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Rewrite: extra_rules_top takes priority over extra_permastructs on regex conflicts - #12774

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SainathPoojary:fix/14991
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Rewrite: extra_rules_top takes priority over extra_permastructs on regex conflicts#12774
SainathPoojary wants to merge 3 commits into
WordPress:trunkfrom
SainathPoojary:fix/14991

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Trac ticket: #14991


This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

Copilot AI review requested due to automatic review settings July 30, 2026 14:18
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Pull request overview

This PR updates how WP_Rewrite::rewrite_rules() composes the final rewrite rules array so that rules in extra_rules_top take precedence over rules generated from extra_permastructs when they share the same regex key (per Trac #14991).

Changes:

  • Collect extra permastruct-generated rules into a separate $permastruct_rewrite array instead of merging them directly into extra_rules_top.
  • Switch the final rewrite-rule composition to use PHP array union (+) to prefer earlier keys on conflicts.

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Comment thread src/wp-includes/class-wp-rewrite.php Outdated
Comment on lines +1454 to +1458
// Put them together.
if ( $this->use_verbose_page_rules ) {
$this->rules = array_merge( $this->extra_rules_top, $robots_rewrite, $favicon_rewrite, $sitemap_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite, $author_rewrite, $date_rewrite, $page_rewrite, $post_rewrite, $this->extra_rules );
$this->rules = $this->extra_rules_top + $permastruct_rewrite + $robots_rewrite + $favicon_rewrite + $sitemap_rewrite + $deprecated_files + $registration_pages + $root_rewrite + $comments_rewrite + $search_rewrite + $author_rewrite + $date_rewrite + $page_rewrite + $post_rewrite + $this->extra_rules;
} else {
$this->rules = array_merge( $this->extra_rules_top, $robots_rewrite, $favicon_rewrite, $sitemap_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $page_rewrite, $this->extra_rules );
$this->rules = $this->extra_rules_top + $permastruct_rewrite + $robots_rewrite + $favicon_rewrite + $sitemap_rewrite + $deprecated_files + $registration_pages + $root_rewrite + $comments_rewrite + $search_rewrite + $author_rewrite + $date_rewrite + $post_rewrite + $page_rewrite + $this->extra_rules;
Comment thread src/wp-includes/class-wp-rewrite.php Outdated
// Put them together.
if ( $this->use_verbose_page_rules ) {
$this->rules = array_merge( $this->extra_rules_top, $robots_rewrite, $favicon_rewrite, $sitemap_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite, $author_rewrite, $date_rewrite, $page_rewrite, $post_rewrite, $this->extra_rules );
$this->rules = $this->extra_rules_top + $permastruct_rewrite + $robots_rewrite + $favicon_rewrite + $sitemap_rewrite + $deprecated_files + $registration_pages + $root_rewrite + $comments_rewrite + $search_rewrite + $author_rewrite + $date_rewrite + $page_rewrite + $post_rewrite + $this->extra_rules;
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SainathPoojary marked this pull request as ready for review July 31, 2026 10:25
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The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

Core Committers: Use this line as a base for the props when committing in SVN:

Props sainathpoojary.

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