In what scenarios is it recommended to use JavaScript and AJAX instead of PHP for real-time output on a web page?

JavaScript and AJAX are recommended over PHP for real-time output on a web page when you want to update specific parts of a webpage without reloading the entire page. This is useful for creating dynamic and interactive user interfaces. JavaScript and AJAX allow for asynchronous communication with the server, making it possible to fetch data in the background without disrupting the user experience.

// PHP code snippet for updating real-time output on a web page using JavaScript and AJAX