[thelist] Simple PHP techniques for building navigation

[Fred D Yocum]

I would like to build a set of navigational links on a series of pages 
which are generated using php. 

What I want is scripting that is executed at the beginning of the page 
load that figures out where the page is in the site structure and then as 
it builds the navigational links applies that variable to create correct 
relational links. Is there a  simple script set (a function to figure out 
where the file is , a function to create the links relationally back to 
the main pages in the Web site) which will give me a leg up on getting 
this done? Any pointers to simple scripts? 

TIA
F D Yocum