Incorrect decoded sender name in non-utf8 header From

[hwilok]

In the email header I get this:

From: =?koi8-r?B?4czFzsE=?= <test@email.com>

Im trying to retrive email sender using $message->getFrom() and get:

array:1 [
  0 => {#2957
    +"personal": b"áÌÅÎÁ"
    +"mailbox": "test"
    +"host": "email.com"
    +"mail": "test@email.com"
    +"full": b"áÌÅÎÁ <test@email.com>"
  }
]

I'm expected to get: "Алена"

Laravel-imap version: 1.4.3
Laravel: 5.8.35
Php: 7.1

[stridedot]

@hwilok
I also encountered this problem a few days ago. but I solved by this:

private function detectEncoding($str)
    {
        $pos = strpos($str, '=?');
        $search = substr($str, $pos + 2);

        $d1 = strpos($search, '?');
        //  Get charset character
        $charset = substr($str, $pos + 2, $d1);

        return $charset;
    }

private function getDecodedText($str)
    {
        $charset = $this->detectEncoding($str);

        switch (strtoupper($charset)) {
            case 'UTF-8':
                $decoded = @imap_utf8($str);
                break;
            default:
                $decoded = @iconv_mime_decode($str, 0, 'UTF-8');
                break;
        }

        // Still has string that has not been decoded
        if (strstr($decoded, '=?')) {
            $decoded = '';
            $arr = @imap_mime_header_decode($str);

            foreach ($arr as $obj) {
                $decoded .= $obj->text;
            }
        }

        return $decoded;
    }

hope to help you...