Are there specific CSS attributes that should be used instead of inline styles in PHP-generated HTML output for better code organization and maintenance?

Using inline styles in PHP-generated HTML output can lead to messy and hard-to-maintain code. It is recommended to use external CSS files and apply classes or IDs to elements in the HTML output to style them. This approach separates the content from the presentation, making it easier to update styles across multiple pages and maintain a consistent design.

<?php
echo '<html>';
echo '<head>';
echo '<link rel="stylesheet" type="text/css" href="styles.css">';
echo '</head>';
echo '<body>';
echo '<div class="my-class">This is a styled div</div>';
echo '</body>';
echo '</html>';
?>