Wordpress NextGen Gallery Plugin

The wordpress plugin "NextGen Gallery" requires php 5.2 or above but my CentOS is running 5.1. So I need to update it with the following steps:

step 1:

Add PHP 5.3 repository

# rpm -Uvh http://repo.webtatic.com/yum/centos/5/latest.rpm 

enable and install 

# yum --enablerepo=webtatic install php 

or update 

# yum --enablerepo=webtatic update php 

Congratulation, You/We have installed php5.3 

we can verify that it is installed or not by 

 [root@server tmp]# rpm -q php php-5.3.6-1.w5


** Remark
You may also want to install the GD library to allow WP resizes your images:
# yum --enablerepo=webtatic install php-gd