如何封装一个可以接收多个参数的方法？

如何封装一个可以接收多个参数的方法而且参数位置可变？

1. 定义个基类，
2. 写一个类继承基类，其中定义一些基础必备参数
3. 哪里需要调用就各自定义需要的参数即可

<?php
/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2017/5/26
 * Time: 11:32
 */

namespace luweiss\wechat;


abstract class Base
{
    /**
     * 微信组件
     *
     * @var Wechat
     */
    protected $wechat;

    /**
     * @param Wechat $wechat
     */
    public function __construct($wechat)
    {
        $this->wechat = $wechat;
    }
}

<?php
/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2017/5/26
 * Time: 10:18
 */

namespace luweiss\wechat;


class Pay extends Base
{

    /**
     * 统一下单
     * @param array $args [
     *
     * 'body' => '商品描述',
     *
     * 'detail' => '商品详情，选填',
     *
     * 'attach' => '附加数据，选填',
     *
     * 'out_trade_no' => '商户订单号，最大长度32',
     *
     * 'total_fee' => '订单总金额，单位为分',
     *
     * 'notify_url' => '异步接收微信支付结果通知的回调地址，通知url必须为外网可访问的url，不能携带参数',
     *
     * 'trade_type' => '交易类型，可选值：JSAPI，NATIVE，APP',
     *
     * 'product_id' => '商品ID，trade_type=NATIVE时，此参数必传',
     *
     * 'openid' => '用户标识，trade_type=JSAPI时，此参数必传',
     *
     * ]
     *
     * @return array|boolean
     *
     */
    public function unifiedOrder($args)
    {
        $args['appid'] = $this->wechat->mchAppId;
        $args['sub_appid'] = $this->wechat->appId;
        $args['sub_mch_id'] = (int)$this->wechat->subMchId;
        $args['mch_id'] = $this->wechat->mchId;
        $args['profit_sharing'] = $this->wechat->profitSharing;//是否使用分账；Y是 N否
        $args['nonce_str'] = md5(uniqid());
        $args['sign_type'] = 'MD5';
        $args['spbill_create_ip'] = '127.0.0.1';
        $args['sign'] = $this->makeSign($args);
        $xml = DataTransform::arrayToXml($args);
        $api = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        $this->wechat->curl->post($api, $xml);
        if (!$this->wechat->curl->response)
            return false;
        return DataTransform::xmlToArray($this->wechat->curl->response);
    }
}

调用：自己需要啥参数就自定义传参数

 //单个订单微信支付下单
    private function unifiedOrder($goods_names)
    {
        $this->wechat = $this->getWechat();
        $res = $this->wechat->pay->unifiedOrder([
            'body' => $goods_names,
            'out_trade_no' => $this->order->order_no,
            'total_fee' => $this->order->pay_price * 100,
            'notify_url' => pay_notify_url('/pay-notify.php'),
            'trade_type' => 'JSAPI',
            'sub_openid' => $this->user->wechat_open_id,
        ]);

        if (!$res) {
            return [
                'code' => 1,
                'msg' => '支付失败',
            ];
        }
        if ($res['return_code'] != 'SUCCESS') {
            return [
                'code' => 1,
                'msg' => '支付失败，' . (isset($res['return_msg']) ? $res['return_msg'] : ''),
                'res' => $res,
            ];
        }
        if ($res['result_code'] != 'SUCCESS') {
            if ($res['err_code'] == 'INVALID_REQUEST') { //商户订单号重复
                $this->order->order_no = (new OrderSubmitForm())->getOrderNo();
                $this->order->save();
                return $this->unifiedOrder($goods_names);
            } else {
                return [
                    'code' => 1,
                    'msg' => '支付失败，' . (isset($res['err_code_des']) ? $res['err_code_des'] : ''),
                    'res' => $res,
                ];
            }
        }
        return $res;
    }