What is the best practice for handling sessions in PHP, especially when using AJAX?

When handling sessions in PHP, especially when using AJAX, it's important to make sure that the session is properly initialized and maintained across multiple requests. One common approach is to start the session at the beginning of each PHP script that will be handling AJAX requests. This ensures that the session data is available throughout the user's session.

php

<?php
// Start the session
session_start();

// Your AJAX request handling code goes here
// For example, you can access session variables like $_SESSION['username']

// Make sure to close the PHP tag if no HTML follows
?>

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What is the best practice for handling sessions in PHP, especially when using AJAX?

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