Install memcached on CentOS 7
To install memcached on CentOS 7, run
yum -y install memcached
Set memcached to start on boot
systemctl enable memcached
Start memcached with
systemctl start memcached
Installing PHP Module
You need remi repository installed, which provide a memcached module for all versions of php they support.
For PHP 5.6, run
yum install php-memcache
Now phpinfo() will show
See memcached