While web crawlers are able to discover pages from links within the site and from other sites, XML sitemaps supplement this approach by allowing crawlers to quickly and comprehensively identify all URLs included in the sitemap and learn other signals about those URLs using the associated metadata.
See https://make.wordpress.org/core/2020/06/10/merge-announcement-extensible-core-sitemaps/ for more details.
This feature exposes the sitemap index via `/wp-sitemap.xml` and exposes a variety of new filters and hooks for developers to modify the behavior. Users can disable sitemaps completely by turning off search engine visibility in WordPress admin.
This change also introduces a new `esc_xml()` function to escape strings for output in XML, as well as XML support to `wp_kses_normalize_entities()`.
Props Adrian McShane, afragen, adamsilverstein, casiepa, flixos90, garrett-eclipse, joemcgill, kburgoine, kraftbj, milana_cap, pacifika, pbiron, pfefferle, Ruxandra Gradina, swissspidy, szepeviktor, tangrufus, tweetythierry.
Fixes#50117.
See #3670. See #19998.
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Patches occasionally come in on generated files. We should be kind to new contributors and give them a hint that these files are auto-generated.
This is a follow-up to [41271], which added the banner to minified CSS files.
Fixes#48424. See #30666.
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Introduce `make_clickable_rel` filter for the `rel` value that is added to URL matches converted to links.
This is a follow-up to [46349], which added the `rel="nofollow ugc"` attribute to existing `<a>` tags in comments via `wp_rel_ugc()`.
UGC stands for User Generated Content, and the `ugc` attribute value is recommended for links within user generated content, such as comments and forum posts.
See https://webmasters.googleblog.com/2019/09/evolving-nofollow-new-ways-to-identify.html.
Props blogginglife, SergeyBiryukov.
Reviewed by desrosj, audrasjb.
Fixes#48022.
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Slashing non-string data caused PUT requests containing unmodified meta arrays of integers to fail the check against the existing stored meta value, causing a 500 when posting an unmodified response body back to the server.
Props TimothyBlynJacobs, augustuswm.
Fixes#48264.
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When a theme declares HTML5 support for script and styles via `add_theme_support( 'html5', array( 'script', 'style' ) )`, the `type="text/javascript"` and `type="text/css"` attributes are omitted.
These attributes are unnecessary in HTML5 and cause warnings in the W3C Markup Validation Service.
Props sasiddiqui, swissspidy, knutsp, SergeyBiryukov.
See #42804.
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The path to magic quote sanity took a fun and exciting turn: PHP core removed it and WordPress updated the minimum version.
For the formally external pclzip, the code is commented out to make investigating easier and in case we ever need to merge upstream (if that still exists) changes.
Props ayeshrajans, jrf, jorbin.
See #47783.
Fixes#18322.
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This changeset includes a major iteration on the regular expression used to balance tags, with comprehensive test coverage to ensure that all scenarios are supported or unsupported as expected.
Props dmsnell, westonruter, birgire.
Fixes#47014.
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This upgrade adds support for the transgender flag: 🏳️⚧️
There's some additional housekeeping in this commit:
- Twemoji recently rearranged their repository and package, so `Gruntfile.js` needed tweaking to allow for that.
- As only new files were added in this Twemoji release, the CDN version didn't need updating.
Fixes#47852.
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Noteable changes:
- The `magic_quotes_runtime` and `magic_quotes_sybase` settings were removed in PHP 5.4, so no longer need to be set.
- Some functions that use external libraries can generate errors that can't be tested for, so are globally allowed to silence errors.
- Quite a few functions would cause errors if `safe_mode` was set. This setting was removed in PHP 5.4.
- Only a handful of `header()` calls needed corresponding `headers_sent()` checks for unit tests to pass, but more may need to be added as the nightlies builds are tested.
See #46732.
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Following [45585], older versions of PHP could segfault when attempting to autop paragraphs with 10,000+ characters.
Rather than having to negative lookahead for every character in the paragraph (which could run into recursion limits), we can quickly jump ahead to the next tag and start checking from there.
See #27350.
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