How can the use of session_start() function in PHP impact the functionality of the login system in the provided code?

The session_start() function is essential for managing sessions in PHP, especially for login systems. Without session_start(), the login system won't be able to store and retrieve session variables like user login status. Therefore, it is crucial to include session_start() at the beginning of the code to ensure proper functionality of the login system. 

<?php
session_start();

// Rest of the login system code goes here
?>

Keywords

session_start login system functionality PHP code

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