[ 'password' => 'password', 'email' => 'test@mailinator.com', ], ]; $username = empty($_POST['username']) ? '' : $_POST['username']; $password = empty($_POST['password']) ? '' : $_POST['password']; if (isset($users[$username]) && $users[$username]['password'] === $password) { $email = $users[$username]['email']; $forum = new Forum(); $forum->login($username, $email); $forum->redirectToForum(); } elseif (!empty($username) || !empty($password)) { echo 'Login failed'; }