WordPress柔性分发插件应用教程：实现内容多渠道智能发布
引言：为什么需要柔性分发插件？
在当今多平台网络传媒环境中，内容创作者经常面临一个挑战：如何高效地将同一内容分发到多个平台？手动复制粘贴不仅耗时耗力，还容易出错。WordPress柔性分发插件正是为解决这一问题而生，它能够实现内容的一次创作、多渠道智能发布，大大提升网络传媒工作效率。
本教程将详细介绍如何使用柔性分发插件，包括安装配置、基本设置、高级功能以及自定义开发，帮助您构建高效的网络传媒分发体系。
一、插件安装与基础配置
1.1 插件安装方法
首先，我们需要在WordPress后台安装柔性分发插件。这里以"Auto Post to Social Media"插件为例（注：实际使用时请根据需求选择合适的插件）：
// 方法一：通过WordPress后台直接安装
// 1. 登录WordPress后台
// 2. 进入"插件" → "安装插件"
// 3. 搜索"Auto Post to Social Media"
// 4. 点击"立即安装"然后"启用"
// 方法二：通过FTP手动安装
// 1. 下载插件ZIP文件
// 2. 解压到wp-content/plugins/目录
// 3. 在WordPress后台启用插件
// 方法三：通过代码自动安装（适用于主题或插件开发者）
function install_flexible_distribution_plugin() {
include_once(ABSPATH . 'wp-admin/includes/plugin-install.php');
include_once(ABSPATH . 'wp-admin/includes/file.php');
include_once(ABSPATH . 'wp-admin/includes/misc.php');
include_once(ABSPATH . 'wp-admin/includes/class-wp-upgrader.php');
$plugin_slug = 'auto-post-to-social-media';
$plugin_zip = 'https://downloads.wordpress.org/plugin/auto-post-to-social-media.latest-stable.zip';
$upgrader = new Plugin_Upgrader();
$installed = $upgrader->install($plugin_zip);
if($installed) {
activate_plugin('auto-post-to-social-media/auto-post-to-social-media.php');
return true;
}
return false;
}
// 注意：此代码需要适当权限和安全措施，建议在开发环境中使用1.2 基础配置步骤
安装完成后，需要进行基础配置：
- 连接社交媒体账号：进入插件设置页面，添加需要分发的平台账号（如微博、微信公众号、知乎、头条号等）
- 设置发布规则：配置触发自动发布的条件（如发布新文章、更新文章等）
- 内容模板设置：定义不同平台的内容格式模板
二、核心功能详解与代码实现
2.1 自动发布功能实现
柔性分发插件的核心是自动发布功能。以下是一个简化的自动发布代码示例：
/**
* 自动发布到多个平台的核心函数
* @param int $post_id 文章ID
* @param array $platforms 目标平台数组
* @return bool 发布结果
*/
function flexible_distribute_post($post_id, $platforms = array()) {
// 安全检查
if (!current_user_can('publish_posts')) {
return false;
}
// 获取文章信息
$post = get_post($post_id);
if (!$post || $post->post_status != 'publish') {
return false;
}
// 获取文章内容
$title = $post->post_title;
$content = $post->post_content;
$excerpt = $post->post_excerpt ?: wp_trim_words($content, 50, '...');
$permalink = get_permalink($post_id);
// 处理特色图片
$thumbnail_url = '';
if (has_post_thumbnail($post_id)) {
$thumbnail_id = get_post_thumbnail_id($post_id);
$thumbnail_url = wp_get_attachment_url($thumbnail_id);
}
// 分发结果数组
$results = array();
// 遍历所有平台进行分发
foreach ($platforms as $platform) {
switch ($platform) {
case 'weibo':
$results['weibo'] = post_to_weibo($title, $content, $permalink, $thumbnail_url);
break;
case 'wechat':
$results['wechat'] = post_to_wechat($title, $excerpt, $content, $thumbnail_url);
break;
case 'zhihu':
$results['zhihu'] = post_to_zhihu($title, $content, $permalink);
break;
case 'toutiao':
$results['toutiao'] = post_to_toutiao($title, $content, $thumbnail_url);
break;
default:
$results[$platform] = false;
}
// 添加延迟，避免请求过于频繁
sleep(1);
}
// 记录分发日志
log_distribution_results($post_id, $results);
// 返回分发结果
return !in_array(false, $results, true);
}
/**
* 发布到微博的示例函数
*/
function post_to_weibo($title, $content, $link, $image_url = '') {
// 微博API配置（实际使用中应从设置中获取）
$weibo_config = get_option('flexible_distribution_weibo_settings');
