这次更新使用的是jasonlitka的yum更新源
# rpm --import http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka
# vi /etc/yum.repos.d/CentOS-Base.repo
[utterramblings]
name=Jason's Utter Ramblings Repo
baseurl=http://www.jasonlitka.com/media/EL$releasever/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka
yum update php -y
yum install libmcrypt -y