What is the function of session_start() in PHP and why is it important for session management?

The session_start() function in PHP is used to initialize a new session or resume an existing session. It is important for session management as it allows PHP to track and store session data for a particular user across multiple pages on a website. Without session_start(), PHP will not be able to store session data and maintain user-specific information. 

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

// Now you can set session variables
$_SESSION['user_id'] = 12345;
$_SESSION['username'] = 'john_doe';
?>

Keywords

session_start PHP session management session variables security

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