Answered by : d3signa

<form method="POST" action="{{route('back.post.new')}}" enctype="multipart/form-data">
.............
</form>

Source : https://stackoverflow.com/questions/38226875/laravel-request-file-returns-null | Last Update : Sat, 26 Jun 21

Answered by : alex-e

use Symfony\Component\HttpFoundation\File\UploadedFile;

Source : https://laracasts.com/discuss/channels/laravel/file-upload-always-comes-up-as-empty-when-accessed-in-controller-1 | Last Update : Sat, 20 Aug 22