[CentOS] PHP Source

[John Doe]

From: Ron Young <ronyoung at nc.rr.com>
>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.

Looked into SRPMS ?
Like: http://mirror.centos.org/centos/5/os/SRPMS/

JD