What are the potential pitfalls of relying solely on PHP for dynamic user interactions on a webpage?

Potential pitfalls of relying solely on PHP for dynamic user interactions on a webpage include slower page loading times due to server-side processing, limited interactivity without page refreshes, and increased server load. To mitigate these issues, you can incorporate client-side scripting languages like JavaScript to handle dynamic user interactions.

// Example of using JavaScript alongside PHP to handle dynamic user interactions
echo '<script>
function handleUserInteraction() {
  // JavaScript code to handle dynamic user interactions
}
</script>';