// 构建微博内容（微博有字数限制）
$weibo_content = $title . " " . $link;
if (strlen($weibo_content) > 140) {
$weibo_content = mb_substr($title, 0, 100, 'UTF-8') . "... " . $link;
}
// 调用微博API（这里简化处理，实际需要完整的OAuth认证）
$api_url = 'https://api.weibo.com/2/statuses/share.json';
// 实际开发中这里需要完整的API调用代码
// $response = wp_remote_post($api_url, $args);
// 返回模拟结果
return array(
'success' => true,
'message' => '已发布到微博',
'platform' => 'weibo',
'time' => current_time('mysql')
);
}2.2 内容模板系统
不同平台对内容格式有不同要求，柔性分发插件通常提供模板系统：
/**
* 内容模板管理器
*/
class ContentTemplateManager {
private $templates = array();
public function __construct() {
$this->load_default_templates();
}
/**
* 加载默认模板
*/
private function load_default_templates() {
$this->templates = array(
'weibo' => array(
'name' => '微博模板',
'template' => '{标题} {摘要} {链接} #{标签}',
'max_length' => 140
),
'wechat' => array(
'name' => '微信公众号模板',
'template' => "# {标题}nn{内容}nn原文链接：{链接}",
'max_length' => 2000
),
'zhihu' => array(
'name' => '知乎模板',
'template' => "## {标题}nn{内容}nn---n*本文同步自[{博客名称}]({博客链接})*",
'max_length' => 40000
)
);
}
/**
* 应用模板生成内容
*/
public function apply_template($platform, $data) {
if (!isset($this->templates[$platform])) {
return $data['content'];
}
$template = $this->templates[$platform]['template'];
$max_length = $this->templates[$platform]['max_length'];
// 替换模板变量
$content = str_replace(
array('{标题}', '{内容}', '{摘要}', '{链接}', '{博客名称}', '{博客链接}', '{标签}'),
array(
$data['title'],
$data['content'],
$data['excerpt'],
$data['link'],
get_bloginfo('name'),
get_bloginfo('url'),
$this->generate_tags($data['categories'])
),
$template
);
// 检查长度限制
if (mb_strlen($content, 'UTF-8') > $max_length) {
$content = mb_substr($content, 0, $max_length - 3, 'UTF-8') . '...';
}
return $content;
}
/**
* 生成标签
*/
private function generate_tags($categories) {
$tags = array();
foreach ($categories as $category) {
$tags[] = '#' . $category->name;
}
return implode(' ', $tags);
}
}三、高级功能与自定义开发
3.1 条件分发规则
高级分发插件通常支持条件分发，例如根据文章分类、标签或自定义字段决定是否分发到特定平台：
/**
* 条件分发规则检查器
*/
class ConditionalDistributionChecker {
/**
* 检查文章是否符合分发条件
*/
public function check_post_conditions($post_id, $platform) {
$post = get_post($post_id);
$conditions = get_option('flexible_distribution_conditions', array());
// 如果没有设置该平台的条件，默认允许分发
if (!isset($conditions[$platform])) {
return true;
}
$platform_conditions = $conditions[$platform];
// 检查分类条件
if (isset($platform_conditions['categories']) && !empty($platform_conditions['categories'])) {
$post_categories = wp_get_post_categories($post_id, array('fields' => 'ids'));
$allowed_categories = $platform_conditions['categories'];
if (count(array_intersect($post_categories, $allowed_categories)) === 0) {
return false;
}
}
// 检查标签条件
if (isset($platform_conditions['tags']) && !empty($platform_conditions['tags'])) {
$post_tags = wp_get_post_tags($post_id, array('fields' => 'ids'));
$allowed_tags = $platform_conditions['tags'];
if (count(array_intersect($post_tags, $allowed_tags)) === 0) {
