How can CSS be used effectively to format PHP output for better readability?

To format PHP output for better readability using CSS, you can use CSS styles to control the appearance of the output. This can include setting font styles, colors, margins, padding, and more. By applying CSS to your PHP output, you can make the content more visually appealing and easier to read for users.

<?php
echo '<div style="font-family: Arial, sans-serif; color: #333; padding: 10px; margin: 10px; background-color: #f9f9f9;">';
echo 'Your PHP output content here';
echo '</div>';
?>