使用PHP编写京东工业平台API接口对接代码，实现订单取消功能！

<?php
function getAccessToken($appKey, $appSecret) {
    $url = 'https://open.jd.com/oauth2/access_token?grant_type=client_credentials&app_key='.$appKey.'&app_secret='.$appSecret;
    $response = file_get_contents($url);
    $result = json_decode($response, true);
    if ($result && isset($result['access_token'])) {
        return $result['access_token'];
    } else {
        return '';
    }
}

$appKey = 'your_app_key';
$appSecret = 'your_app_secret';
$accessToken = getAccessToken($appKey, $appSecret);
echo 'Access Token: '.$accessToken;
?>

<?php
function cancelOrder($accessToken, $orderId) {
    $url = 'https://bizapi.jd.com/api/order/cancelOrder';
    $params = array(
        'token' => $accessToken,
        'orderId' => $orderId,
    );
    $query = http_build_query($params);
    $options = array(
        'http' => array(
            'method' => 'POST',
            'header' => 'Content-type: application/x-www-form-urlencoded',
            'content' => $query,
        ),
    );
    $context = stream_context_create($options);
    $response = file_get_contents($url, false, $context);
    $result = json_decode($response, true);
    if ($result && isset($result['success']) && $result['success']) {
        return true;
    } else {
        return false;
    }
}

$orderId = 'your_order_id';
$result = cancelOrder($accessToken, $orderId);
if ($result) {
    echo '订单取消成功！';
} else {
    echo '订单取消失败！';
}
?>