先安装 库

yum install libevent

http://download.fedora.redhat.com/pub/epel/5/x86_64/

wget http://download.fedora.redhat.com/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm

rpm -Uvh epel-release-5-4.noarch.rpm

yum install memcached

停止 epel repo

/etc/yum.repos.d

epel 文件删除

或者

rpm 卸载

rpm -e epel-release-5-4.noarch

yum install php-memcache