/**

* 微信退款

*

* @access  public

* @param  string      $total_amount    订单总金额      单位 分!!!!!!!!!!!!!!!!!!!!!!

* @param  string      $refund_fee    退款金额      单位 分!!!!!!!!!!!!!!!!!!!!!!

* @param  string      $out_trade_no    支付时传入的订单号

* @return  string      $out_request_no  订单的退款单号

*/

public function refund_order($total_amount,$refund_fee, $out_trade_no,$out_request_no)

{

$data = array();

$data['appid'] = $this->user_config['appid'];

$data['mch_id'] = $this->user_config['mch_id'];

$data['nonce_str'] = MD5(time().rand(10000,99999));

//        $data['body'] = $body;

$data['out_trade_no'] = (string)$out_trade_no;

$data['out_refund_no'] = (string)$out_request_no;

$data['total_fee'] = (int)$total_amount;

$data['refund_fee'] = (int)$refund_fee;

$data['sign'] = getSign($data,$this->user_config['api']);

//转为xml格式

$xml_str = arrayToXml($data);

//发送请求 使用封装好的curl_post

$result = postXmlRefundCurl($xml_str);

//解析得到的值

$res = xmlstr_to_array($result);

if($res['result_code'] == "SUCCESS")

{

$data = [

'status' => true,

'msg' => '退款成功'

];

}

else

{

$data = [

'status' => false,

'msg' =>'退款失败,'.$res['err_code_des']

];

}

return $data;

}

function postXmlRefundCurl($xml,$url='https://api.mch.weixin.qq.com/secapi/pay/refund') { //初始化curl $ch = curl_init(); //设置抓取的url curl_setopt($ch, CURLOPT_URL, $url); //设置头文件的信息作为数据流输出// curl_setopt($ch, CURLOPT_HEADER, 1); //设置获取的信息以文件流的形式返回，而不是直接输出。 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //证书检查 curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,1); curl_setopt($ch,CURLOPT_SSLCERTTYPE,'pem'); curl_setopt($ch,CURLOPT_SSLCERT,dirname(__FILE__).'/wxcertificate/apiclient_cert.pem'); curl_setopt($ch,CURLOPT_SSLCERTTYPE,'pem'); curl_setopt($ch,CURLOPT_SSLKEY,dirname(__FILE__).'/wxcertificate/apiclient_key.pem'); curl_setopt($ch,CURLOPT_SSLCERTTYPE,'pem'); curl_setopt($ch,CURLOPT_CAINFO,dirname(__FILE__).'/wxcertificate/rootca.pem'); //设置post方式提交 curl_setopt($ch, CURLOPT_POST, 1); //设置post数据 curl_setopt($ch, CURLOPT_POSTFIELDS, $xml); //执行命令 $data = curl_exec($ch); if($data) { curl_close($ch); return $data; } else { $error = curl_errno($ch); echo "curl出错，错误码:$error"."

";            echo "错误原因查询

";            curl_close($ch);            return false;        }    }