laravel-beginning/form-app-with-data/app/Http/Controllers/FormController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\File;
use Carbon\Carbon;

use App\Models\ContactMessage;

class FormController extends Controller
{
    private $path;

    public function __construct()
    {
        $this->path = storage_path('app/forms/contacts.json');
    }
    
    public function index() 
    {
        return view('form');
    }

    public function submit(Request $request)
    {
        $validated = $request->validate([
            'name' => 'required|string|min:3|max:15',
            'email' => 'required|email|max:50',
            'message' => 'required|string|min:10|max:100'
        ]);

        ContactMessage::create($validated);

        return redirect()->back()->with('success', 'Данные сохранены!');
    }

    public function showData() 
    {
        $submissions = ContactMessage::latest()->get();

        return view('admin', compact('submissions'));
    }
}