What is the best way to build php from source CentOS

I am building php from source on a new CentOS box and as usual I have to wrangle up all the various configuration options I might need. This gets tricky because there are various extensions that I want and certain options that I always for get to put in the .configure script. Not only that but PHP 5.3 has has different defaults for various options.

Is there an interactive or annotated version of the configure s开发者_开发问答cript somewhere or a good set of defaults to reference?

Thanks!

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Grab the existing PHP SRPM, update the spec with the new version, release, and tarball, and rebuild.