Including a file
From Conservapedia
Including a file in source code is a very common practice, especially in web page design. However, there are so many ways to do this, that it can be hard for the beginner to keep track.
Contents
CSS in HTML
<link rel="stylesheet" type="text/css" href="class.css" />[1]
Javascript in HTML
<script src="myscript.js"></script>
PHP
include 'NiceScript.php';
include 'anything.html';