Php uninstalling and upgrading problem
 

I installed php while installing linux Red Hat 7.2
Php version installed by default is little old. I need to upgrade php to latest version. But when I tried to uninstall old versin of php it says can't uninstall beacuse of some dependencies.
Problem is now I can't uninstall php and can't upgrade it.
I need to compile php with few features.
Is there any rpm available for the latest php version or is it possible in rpm we can enable or disable features while installing.
Please let me know.
Thanks.

What dependecies fail?