REHL: Install latest PHP (5.2.x) from Remi repository

A few app requires PHP 5.2.x but major repositories is yet support anything higher than 5.1.6 at this time. Recompile PHP is a pain also.

Remi maintains a repository that can save your 1 day or 2 if you have such need.

cd /etc/yum.repos.d/
wget http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-3.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-5.rpm
rpm -Uvh remi-release-5*.rpm epel-release-5*.rpm

You now have Remi repository on your system. It's disabled by default, and I recommend you leave it as is. To install from remi, run the following:

yum --enablerepo=remi update php

I use remi to install php and its related stuff like GD, mcrypt, etc. As well as MySQL. The repository rocks!