Laravel по-русски

        if( $request->isMethod('post') ) {  
            ......
            dd( $request->all() ); //NOTHING!!!

            //Validate
            ......
            return redirect()->route('home')
                ->withErrors($validator)->withInput($request->all()); 
        }

        dd( $request->all() ); //NOTHING!!! - вернее возвращается [] - т.е. пустой объект
        if( $request->isMethod('post') ) {  
            ......
            dd( $request->all() ); //NOTHING!!!

            //Validate
            ......
            return redirect()->route('home')
                ->withErrors($validator)->withInput($request->all()); 
        }

Route::get('/contact_form/{prm?}', ['uses'=>'Admin\ContactformController@show_form_get'])->name('contact_form');

Route::post('/contact_form', ['uses'=>'Admin\ContactformController@show_form_post']);

<?php
namespace App\Http\Requests;
use App\Http\Requests\Request;

class ContactRequest extends Request
{

    public function authorize()
    {
        return true;  //false.
    }

 
    public function rules()
    {
        return [
            'name' => 'required|max:10',
            //'name' => 'exists:users,name',
            'email' => 'required|email',
            'site'=>'required',
        ];
    }

}  //__/class ContactRequest

<?php
namespace App\Http\Controllers\Admin;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Requests\ContactRequest;   //свой Класс `ContactRequest` с правилами валидации
use App\Http\Controllers\Controller;
use \Illuminate\Support\Facades\Validator;

class ContactformController extends Controller {

    public $show_controller_method = array(__METHOD__);
    //__________________________________________________________________________________________________________________

    /** Method handler http-request with GET
    */
    public function show_form_get( ){

        $this->show_controller_method[] = 'showform()';
        if( view()->exists('default.contact_form') ){
            return view('default.contact_form')->withInfoMethodController($this->show_controller_method);
        }
        else { abort(404); }

    }  //__/public function show_form_get()


    /** Method handler http-request with POST
    */
    public function show_form_post( ContactRequest $request ){

        /** VALIDATION on Request */
        if( $request->isMethod('post') ):
            dump( $request->all() );
        endif; //__/if( $request->isMethod('post') )

        $this->show_controller_method[] = 'showform()';
        if( view()->exists('default.contact_form') ){
            return view('default.contact_form')->withInfoMethodController($this->show_controller_method);
        }
        else { abort(404); }

    }

} //__/class ContactformController

value="{{ old('name') }}"  value="{{ old('email') }}"  и т.д. ...

@if( count($errors) > 0 )
    <div class="alert alert-danger">
        <ul>
            @foreach( $errors->all() as $error ) <li>{{ $error }}</li> @endforeach
        </ul>
    </div>
@endif

 $this->validate($request, $rules)
dump( $request->all() );

/** VALIDATION on Request */
        if( $request->isMethod('post') ):

            $rules = [
                'name' => 'required|max:10', 
                'email' => 'required|email',
                'site'=>'required',
            ];
            $messages = [
                'required' => 'The :attribute field is required.',
            ];

            $validator = \Validator::make($request->all(), $rules);
            if( $validator->fails() ) {
                $request->flash();
                return view('default.contact')
                    ->withMydata($my_array2)
                    ->withMydata2($my_array)
                    ->withMydata3($my_array3)
                    ->withTitlecontactpage($title_contact_page)
                    ->withInfoMethodController($this->show_controller_method)
                    ->withErrors($validator)
                    ->withInput( $request->all() );
            }
            dump( $request->all() );

        endif;

namespace App\Http\Controllers\Admin;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;
//use Illuminate\Validation\Validator;
use Validator;

class ContactController extends Controller {

    public function show( Request $request, $prm=false){ 

        $my_array = ['title1'=>'This variable `$title1` content', 'title2'=>'This variable `$title2` content', 'title3'=>'This variable `$title3` content']; //массив
        $my_array2 = ['one'=>array('param1'=>'This variable `param1` content', 'param2'=>'This variable `param2` content', 'param3'=>'This variable `param3` content'),
            'two'=>array('param4'=>'This variabl e `param4` content', 'param5'=>'This variable `param5` content', 'param6'=>'This variable `param6` content')
        ];  //двумерный Массив

        $my_array3 = array(
            'title'=>'Contact',
            'data'=>[ 'one'=>'list 1',
                'two'=>'list 2',
                'three'=>'list 3',
                'four'=>'list 4',
                'five'=>'list 5',
            ],
            'dataI'=>['list-1','list-2','list-3','list-4','list-6','list-6'],
            'bvar'=>true,
            'script'=>"<script>alert('Hello! ++')</script>"
        );

        /** VALIDATION on Request */
        if( $request->isMethod('post') ) {

            $rules = [
                //'name' => 'bail|required|max:10',
                'name' => 'exists:users,name',
                //'email' => 'required|email',
                //'site'=>'required',
                //'text_area'=>'required',
            ];
            $messages = [
                'required' => 'The :attribute field is required.',
            ];

           /*
            $this->validate($request, $rules, $messages);
                dump( $request->all() );
                dump( $request->session()->all() );
            */

                                    $validator = Validator::make($request->all(), $rules, $messages);
                                    if ($validator->fails()) {
                                        return back()->withErrors($validator)->withInput();
                                    }
                                    dump( $request->all() );
        }


        $title_contact_page = 'Contact';
        $this->show_controller_method[] = 'show()';
        if( view()->exists('default.contact') ){
            return view('default.contact')
                ->withMydata($my_array2)
                ->withMydata2($my_array)
                ->withMydata3($my_array3)
                ->withTitlecontactpage($title_contact_page);
        }
        else { abort(404); }

    }

}

        @if( count($errors) > 0 )
            <div class="alert alert-danger">
                <ul>
                    @foreach( $errors->all() as $error ) <li>{{ $error }}</li> @endforeach
                </ul>
            </div>
        @endif

        <form method="POST" action="{{  route('contact') }}">
            ..........
            ..........

$validator = Validator::make($request->all(), $rules, $messages);
if ($validator->fails()) {
   return back()->withErrors($valitor)->withInput();
}

use Illuminate\Validation\Validator;

FatalErrorException in ContactController.php line 64:
Call to undefined method Illuminate\Validation\Validator::make()