CentOS5.5使用yum安装了php环境后，发现是php4.x版本，使用最新的phpMyAdmin提示“PHP 5.2+ is required”，是由于php版本过低，需要PHP5.2以上版本，那么就需要更新下php
直接使用yum update php，提示无可用更新，看来需要更换源了
先导入key，添加额外源
# rpm --import http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka
修改utterramblings.repo
# vim /etc/yum.repos.d/utterramblings.repo
里面加入内容如下：
[utterramblings]name=Jason’s Utter Ramblings Repobaseurl=http://www.jasonlitka.com/media/EL$releasever/$basearch/enabled=1gpgcheck=1gpgkey=http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka
保存，退出，重新运行yum update php
一路yes下去，ok了，检查下，更新为PHP 5.2.16版本
[root@MyLinux ~]# php -vPHP 5.2.16 (cli) (built: Dec 17 2010 14:09:03)Copyright (c) 1997-2010 The PHP GroupZend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies
-----------------------------------------邪恶的分割线-------------------------------------------
又看到一个源，你试试呢，我还没试:
# wget http://centos.ustc.edu.cn/CentOS-Base.repo# cp CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo# rpm --import http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
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