Where can one find resources for CSS formatting of PHP output?

When outputting PHP data to a webpage, you can use CSS to style the content and make it visually appealing. To do this, you can either include CSS styles directly in the PHP file using the <style> tag, or link to an external CSS file. By applying CSS formatting to PHP output, you can control the appearance of text, images, and other elements on your webpage.

&lt;?php
echo &#039;&lt;div style=&quot;color: red; font-size: 20px;&quot;&gt;Hello, World!&lt;/div&gt;&#039;;
?&gt;