在数字文创产业快速发展的今天，内容创作者需要一个灵活的系统来管理和交付他们的数字产品。本教程将指导您开发一个WordPress插件，实现文创数字产品的柔性交付与授权管理。

核心功能需求：

1. 支持多种数字产品类型（电子书、图片、音频、视频等）
2. 灵活的交付方式（直接下载、邮件发送、API接口）
3. 授权管理（使用期限、设备限制、访问次数）
4. 订单与用户管理
5. 安全防护与防滥用机制

首先，我们创建插件的基本文件结构：

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<?php
/**
 * Plugin Name: 文创数字产品交付与授权系统
 * Plugin URI: https://yourwebsite.com/
 * Description: 为WordPress网站提供文创数字产品的柔性交付与授权管理功能
 * Version: 1.0.0
 * Author: 您的名称
 * License: GPL v2 or later
 */

// 防止直接访问
if (!defined('ABSPATH')) {
    exit;
}

// 定义插件常量
define('CDPDA_VERSION', '1.0.0');
define('CDPDA_PLUGIN_DIR', plugin_dir_path(__FILE__));
define('CDPDA_PLUGIN_URL', plugin_dir_url(__FILE__));

// 初始化插件
class CulturalDigitalProduct_DeliveryAuth {
    
    private static $instance = null;
    
    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    private function __construct() {
        $this->init_hooks();
    }
    
    private function init_hooks() {
        // 激活/停用钩子
        register_activation_hook(__FILE__, array($this, 'activate'));
        register_deactivation_hook(__FILE__, array($this, 'deactivate'));
        
        // 初始化
        add_action('init', array($this, 'init'));
        
        // 管理菜单
        add_action('admin_menu', array($this, 'add_admin_menu'));
        
        // 加载脚本和样式
        add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_scripts'));
        add_action('wp_enqueue_scripts', array($this, 'enqueue_frontend_scripts'));
    }
    
    public function activate() {
        // 创建必要的数据库表
        $this->create_database_tables();
        
        // 设置默认选项
        $this->set_default_options();
        
        // 刷新重写规则
        flush_rewrite_rules();
    }
    
    public function deactivate() {
        // 清理临时数据
        // 注意：不删除用户数据
        flush_rewrite_rules();
    }
    
    public function init() {
        // 注册自定义文章类型
        $this->register_post_types();
        
        // 注册短代码
        $this->register_shortcodes();
    }
    
    // 其他方法将在后续部分实现
}

// 启动插件
CulturalDigitalProduct_DeliveryAuth::get_instance();
?>

创建必要的数据库表来存储产品、订单和授权信息：

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<?php
// 在activate方法中调用
private function create_database_tables() {
    global $wpdb;
    
    $charset_collate = $wpdb->get_charset_collate();
    
    // 产品表
    $table_products = $wpdb->prefix . 'cdpda_products';
    $sql_products = "CREATE TABLE IF NOT EXISTS $table_products (
        id bigint(20) NOT NULL AUTO_INCREMENT,
        post_id bigint(20) NOT NULL,
        product_type varchar(50) NOT NULL,
        file_path text,
        file_size bigint(20),
        file_hash varchar(64),
        delivery_methods text,
        price decimal(10,2),
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        updated_at datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
        PRIMARY KEY (id),
        KEY post_id (post_id)
    ) $charset_collate;";
    
    // 订单表
    $table_orders = $wpdb->prefix . 'cdpda_orders';
    $sql_orders = "CREATE TABLE IF NOT EXISTS $table_orders (
        id bigint(20) NOT NULL AUTO_INCREMENT,
        order_number varchar(50) NOT NULL,
        user_id bigint(20) NOT NULL,
        product_id bigint(20) NOT NULL,
        amount decimal(10,2) NOT NULL,
        status varchar(20) DEFAULT 'pending',
        payment_method varchar(50),
        transaction_id varchar(100),
        customer_email varchar(100),
        customer_ip varchar(45),
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        completed_at datetime,
        PRIMARY KEY (id),
        UNIQUE KEY order_number (order_number),
        KEY user_id (user_id),
        KEY product_id (product_id)
    ) $charset_collate;";
    
