How to parse a string into an array?

Question

PHP

there is a line some1[some2][some3]as a matter of fact it is name input. Available as a string. There is also some value.
It is necessary to parse and get an array

$ar = [
            'some1'=>[
                   'some2' => [
                            'some3' => 'некий value'

I can't figure out how to do it. Nesting is unknown.

Answer 1

parse_str