What best practices should be followed when creating functions in PHP that interact with HTML elements?

When creating functions in PHP that interact with HTML elements, it is important to separate the PHP logic from the HTML presentation. This can be achieved by using PHP to generate dynamic content and then echoing it within the HTML structure. It is also recommended to use proper naming conventions for functions and variables to ensure clarity and maintainability of the code.

<?php
// Function to generate an HTML element with dynamic content
function generateElement($content) {
    return "<div>{$content}</div>";
}

// Example usage of the function
$content = "Hello, World!";
echo generateElement($content);
?>