I'm using PHP includes and CSS for my website. Rather then having to change the directory of ever include and CSS location on each page, I would like to only change one line.

Heres what I want to change:

<link rel="stylesheet" type="text/css" href="<?=$location?>web.css" />
<?php include("<?=$location?>header.php"); ?>
<?php include("<?=$location?>footer.php"); ?>

Where $location equals something like "../../".

Obviously you can use PHP inside of PHP. Is there another way to do this?

How about setting a URI relative to the site root.

Say your root folder is "public_html" as is fairly common. Inside that directory is your main index file, then perhaps other folders etc. Generally, I keep my css in a folder called "css" within "public_html" (at the root).

<link rel="stylesheet" type="text/css" href="/css/web.css" />

Starting your href with "/" starts it looking in the root directory.