    // 授权表
    $table_licenses = $wpdb->prefix . 'cdpda_licenses';
    $sql_licenses = "CREATE TABLE IF NOT EXISTS $table_licenses (
        id bigint(20) NOT NULL AUTO_INCREMENT,
        license_key varchar(64) NOT NULL,
        order_id bigint(20) NOT NULL,
        product_id bigint(20) NOT NULL,
        user_id bigint(20),
        expires_at datetime,
        max_devices int DEFAULT 1,
        usage_count int DEFAULT 0,
        max_usage int DEFAULT NULL,
        status varchar(20) DEFAULT 'active',
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        last_used datetime,
        PRIMARY KEY (id),
        UNIQUE KEY license_key (license_key),
        KEY order_id (order_id),
        KEY product_id (product_id),
        KEY user_id (user_id)
    ) $charset_collate;";
    
    require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
    dbDelta($sql_products);
    dbDelta($sql_orders);
    dbDelta($sql_licenses);
}
?>

创建自定义文章类型来管理数字产品：

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<?php
private function register_post_types() {
    // 注册数字产品自定义文章类型
    $labels = array(
        'name'               => '数字产品',
        'singular_name'      => '数字产品',
        'menu_name'          => '数字产品',
        'add_new'            => '添加产品',
        'add_new_item'       => '添加新数字产品',
        'edit_item'          => '编辑产品',
        'new_item'           => '新产品',
        'view_item'          => '查看产品',
        'search_items'       => '搜索产品',
        'not_found'          => '未找到产品',
        'not_found_in_trash' => '回收站中无产品'
    );
    
    $args = array(
        'labels'             => $labels,
        'public'             => true,
        'publicly_queryable' => true,
        'show_ui'            => true,
        'show_in_menu'       => true,
        'query_var'          => true,
        'rewrite'            => array('slug' => 'digital-product'),
        'capability_type'    => 'post',
        'has_archive'        => true,
        'hierarchical'       => false,
        'menu_position'      => 30,
        'menu_icon'          => 'dashicons-products',
        'supports'           => array('title', 'editor', 'thumbnail', 'excerpt'),
        'show_in_rest'       => true
    );
    
    register_post_type('digital_product', $args);
    
    // 添加产品类型分类
    register_taxonomy(
        'product_type',
        'digital_product',
        array(
            'label' => '产品类型',
            'rewrite' => array('slug' => 'product-type'),
            'hierarchical' => true,
            'show_in_rest' => true
        )
    );
}

// 添加产品元数据框
public function add_product_meta_boxes() {
    add_meta_box(
        'cdpda_product_details',
        '产品详情',
        array($this, 'render_product_meta_box'),
        'digital_product',
        'normal',
        'high'
    );
}

public function render_product_meta_box($post) {
    // 获取现有值
    $product_type = get_post_meta($post->ID, '_cdpda_product_type', true);
    $price = get_post_meta($post->ID, '_cdpda_price', true);
    $file_url = get_post_meta($post->ID, '_cdpda_file_url', true);
    $delivery_methods = get_post_meta($post->ID, '_cdpda_delivery_methods', true);
    
    // 非ce字段
    wp_nonce_field('cdpda_save_product_meta', 'cdpda_product_meta_nonce');
    
    // 显示表单
    ?>
    <div class="cdpda-meta-box">
        <div class="cdpda-field">
            <label for="cdpda_product_type">产品类型：</label>
            <select id="cdpda_product_type" name="cdpda_product_type">
                <option value="ebook" <?php selected($product_type, 'ebook'); ?>>电子书</option>
                <option value="image" <?php selected($product_type, 'image'); ?>>图片</option>
                <option value="audio" <?php selected($product_type, 'audio'); ?>>音频</option>
                <option value="video" <?php selected($product_type, 'video'); ?>>视频</option>
                <option value="software" <?php selected($product_type, 'software'); ?>>软件</option>
                <option value="template" <?php selected($product_type, 'template'); ?>>模板</option>
            </select>
        </div>
        
        <div class="cdpda-field">
            <label for="cdpda_price">价格（元）：</label>
            <input type="number" id="cdpda_price" name="cdpda_price" 
                   value="<?php echo esc_attr($price); ?>" step="0.01" min="0">
        </div>
        
