<?php
/**
* 微信小程序退款 处理类
参考
https://www.cnblogs.com/afei-qwerty/p/7922982.html
*
*/
class WeixinRefundModel extends Model {
protected $SSLCERT_PATH = './apiclient_cert.pem';//证书路径
protected $SSLKEY_PATH = './apiclient_key.pem';//证书路径
// function __construct($openid,$outTradeNo,$totalFee,$outRefundNo,$refundFee){
// //初始化退款类需要的变量
// $this->openid = $openid;
// $this->outTradeNo = $outTradeNo;
// $this->totalFee = $totalFee;
// $this->outRefundNo = $outRefundNo;
// $this->refundFee = $refundFee;
// }
/*
* array(9) {
["return_code"] => string(7) "SUCCESS"
["return_msg"] => string(2) "OK"
["appid"] => string(18) "****************"
["mch_id"] => string(10) "8888888"
["nonce_str"] => string(16) "V5BUsFl4ikNVwfWz"
["sign"] => string(32) "4DD91513B5CDA88C43B9D91DE6CE0C2B"
["result_code"] => string(4) "FAIL"
["err_code"] => string(13) "ORDERNOTEXIST"
["err_code_des"] => string(15) "订单不存在"
}
*
*
* array(18) {
["return_code"] => string(7) "SUCCESS"
["return_msg"] => string(2) "OK"
["appid"] => string(18) "***************"
["mch_id"] => string(10) "****************"
["nonce_str"] => string(16) "hYCjvz62vDdPfh3q"
["sign"] => string(32) "438E05D357B9090EBA0ED1A11A046B71"
["result_code"] => string(7) "SUCCESS"
["transaction_id"] => string(28) "4200000288201901186053870346"
["out_trade_no"] => string(15) "qs2878042616316"
["out_refund_no"] => string(15) "ceshi1547811669"
["refund_id"] => string(29) "**************************"
["refund_channel"] => array(0) {}
["refund_fee"] => string(1) "1"
["coupon_refund_fee"] => string(1) "0"
["total_fee"] => string(1) "1"
["cash_fee"] => string(1) "1"
["coupon_refund_count"] => string(1) "0"
["cash_refund_fee"] => string(1) "1"
}
*
* */
//通过微信api进行退款流程
public function wxrefundapi($out_trade_no,$total_fee,$refund_fee){
$parma = array(
'appid' => C('APPID'),
'mch_id' => C('MCHID'),
'nonce_str' => $this->createNoncestr(),
'out_refund_no' => $out_trade_no.rand('1111,9999'), //由后端生成的退款单号，需要保证唯一，因为多个同样的退款单号只会退款一次。
'out_trade_no' => $out_trade_no, //退款订单在支付时生成的订单号
'total_fee' => $total_fee,
'refund_fee' => $refund_fee,
'op_user_id' => C('MCHID'), //操作员 op_user_id .与商户号相同即可
);
$parma['sign'] = $this->getSign($parma);
$xmldata = $this->arrayToXml($parma);
$xmlresult = $this->postXmlSSLCurl($xmldata,'https://api.mch.weixin.qq.com/secapi/pay/refund');
$result = $this->xmlToArray($xmlresult);
setlog($parma,$result,__METHOD__);
if (!$result){
$result_arr = [
'num' => '0',
'desc' => '接口错误',
];
return $result_arr;
}
if ($result['result_code'] != 'SUCCESS'){
$result_arr = [
'num' => '-1',
'desc' => $result['err_code_des']
];
} else {
$result_arr = [
'num' => '1',
'desc' => '退款成功',
'data' => $result['refund_id']
];
}
return $result_arr;
}
/*
* 生成随机字符串方法
*/
protected function createNoncestr($length = 32 ){
$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
$str ="";
for ( $i = 0; $i < $length; $i++ ) {
$str.= substr($chars, mt_rand(0, strlen($chars)-1), 1);
}
return $str;
}
/*
* 对要发送到微信统一下单接口的数据进行签名
*/
protected function getSign($Obj){
foreach ($Obj as $k => $v){
$Parameters[$k] = $v;
}
//签名步骤一：按字典序排序参数
ksort($Parameters);
$String = $this->formatBizQueryParaMap($Parameters, false);
//签名步骤二：在string后加入KEY
$String = $String."&key=".C('WEIXIN_PAY_KEY');
//签名步骤三：MD5加密
$String = md5($String);
//签名步骤四：所有字符转为大写
$result_ = strtoupper($String);
return $result_;
}
/*
*排序并格式化参数方法，签名时需要使用
*/
protected function formatBizQueryParaMap($paraMap, $urlencode)
{
$buff = "";
ksort($paraMap);
foreach ($paraMap as $k => $v)
{
if($urlencode)
{
$v = urlencode($v);
}
//$buff .= strtolower($k) . "=" . $v . "&";
$buff .= $k . "=" . $v . "&";
}
$reqPar = '';
if (strlen($buff) > 0)
{
$reqPar = substr($buff, 0, strlen($buff)-1);
}
return $reqPar;
}
//数组转字符串方法
protected function arrayToXml($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 $xml;
}
protected function xmlToArray($xml){
$array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
return $array_data;
}
//需要使用证书的请求
function postXmlSSLCurl($xml,$url,$second=30)
{
$ch = curl_init();
//超时时间
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
//这里设置代理，如果有的话
//curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
//curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
//设置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
//设置证书
//使用证书：cert 与 key 分别属于两个.pem文件
//默认格式为PEM，可以注释
curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
curl_setopt($ch, CURLOPT_SSLCERT, $this->SSLCERT_PATH);
//默认格式为PEM，可以注释
curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
curl_setopt($ch, CURLOPT_SSLKEY, $this->SSLKEY_PATH);
//post提交方式
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
$data = curl_exec($ch);
//返回结果
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;
}
}
}