Validate only alphanumeric characters in Laravel

Question

I have the following code in my Laravel 5 app:

public function store(Request $request){
    $this->validate($request,          


        

Answer 1

You forgot to quantify the regex, it also wasn't quite properly formed.

public function store(Request $request){
    $this->validate($request, ['filename' => 'regex:/^[a-zA-Z0-9_\-]*$/']);
}

This will accept empty filenames; if you want to accept non-empty only change the * to +.