        <div class="cdpda-field">
            <label for="cdpda_file_url">文件URL：</label>
            <input type="url" id="cdpda_file_url" name="cdpda_file_url" 
                   value="<?php echo esc_url($file_url); ?>" style="width: 70%;">
            <button type="button" class="button cdpda-upload-file">上传文件</button>
        </div>
        
        <div class="cdpda-field">
            <label>交付方式：</label>
            <label><input type="checkbox" name="cdpda_delivery_methods[]" 
                         value="direct_download" <?php echo in_array('direct_download', (array)$delivery_methods) ? 'checked' : ''; ?>> 直接下载</label>
            <label><input type="checkbox" name="cdpda_delivery_methods[]" 
                         value="email" <?php echo in_array('email', (array)$delivery_methods) ? 'checked' : ''; ?>> 邮件发送</label>
            <label><input type="checkbox" name="cdpda_delivery_methods[]" 
                         value="api" <?php echo in_array('api', (array)$delivery_methods) ? 'checked' : ''; ?>> API接口</label>
        </div>
    </div>
    <?php
}

// 保存产品元数据
public function save_product_meta($post_id) {
    // 安全检查
    if (!isset($_POST['cdpda_product_meta_nonce']) || 
        !wp_verify_nonce($_POST['cdpda_product_meta_nonce'], 'cdpda_save_product_meta')) {
        return;
    }
    
    // 检查自动保存
    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
        return;
    }
    
    // 检查权限
    if (!current_user_can('edit_post', $post_id)) {
        return;
    }
    
    // 保存字段
    $fields = array(
        'cdpda_product_type',
        'cdpda_price',
        'cdpda_file_url'
    );
    
    foreach ($fields as $field) {
        if (isset($_POST[$field])) {
            update_post_meta($post_id, '_' . $field, sanitize_text_field($_POST[$field]));
        }
    }
    
    // 保存交付方式（数组）
    if (isset($_POST['cdpda_delivery_methods'])) {
        $delivery_methods = array_map('sanitize_text_field', $_POST['cdpda_delivery_methods']);
        update_post_meta($post_id, '_cdpda_delivery_methods', $delivery_methods);
    } else {
        delete_post_meta($post_id, '_cdpda_delivery_methods');
    }
}
?>

实现授权密钥生成和验证系统：

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<?php
class CDPDA_License_Manager {
    
    /**
     * 生成授权密钥
     * @param int $order_id 订单ID
     * @param int $product_id 产品ID
     * @param array $options 授权选项
     * @return string 授权密钥
     */
    public static function generate_license_key($order_id, $product_id, $options = array()) {
        // 基础数据
        $data = array(
            'order_id' => $order_id,
            'product_id' => $product_id,
            'timestamp' => time(),
            'rand' => wp_generate_password(8, false)
        );
        
        // 合并选项
        $data = array_merge($data, $options);
        
        // 创建字符串
        $string = implode('|', $data);
        
        // 生成密钥（使用SHA256哈希）
        $license_key = hash('sha256', $string);
        
        // 格式化为分段显示
        $formatted_key = implode('-', str_split($license_key, 8));
        
        return $formatted_key;
    }
    
    /**
     * 验证授权密钥
     * @param string $license_key 授权密钥
     * @param int $product_id 产品ID（可选）
     * @return array|bool 验证结果
     */
    public static function validate_license($license_key, $product_id = null) {
        global $wpdb;
        
        // 清理密钥格式
        $clean_key = str_replace('-', '', $license_key);
        
        $table_licenses = $wpdb->prefix . 'cdpda_licenses';
        
        // 构建查询
        $query = $wpdb->prepare(
            "SELECT * FROM $table_licenses WHERE license_key = %s AND status = 'active'",
            $clean_key
        );
        
        if ($product_id) {
            $query .= $wpdb->prepare(" AND product_id = %d", $product_id);
        }
        
        $license = $wpdb->get_row($query, ARRAY_A);
        
        if (!$license) {
            return array(
                'valid' => false,
                'message' => '授权密钥无效或已过期'
            );
        }
        
