callmez\wechat\sdk\Wechat::getMedia PHP Method

    public function getMedia($mediaId)
    {
        $result = $this->httpGet(self::WECHAT_MEDIA_URL . 'access_token=' . $this->getAccessToken(), ['media_id' => $mediaId]);
        return !isset($result['errcode']) ? $result : false;
    }