PHP backports for WP 6.8

[Mamaduka]

• Feature: Set editor rendering mode by post type wordpress-develop#7129
  • Feature: Set editor rendering mode by post type #62304
  • Plugin: Fix eligibility check for post types' default rendering mode #67879
• Fix wav file not getting uploaded in Gutenberg  wordpress-develop#7265
  • Media: add x-wav mime type for wav files in Firefox #66850
  • Media: check for wav mime type using isset  #66947
• Theme JSON: remove redundant check and relocate $selectors assignment wordpress-develop#7575
  • Theme JSON: remove redundant check and relocate $selectors assignment #66154
• Block editor: remove reusable blocks and pattern UI stylesheets from iframe wordpress-develop#7604
  • Block editor: remove reusable blocks stylesheet from iframe #66285
  • Clean up: adjust reusable-blocks dependencies #66302
  • Block editor: remove patterns UI stylesheet from iframe #66306
• Site Editor: remove content styles outside canvas wordpress-develop#7643
  • Site Editor: remove content styles outside canvas #66432
  • Site Editor: restore block-library editor.css outside canvas #66556
• Global styles: preload user global styles based on user caps wordpress-develop#7681
  • Global styles: preload user global styles based on user caps #66541
• Site editor: preload settings wordpress-develop#7687
  • Site Editor: preload settings requests #66488
  • Preload: fix e2e test #67497
• Site editor: preload post and template lookups if needed wordpress-develop#7695
  • Site editor: preload post if needed #66631
  • Preload: parse post ID from p (path) #67465
  • Site Editor: speed up load by preloading home and front-page templates #66579
  • Site Editor: Pages: Preload template lookup #66654
  • [mini] Preload: add post type #67518
• Theme JSON: replace top-level background style objects on merge wordpress-develop#7697
  • Theme JSON: replace top-level background style objects on merge #66656
• Theme JSON Resolver: remove theme json merge in resolve_theme_file_uris wordpress-develop#7698
  • Theme JSON Resolver: remove theme json merge in resolve_theme_file_uris #66662
• Section Styles: Fix removal of insecure properties for block style variations wordpress-develop#7759
  • Section Styles: Fix insecure properties removal for inner block types and elements #66896
• Theme JSON: include block style variations in path only output of get_block_nodes wordpress-develop#7784
  • Theme JSON: include block style variations in path only output of get_block_nodes #66948
• Theme.json: Fix complex variation selectors when using selectors API wordpress-develop#7825
  • Block Style Variations: Fix complex variation selectors when using selectors API #67061
• REST API: Terms: Respect taxonomy's default query args wordpress-develop#7848
  • Terms: Respect order specified by register_taxonomy() #67154
• Add stylebook path to exceptions for classic themes in site editor. wordpress-develop#7865
  • Add stylebook screen for classic themes #66851
  • Stylebook: add the Appearance -> Design submenu through admin_menu action #68174
• Add default_template_part_areas and default_template_types to site index endpoint wordpress-develop#7895
  • Move default template types and template part areas to REST API #66459
• Block Hooks: Apply to Post Content (on frontend and in editor) wordpress-develop#7898
  • Block Hooks: Apply to Post Content (on frontend and in editor) #67272
• Site Editor: Redirect old urls to the new path based ones wordpress-develop#7903
  • Site Editor: Use path based routing instead of query args and site-editor.php routes #67199
  • Fast follow: Redirections of deprecated site editor URLs. #68971
• REST API: Add support for search_columns argument to the REST API wordpress-develop#7909
  • REST API: Support search_columns argument in the user endpoint #67330
• Update docblocks for wp_get_global_stylesheet and WP_Theme_JSON::get_stylesheet. wordpress-develop#7976
  • Update global stylesheet docblocks with custom-css parameter. #67716
• Block Hooks: Apply to synced patterns wordpress-develop#8015
  • Synced Patterns: Apply Block Hooks #68058
• Fix/translatable strings in theme json wordpress-develop#8031
  • Make strings in theme.json translatable #66675
  • Add duotone and dimensions to the block level for translation #68243
• Changed Document Order wordpress-develop#8032
  • Updated @since Doc Order in Inline documentation #68003
• Editor: Set new default rendering mode for Pages wordpress-develop#8123
  • Editor: New default rendering mode for editor via post type supports #68549
  • Editor: Update post-type support key for new default rendering mode #68745
  • Editor: Conditionally enable the new default rendering mode for Pages #69160
  • Editor: Add an extra check before enabling the new default rendering mode for Pages #69209
• Block Hooks: Add apply_block_hooks_to_content_from_post_object wordpress-develop#8212
  • Block Hooks: Fix truncation of post content #68926
  • Block Hooks: Fix duplicated insertion in Post Content #69142
  • Block Hooks: Enable first/last child insertion next to Classic block #69241
• REST API: Add support for the 'ignore_sticky_posts' argument wordpress-develop#8228
  • REST API: Add support for the 'ignore_sticky_posts' argument #68970
• Editor: Fix 'parents' argument validation for Query block wordpress-develop#8245
  • Query Block: Fix 'parents' argument validation #68983
• Allow :focus-visible pseudo-selector to be set in theme.json wordpress-develop#8261
  • Allow :focus-visible pseudo-selector to be set in theme.json #68521
• Editor: Add option to ignore sticky posts in Query block wordpress-develop#8265
  • Query block: Add option to ignore sticky posts behavior #69057
• Block support: Add server-side processing for ariaLabel wordpress-develop#8274
  • Block support: Add server-side processing for ariaLabel #69096
• REST API: Add the site reading options to the index wordpress-develop#8345
  • REST API: Adds the site reading options to the index #69106
• Layout Support: Replace incremental IDs with hashes wordpress-develop#8353
  • Layout Support: Replace incremental IDs with hashes #68210
• Admin bar: Update the Edit Site link wordpress-develop#8372
  • Admin bar: Update the Edit Site link #69271
• Editor: Update REST API preloaded paths for 6.8 wordpress-develop#8441
  • Site Editor: Fix template lookup preloading for non-draft pages #69400
  • Editor: Preload template lookup #69454
• Site Editor: Add get parameter to hide admin bar in classic theme site preview wordpress-develop#8475
  • Site Editor: Hide admin bar in classic theme site preview #69514
  • Site Editor: Set IFRAME_REQUEST constant for classic theme site preview #69535
• REST API: Add additional default template data fields for the active theme wordpress-develop#8480
  • REST API: Add additional default template data fields for the active theme #69417

[Mamaduka]

I just noticed that PRs related to Block Comments are marked for backporting. The feature is still experimental, and these PRs aren't blockers for WP 6.8.

I will move the PHP core for experimental features into the correct directory.

PR in question:

• made changes for comment rest api to support with block commenting wordpress-develop#7488 - seems a general improvement for Comments API.
• allow custom comment type to fetch avatar urls in comment api wordpress-develop#7498

cc @peterwilsoncc

[joemcgill]

@Mamaduka it looks like WordPress/wordpress-develop#7575 listed here was merged in 6.7. See: https://core.trac.wordpress.org/changeset/59262

[Mamaduka]

@joemcgill, the list generation is automated, and it looks like the backport changelog file was incorrectly placed. Since it's already merged and doesn't add more work, I think we can keep it here for now.

[Mamaduka]

I'm going to close this. I think all required sync items are already done, and anything new can be handled directly in the core.

Thank you, @peterwilsoncc, for leading the efforts here 🦸