        // 检查过期时间
        if ($license['expires_at'] && strtotime($license['expires_at']) < time()) {
            return array(
                'valid' => false,
                'message' => '授权已过期'
            );
        }
        
        // 检查使用次数限制
        if ($license['max_usage'] && $license['usage_count'] >= $license['max_usage']) {
            return array(
                'valid' => false,
                'message' => '已达到最大使用次数'
            );
        }
        
        // 更新最后使用时间
        $wpdb->update(
            $table_licenses,
            array(
                'last_used' => current_time('mysql'),
                'usage_count' => $license['usage_count'] + 1
            ),
            array('id' => $license['id'])
        );
        
        return array(
            'valid' => true,
            'license' => $license,
            'message' => '授权验证成功'
        );
    }
    
    /**
     * 创建授权记录
     * @param array $data 授权数据
     * @return int|bool 授权ID或false
     */
    public static function create_license($data) {
        global $wpdb;
        
        $table_licenses = $wpdb->prefix . 'cdpda_licenses';
        
        $defaults = array(
            'license_key' => '',
            'order_id' => 0,
            'product_id' => 0,
            'user_id' => 0,
            'expires_at' => null,
            'max_devices' => 1,
            'max_usage' => null,
            'status' => 'active'
        );
        
        $data = wp_parse_args($data, $defaults);
        
        // 如果没有提供密钥，生成一个
        if (empty($data['license_key'])) {
            $data['license_key'] = str_replace('-', '', 
                self::generate_license_key($data['order_id'], $data['product_id'])
            );
        }
        
        // 插入数据库
        $result = $wpdb->insert($table_licenses, $data);
        
        if ($result) {
            return $wpdb->insert_id;
        }
        
        return false;
    }
}
?>

实现多种交付方式：

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<?php
class CDPDA_Delivery_System {
    
    /**
     * 交付数字产品
     * @param int $order_id 订单ID
     * @param string $method 交付方式
     * @return array 交付结果
     */
    public static function deliver_product($order_id, $method = 'direct_download') {
        global $wpdb;
        
        $table_orders = $wpdb->prefix . 'cdpda_orders';

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<?php
$wpdb->prefix . 'cdpda_products';
        
        // 获取订单信息
        $order = $wpdb->get_row($wpdb->prepare(
            "SELECT o.*, p.post_id, p.file_path, p.delivery_methods 
             FROM $table_orders o 
             LEFT JOIN $table_products p ON o.product_id = p.id 
             WHERE o.id = %d", 
            $order_id
        ), ARRAY_A);
        
        if (!$order) {
            return array(
                'success' => false,
                'message' => '订单不存在'
            );
        }
        
        // 检查订单状态
        if ($order['status'] !== 'completed') {
            return array(
                'success' => false,
                'message' => '订单未完成支付'
            );
        }
        
        // 根据交付方式处理
        switch ($method) {
            case 'direct_download':
                return self::direct_download($order);
                
            case 'email':
                return self::email_delivery($order);
                
            case 'api':
                return self::api_delivery($order);
                
            default:
                return array(
                    'success' => false,
                    'message' => '不支持的交付方式'
                );
        }
    }
    
    /**
     * 直接下载交付
     */
    private static function direct_download($order) {
        $file_path = get_post_meta($order['post_id'], '_cdpda_file_url', true);
        
        if (!$file_path || !file_exists($file_path)) {
            return array(
                'success' => false,
                'message' => '文件不存在'
            );
        }
        
        // 记录下载日志
        self::log_download($order['id'], 'direct_download');
        
        // 生成临时下载链接（带过期时间）
        $download_url = self::generate_download_url($order['id']);
        
        return array(
            'success' => true,
            'message' => '下载链接已生成',
            'download_url' => $download_url,
            'expires_in' => '24小时'
        );
    }
    
    /**
     * 邮件交付
     */
    private static function email_delivery($order) {
        $customer_email = $order['customer_email'];
        $product_title = get_the_title($order['post_id']);
        $file_path = get_post_meta($order['post_id'], '_cdpda_file_url', true);
        
        // 生成下载链接
        $download_url = self::generate_download_url($order['id']);
        