return false;
}
}
// 检查自定义字段条件
if (isset($platform_conditions['custom_fields']) && !empty($platform_conditions['custom_fields'])) {
foreach ($platform_conditions['custom_fields'] as $field => $value) {
$post_field_value = get_post_meta($post_id, $field, true);
if ($post_field_value != $value) {
return false;
}
}
}
return true;
}
/**
* 获取符合条件的平台列表
*/
public function get_eligible_platforms($post_id) {
$all_platforms = array('weibo', 'wechat', 'zhihu', 'toutiao');
$eligible_platforms = array();
foreach ($all_platforms as $platform) {
if ($this->check_post_conditions($post_id, $platform)) {
$eligible_platforms[] = $platform;
}
}
return $eligible_platforms;
}
}3.2 分发日志与错误处理
完善的日志系统对于分发插件至关重要：
/**
* 分发日志管理器
*/
class DistributionLogger {
private $log_table;
public function __construct() {
global $wpdb;
$this->log_table = $wpdb->prefix . 'distribution_logs';
}
/**
* 记录分发日志
*/
public function log_distribution($post_id, $platform, $status, $message = '', $response_data = '') {
global $wpdb;
$data = array(
'post_id' => $post_id,
'platform' => $platform,
'status' => $status, // success, error, warning
'message' => $message,
'response_data' => maybe_serialize($response_data),
'distribution_time' => current_time('mysql'),
'user_id' => get_current_user_id()
);
$wpdb->insert($this->log_table, $data);
return $wpdb->insert_id;
}
/**
* 获取文章的分发日志
*/
public function get_post_logs($post_id, $limit = 10) {
global $wpdb;
$query = $wpdb->prepare(
"SELECT * FROM {$this->log_table} WHERE post_id = %d ORDER BY distribution_time DESC LIMIT %d",
$post_id,
$limit
);
return $wpdb->get_results($query);
}
/**
* 创建日志表（插件激活时调用）
*/
public function create_log_table() {
global $wpdb;
$charset_collate = $wpdb->get_charset_collate();
$sql = "CREATE TABLE IF NOT EXISTS {$this->log_table} (
id bigint(20) NOT NULL AUTO_INCREMENT,
post_id bigint(20) NOT NULL,
platform varchar(50) NOT NULL,
status varchar(20) NOT NULL,
message text,
response_data longtext,
distribution_time datetime DEFAULT '0000-00-00 00:00:00' NOT NULL,
user_id bigint(20),
PRIMARY KEY (id),
KEY post_id (post_id),
KEY platform (platform),
KEY distribution_time (distribution_time)
) $charset_collate;";
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);
}
}四、最佳实践与优化建议
4.1 性能优化策略
- 异步处理分发任务：对于大量内容分发，建议使用WP Cron或消息队列异步处理
- 缓存API令牌：合理缓存社交媒体API访问令牌，减少认证请求
- 批量处理：支持批量文章分发，提高效率
4.2 安全注意事项
- API密钥安全存储：使用WordPress选项加密API密钥
- 权限验证：严格验证用户权限，防止未授权分发
- 输入过滤：对所有输入数据进行过滤和验证
4.3 故障排除
- API限制处理：处理社交媒体平台的API调用频率限制
- 网络异常处理：添加重试机制处理网络异常
- 内容格式兼容性：确保内容符合各平台格式要求
结语
WordPress柔性分发插件是网络传媒平台内容分发的强大工具。通过合理配置和适当定制，可以构建高效、智能的内容分发系统，实现"一次创作，多渠道发布"的工作流程。本教程提供了从基础配置到高级开发的完整指南，希望能帮助您更好地利用这一工具提升工作效率。
随着社交媒体平台的不断变化，建议定期更新插件和API集成方式，保持分发系统的稳定性和兼容性。同时，根据实际运营数据不断优化分发策略，实现内容传播效果的最大化。
WordPress柔性分发插件应用教程（续）：高级配置与实战案例
四、多平台API集成实战
4.1 主流社交媒体API集成
现代柔性分发插件需要支持多种社交媒体平台。以下是几个主流平台的API集成示例：
/**
* 多平台API集成管理器
*/
class MultiPlatformAPIManager {
private $platform_clients = array();
public function __construct() {
