First Check PHP version that is currently installed

$ php -version

Check Linux Version

$ cat /etc/*-release (or redhat-release)

Create a repo file with the content given below. As you can note, we are looking for package upgrade related to php only.

$ vi /etc/yum.repos.d/CentOS-phpupgrade.repo

# CentOS5-Upgrade: # This repository is a proving grounds for packages on their way to CentOSPlus and CentOS Extras. # They may or may not replace core CentOS packages, and are not guaranteed to function properly. # These packages build and install, but are waiting for feedback from testers as to # functionality and stability. Packages in this repository will come and go during the # development period, so it should not be left enabled or used on production systems without due # consideration. [cent5-upgrade] name=CentOS5 Upgrade baseurl=http://dev.centos.org/centos/$releasever/testing/$basearch/ enabled=1 gpgcheck=1 gpgkey=http://dev.centos.org/centos/RPM-GPG-KEY-CentOS-testing includepkgs=php*

Update the repository

$ yum update

Restart Apache server

$ service http restart

Check the PHP version that is installed

$ php -version

Check the package repository

$ rpm -qa | grep php