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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