instalar php-devel en CentOS 5

[kromack]

Buenas, estoy tratando de ejecutar phpize, pero necesito instalar php-devel y no he podido, me sale que no lo encuentra,

[root@www oci8-1.4.9]# yum install php-devel
Loaded plugins: fastestmirror, protectbase
Repository c5-testing is listed more than once in the configuration
Repository c5-testing is listed more than once in the configuration
Repository remi is listed more than once in the configuration
Repository remi-test is listed more than once in the configuration
Loading mirror speeds from cached hostfile
* base: mirror.beyondhosting.net
* centosplus: mirror.vcu.edu
* epel: mirror.symnds.com
* epel-debuginfo: mirror.symnds.com
* epel-source: mirror.symnds.com
* epel-testing: mirror.symnds.com
* epel-testing-debuginfo: mirror.symnds.com
* epel-testing-source: mirror.symnds.com
* extras: ftp.usf.edu
* remi: remirpm.mirror.gymkl.ch
* remi-test: remirpm.mirror.gymkl.ch
* updates: mirror.raystedman.net
Excluding Packages in global exclude list
Finished
Reducing CentOS-5 Testing to included packages only
Finished
0 packages excluded due to repository protections
Setting up Install Process
No package php-devel available.

si alguien me puede colaborar con los pasos a seguir uno a uno, ya que no soy muy experto en el tema se lo agradeceria.