When installing memcached on my CentOS 5.2 box using the rpmforge repo, I found apache/php complaining of API version problems.

To get round it I first used PECL to install memcached, then used yum to set memcached to work nicely with the Redhat style environment. # pecl install memcache # yum --enablerepo=rmpforge install memcached # yum install php-pecl-memcache

Thinking back, I believe I needed libevent, libevent-devel, zlib and zlib-devel to get the PECL install to work too. # yum install libevent libevent-devel zlib zlib-devel I saw the errors initially when version checking PHP.. after restarting apache the following command seems happy… # php More >