Redis on PHP7 for Centos 7

Add Redis

yum install redis

Install PHP 7

yum install php72w-pecl-redis

Configure Redis

vi /etc/redis.conf
maxmemory 128mb
maxmemory-policy allkeys-lru

Enabling Redis modules

systemctl enable redis
systemctl start redis

SE module

setsebool -P httpd_can_network_connect 1

Configure WordPress for Redis

Next, edit the wp-config.php file to add a cache key salt with the name of your site (or any string you would like).

define('WP_CACHE_KEY_SALT', 'sitename.com');

Installing the Redis Object Cache plugin

 
Notice the “Connected” status as well as your accurate Host, Port, Database and Password.