How can PHP beginners differentiate between PHP and HTML functionalities when working with iframes for web development projects?

When working with iframes in web development projects, PHP beginners can differentiate between PHP and HTML functionalities by understanding that PHP is a server-side language used for dynamic content generation, while HTML is a markup language used for structuring web pages. To ensure that PHP functionalities are correctly implemented within iframes, developers should use PHP code within the iframe source attribute to dynamically generate content.

<iframe src="<?php echo 'dynamic_content.php'; ?>"></iframe>