Are there any recommended tutorials or manuals for PHP beginners focusing on session management and user authentication?

For beginners looking to learn about session management and user authentication in PHP, a recommended tutorial is the official PHP documentation on sessions (https://www.php.net/manual/en/book.session.php) and user authentication (https://www.php.net/manual/en/features.http-auth.php). Additionally, websites like W3Schools and tutorials on YouTube can provide step-by-step guides on implementing these features in PHP.

<?php
session_start();

// Check if the user is logged in
if(isset($_SESSION['loggedin']) && $_SESSION['loggedin'] === true) {
    echo 'Welcome back, ' . $_SESSION['username'] . '!';
} else {
    echo 'Please log in to access this page.';
}

// User authentication example
if($_POST['username'] === 'admin' && $_POST['password'] === 'password') {
    $_SESSION['loggedin'] = true;
    $_SESSION['username'] = $_POST['username'];
    echo 'You are now logged in as ' . $_SESSION['username'];
} else {
    echo 'Invalid username or password.';
}
?>