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：
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$obj = new WXRefund('参数');
$obj->refundApi();
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直接能用 公众号的参数 自己加上吧 只能帮你们到这了！
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<?php
namespace Wechat;
/**
* 微信退款
* @author zzy
* @version $V1.0.0$
* @date 2018-11-9
*/
class WXRefund
{
protected $SSLCERT_PATH ='';//证书
protected $SSLKEY_PATH = '';//证书
protected $opUserId = '';//商户号
protected $key = '';//API密钥
protected $appId = '';//appId
function __construct($outTradeNo, $totalFee, $outRefundNo, $refundFee)
{
//初始化退款类需要的变量
$this->totalFee = $totalFee;//订单金额
$this->refundFee = $refundFee;//退款金额
$this->outTradeNo = $outTradeNo;//订单号
$this->outRefundNo = $outRefundNo;//退款订单
}
/**
* 通过微信api进行退款流程 唯一对外接口
* @return string
*/
public function refundApi()
{
$parma = array(
'appid' => $this->appId,
'mch_id' => $this->opUserId,
'nonce_str' => randoms(32),//这个是随机数 自己封装去吧。。。
'out_refund_no' => $this->outRefundNo,
'out_trade_no' => $this->outTradeNo,
'total_fee' => intval($this->totalFee * 100),
'refund_fee' => intval($this->refundFee * 100),
);
$parma['sign'] = $this->getSign($parma, $this->key);
$xmldata = $this->arrayToXml($parma);
$xmlresult = $this->postXmlSSLCurl($xmldata, 'https://api.mch.weixin.qq.com/secapi/pay/refund');
$result = $this->arrayToXml($xmlresult);
return $result;
}
/**
* 数组转xml
* @param $arr
* @return string
*/
protected function arrayToXml($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;
}
/**
* 签名加密
* @param $params
* @param $key
*/
protected function getSign($params, $key)
{
ksort($params, SORT_STRING);
$unSignParaString = $this->formatQueryParaMap($params, false);
return $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
}
/**
* 排序
* @param $paraMap
* @param bool $urlEncode
* @return bool|string
*/
protected function formatQueryParaMap($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;
}
/**
* 需要使用证书的请求
* @param $xml
* @param $url
* @param int $second
* @return bool|mixed
*/
protected function postXmlSSLCurl($xml, $url, $second = 30)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
curl_setopt($ch, CURLOPT_SSLCERT, $this->SSLCERT_PATH);
curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
curl_setopt($ch, CURLOPT_SSLKEY, $this->SSLKEY_PATH);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
$data = curl_exec($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;
}
}
}
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希望本文所述对大家PHP程序设计有所帮助。