What are common errors associated with using session_start() in PHP on different servers?

Common errors associated with using session_start() in PHP on different servers include warnings about headers already being sent, session data not being saved or retrieved properly, and session variables not persisting between pages. To solve these issues, it's important to call session_start() at the beginning of every PHP script before any output is sent to the browser. Additionally, make sure the session.save_path in your php.ini file is set to a writable directory on the server.

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

// Your PHP code here
?>