If you want to install PHP 5.2.x instead of the PHP 5.1.6 offered with default CentOSPlus repo. Please consider installing the utterramblings repo. Setting up this repo is a breeze … just follow these steps

nano -w /etc/yum.repos.d/utterramblings.repo

(I prefer nano as I mentioned earlier in my posts but you can use vi or any other editor that you like)

Then paste the following code in the editor

[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

Hit Ctrl+X and it will prompt you to save this file, you need to confirm this with punching Y

Now comes the last step, type the following and everything will be updated

yum update

Enjoy the latest packages

Note: PHP 5.3.0 is still not available in stable repos because the Zend Optimizer is still in Beta for that particular version.

Related posts:

1. How to Install Apache, PHP and MySQL on CentOS
2. Installing MySQL 5.1 on Ubuntu
3. Installing / re-installing and Configuring phpMyAdmin on Ubuntu
4. How to Install Webmin in CentOS
5. Creating and Installing crontabs using CodeIgniter