require ‘filename’ (PHP) - require - similar as 'Include'
The operator takes all the text/code/markup in the specified file and copies it to the file using the appropriate operator.
Example:
<div class="menu">
<?php require 'menu.php';?>
</div>
<h1>Welcome to my home page!</h1>
<p>Some text.</p>
<p>Some more text.</p>