What are the best practices for ensuring the stability and reliability of a PHP-based router login system?

Issue: To ensure the stability and reliability of a PHP-based router login system, it is important to implement proper security measures such as input validation, password hashing, and session management. 

// PHP code snippet for implementing secure login system

// Validate user input
$username = filter_var($_POST['username'], FILTER_SANITIZE_STRING);
$password = filter_var($_POST['password'], FILTER_SANITIZE_STRING);

// Hash the password
$hashed_password = password_hash($password, PASSWORD_DEFAULT);

// Verify user credentials
if ($username === 'admin' && password_verify($password, $hashed_password)) {
    // Start a session and set user as logged in
    session_start();
    $_SESSION['logged_in'] = true;
    // Redirect to router dashboard
    header('Location: router_dashboard.php');
    exit;
} else {
    // Display error message
    echo 'Invalid username or password';
}

Keywords

authentication security error handling session management input validation

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