Redis extension for PHP

Allow to integrate the phpredis extension.

> The phpredis extension provides an API for communicating with the Redis key-value store. It is released under the PHP License, version 3.01. This code has been developed and maintained by Owlient from November 2009 to March 2011

[https://github.com/nicolasff/phpredis](https://github.com/nicolasff/phpredis)