ldc-mesbr-app/app/Traits/ThanksTrait.php

<?php

namespace App\Traits;

use Illuminate\Http\Request;

trait ThanksTrait
{
    public function getThanks(Request $request)
    {
        if ($request->session()->has('campagne')) {
            $campagne = $request->session()->get('campagne');
        }

        if ($request->session()->has('contact')) {
            $contact = $request->session()->get('contact');
        }

        $ref = $campagne->camp_id;

        $view = view('landings::' . $ref . '.merci')
                    ->with(['ref' => $ref, 'contact' => $contact]);

        echo($view);
    }
}