#yum install memcached
#yum install libmemcached
Even though memcached is happily running on the server, it’s not accessible from PHP without the PECL extension. Fortunately this is a very easy process, just use the pecl command.
# pecl install memcache
https://linuxnlenux.wordpress.com/2013/07/28/memcache-installation-in-cpanel-server-via-yum/