Hi
You could use a function like the following (from Welling and Thomson's PHP and MySQL Web Development):
function display_header($title)
// prints the head section of a webpage
{
?>
<head>
<title><?=$title?></title>
</head>
<body>
<?
if($title)
display_heading($title);
}
Then, on each page, call it as follows:
display_header("Title for this page");
The piece in brackets will become the title of the page. You could also fiddle about with this to do the meta-tags etc.
HTH
Kevin