What are common reasons for PHP sessions not working on localhost?

Common reasons for PHP sessions not working on localhost include incorrect session configuration, missing session_start() function, or issues with session save path permissions. To solve this issue, make sure to properly configure the session settings in php.ini, include session_start() at the beginning of your PHP files, and ensure that the session save path is writable.

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

// Your PHP code here
?>