Why is it important to avoid using obsoleted HTML tags like <font> when highlighting text in PHP?

Using obsoleted HTML tags like <font> is not recommended because they are no longer supported in modern web development practices. It is better to use CSS for styling and formatting text in PHP to ensure better compatibility across different browsers and devices. By using CSS, you can easily customize the appearance of text without relying on outdated HTML tags.

echo '<p style="color: blue; font-size: 16px;">This is a highlighted text using CSS</p>';