What are the implications of relying solely on CSS for animations and interactions in PHP-driven web projects?

Relying solely on CSS for animations and interactions in PHP-driven web projects can limit the dynamic nature of the website and may not provide the level of interactivity required. To enhance user experience and functionality, incorporating JavaScript alongside CSS is recommended.

<?php
// PHP code snippet integrating JavaScript for animations and interactions
echo '<script>
// JavaScript code for animations and interactions
</script>';
?>