How can PHP beginners avoid using outdated HTML tags like <font> and <center> for styling?

Using CSS for styling is the modern way to style HTML elements, rather than relying on outdated HTML tags like <font> and <center>. PHP beginners can avoid using these tags by creating a separate CSS file and linking it to their PHP files using the <link> tag in the <head> section of their HTML document.

&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;link rel=&quot;stylesheet&quot; type=&quot;text/css&quot; href=&quot;styles.css&quot;&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;div class=&quot;styled-div&quot;&gt;
        &lt;p&gt;This is a paragraph styled using CSS.&lt;/p&gt;
    &lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
```

styles.css:
```css
.styled-div {
    text-align: center;
    font-family: Arial, sans-serif;
    font-size: 16px;
    color: #333;
}