What are the potential compatibility issues when using PHP to load specific content on a webpage?

One potential compatibility issue when using PHP to load specific content on a webpage is ensuring that the PHP code is properly executed on the server-side before the webpage is rendered in the browser. This can be achieved by making sure that the server supports PHP and that the file extension is .php. Additionally, it's important to handle errors gracefully to prevent any issues with loading content.

<?php
// Ensure the server supports PHP and the file extension is .php
// Handle errors gracefully to prevent issues with loading content
?>