GuzzleHttp\Exception\RequestException

cURL error 60: SSL certificate problem: certificate has expired (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://secure.geonames.org/countryInfoJSON?lang=ru&username=books_bvks

    /**
     * Convert Parameters Array to a Query String.
     *
     * Escapes values according to RFC 1738.
     *
     * @see http://forum.geonames.org/gforum/posts/list/8.page
     * @see rawurlencode()
     *
     * @param array $params Associative array of query parameters.
     *
     * @return string The query string.
     */
    protected function paramsToQueryString(array $params = []): string
    {
        $arrayIsAssoc = function (array $array) {
            return count(array_filter(array_keys($array), 'is_string')) > 0;
        };

        $query_string = [];
        foreach ($params as $name => $value) {
            if (empty($name)) {
                continue;
            }
            if (is_array($value)) {
                // recursion case

                if ($arrayIsAssoc($value)) {
                    $result_string = $this->paramsToQueryString($value);

                    if (!empty($result_string)) {
                        $query_string[] = $result_string;
                    }
                } else {
                    foreach ($value as $subValue) {
                        $result_string = $this->paramsToQueryString([$name => $subValue]);

                        if (!empty($result_string)) {
                            $query_string[] = $result_string;
                        }
                    }
                }

                $result_string = $this->paramsToQueryString($value);
                if (!empty($result_string)) {
                    $query_string[] = $result_string;
                }
            } else {
                // base case

                $value = (string)$value;
                $query_string[] = $name . '=' . rawurlencode($value);
            }
        }

        return implode('&', $query_string);
    }