Does Gulp need a signal when a task is completed?

Question

gulp.js

Hello, I started learning gulp.
In some sources, they write that the task must be completed with a callback, as one of the options.
In other sources, there is no word about the termination signal.
Everything works for me without callbacks.
How to proceed?
I suspect the 2nd source is more relevant.

Answer 1

Mmm... Now I would like to guess links to sources =)
Callbacks are optional. Your sources don't lie.

Answer 2

$url = '/lol/kuh/regeditom/pendol/';
$arr=expode('/', $url);

but if you want it with a regular expression, then something like this

preg_match_all('#([^/]+)#',$url,$match);
print_r($match);

Answer 3

https://regex101.com/r/c8Alqv/1