微信支付退款php

<?php
// +----------------------------------------------------------------------
// | ITUX.CN [ ITUX.CN软件定制开发 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2014~2023 https://itux.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed 此软件并不是自由软件,未经许可不能去掉ITUX相关版权
// +----------------------------------------------------------------------
// | Author: 13103895694 <itholiday@126.com>
// +----------------------------------------------------------------------
//微信企业付款接口sdk
namespace addons\gaga\library\cqrs\libs;
use think\Db;

class WxpayRefund
{
    private $_appid;
    private $_merchantid;
    private $_key;
    private $apiclient_cert;
    private $apiclient_key;

    public function __construct($config)
    {
        $this->_appid = $config['app_id'];
        $this->_merchantid = $config['mch_id'];
        $this->_key = $config['api_key'];
        $this->apiclient_cert = ROOT_PATH . 'public' . DS . $config['apiclient_cert'];
        $this->apiclient_key = ROOT_PATH . 'public' . DS . $config['apiclient_key'];
    }

    public function batchRechargeRefund($refund_id, $uid, $refund_money, $money, $loop = 0)
    {
        static $return_data = [];
        if ($money <= 0) return $return_data;
        $money = bcadd($money, 0, 2);
        $refund_no = $refund_id . '_' . $loop;
        $lastOrder = Db::name('vip_recharge_log')->whereIn('refund_status', [0, 1])->where('user_id', $uid)->where('status', 1)->where('app_id', $this->_appid)->order('pay_money desc,refund_money asc')->limit(1)->find();
        if (empty($lastOrder)) {
            return $return_data;
        }
        $remain = bcsub($lastOrder['pay_money'], $lastOrder['refund_money'], 2);
        $now_refund = $remain >= $money ? $money : $remain;
        $order_refund_money = bcadd($lastOrder['refund_money'], $now_refund, 2);
        $order_refund_status = $order_refund_money >= $lastOrder['pay_money'] ? 2 : 1;
        $result = $this->doRefund(floatval($lastOrder['pay_money']), floatval($now_refund), $refund_no, "", $lastOrder['order_sn'], "预计退款{$refund_money}元[此单已退{$now_refund}元]");
        $res = json_decode(json_encode($result), true);
        if (!empty($res) && $res['return_code'] == "SUCCESS" && $res['result_code'] == "SUCCESS") {
            $tmp_refund_id = $lastOrder['refund_id'] ? $refund_no : ($lastOrder['refund_id'] . '|' . $refund_no);
            Db::name('vip_recharge_log')->where('id', $lastOrder['id'])->update(['refund_status' => $order_refund_status, 'refund_money' => $order_refund_money, 'refund_id' => $tmp_refund_id]);
            $money = bcsub($money, $now_refund, 2);
            $loop++;
            $return_data[] = ['id' => $lastOrder['id'], 'now_refund' => $now_refund, 'refund_no' => $refund_no];
        }
        if ($money <= 0) return $return_data;
        return $this->batchRechargeRefund($refund_id, $uid, $refund_money, $money, $loop);
    }

    /**
     * 退款
     * @param float $totalFee 订单金额 单位元
     * @param float $refundFee 退款金额 单位元
     * @param string $refundNo 退款单号
     * @param string $wxOrderNo 微信订单号
     * @param string $orderNo 商户订单号
     * @return string
     */
    public function doRefund($totalFee, $refundFee, $refundNo, $wxOrderNo = '', $orderNo = '', $desc = "", $notify_url = "")
    {
        $unified = array(
            'appid' => $this->_appid,
            'mch_id' => $this->_merchantid,
            'nonce_str' => self::createNonceStr(),
            'total_fee' => intval($totalFee * 100), //订单金额  单位 转为分
            'refund_fee' => intval($refundFee * 100), //退款金额 单位 转为分
            'sign_type' => 'MD5', //签名类型 支持HMAC-SHA256和MD5,默认为MD5
            'transaction_id' => $wxOrderNo, //微信订单号
            'out_trade_no' => $orderNo, //商户订单号
            'out_refund_no' => $refundNo, //商户退款单号
            'refund_desc' => $desc, //退款原因(选填)
        );
        if (!empty($notify_url)) $unified['notify_url'] = $notify_url;
        $unified['sign'] = self::getSign($unified, $this->_key);
        $responseXml = $this->curlPost('https://api.mch.weixin.qq.com/secapi/pay/refund', self::arrayToXml($unified));
        $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
        return $unifiedOrder;
    }

    public function refundquery($refundNo)
    {
        $unified = array(
            'appid' => $this->_appid,
            'mch_id' => $this->_merchantid,
            'nonce_str' => self::createNonceStr(),
            'sign_type' => 'MD5', //签名类型 支持HMAC-SHA256和MD5,默认为MD5
            'out_refund_no' => $refundNo, //商户退款单号
        );
        $unified['sign'] = self::getSign($unified, $this->_key);
        $responseXml = $this->curlPost('https://api.mch.weixin.qq.com/pay/refundquery', self::arrayToXml($unified));
        $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
        return $unifiedOrder;
    }

    public static function curlGet($url = '', $options = array())
    {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        if (!empty($options)) {
            curl_setopt_array($ch, $options);
        }
        //https请求 不验证证书和host
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }

    public function curlPost($url = '', $postData = '', $options = array())
    {
        if (is_array($postData)) {
            $postData = http_build_query($postData);
        }
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数
        if (!empty($options)) {
            curl_setopt_array($ch, $options);
        }
        //https请求 不验证证书和host
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        //第一种方法,cert 与 key 分别属于两个.pem文件
        //默认格式为PEM,可以注释
        curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLCERT, $this->apiclient_cert);//绝对路径
        //默认格式为PEM,可以注释
        curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLKEY, $this->apiclient_key);//绝对路径
        //第二种方式,两个文件合成一个.pem文件
        //    curl_setopt($ch,CURLOPT_SSLCERT,getcwd().'/all.pem');
        $data = curl_exec($ch);
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            echo "curl出错,错误码:$error" . "<br>";
            curl_close($ch);
            return false;
        }
    }

    public static function createNonceStr($length = 16)
    {
        $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        $str = '';
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

    public function arrayToXml($arr)
    {
        $xml = "<xml>";
        foreach ($arr as $key => $val) {
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
            }
        }
        $xml .= "</xml>";
        return $xml;
    }

    public static function xmlToArray($xml)
    {
        $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $array_data;
    }

    public static function getSign($params, $key)
    {
        ksort($params, SORT_STRING);
        $unSignParaString = self::formatQueryParaMap($params, false);
        $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
        return $signStr;
    }

    protected static function formatQueryParaMap($paraMap, $urlEncode = false)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if (null != $v && "null" != $v) {
                if ($urlEncode) {
                    $v = urlencode($v);
                }
                $buff .= $k . "=" . $v . "&";
            }
        }
        $reqPar = '';
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }
}

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