What are the best practices for using CSS to control the size and position of content within a PHP script?

To control the size and position of content within a PHP script using CSS, it is best practice to separate the styling from the PHP logic. This can be achieved by embedding CSS styles directly within the PHP script using the `<style>` tag or by linking an external CSS file. By applying CSS rules to the HTML elements generated by the PHP script, you can easily control the size and position of the content.

&lt;?php
// PHP logic to generate content
echo &quot;&lt;div style=&#039;width: 50%; margin: 0 auto;&#039;&gt;Content here&lt;/div&gt;&quot;;
?&gt;