// 初始化各平台客户端
$this->init_clients();
}
private function init_clients() {
// 从数据库获取各平台配置
$platform_configs = get_option('flexible_distribution_platform_configs', array());
foreach ($platform_configs as $platform => $config) {
switch ($platform) {
case 'weibo':
$this->platform_clients[$platform] = new WeiboClient($config);
break;
case 'wechat_mp':
$this->platform_clients[$platform] = new WeChatMPClient($config);
break;
case 'zhihu':
$this->platform_clients[$platform] = new ZhihuClient($config);
break;
case 'toutiao':
$this->platform_clients[$platform] = new ToutiaoClient($config);
break;
case 'bilibili':
$this->platform_clients[$platform] = new BilibiliClient($config);
break;
case 'xiaohongshu':
$this->platform_clients[$platform] = new XiaohongshuClient($config);
break;
}
}
}
/**
* 微信公众号API客户端示例
*/
class WeChatMPClient {
private $app_id;
private $app_secret;
private $access_token;
public function __construct($config) {
$this->app_id = $config['app_id'];
$this->app_secret = $config['app_secret'];
$this->refresh_access_token();
}
/**
* 刷新访问令牌
*/
private function refresh_access_token() {
$transient_key = 'wechat_mp_access_token_' . $this->app_id;
$access_token = get_transient($transient_key);
if (false === $access_token) {
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$this->app_id}&secret={$this->app_secret}";
$response = wp_remote_get($url);
if (!is_wp_error($response)) {
$body = json_decode(wp_remote_retrieve_body($response), true);
if (isset($body['access_token'])) {
$access_token = $body['access_token'];
// 缓存令牌，提前5分钟过期
set_transient($transient_key, $access_token, $body['expires_in'] - 300);
}
}
}
$this->access_token = $access_token;
return $access_token;
}
/**
* 发布文章到微信公众号
*/
public function publish_article($article_data) {
$url = "https://api.weixin.qq.com/cgi-bin/material/add_news?access_token={$this->access_token}";
// 构建微信公众号文章格式
$post_data = array(
'articles' => array(
array(
'title' => $article_data['title'],
'thumb_media_id' => $this->upload_image($article_data['thumbnail']),
'author' => $article_data['author'],
'digest' => mb_substr(strip_tags($article_data['content']), 0, 120, 'UTF-8'),
'show_cover_pic' => 1,
'content' => $this->format_wechat_content($article_data['content']),
'content_source_url' => $article_data['source_url']
)
)
);
$args = array(
'body' => json_encode($post_data, JSON_UNESCAPED_UNICODE),
'headers' => array('Content-Type' => 'application/json'),
'timeout' => 30
);
$response = wp_remote_post($url, $args);
return $this->handle_response($response);
}
/**
* 格式化微信公众号内容
*/
private function format_wechat_content($content) {
// 移除不支持的HTML标签
$content = strip_tags($content, '<p><br><h1><h2><h3><h4><strong><em><ul><ol><li><blockquote><img><a>');
// 图片处理
$content = preg_replace_callback(
'/<img[^>]+src="([^">]+)"[^>]*>/',
function($matches) {
$image_url = $matches[1];
$media_id = $this->upload_image($image_url);
return $media_id ? "<img src='{$media_id}' />" : '';
},
$content
);
return $content;
