How do I use PHP includes in my Web pages?

PHP Includes allow you to easily reuse specific sections of code and content throughout your site. For example, many sites have a footer section where they display additional navigation links, ads, etc. Without PHP Includes (or other server side programming language), a developer would need to write the same code for this footer into each and every page of their site. Manually coding every page with the same identical content is a serious hassle and can make maintenance a nightmare. In comes PHP includes.

A basic include statement is written like this:<?php include ( 'directory/filename.php' ); ?>

Pretty simple. Now, let’s say you want the links listed below to be displayed as the footer in several pages of your site:
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