How to get filp/whoops to work in Laravel 5.2 or 5.3 - Add this code to your `App\Exceptions\Handler.php` file.

App\Exceptions\Handler.php

/**
 * Create a Symfony response for the given exception.
 *
 * @param  \Exception  $e
 * @return mixed
 */
protected function convertExceptionToResponse(Exception $e)
{
    if (config('app.debug')) {
        $whoops = new \Whoops\Run;
        $whoops->pushHandler(new \Whoops\Handler\PrettyPageHandler);

        return response()->make(
            $whoops->handleException($e),
            method_exists($e, 'getStatusCode') ? $e->getStatusCode() : 500,
            method_exists($e, 'getHeaders') ? $e->getHeaders() : []
        );
    }

    return parent::convertExceptionToResponse($e);
}

Thanks Alex sir ! and I have a question . I have just update my old laravel 5.3 to 5.8 ... so does it work in same way as you said or not ?

Thanks, Sir!