What are the best practices for ensuring that session_start() is correctly implemented in PHP scripts for session management?

To ensure that session_start() is correctly implemented in PHP scripts for session management, it should be called at the beginning of every script that needs to access session variables. Additionally, it is important to set session variables securely, validate user input, and properly handle session data to prevent security vulnerabilities.

<?php
session_start();

// Your PHP code here
?>