[CentOS] PHP Source

I have a pressing need to compile a utility called odbtp into php on my new 64 bit machine with an AMD chip that is currently running CentOS 5.6.

Where can I find the source files for the CentOS recommended versions of php. I have searched the CentOS and related repository sites and can find php in several places but not the source files.

Thanks in advance.

Regards,

Ron Young 919-621-9015 http://www.linkedin.com/in/ronhyoung

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