Extending Laravel classes

There is a method called macro on a lot of built-in Laravel classes. For example Collection, Str, Arr, Request, Cache, File, and so on.

You can define your own methods on these classes like this:

1Str::macro('lowerSnake', function (string $str) {
2    return Str::lower(Str::snake($str));
3});
4 
5// Will return: "my-string"
6Str::lowerSnake('MyString');

Tip given by @mmartin_joo