=== Redis Object Cache ===
Contributors: tillkruess
Donate link: http://till.kruss.me/donations/
Tags: redis, predis, caching, cache, object cache, wp object cache, server, performance, optimize, speed, load
Requires at least: 3.3
Tested up to: 4.2
Stable tag: 1.0.2
License: GPLv3
License URI: http://www.gnu.org/licenses/gpl-3.0.html

A persistent object cache backend powered by Redis and the Predis library for PHP.


== Description ==

A persistent object cache backend powered by [Redis](http://redis.io/) and the [Predis](https://github.com/nrk/predis/) library for PHP. The Predis library requires PHP 5.4 or greater.

To adjust the connection parameters or prefixing cache keys, see [Other Notes](http://wordpress.org/extend/plugins/redis-cache/other_notes/).

Forked from Eric Mann's and Erick Hitter's [Redis Object Cache](https://github.com/ericmann/Redis-Object-Cache), which requires the Redis PECL extension.


== Installation ==

For detailed installation instructions, please read the [standard installation procedure for WordPress plugins](http://codex.wordpress.org/Managing_Plugins#Installing_Plugins).

1. Make sure Redis in installed and running.
2. Install and activate plugin.
3. Enable the object cache under _Tools -> Redis_.
4. If necessary, adjust [connection parameters](http://wordpress.org/extend/plugins/redis-cache/other_notes/).


== Connection Parameters ==

By default the object cache drop-in will connect to Redis over TCP at `127.0.0.1:6379` and select database `0`.

To adjust the connection parameters, define the following constants in your `wp-config.php`.

  * `WP_REDIS_SCHEME` [default: `tcp`]

      Specifies the protocol used to communicate with an instance of Redis. Internally the client uses the connection class associated to the specified connection scheme. By default Predis supports `tcp` (TCP/IP), `unix` (UNIX domain sockets) or `http` (HTTP protocol through Webdis).

  * `WP_REDIS_HOST` [default: `127.0.0.1`]

      IP or hostname of the target server. This is ignored when connecting to Redis using UNIX domain sockets.

  * `WP_REDIS_PORT` [default: `6379`]

      TCP/IP port of the target server. This is ignored when connecting to Redis using UNIX domain sockets.

  * `WP_REDIS_PATH` [default: not set]

      Path of the UNIX domain socket file used when connecting to Redis using UNIX domain sockets.

  * `WP_REDIS_DATABASE` [default: `0`]

      Accepts a numeric value that is used by Predis to automatically select a logical database with the `SELECT` command.

  * `WP_REDIS_PASSWORD` [default: not set]

      Accepts a value used to authenticate with a Redis server protected by password with the `AUTH` command.


== Prefixing Cache Keys ==

The `WP_CACHE_KEY_SALT` constant is provided to add a prefix to all cache keys.

Users with setups where multiple installs share a common `wp-config.php` or `$table_prefix` can use this constant to guarantee uniqueness for the keys generated by this object cache.


== Screenshots ==

1. Plugin settings page.


== Changelog ==

= 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


== Upgrade Notice ==

= 1.0.2 =

This update includes significant speed improvements and support for UNIX domain sockets.

= 1.0.1 =

This update includes several security, user interface and general code improvements.