这篇文章主要介绍了PHP实现微信退款的方法,结合实例形式分析了php微信退款功能操作类与相关使用技巧,需要的朋友可以参考下。

本文实例讲述了PHP实现微信退款的方法，分享给大家供大家参考，具体如下：

$obj = new WXRefund('参数');

$obj->refundApi();

直接能用 公众号的参数 自己加上吧 只能帮你们到这了！

1. <?php
2. namespace Wechat;
3. /**
4. * 微信退款
5. * @author zzy
6. * @version $V1.0.0$
7. * @date 2018-11-9
8. */
9. class WXRefund
10. {
11. protected $SSLCERT_PATH ='';//证书
12. protected $SSLKEY_PATH = '';//证书
13. protected $opUserId = '';//商户号
14. protected $key = '';//API密钥
15. protected $appId = '';//appId
16. function __construct($outTradeNo, $totalFee, $outRefundNo, $refundFee)
17. {
18. //初始化退款类需要的变量
19. $this->totalFee = $totalFee;//订单金额
20. $this->refundFee = $refundFee;//退款金额
21. $this->outTradeNo = $outTradeNo;//订单号
22. $this->outRefundNo = $outRefundNo;//退款订单
23. }
24. /**
25. * 通过微信api进行退款流程 唯一对外接口
26. * @return string
27. */
28. public function refundApi()
29. {
30. $parma = array(
31. 'appid' => $this->appId,
32. 'mch_id' => $this->opUserId,
33. 'nonce_str' => randoms(32),//这个是随机数 自己封装去吧。。。
34. 'out_refund_no' => $this->outRefundNo,
35. 'out_trade_no' => $this->outTradeNo,
36. 'total_fee' => intval($this->totalFee * 100),
37. 'refund_fee' => intval($this->refundFee * 100),
38. );
39. $parma['sign'] = $this->getSign($parma, $this->key);
40. $xmldata = $this->arrayToXml($parma);
41. $xmlresult = $this->postXmlSSLCurl($xmldata, 'https://api.mch.weixin.qq.com/secapi/pay/refund');
42. $result = $this->arrayToXml($xmlresult);
43. return $result;
44. }
45. /**
46. * 数组转xml
47. * @param $arr
48. * @return string
49. */
50. protected function arrayToXml($arr)
51. {
52. $xml = "<xml>";
53. foreach ($arr as $key => $val) {
54. if (is_numeric($val)) {
55. $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
56. } else {
57. $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
58. }
59. }
60. $xml .= "</xml>";
61. return $xml;
62. }
63. /**
64. * 签名加密
65. * @param $params
66. * @param $key
67. */
68. protected function getSign($params, $key)
69. {
70. ksort($params, SORT_STRING);
71. $unSignParaString = $this->formatQueryParaMap($params, false);
72. return $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
73. }
74. /**
75. * 排序
76. * @param $paraMap
77. * @param bool $urlEncode
78. * @return bool|string
79. */
80. protected function formatQueryParaMap($paraMap, $urlEncode = false)
81. {
82. $buff = "";
83. ksort($paraMap);
84. foreach ($paraMap as $k => $v) {
85. if (null != $v && "null" != $v) {
86. if ($urlEncode) {
87. $v = urlencode($v);
88. }
89. $buff .= $k . "=" . $v . "&";
90. }
91. }
92. $reqPar = '';
93. if (strlen($buff) > 0) {
94. $reqPar = substr($buff, 0, strlen($buff) - 1);
95. }
96. return $reqPar;
97. }
98. /**
99. * 需要使用证书的请求
100. * @param $xml
101. * @param $url
102. * @param int $second
103. * @return bool|mixed
104. */
105. protected function postXmlSSLCurl($xml, $url, $second = 30)
106. {
107. $ch = curl_init();
108. curl_setopt($ch, CURLOPT_TIMEOUT, $second);
109. curl_setopt($ch, CURLOPT_URL, $url);
110. curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
111. curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
112. curl_setopt($ch, CURLOPT_HEADER, FALSE);
113. curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
114. curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
115. curl_setopt($ch, CURLOPT_SSLCERT, $this->SSLCERT_PATH);
116. curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
117. curl_setopt($ch, CURLOPT_SSLKEY, $this->SSLKEY_PATH);
118. curl_setopt($ch, CURLOPT_POST, true);
119. curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
120. $data = curl_exec($ch);
121. if ($data) {
122. curl_close($ch);
123. return $data;
124. } else {
125. $error = curl_errno($ch);
126. echo "curl出错，错误码:$error" . "<br>";
127. curl_close($ch);
128. return false;
129. }
130. }
131. }