Are there any specific modules or plugins required to display PHP output in Joomla articles?

To display PHP output in Joomla articles, you can use the built-in "Custom HTML" module. Simply create a new Custom HTML module, add your PHP code within the module's content area, and then assign the module to the desired article position. This will allow you to execute PHP code and display its output within your Joomla articles.

<?php
// Your PHP code here
echo "Hello, Joomla!";
?>