RedHat 6 - php-devel package?

I am trying to migrate some servers from 5.5 to 6.0 x86_64, and have been running into the usual package name change issues, but one issue that I can't resolve is php-devel.  Seems to be missing when I try to do a yum search/yum install.  I need to get "phpize" and a few other things which have traditionally been in the php-devel package.  Anyone know what happened to the package, or which other one now has the development libs/tools?  I'd prefer a sanctioned Red Hat package rather than just pulling something off the web.  Thanks much.