Take out the $headers variable from the function

Question

I have a problem when I want to fetch the $header variabel to get the header response

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_HTTPHEADER, $u);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false); 

curl_setopt($ch, CURLOPT_HEADERFUNCTION,

      function ($curl, $header) use (&$headers) {

        $len = strlen($header);

        $header = explode('Set-Cookie: ', $header, 2);

        if (count($header) < 2) // ignore invalid headers

            return $len;

        $headers[strtolower(trim($header[0]))][] = trim($header[1]);

        print_r($headers);

        return $len;

    });

I want to get the $headers variable out,and manipulate it