When designing a web site the first thing you should think about is how easy do you want future edits to be..
Well with PHP you can speed up many processes that you may do countless times..
first thing is create a config.php
with a basic config file you can add many more types of fields.. then on top of every page you edit add this to the very first line in your code. before the html tags etc..!
$footer="Copyright 2007 Test Ltd";
Now anywhere you want to publish your variable do this
<?php include("config.php"); ?>
Dont forget all files must be PHP extensions.
<?php echo $companyname; ?>
I have found this method to save me a lot of time.. it can be used for anything and dont forget that any config.php cannot be opened in another page. if you navigate to this config file it will be blank! hiding your details!!
Its also a good idea to do includes for your menus etc.. so a simple include tag with the pure html or css to that menu no html needed in the include and you can change all pages with the same menu from one file.