Hello,
I think the links should be useful for someone who looking for PHP
5.2 RPM using at CentOS. Have fun!
http://oss.oracle.com/projects/php/
Overview
This project supplies PHP 5.2.9 RPM packages built for Oracle
Enterprise Linux 4.7 and 5.3 on x86 and x86_64. They will also install
on Red Hat Enterprise Linux.
The PHP command line, CGI interface, and an Apache module are
available. Various standard extensions are included, as well as the
OCI8 1.3.5 extension for Oracle Database access. The PDO_OCI driver
for the PDO extension is not currently included.
The packages are provided for installation convenience. They are not supported.