How can PHP beginners effectively use the include function to integrate a forum into their website?

To integrate a forum into a website using the include function in PHP, beginners can create a separate PHP file for the forum code and then include it in their main website file. This allows for easy management and updates of the forum code without affecting the rest of the website.

//forum.php
//Forum code goes here

//index.php
include 'forum.php';
//Rest of the website code