What are some best practices for styling and controlling the size of embedded content when using include in PHP?

When including content from external files in PHP using the include function, it's important to consider styling and controlling the size of the embedded content. One way to achieve this is by wrapping the included content in a container div with specific styling properties, such as setting a fixed width or height. This allows you to control the size and appearance of the embedded content within your webpage.

<div style="width: 300px; height: 200px; overflow: auto;">
    <?php include 'external_content.php'; ?>
</div>