Installing php on Centos 6 offline

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http://serverfault.com – I have just installed CENTOS 6 on an internal network with no Internet Access. Not very familiar with LINUX/CENTOS, I managed to get httpd service started and I believe PHP wasn't installed. As the machine is not connected to the Internet, it will not be able to use YUM directly. How do I go about installing PHP and their dependencies, or the only way is to download the source codes and build it on my own? (HowTos)