从零开始学习PHP对接京东工业平台API接口，掌握产品分类管理技巧！

<?php
$client_id = 'Your Client ID'; // 替换成自己的Client ID
$client_secret = 'Your Client Secret'; // 替换成自己的Client Secret

$url = 'https://open.jd.com/oauth2/oauth.html?response_type=code&client_id=' . $client_id . '&redirect_uri=http://your_callback_url.com&state=STATE';
header("Location: $url");
?>

<?php
$client_id = 'Your Client ID'; // 替换成自己的Client ID
$client_secret = 'Your Client Secret'; // 替换成自己的Client Secret
$code = $_GET['code']; // 获取授权码

$url = 'https://open.jd.com/oauth2/accessToken?grant_type=authorization_code&client_id=' . $client_id . '&client_secret=' . $client_secret . '&code=' . $code;
$response = file_get_contents($url);
$data = json_decode($response, true);

$access_token = $data['access_token']; // 获取到的access_token
?>

<?php
$access_token = 'Your Access Token'; // 替换成上一步中获取到的access_token

$url = 'https://open.jd.com/api/category/queryList?access_token=' . $access_token;
$response = file_get_contents($url);
$data = json_decode($response, true);

// 输出分类列表
foreach ($data['result'] as $category) {
    echo $category['name'] . " (ID: " . $category['id'] . ")" . PHP_EOL;
}
?>

<?php
$access_token = 'Your Access Token'; // 替换成上一步中获取到的access_token

$url = 'https://open.jd.com/api/category/queryList?access_token=' . $access_token;
$response = file_get_contents($url);
$data = json_decode($response, true);

$categories = array(); // 分类数组

foreach ($data['result'] as $category) {
    $categories[$category['id']] = $category['name'];
}
?>

<?php
function getCategoryName($categoryId) {
    global $categories; // 全局变量

    if (isset($categories[$categoryId])) {
        return $categories[$categoryId];
    }

    return '未知分类';
}

// 使用示例
echo getCategoryName(123); // 输出：'电子产品'
?>

<?php
function buildCategoryTree($parentId = 0) {
    global $categories; // 全局变量

    $tree = array();

    foreach ($categories as $categoryId => $categoryName) {
        if ($category['parent_id'] == $parentId) {
            $category['sub_categories'] = buildCategoryTree($categoryId);
            $tree[] = $category;
        }
    }

    return $tree;
}

// 使用示例
$categoryTree = buildCategoryTree(0);

function printCategoryTree($categoryTree, $indent = "") {
    foreach ($categoryTree as $category) {
        echo $indent . $category['name'] . PHP_EOL;

        if (isset($category['sub_categories'])) {
            printCategoryTree($category['sub_categories'], $indent . "--");
        }
    }
}

printCategoryTree($categoryTree);
?>