Is it considered good practice to include PHP code within HTML tags or should they be kept separate?

It is generally considered good practice to keep PHP code separate from HTML tags for better readability, maintainability, and separation of concerns. This makes it easier to identify and debug issues in the code. To achieve this separation, you can use PHP opening and closing tags within the HTML code where necessary.

<!-- HTML code -->
<div>
    <p><?php echo "Hello, World!"; ?></p>
</div>