        // 邮件内容
        $subject = '您的数字产品已准备就绪：' . $product_title;
        $message = "
        <html>
        <body>
            <h2>感谢您的购买！</h2>
            <p>您购买的产品 <strong>{$product_title}</strong> 已准备就绪。</p>
            <p>下载链接：<a href='{$download_url}'>{$download_url}</a></p>
            <p>链接有效期：24小时</p>
            <p>如需帮助，请联系客服。</p>
        </body>
        </html>
        ";
        
        // 设置邮件头
        $headers = array(
            'Content-Type: text/html; charset=UTF-8',
            'From: ' . get_bloginfo('name') . ' <' . get_option('admin_email') . '>'
        );
        
        // 发送邮件
        $sent = wp_mail($customer_email, $subject, $message, $headers);
        
        if ($sent) {
            // 记录邮件发送日志
            self::log_delivery($order['id'], 'email');
            
            return array(
                'success' => true,
                'message' => '产品已发送到您的邮箱'
            );
        }
        
        return array(
            'success' => false,
            'message' => '邮件发送失败'
        );
    }
    
    /**
     * API接口交付
     */
    private static function api_delivery($order) {
        // 生成API访问令牌
        $api_token = self::generate_api_token($order['id']);
        
        // 创建API端点
        $api_endpoint = home_url('/cdpda-api/v1/download/' . $order['id']);
        
        return array(
            'success' => true,
            'message' => 'API访问信息已生成',
            'api_endpoint' => $api_endpoint,
            'api_token' => $api_token,
            'expires_in' => '72小时'
        );
    }
    
    /**
     * 生成下载URL
     */
    private static function generate_download_url($order_id) {
        $token = wp_hash($order_id . time());
        
        // 存储临时令牌（24小时有效）
        set_transient('cdpda_download_' . $token, $order_id, 24 * HOUR_IN_SECONDS);
        
        return add_query_arg(array(
            'cdpda_download' => $token,
            'order_id' => $order_id
        ), home_url('/download/'));
    }
    
    /**
     * 记录下载日志
     */
    private static function log_download($order_id, $method) {
        global $wpdb;
        
        $table_logs = $wpdb->prefix . 'cdpda_download_logs';
        
        $wpdb->insert($table_logs, array(
            'order_id' => $order_id,
            'delivery_method' => $method,
            'ip_address' => $_SERVER['REMOTE_ADDR'],
            'user_agent' => $_SERVER['HTTP_USER_AGENT'],
            'downloaded_at' => current_time('mysql')
        ));
    }
}
?>

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<?php
class CDPDA_Order_Processor {
    
    /**
     * 创建新订单
     */
    public static function create_order($product_id, $user_id = null, $customer_data = array()) {
        global $wpdb;
        
        $table_orders = $wpdb->prefix . 'cdpda_orders';
        
        // 获取产品信息
        $product = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}cdpda_products WHERE id = %d",
            $product_id
        ), ARRAY_A);
        
        if (!$product) {
            return false;
        }
        
        // 生成订单号
        $order_number = 'CDP' . date('Ymd') . strtoupper(wp_generate_password(8, false));
        
        // 获取用户信息
        if (!$user_id && is_user_logged_in()) {
            $user_id = get_current_user_id();
        }
        
        $default_customer_data = array(
            'email' => '',
            'name' => '',
            'ip' => $_SERVER['REMOTE_ADDR']
        );
        
        $customer_data = wp_parse_args($customer_data, $default_customer_data);
        
        // 创建订单数据
        $order_data = array(
            'order_number' => $order_number,
            'user_id' => $user_id ?: 0,
            'product_id' => $product_id,
            'amount' => $product['price'],
            'status' => 'pending',
            'customer_email' => $customer_data['email'],
            'customer_ip' => $customer_data['ip'],
            'created_at' => current_time('mysql')
        );
        
        // 插入数据库
        $result = $wpdb->insert($table_orders, $order_data);
        
        if ($result) {
            $order_id = $wpdb->insert_id;
            
            // 记录订单创建日志
            self::log_order_action($order_id, 'created', '订单已创建');
            
            return array(
                'order_id' => $order_id,
                'order_number' => $order_number,
                'amount' => $product['price']
            );
        }
        
        return false;
    }
    
    /**
     * 处理支付回调
     */
    public static function process_payment($order_id, $payment_data) {
        global $wpdb;
        
