Changelog

2.0.3

Version 2.0 is a significant rewrite of the plugin. Please read the v2.0.0 release notes.

• Hide “Metrics” tab when metrics are disabled
• Fixed admin.js not loading in multisite environments
• Avoid fatal error when interacting with metrics but Redis went away
• Added WP_Object_Cache::__get() for backwards compatibility

2.0.2

• Updated POT file and comments for translators

2.0.1

• Support older versions of Query Monitor
• Made “Dropin” status more helpful
• Hide Redis version in settings when it isn’t available
• Collapsed dependency paths using composer-custom-directory-installer package
• Prevent QM_Collector conflicts with other plugins
• Prevent metric issues when cache is not available
• Fixed “Settings” link in plugin list
• Fixed WP_REDIS_DISABLED logic

2.0.0

Version 2.0 is a significant rewrite. The plugin now requires PHP 5.6, just like WordPress 5.2 does.

The GitHub and Composer repository was moved from tillkruss/redis-cache to rhubarbgroup/redis-cache.

• Require PHP 5.6
• Plugin is now “network-only”
• Switch to WPCS for code standards
• Overhauled the settings screen
• Added object cache metrics (on dashboard widget and settings)
• Added support for Query Monitor
• Added Rhubarb\RedisCache namespace to all files
• Added support for WP 5.5’s new wp_cache_get_multi() function
• Added redis_object_cache() function to retrieve plugin instance
• Added dropin warnings to network dashboard
• Added support for setting Sentinel database numbers
• Support Redis 6 ACL username and password authentication
• Support overwriting existing dropin on setting screen
• Use singleton pattern to instantiate plugin
• Use Composer to install and load Predis
• Update object cache dropin during plugin update
• Use separate methods to connect with all clients
• Removed CUSTOM_USER_TABLE and CUSTOM_USER_META_TABLE weirdness
• Added themes as ignored group
• Changed default connection and read timeout to 1 second
• Prevent race condition in add_or_replace()
• Renamed WP_CACHE_KEY_SALT to WP_REDIS_PREFIX for clarity
• Replaced “slave” terminology with “replica”
• Only SELECT database when it’s not 0

1.6.1

• Fixed issue with footer comment showing during AJAX requests

1.6.0

• Improved group name sanitization (thanks @naxvog)
• Prevent fatal error when replacing foreign dropin
• Added HTML footer comment with optional debug information
• Removed prefix suggestions

The HTML footer comment only prints debug information when WP_DEBUG is enabled. To disable the comment entirely, set the WP_REDIS_DISABLE_COMMENT constant to true.

1.5.9

• Fixed missing $info variable assignment in constructor
• Fixed MaxTTL warning condition
• Switched to using default button styles

1.5.8

• Added warning message about invalid MaxTTL
• Added warning about unmaintained Predis library
• Added suggestion about shorter, human-readable prefixes
• Added Redis Cache Pro compatibility to settings
• Fixed flushing the cache when the prefix contains special characters
• Fixed calling Redis INFO when using clusters
• Cleaned up the settings a little bit

1.5.7

• Added support for PhpRedis TLS connections
• Added support for timeout, read timeout and password when using PhpRedis cluster
• Fixed issue with INFO command
• Fixed object cloning when setting cache keys

1.5.6

• Added object cloning to in-memory cache
• Fixed PHP notice related to read_timeout parameter

1.5.5

Please flush the object cache after updating the drop to v1.5.5 to avoid dead keys filling up Redis memory.

• Removed lowercasing keys
• Remove scheduled metrics event
• Fixed Redis version call when using replication

1.5.4

• Removed metrics

1.5.3

• Fixed: Call to undefined function get_plugin_data()
• Fixed: Call to undefined method WP_Object_Cache::redis_version()

1.5.2

• Added Redis version to diagnostics
• Added WP_REDIS_DISABLE_BANNERS constant to disable promotions
• Fixed an issue with redis.replicate_commands()

1.5.1

This plugin turned 5 years today (Nov 14th) and its only fitting to release the business edition today as well.
Redis Cache Pro is a truly reliable, highly optimized and easy to debug rewrite of this plugin for SMBs.

• Added execution times to actions
• Added WP_REDIS_VERSION constant
• Fixed PhpRedis v3 compatibility
• Fixed an issue with selective flushing
• Fixed an issue with mb_* functions not existing
• Replaced Email Address Encoder card with Redis Cache Pro card
• Gather version metrics for better decision making

1.5.0

Since Predis isn’t maintained any longer, it’s highly recommended to switch over to PhpRedis (the Redis PECL extension).

