* `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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Sergey Biryukov
John Blackbourn
desrosj
Aaron Jorbin
joedolson
Andrea Fercia
Peter Wilson
Gary Pendergast