How can PHP developers efficiently handle sessions on every page without repeating the session_start() command?

PHP developers can efficiently handle sessions on every page without repeating the session_start() command by using a common include file that is included on every page. This file can contain the session_start() command, ensuring that sessions are started on every page without the need to repeat the command in each individual file.

// session_start.php

session_start();

// index.php

include('session_start.php');

// other_page.php

include('session_start.php');