Are there any specific considerations to keep in mind when combining PHP and JavaScript for dynamic content?

When combining PHP and JavaScript for dynamic content, it's important to remember that PHP is a server-side language while JavaScript is a client-side language. This means that PHP code is executed on the server before the page is loaded, while JavaScript code is executed on the client's browser after the page is loaded. To ensure smooth interaction between the two, you can use AJAX to make asynchronous requests to the server from JavaScript to fetch dynamic data without reloading the entire page.

<?php
// PHP code to fetch dynamic data
$data = array("name" => "John", "age" => 30);
echo json_encode($data);
?>