第PHP實現微信退款的方法示例protected$appId='';//appId

function__construct($outTradeNo,$totalFee,$outRefundNo,$refundFee)

//初始化退款類需要的變量

$this-totalFee=$totalFee;//訂單金額

$this-refundFee=$refundFee;//退款金額

$this-outTradeNo=$outTradeNo;//訂單號

$this-outRefundNo=$outRefundNo;//退款訂單

*通過微信api進行退款流程唯一對外接口

*@returnstring

publicfunctionrefundApi()

$parma=array(

'appid'=$this-appId,

'mch_id'=$this-opUserId,

'nonce_str'=randoms(32),//這個是隨機數自己封裝去吧。。。

'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,'/secapi/pay/refund');

$result=$this-arrayToXml($xmlresult);

return$result;

*數組轉xml

*@param$arr

*@returnstring

protectedfunctionarrayToXml($arr)

$xml="xml

foreach($arras$key=$val){

if(is_numeric($val)){

$xml.="".$key."".$val."/".$key."

}else{

$xml.="".$key."![CDATA[".$val."]]/".$key."

$xml.="/xml

return$xml;

*簽名加密

*@param$params

*@param$key

protectedfunctiongetSign($params,$key)

ksort($params,SORT_STRING);

$unSignParaString=$this-formatQueryParaMap($params,false);

return$signStr=strtoupper(md5($unSignParaString."key=".$key));

*排序

*@param$paraMap

*@parambool$urlEncode

*@returnbool|string

protectedfunctionformatQueryParaMap($paraMap,$urlEncode=false)

$buff="";

ksort($paraMap);

foreach($paraMapas$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;

*需要使用證書的請求

*@param$xml

*@param$url

*@paramint$second

*@returnbool|mixed

protectedfunctionpostXmlSSLCurl($xml,$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出錯，錯誤碼:$error"."br

curl_close($ch);

returnfalse;

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