Laravel null POST data in controller - laravel

Question

A few days ago I started to learn laravel on laracasts and I have a small problem.
When I submit a form data using post method and want to access this data in my controller, I have an empty value.
Form:
<form method="POST" action="{{ url('/costs')}}">
{{ csrf_field() }}
<div class="form-group">
<label for="cost-title">Cost title</label>
<input type="text" class="form-control" id="cost-title" name="title" placeholder="Enter cost title">
</div>
<div class="form-group">
<label for="cost-price">Price</label>
<input type="text" class="form-control" id="cost-price" name="price" placeholder="Enter price">
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
Controller:
<?php
namespace App\Http\Controllers;
use App\Cost;
class CostsController extends Controller
{
public function index(){
$costs = Cost::all();
return view('costs.index', compact('costs'));
}
public function show(Cost $cost){
return view('costs.show', compact('cost'));
}
public function create(Cost $cost){
return view('costs.create');
}
public function store(){
dd(request()->all);
}
}
In my routes I'm triggering #store using post method:
Route::get('/costs', 'CostsController#index');
Route::get('/cost/{cost}', 'CostsController#show');
Route::get('/costs/create', 'CostsController#create');
Route::post('/costs', 'CostsController#store');
And when I try to dump and die the requests:
public function store(){
dd(request()->all);
}
I have a null value. Can you please explain me why I can't see any data here?

Answer 1

Update your store method and pass a Request parameter like this:
public function store (Request $request)
{
$input = $request->all();
dd($input);
}
Update:
The Illuminate\Http\Request
instance provides a variety of methods for examining the HTTP request for your application and extends the
Symfony\Component\HttpFoundation\Request
If your controller method is also expecting input from a route parameter you should list your route parameters after your other dependencies. For example, if your route is defined like so:
Route::put('user/{id}', 'UserController#update');
You may still type-hint the Illuminate\Http\Request and access your route parameter id by defining your controller method as follows:
public function update(Request $request, $id)
{
//
}
So, in simple words for getting form parameters you have to pass a variable ($request) to your controller so that it can be accessible (lets just say that laravel store these form parameters in the $request variable, so you can easily pass it to controller or not).
Hope it will clear up things :)