method store() pada PostController.php

<?php

use Illuminate\Support\Facades\Validator;

class PostController extends Controller
{
    public function store(Request $request): RedirectResponse
    {
        $rules = [
            'title' => 'required|min:3|max:50',
            'text' => 'required|min:3|max:140',
        ];

        $messages = [
            'title.required' => 'Kolom judul harus diisi',
            'title.min' => 'Judul minimal mengandung :min karakter',
            'title.max' => 'Judul maksimal mengandung :max karakter',
            'text.required' => 'Kolom post harus diisi',
            'text.min' => 'Post minimal mengandung :min karakter',
            'text.max' => 'Post maksimal mengandung :max karakter',
        ];

        $validator = Validator::make($request->all(), $rules, $messages);

        if ($validator->fails()) {
            return redirect('/post/create')
                ->withErrors($validator)
                ->withInput($request->input());
        }

        $post = new Post;
        $post->title = $request->title;
        $post->text = $request->text;
        $post->save();

        return redirect('/post');
    }

}