通过PHP对接京东工业平台API接口，快速实现订单退款功能！

<?php

// API接口URL，根据实际情况修改
$apiURL = 'https://api.jd.com/routerjson';

// API接口参数，根据实际情况修改
$params = array(
    'method' => 'jingdong.ware.order.cancel.refuse',
    'access_token' => '您的API密钥',
    'app_key' => '您的应用Key',
    'timestamp' => date('Y-m-d H:i:s'),
    'format' => 'json',
    'v' => '2.0',
    '360buy_param_json' => '{"jdOrderId":"1234567890","cancelTime":"2021-01-01 00:00:00","reason":"不想要了"}',
);

// 参数签名
ksort($params); // 参数按照ASCII码升序排序
$signature = '';
foreach ($params as $key => $value) {
    $signature .= $key . $value;
}
$signature .= '您的密钥'; // 密钥拼接在最后
$params['sign'] = strtoupper(md5($signature)); // 使用MD5加密，并转为大写

// 发送POST请求
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $apiURL);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$response = curl_exec($ch);
curl_close($ch);

// 解析响应结果
$result = json_decode($response, true);
if ($result['success']) {
    echo '退款成功！';
} else {
    echo '退款失败：' . $result['resultMessage'];
}

?>