Reconfiguration notes for Debian

Dear Documentation Team, The manual is really great and and well presented. However, I had a problem with finding out how to reconfigure php for Debian. I am a relatively new user to Debian. The installation of php in Debian via apt-get was covered in user comments and since there are front end tools, it was quite easy. However, I could not find the "configure" script for php installed through apt-get ,and I did not find documentation similar to USE in Gentoo (which you have a seperate article on" for Debian specific reconfigureation. I did not find out how to use Debian> dpkg-reconfgure php4 to get an extension. I think a seperate article similar to the "Gentoo Installation Notes" would be helpful. Thank you, Stephen