building php5 with postgres support

[Noah]

Hi there,

I commonly build php5 from /usr/ports and would like to automatically 
have postgres support be compiled ever time I build php5.

I do not see a 'make config' option for including the postgres 
extensions, additions, and/or libraries.  What can I do so my 
portinstall and updates via portmanager always build php5 with postgres 
support?

Cheers,

Noah