Remi Dependency on CentOS 6 and Red Hat (RHEL) 6:
# rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
CentOS 6 and Red Hat (RHEL) 6:
# rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
Update your PHP:
# yum --enablerepo=remi,remi-test install httpd php php-common
CentOS 6.3/6.2/6.1/6/5.8 and Red Hat (RHEL) 6.3/6.2/6.1/6/5.8
Update your modules:
# yum --enablerepo=remi,remi-test install php-pecl-apc php-cli php-pear php-pdo php-mysql php-pgsql php-pecl-mongo php-sqlite php-pecl-memcache php-pecl-memcached php-gd php-mbstring php-mcrypt php-xml
http://www.if-not-true-then-false.com/2010/install-apache-php-on-fedora-centos-red-hat-rhel/