How can PHP be used to check for changes in a database without reloading the entire page?

To check for changes in a database without reloading the entire page, you can use AJAX in combination with PHP. AJAX allows you to send asynchronous requests to the server and update specific parts of the page without refreshing it. You can create a PHP script that checks for changes in the database and returns the result to the client-side JavaScript code, which can then update the page accordingly.

<?php
// Your PHP script to check for changes in the database
// Connect to the database
$conn = new mysqli($servername, $username, $password, $dbname);

// Check for changes in the database
// For example, you can run a query to retrieve the latest data

// Return the result
echo json_encode($result);
?>