        $table_orders = $wpdb->prefix . 'cdpda_orders';
        
        // 更新订单状态
        $updated = $wpdb->update(
            $table_orders,
            array(
                'status' => 'completed',
                'payment_method' => $payment_data['method'],
                'transaction_id' => $payment_data['transaction_id'],
                'completed_at' => current_time('mysql')
            ),
            array('id' => $order_id)
        );
        
        if ($updated) {
            // 创建授权密钥
            $order = $wpdb->get_row($wpdb->prepare(
                "SELECT * FROM $table_orders WHERE id = %d",
                $order_id
            ), ARRAY_A);
            
            $license_id = CDPDA_License_Manager::create_license(array(
                'order_id' => $order_id,
                'product_id' => $order['product_id'],
                'user_id' => $order['user_id'],
                'expires_at' => date('Y-m-d H:i:s', strtotime('+1 year'))
            ));
            
            // 发送订单完成通知
            self::send_order_complete_notification($order_id);
            
            // 记录日志
            self::log_order_action($order_id, 'payment_completed', '支付完成');
            
            return true;
        }
        
        return false;
    }
    
    /**
     * 发送订单完成通知
     */
    private static function send_order_complete_notification($order_id) {
        global $wpdb;
        
        $order = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}cdpda_orders WHERE id = %d",
            $order_id
        ), ARRAY_A);
        
        if (!$order || !$order['customer_email']) {
            return;
        }
        
        $product_title = get_the_title($order['post_id']);
        
        $subject = '订单支付成功：' . $order['order_number'];
        $message = "
        <html>
        <body>
            <h2>订单支付成功！</h2>
            <p>订单号：{$order['order_number']}</p>
            <p>产品：{$product_title}</p>
            <p>金额：{$order['amount']}元</p>
            <p>支付时间：" . date('Y-m-d H:i:s') . "</p>
            <p>您可以在<a href='" . home_url('/my-account/orders/') . "'>我的账户</a>中查看和管理订单。</p>
        </body>
        </html>
        ";
        
        $headers = array(
            'Content-Type: text/html; charset=UTF-8',
            'From: ' . get_bloginfo('name') . ' <' . get_option('admin_email') . '>'
        );
        
        wp_mail($order['customer_email'], $subject, $message, $headers);
    }
    
    /**
     * 记录订单操作日志
     */
    private static function log_order_action($order_id, $action, $description) {
        global $wpdb;
        
        $table_logs = $wpdb->prefix . 'cdpda_order_logs';
        
        $wpdb->insert($table_logs, array(
            'order_id' => $order_id,
            'action' => $action,
            'description' => $description,
            'ip_address' => $_SERVER['REMOTE_ADDR'],
            'user_agent' => $_SERVER['HTTP_USER_AGENT'],
            'created_at' => current_time('mysql')
        ));
    }
}
?>

复制

<?php
// 在插件主类中添加短代码注册
private function register_shortcodes() {
    // 产品购买按钮
    add_shortcode('cdpda_buy_button', array($this, 'buy_button_shortcode'));
    
    // 用户订单列表
    add_shortcode('cdpda_my_orders', array($this, 'my_orders_shortcode'));
    
    // 授权验证表单
    add_shortcode('cdpda_license_check', array($this, 'license_check_shortcode'));
}

/**
 * 购买按钮短代码
 */
public function buy_button_shortcode($atts) {
    $atts = shortcode_atts(array(
        'product_id' => 0,
        'text' => '立即购买',
        'class' => 'cdpda-buy-button'
    ), $atts);
    
    if (!$atts['product_id']) {
        return '<p>错误：未指定产品ID</p>';
    }
    
    $product = get_post($atts['product_id']);
    if (!$product || $product->post_type !== 'digital_product') {
        return '<p>错误：产品不存在</p>';
    }
    
    $price = get_post_meta($atts['product_id'], '_cdpda_price', true);
    
    ob_start();
    ?>
    <div class="cdpda-product-widget">
        <h3><?php echo esc_html($product->post_title); ?></h3>
        <p class="price">价格：<?php echo esc_html($price); ?>元</p>
        
