.. on making a DB map?

Hopefully someone knows of a tool/util.

Here's where I'm coming from:
We have a list of changes to make to our DB and the PHP interface.

I'd like to put together a list (map) of every table referenced on
each php page, as well as one showing every php page which uses each
table.

I'd like to have this as a reference so that when we bring in a
programmer, they can work more efficiently and be less likely to
create bugs.

Any ideas?

-Mo