flash() public static method

Flash the input for the current request to the session.
public static flash ( string $filter = null, array $keys = [] ) : void
$filter string
$keys array
return void
 public function postStore()
 {
     $input = \Input::all();
     if ($input['parent_id']) {
         $parentApplication = \Application::find($input['parent_id']);
     } else {
         $parentApplication = $this->application;
     }
     $validation = \Validator::make($input, \Application::$rules);
     // dd($input);
     if ($validation->passes()) {
         $newApp = new \Application();
         $newApp->name = $input['name'];
         $newApp->user_id = \Auth::user()->id;
         //$newApp->parent_id = $parentApplication->id;
         $newApp->cms_package = $parentApplication->cms_package;
         $parentApplication->children()->save($newApp);
         //TODO: Fix baum here - not saving correctly
         \Application::rebuild();
         //we need to do the urls..
         $domains = explode(',', $input['domain']);
         $appUrls = [];
         foreach ($domains as $domain) {
             $appUrl = new \ApplicationUrl();
             $appUrl->domain = $domain;
             $appUrl->folder = '/';
             //TODO: folders - is this ever going to work?
             $appUrls[] = $appUrl;
         }
         $newApp->url()->saveMany($appUrls);
         //and the plugins
         $parentPlugins = $parentApplication->plugins()->get();
         foreach ($parentPlugins as $parentPlugin) {
             $newApp->plugins()->attach($parentPlugin->id);
             //associate($parentPlugin)
         }
         return redirect()->action('\\Bootleg\\Cms\\ApplicationController@anyIndex')->with(['success' => 'Application Succesfully Created']);
     }
     \Request::flash();
     return redirect()->back()->withErrors($validation->errors());
 }