$ sudo apt-get install php5-dev

$ git clone git://github.com/nicolasff/phpredis.git

$ cd phpredis
$ phpize
$ ./configure
$ make
$ sudo make install

$ sudo -s
$ echo "extension=redis.so" > /etc/php5/conf.d/redis.ini
$ exit

$ sudo service apache2 reload

class TestsController extends AppController {
    public $uses = array();

    public function index() {
        $this->autoRender = false;

        $r = new Redis();
        $r->connect('localhost');

        debug($r->keys('*c*'));

        foreach ($r->keys('*c*') as $index => $key) {
            debug($key);
            debug($r->get($key));
        }
    }
}