        <?php if (is_user_logged_in()): ?>
            <form method="post" action="<?php echo esc_url(home_url('/checkout/')); ?>">
                <?php wp_nonce_field('cdpda_create_order', 'cdpda_order_nonce'); ?>
                <input type="hidden" name="product_id" value="<?php echo esc_attr($atts['product_id']); ?>">
                <button type="submit" name="cdpda_buy_now" class="<?php echo esc_attr($atts['class']); ?>">
                    <?php echo esc_html($atts['text']); ?>
                </button>
            </form>
        <?php else: ?>
            <p>请<a href="<?php echo esc_url(wp_login_url(get_permalink())); ?>">登录</a>后购买</p>
        <?php endif; ?>
    </div>
    <?php
    return ob_get_clean();
}

/**
 * 我的订单短代码
 */
public function my_orders_shortcode() {
    if (!is_user_logged_in()) {
        return '<p>请<a href="' . wp_login_url(get_permalink()) . '">登录</a>后查看订单</p>';
    }
    
    global $wpdb;
    $user_id = get_current_user_id();
    
    $orders = $wpdb->get_results($wpdb->prepare(
        "SELECT o.*, p.post_id 
         FROM {$wpdb->prefix}cdpda_orders o 
         LEFT JOIN {$wpdb->prefix}cdpda_products p ON o.product_id = p.id 
         WHERE o.user_id = %d 
         ORDER BY o.created_at DESC",
        $user_id
    ), ARRAY_A);
    
    ob_start();
    ?>
    <div class="cdpda-my-orders">
        <h2>我的订单</h2>
        
        <?php if (empty($orders)): ?>
            <p>暂无订单</p>
        <?php else: ?>
            <table class="cdpda-orders-table">
                <thead>
                    <tr>
                        <th>订单号</th>
                        <th>产品</th>
                        <th>金额</th>
                        <th>状态</th>
                        <th>下单时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($orders as $order): ?>
                        <tr>
                            <td><?php echo esc_html($order['order_number']); ?></td>
                            <td><?php echo esc_html(get_the_title($order['post_id'])); ?></td>
                            <td><?php echo esc_html($order['amount']); ?>元</td>
                            <td>
                                <span class="order-status status-<?php echo esc_attr($order['status']); ?>">
                                    <?php echo esc_html($order['status']); ?>
                                </span>
                            </td>
                            <td><?php echo esc_html($order['created_at']); ?></td>
                            <td>
                                <?php if ($order['status'] === 'completed'): ?>
                                    <a href="<?php echo esc_url(home_url('/download/?order_id=' . $order['id'])); ?>" 
                                       class="button">下载</a>
                                <?php elseif ($order['status'] === 'pending'): ?>
                                    <a href="<?php echo esc_url(home_url('/checkout/pay/?order_id=' . $order['id'])); ?>" 
                                       class="button">去支付</a>
                                <?php endif; ?>
                            </td>
                        </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        <?php endif; ?>
    </div>
    
    <style>
    .cdpda-orders-table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
    }
    .cdpda-orders-table th,
    .cdpda-orders-table td {
        border: 1px solid #ddd;
        padding: 10px;
        text-align: left;
    }
    .cdpda-orders-table th {
        background-color: #f5f5f5;
    }
    .order-status {
        padding: 3px 8px;
        border-radius: 3px;
        font-size: 12px;
    }
    .status-completed {
        background-color: #d4edda;
        color: #155724;
    }
    .status-pending {
        background-color: #fff3cd;
        color: #856404;
    }
    </style>
    <?php
    return ob_get_clean();
}

/**
 * 授权验证短代码
 */
public function license_check_shortcode() {
    ob_start();
    ?>
    <div class="cdpda-license-check">
        <h2>授权验证</h2>
        <form id="cdpda-license-form" method="post">
            <?php wp_nonce_field('cdpda_check_license', 'cdpda_license_nonce'); ?>
            
            <div class="form-group">
                <label for="license_key">授权密钥：</label>
                <input type="text" id="license_key" name="license_key" 
                       placeholder="输入您的授权密钥" required>