public function getCard($card_id)
{
if (empty($card_id)) {
return false;
}
$result = $this->httpRaw(static::WECHAT_GET_CARD_URL . 'access_token=' . $this->getAccessToken(), Json::encode(['card_id' => $card_id]));
return isset($result['card']) ? $result['card'] : false;
}