb, melchoyce.
Fixes#47094.
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Introduce `get_post_timestamp()` to retrieve post published or modified time as a Unix timestamp.
Use `get_post_datetime()` in `get_post_time()` and `get_post_modified_time()` to return correct GMT time if default timezone is changed from UTC.
Props Rarst, johnregan3.
Fixes#25002.
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Hook documentation should be on the line directly above the line containing the `do_action()` or `apply_filters()` call. The CS auto-fixing, which changed some inconsistent function calls to multi-line function calls, is part of the reason why this was no longer the case for a select group of duplicate hook references.
Includes minor code layout fixes.
See #47110.
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This changes the "discourage search engines" option to output a `noindex, nofollow` robots meta tag. `Disallow: /` is removed from the `robots.txt` to allow search engines to discover they are requested not to index the site.
Disallowing search engines from accessing a site in the `robots.txt` file can result in search engines listing a site with a fragment (a listing without content).
Props donmhico, jonoaldersonwp.
Fixes#43590.
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* Add missing translator comments.
* Fix placement of some translator comments. Translator comments should be on the line directly above the line containing the translation function call for optimal compatibility with various `.pot` file generation tools. The CS auto-fixing, which changed some inconsistent function calls to multi-line function calls, is part of the reason why this was no longer the case for a select group of translator comments.
Includes minor code layout fixes.
Polyglots, rejoice! All WordPress core files now have translator comments for all strings with placeholders!
Props jrf, subrataemfluence, GaryJ, webdados, Dency, swissspidy, alvarogois, marcomartins, mihaiiceyro, vladwtz, niq1982, flipkeijzer, michielatyoast, chandrapatel, thrijith, joshuanoyce, FesoVik, tessak22, bhaktirajdev, cleancoded, dhavalkasvala, garrett-eclipse, bibliofille, socalchristina, priyankkpatel, 5hel2l2y, adamsilverstein, JeffPaul, pierlo, SergeyBiryukov.
Fixes#44360.
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Use of `date()` in core depends on PHP timezone set to UTC and not changed by third party code (which cannot be guaranteed).
`gmdate()` is functionally equivalent, but is not affected by PHP timezone setting: it's always UTC, which is the exact behavior the core needs.
Props nielsdeblaauw, Rarst.
Fixes#46438. See #44491.
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This action allows debugging mechanisms to perform greater introspection into which template parts are loaded for any given request. It also exposes the array of candidate template part file names for each template part instance.
Props pcfreak30, jdeeburke
Fixes#41575
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* Enables inserting (asynchronous) JavaScript right after the opening `body` tag.
* Add a `wp_body_open` helper function that triggers the `wp_body_open` action.
* Call `wp_body_open` in core themes immediately after the opening `body` tag.
Props joostdevalk, valendesigns, nacin, saracup, jorbin, mikeschinkel, jonnybojangles, lgedeon, Willscrlt, Denis-de-Bernardy, lexiqueen, sky_76, welcher, westonruter, ramiy, joyously.
Fixes#12563.
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Making incorrect assumptions about microdata used in a theme results in invalid markup.
The attribute can still be added using the `get_custom_logo` or `wp_get_attachment_image_attributes` filter, but it should not be added by default.
Props henry.wright, tfrommen, afercia, markcallen, zodiac1978.
Fixes#37305.
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This allows screen readers to properly announce each search landmark region independently.
Introduce `search_form_args` filter for the arguments used when generating the search form.
Props afercia, williampatton.
Fixes#42057.
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Because the names of the `get_header()`, `get_footer()`, `get_sidebar()`, and `get_template_part()` functions indicate that a value is returned, some plugins and themes already have `echo get_template_part()` in their codebase. Adding a return value to these functions using the approach in [44678] will cause the two unintended side effects of unexpected content being sent to the browser, and accidental path disclosure.
Reverts [44678].
Props davidbinda.
See #40969.
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The `get_header()`, `get_footer()`, `get_sidebar()`, and `get_template_part()` functions all call `locate_template()` as their final action, which returns the name of the template being loaded. Returning this value helps handle problems with templates being loaded.
Props tferry.
Fixes#40969.
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John Blackbourn
ryelle
Felix Arntz
Sergey Biryukov
desrosj
Dominik Schilling
Andrea Fercia
youknowriad
Aaron Jorbin
joedolson
Peter Wilson
Gary Pendergast
Adam Silverstein