I used atomic-release-1.0-11.el5.art.noarch.rpm.. this is what it does when I execute it
Atomic Archive installer, version 1.1
Configuring the [atomic] yum archive for this system
Installing the Atomic GPG key: OK
Downloading atomic-release-1.0-11.el5.art.noarch.rpm: OK
The Atomic Rocket Turtle archive has now been installed and configured for your system
The following channels are available:
atomic - [ACTIVATED] - contains the stable tree of ART packages
atomic-testing - [DISABLED] - contains the testing tree of ART packages
atomic-bleeding - [DISABLED] - contains the development tree of ART packages
Then yum upgrade php:
yum upgrade php
Loading "fastestmirror" plugin
Loading mirror speeds from cached hostfile
* base: mirror.nwresd.org
* updates: mirror.chpc.utah.edu
* addons: mirror.nwresd.org
* extras: mirror.web-ster.com
base 100% |=========================| 2.1 kB 00:00
updates 100% |=========================| 1.9 kB 00:00
addons 100% |=========================| 951 B 00:00
extras 100% |=========================| 2.1 kB 00:00
Setting up Upgrade Process
Could not find update match for php
No Packages marked for Update