How do I install php-memcached?
The php-memcached package must be pulled from PECL, though it requires that you have install these two dependencies:
libmemcached.x86_64 : Client library and command line tools for memcached server
libmemcached-devel.x86_64 : Header files and development libraries for libmemcached
To start, install the libmemcached packages:
yum install libmemcached libmemcached-devel
Afterwards, you can install the memcached extension through the WHM Module Installer for your PHP Version.