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

    public function getMemberList($nextOpenId = null)
    {
        $nextOpenId === null && ($nextOpenId = ['next_openid' => $nextOpenId]);
        $result = $this->httpGet(self::WECHAT_MEMBER_GET_URL . 'access_token=' . $this->getAccessToken(), $nextOpenId);
        return !isset($result['errcode']) ? $result : false;
    }