SESSION in laravel for page protection - php

Question

I want to make a Login Registration system in laravel 8. In which User when login only can access a particular page else redirect to login page. I did this like that. what's wrong in it.
//Login Code
function login(Request $req){
$results = DB::table('crud_users')
->where('email', '=', $req -> post('email'))
->where('password', '=', $req -> post('password'))
->get();
foreach ($results as $value) {
$value ->email;
$value ->password;
$name = $value ->name;
$user_type = $value ->user_type;
echo $id = $value ->id;
session()->put('id', $id);
session()->put('name', $name);
}
$req -> validate([
'email' => 'required',
'password' => 'required',
]);
$email = $req -> input('email');
$password = $req -> input('password');
if ($user_type == 'admin') {
if (($email == $value ->email) && ($password == $value->password)) {
return redirect('admin');
}
} else if($user_type == 'user') {
if (($email == $value ->email) && ($password == $value->password)) {
return redirect('user');
} else{
return redirect('login');
}
// session()->flash('success','You are registered! Please login!');
// return redirect('login');
}
}
//Session Code
if (session()->has('id')) {
Route::get('logout','App\Http\Controllers\User#logout');
Route::view('user','user');
Route::view('admin','admin');
Route::view('edit/{id}','edit/{id}');
}else{
Route::get('/', function () {
return view('welcome');
});

Answer 1

you can use the default authentication in laravel8 using laravel application Jetstream starter kit and use the auth() middleware to go to a particular page.
you can see this [blog]1
or see the laravel's documentation from [here]2
for your code you're i think you're call session by this way session() it's wrong you should call the session class or use this way like this $request->session()->has('id')
or
Session::has('id')

Answer 2

I always use like following code
Session::put('id',$id);
Session::put('name',$name);
And in your conditional value you have to use like
if(Session::get('id')!=''){
Route::get('logout','App\Http\Controllers\User#logout');
...
}
else{
return redirect('/');
}

Answer 3

you can use auth() middleware for login authentication.
for more info https://laravel.com/docs/7.x/authentication