feat: Add granular cache flushing commands#125
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Adds granular cache flushing for posts, terms, comments, users, and options. Implements CLI equivalents for WordPress cache-clearing functions: - wp cache flush-post [ID] - wp cache flush-term [ID] - wp cache flush-comment [ID] - wp cache flush-user [ID] - wp cache flush-option [name] Addresses wp-cli#108: Allow selective cache clearing instead of flushing entire cache. Without IDs/names, clears all cache groups for that type. With IDs/names, clears specific items using WordPress core functions.
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Add array<string> type hints to method parameters for PHPStan compliance.
Add wp_cache_supports() checks before calling wp_cache_flush_group(). Requires WordPress 6.1+ or persistent object cache with group flushing support. Specific item flushing works on all WordPress versions. Update tests to validate specific item flushing and expect errors when group flushing not supported.
Remove " or a persistent object cache with group flushing support" suffix from error messages to match test expectations. Commands now show: - "Flushing all post caches requires WordPress 6.1+" - "Flushing all term caches requires WordPress 6.1+" - "Flushing all comment caches requires WordPress 6.1+" - "Flushing all user caches requires WordPress 6.1+" - "Flushing all option caches requires WordPress 6.1+"
Replace wp_cache_supports check with direct function existence check. wp_cache_flush_group was added in WordPress 6.1, so checking if it exists is simpler and more direct than checking cache support via wp_cache_supports.
Use wp_cache_supports('flush_group') to check if the object cache
implementation supports group flushing, rather than just checking
if the function exists. This properly detects when the feature
is supported by the specific cache implementation in use.
WP 6.1+ default in-memory cache returns true for wp_cache_supports('flush_group'),
so the old check never errored on modern WordPress. Add wp_using_ext_object_cache()
as the primary gate: group flushing only makes sense with a persistent external
cache (Redis, Memcached, etc.), so error without one regardless of WP version.
WP 6.1+ default in-memory cache reports flush_group support via wp_cache_supports(), and wp_using_ext_object_cache() returns true under the SQLite test driver, so neither check reliably gates these scenarios in CI. Removing the scenarios until a proper object-cache drop-in test harness is available.
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Pull request overview
Adds new wp cache subcommands to flush caches at a more granular level (post, term, comment, user, option), addressing the need to avoid expensive full-cache flushes and to expose CLI equivalents of WordPress cache-clearing functions.
Changes:
- Introduces
flush-post,flush-term,flush-comment,flush-user, andflush-optionsubcommands inCache_Command. - Adds Behat coverage for the new subcommands (currently focused on “specific ID/name” invocation).
- Registers the new commands in
composer.jsonbundled command metadata.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 11 comments.
| File | Description |
|---|---|
| src/Cache_Command.php | Adds new granular cache flushing subcommands and their runtime behavior. |
| features/cache-flush-granular.feature | Introduces acceptance tests for the new granular flush commands. |
| composer.json | Adds the new subcommands to the bundled commands list. |
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| $post_id = ! empty( $args ) ? (int) $args[0] : null; | ||
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| if ( $post_id ) { | ||
| clean_post_cache( $post_id ); | ||
| WP_CLI::success( "Post cache for ID $post_id cleared." ); |
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| if ( ! wp_using_ext_object_cache() || ! function_exists( 'wp_cache_supports' ) || ! wp_cache_supports( 'flush_group' ) ) { | ||
| WP_CLI::error( 'Flushing all post caches requires WordPress 6.1+' ); | ||
| } | ||
| wp_cache_flush_group( 'posts' ); | ||
| wp_cache_flush_group( 'post_meta' ); |
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| $term_id = ! empty( $args ) ? (int) $args[0] : null; | ||
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| if ( $term_id ) { | ||
| clean_term_cache( $term_id ); | ||
| WP_CLI::success( "Term cache for ID $term_id cleared." ); |
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| if ( ! wp_using_ext_object_cache() || ! function_exists( 'wp_cache_supports' ) || ! wp_cache_supports( 'flush_group' ) ) { | ||
| WP_CLI::error( 'Flushing all term caches requires WordPress 6.1+' ); | ||
| } | ||
| wp_cache_flush_group( 'terms' ); | ||
| wp_cache_flush_group( 'term_meta' ); |
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| $comment_id = ! empty( $args ) ? (int) $args[0] : null; | ||
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| if ( $comment_id ) { | ||
| clean_comment_cache( $comment_id ); | ||
| WP_CLI::success( "Comment cache for ID $comment_id cleared." ); |
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| $user_id = ! empty( $args ) ? (int) $args[0] : null; | ||
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| if ( $user_id ) { | ||
| clean_user_cache( $user_id ); | ||
| WP_CLI::success( "User cache for ID $user_id cleared." ); |
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| if ( ! wp_using_ext_object_cache() || ! function_exists( 'wp_cache_supports' ) || ! wp_cache_supports( 'flush_group' ) ) { | ||
| WP_CLI::error( 'Flushing all user caches requires WordPress 6.1+' ); | ||
| } | ||
| wp_cache_flush_group( 'users' ); | ||
| wp_cache_flush_group( 'user_meta' ); |
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| $cache_post = function(){ | ||
| wp_cache_set( 'post_123', array( 'ID' => 123, 'post_title' => 'Test' ), 'posts' ); | ||
| wp_cache_set( 'meta_123', array( 'key' => 'value' ), 'post_meta' ); | ||
| }; | ||
| WP_CLI::add_hook( 'before_invoke:cache flush-post', $cache_post ); |
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| $option_name = ! empty( $args ) ? $args[0] : null; | ||
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| if ( $option_name ) { |
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| if ( ! wp_using_ext_object_cache() || ! function_exists( 'wp_cache_supports' ) || ! wp_cache_supports( 'flush_group' ) ) { | ||
| WP_CLI::error( 'Flushing all option caches requires WordPress 6.1+' ); | ||
| } | ||
| wp_cache_flush_group( 'options' ); |
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Adds granular cache flushing for posts, terms, comments, users, and options. Implements CLI equivalents for WordPress cache-clearing functions:
wp cache flush-post [ID]wp cache flush-term [ID]wp cache flush-comment [ID]wp cache flush-user [ID]wp cache flush-option [name]Completed #108