PHP

laravel abort with message

abort(403);

//You may also provide the exception's message and custom 
//HTTP response headers that should be sent to the browser:
abort(403, 'Unauthorized.', $headers);

abort_if()
//The abort_if function throws an HTTP exception if a given
//boolean expression evaluates to true:

abort_if(! Auth::user()->isAdmin(), 403);

laravel custom abort message

php artisan vendor:publish --tag=laravel-errors

update the error page file according to the code
@section('message', __($exception->getMessage() ?: 'Server Error'))