how can i use setOpion() and getOption() method in laravel?

i am trying to first set in controller setOption(value, valuename) in controller and store in database and use it as getOption in views

but not working .

Here is my controller =>

  public function update(Request $request)
{
    setOption('company_name', $request->input('company_name'));
}

But not working

error =>

"Call to undefined function App\Http\Controllers\Admin\setOption()"

anybody got idea how do i use it ?

via Chebli Mohamed