Serial key generator - random string with separators.

@tomasz_ek

If you don't have to have 5 slice of your string, you may use uuid.

https://laravel.com/docs/7.x/helpers#method-str-uuid

uuid is e little bit to long. I need something shorter as a key for new users which want to register. They can register only if they hava a key :D

probably less work to concatenate 4 x 4 letter strings

$code = sprintf('%s-%s-%s-%s', str::random(4), str::random(4), str::random(4), str::random(4));

Edit: (or 5! You get the idea)

I would probably make it all lowercase also

Thanks