How can multiple head, body, and html tags affect the functionality of JavaScript on different pages in a PHP application?

Having multiple head, body, and html tags on different pages in a PHP application can cause JavaScript functionality to break or behave unexpectedly. To solve this issue, make sure that each page has only one set of head, body, and html tags. This ensures that JavaScript code is properly loaded and executed without conflicts.

<!DOCTYPE html>
<html>
<head>
    <title>Your Page Title</title>
    <script src="your-script.js"></script>
</head>
<body>
    <!-- Your page content here -->
</body>
</html>