Class 'App\Http\Controllers\Exception' not found code example

Example 1: Class 'App\Http\Controllers\Validator' not found

use Illuminate\Support\Facades\Validator;

Example 2: Class 'App\Http\Controllers\Response' not found

use Response;
Or use full namespace:

return \Response::json(...);
Or just use helper:

return response()->json(...);

Example 3: Class 'App\Http\Controllers\File' not found

// in laravel append the following at the top of controller
use File;

Example 4: Class 'App\Http\Controllers\Auth' not found

Because your controller is namespaced unless you specifically import the Auth namespace, PHP will assume it's under the namespace of the class, giving this error.

To fix this, add use Auth; at the top of AdminHomeController file along with your other use statements or alternatively prefix all instances of Auth with backslash like this: \Auth to let PHP know to load it from the global namespace.

Example 5: Class 'App\Http\Controllers\Validator' not found

public function store()
    {
        $rules = array(
            'name'    => 'required',
        );

        $validator = Validator::make(Input::all(), $rules);

        // if the validator fails, redirect back to the form
        if ($validator->fails()) {
            return Redirect::back()
                ->withErrors($validator) // send back all errors to the login form
                ->withInput();

            $input = input::all();

        } else {

            $company                = New Company();
            $company->name          = Input::get('name');
            $company->user_id       = Input::get('user_id');
            $company->country_id    = Input::get('country_id');
            $company->description   = Input::get('description');

            $company->save();

            return Redirect::to('/backend')->withInput()->with('success', Company added.');

        }
    }