• Improved Redis key name builder
• Added support for PhpRedis serializers
• Added redis_object_cache_error action
• Added timeout, read-timeout and retry configuration
• Added unflushable groups (defaults to ['userlogins'])
• Fixed passwords not showing in server list

1.4.3

• Require PHP 5.4 or newer
• Use pretty print in diagnostics
• Throw exception if Redis library is missing
• Fixed cache not flushing for some users
• Fixed admin issues when WP_REDIS_DISABLED is false

1.4.2

• Added graceful Redis failures and WP_REDIS_GRACEFUL constant
• Improved cluster support
• Added redis_cache_expiration filter
• Renamed redis_object_cache_get filter to redis_object_cache_get_value

1.4.1

• Fixed potential fatal error related to wp_suspend_cache_addition()

1.4.0

• Added support for igbinary
• Added support for wp_suspend_cache_addition()

1.3.9

• Fixed WP_REDIS_SHARDS not showing up in server list
• Fixed WP_REDIS_SHARDS not working when using PECL extension
• Removed WP_REDIS_SCHEME and WP_REDIS_PATH leftovers

1.3.8

• Switched from single file Predis version to full library

1.3.7

• Revert back to single file Predis version

1.3.6

• Added support for Redis Sentinel
• Added support for sharing
• Switched to PHAR version of Predis
• Improved diagnostics
• Added WP_REDIS_SELECTIVE_FLUSH
• Added $fail_gracefully parameter to WP_Object_Cache::__construct()
• Always enforce WP_REDIS_MAXTTL
• Pass $selective and $salt to redis_object_cache_flush action
• Don’t set WP_CACHE_KEY_SALT constant

1.3.5

• Added basic diagnostics to admin interface
• Added WP_REDIS_DISABLED constant to disable cache at runtime
• Prevent “Invalid plugin header” error
• Return integer from increment() and decrement() methods
• Prevent object cache from being instantiated more than once
• Always separate cache key prefix and group by semicolon
• Improved performance of build_key()
• Only apply redis_object_cache_get filter if callbacks have been registered
• Fixed add_or_replace() to only set cache key if it doesn’t exist
• Added redis_object_cache_flush action
• Added redis_object_cache_enable action
• Added redis_object_cache_disable action
• Added redis_object_cache_update_dropin action

1.3.4

• Added WP-CLI support
• Show host and port unless scheme is unix
• Updated default global and ignored groups
• Do a cache flush when activating, deactivating and uninstalling

1.3.3

• Updated Predis to v1.1.1
• Added redis_instance() method
• Added incr() method alias for Batcache compatibility
• Added WP_REDIS_GLOBAL_GROUPS and WP_REDIS_IGNORED_GROUPS constant
• Added redis_object_cache_delete action
• Use WP_PLUGIN_DIR with WP_CONTENT_DIR as fallback
• Set password when using a cluster or replication
• Show Redis client in stats()
• Change visibility of $cache to public
• Use old array syntax, just in case

1.3.2

• Make sure $result is not false in WP_Object_Cache::get()

1.3.1

• Fixed connection issue

1.3

• New admin interface
• Added support for wp_cache_get()‘s $force and $found parameter
• Added support for clustering and replication with Predis

1.2.3

• UI improvements

1.2.2

• Added redis_object_cache_set action
• Added redis_object_cache_get action and filter
• Prevented duplicated admin status messages
• Load bundled Predis library only if necessary
• Load bundled Predis library using WP_CONTENT_DIR constant
• Updated stats() method output to be uniform with WordPress

1.2.1

• Added composer.json
• Added deactivation and uninstall hooks to delete object-cache.php
• Added local serialization functions for better advanced-cache.php support
• Updated bundled Predis version to 1.0.3
• Updated heading structure to be semantic

1.2

• Added Multisite support
• Moved admin menu under Settings menu
• Fixed PHP notice in get_redis_client_name()

1.1.1

• Call select() and optionally auth() if HHVM extension is used

1.1

• Added support for HHVM’s Redis extension
• Added support for PECL Redis extension
• Added WP_REDIS_CLIENT constant, to set preferred Redis client
• Added WP_REDIS_MAXTTL constant, to force expiration of cache keys
• Improved add_or_replace(), get(), set() and delete() methods
• Improved admin screen styles
• Removed all internationalization/localization from drop-in

1.0.2

• Added “Flush Cache” button
• Added support for UNIX domain sockets
• Improved cache object retrieval performance significantly
• Updated bundled Predis library to version 1.0.1

1.0.1

• Load plugin translations
• Hide global admin notices from non-admin users
• Prevent direct file access to redis-cache.php and admin-page.php
• Colorize “Disable Object Cache” button
• Call Predis\Client->connect() to avoid potential uncaught Predis\Connection\ConnectionException

1.0

• Initial release