Chargify::getSubscription PHP Method

    public function getSubscription($subscriptionId)
    {
        $r = $this->sendRequest("/subscriptions/{$subscriptionId}.json", 'GET');
        if ($r->getResponseCode() == 200) {
            return json_decode($r->getBody()->toString(), true);
        } else {
            if ($r->getResponseCode() == 422) {
                $response = json_decode($r->getBody()->toString(), true);
                throw new Exception($response['errors'][0]);
            }
            throw new Exception("Cannot get subscription info. Response code: " . $r->getResponseCode() . ". Response body: " . $r->getBody()->toString());
        }
    }