支付宝无密退款接口

首先官方下载demo:

接口说明文档：查看文档

开放平台上传商户公钥，公私钥生成工具：支付宝密钥生成器

一定要采用RSA2签名！！！

$aop = new AopClient (); 
$aop->gatewayUrl = 'https://openapi.alipay.com/gateway.do'; 
$aop->appId = 'your app_id'; $aop->rsaPrivateKey = '请填写开发者私钥去头去尾去回车，一行字符串'; 
$aop->alipayrsaPublicKey='请填写支付宝公钥，一行字符串'; 
$aop->apiVersion = '1.0'; 
$aop->signType = 'RSA2'; 
$aop->postCharset='utf-8'; 
$aop->format='json'; 
$request = new AlipayTradeRefundRequest (); 

$request->setBizContent("{" .
    "\"out_trade_no\":\"{$order_info['order_sn']}\"," .

    "\"refund_amount\":{$order_info['order_price']}," .
    "\"refund_reason\":\"正常退款\"," .
    "\"out_request_no\":\"{$out_refund_no}\"" .
    "}");

$result = $aop->execute ( $request); 

$responseNode = str_replace(".", "_", $request->getApiMethodName()) . "_response"; 
$resultCode = $result->$responseNode->code; 

if(!empty($resultCode)&&$resultCode == 10000){ 
　　//处理逻辑 todo
　　echo "成功";
 } 

else { 
　　echo "失败"; 
}