Protect Access to a Directory

Hi, I am using PHP and MySQL in my application. I have created a Login System for using "Sessions". The problem that I am facing is that I need to protect a large number of pages in my website. So I have tried to use this method and it works fine for me : <? session_start(); if (session_is_registered("valid_user"))

     include ('guest.html');

else include 'not_logged_in.php'; ?> I get stumped here .... in order to be able to insert this code I have to write for each of the 400 html files, 400 php files with the same name. Most of the files are arranged in the form of directories. Is there a better way to be able to do this (Using PHP and MySQL). Thanks in advance ! Best Wishes Pushpinder Singh Garcha _________________________________ Web Architect