Экшн контроллера загрузчика изображений для серверов с поддержкой линкования

Сперва создадим маршут в файле routes/web.php

Routes::post('upload','CKEditorController@upload')->name('upload');

Далее создадим контроллер CKEditorController:

php artisan make:controller CKEditorController

Переходим в него, и добавляем экшн upload:

public function upload(Request $request)
    {
        if($request->hasFile('upload')) {
            if(!Auth::guest()){
                $puth_url = $_SERVER['DOCUMENT_ROOT'].'/storage/uploads/' . Auth::user()->id;
                if (!file_exists($puth_url)) {
                    mkdir($puth_url, 0777, true);
                }
            }else{

            }
            //get filename with extension
            $filenamewithextension = $request->file('upload')->getClientOriginalName();

            //get filename without extension
            $filename = pathinfo($filenamewithextension, PATHINFO_FILENAME);

            //get file extension
            $extension = $request->file('upload')->getClientOriginalExtension();

            //filename to store
            $filenametostore = $filename.'_'.time().'.'.$extension;

            //Upload File
            $request->file('upload')->storeAs('public/uploads/'.Auth::user()->id, $filenametostore);

            $CKEditorFuncNum = $request->input('CKEditorFuncNum');
            $url = asset('storage/uploads/'.Auth::user()->id.'/'.$filenametostore);
            $msg = 'Image successfully uploaded';
            $re = "<script>window.parent.CKEDITOR.tools.callFunction($CKEditorFuncNum, '$url', '$msg')</script>";

            // Render HTML output
            @header('Content-type: text/html; charset=utf-8');
            echo $re;
        }
    }