How to parse a site if two encodings iso-8859-1 and utf-8 are specified?

Question

Parsing

I load the page via curl (I also tried it via file_get_contents), I didn’t change the encodings either via iconv or via mb_detect_encoding and tried to connect libraries, nothing happens.
Here are the two tags indicated in the header?
meta http-equiv="content-type" content="text/html; charset=iso-8859-1"
meta http-equiv="Content-Type" content="text/html; charset=utf-8"

Answer 1

maybe this will help?
https://habrahabr.ru/post/107945/

Answer 2

Here the site dsh.kurganobl.ru
gives ������
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