1. First you are going to need to take the first part of your code (whatever you put before the content of a specific page) and write that into notepad or whatever you use to edit your pages. Name that file "header.php"
ex. of header.php
<html> <head> <title> title </title> </head>
<body> (divs, tables, etc are positioned here...)
2. Take the closing tags, along with everything else you post after the content of a page and do the same thing. Name that file "footer.php"
ex. of footer.php
</body> </html>
3. Make a separate file for your stylesheet. Name it "style.css"
**What is a stylesheet? For now, let me direct you to this informative site**
Position the following code in your header like this:
<html><head> <LINK REL=stylesheet HREF="style.css" TYPE="text/css"> <title></title> </head>
4. Then for your other pages, simply put these codes around the content instead of the usual repeat of your layout code:
<? include("header.php"); ?>
<? include("footer.php"); ?>
Congratulations! You have just converted your site to php. This makes updating a LOT easier, since all you need to do is update your stylesheet and header/footer files! :)