}
}
}4.2 异步任务队列实现
对于大量内容分发，使用异步任务队列可以显著提升性能：
/**
* 异步分发任务队列
*/
class AsyncDistributionQueue {
private $queue_table;
public function __construct() {
global $wpdb;
$this->queue_table = $wpdb->prefix . 'distribution_queue';
}
/**
* 添加分发任务到队列
*/
public function add_task($post_id, $platforms, $priority = 'normal') {
global $wpdb;
$task_data = array(
'post_id' => $post_id,
'platforms' => maybe_serialize($platforms),
'status' => 'pending',
'priority' => $priority,
'attempts' => 0,
'created_at' => current_time('mysql'),
'scheduled_for' => current_time('mysql')
);
return $wpdb->insert($this->queue_table, $task_data);
}
/**
* 处理队列中的任务
*/
public function process_queue($limit = 10) {
global $wpdb;
// 获取待处理任务
$tasks = $wpdb->get_results(
$wpdb->prepare(
"SELECT * FROM {$this->queue_table}
WHERE status IN ('pending', 'failed')
AND scheduled_for <= %s
AND attempts < %d
ORDER BY
CASE priority
WHEN 'high' THEN 1
WHEN 'normal' THEN 2
WHEN 'low' THEN 3
END,
created_at ASC
LIMIT %d",
current_time('mysql'),
3, // 最大重试次数
$limit
)
);
foreach ($tasks as $task) {
$this->process_single_task($task);
}
}
/**
* 处理单个任务
*/
private function process_single_task($task) {
global $wpdb;
// 更新任务状态为处理中
$wpdb->update(
$this->queue_table,
array('status' => 'processing', 'started_at' => current_time('mysql')),
array('id' => $task->id)
);
try {
$platforms = maybe_unserialize($task->platforms);
$result = flexible_distribute_post($task->post_id, $platforms);
if ($result) {
// 任务成功
$wpdb->update(
$this->queue_table,
array(
'status' => 'completed',
'completed_at' => current_time('mysql'),
'result_data' => maybe_serialize($result)
),
array('id' => $task->id)
);
} else {
// 任务失败
$this->handle_failed_task($task);
}
} catch (Exception $e) {
// 异常处理
$this->handle_failed_task($task, $e->getMessage());
}
}
/**
* 处理失败任务
*/
private function handle_failed_task($task, $error_message = '') {
global $wpdb;
$attempts = $task->attempts + 1;
if ($attempts >= 3) {
// 达到最大重试次数，标记为失败
$wpdb->update(
$this->queue_table,
array(
'status' => 'failed',
'attempts' => $attempts,
'error_message' => $error_message,
'failed_at' => current_time('mysql')
),
array('id' => $task->id)
);
} else {
// 重新调度任务（指数退避）
$delay = pow(2, $attempts) * 300; // 300, 600, 1200秒
$scheduled_for = date('Y-m-d H:i:s', strtotime("+{$delay} seconds"));
$wpdb->update(
$this->queue_table,
array(
'status' => 'pending',
'attempts' => $attempts,
'scheduled_for' => $scheduled_for,
'error_message' => $error_message
),
array('id' => $task->id)
);
}
}
/**
* 创建任务队列表
*/
public function create_queue_table() {
global $wpdb;
$charset_collate = $wpdb->get_charset_collate();
$sql = "CREATE TABLE IF NOT EXISTS {$this->queue_table} (
id bigint(20) NOT NULL AUTO_INCREMENT,
post_id bigint(20) NOT NULL,
platforms text NOT NULL,
status varchar(20) NOT NULL DEFAULT 'pending',
priority varchar(20) NOT NULL DEFAULT 'normal',
attempts int(11) NOT NULL DEFAULT 0,
result_data longtext,
error_message text,
created_at datetime DEFAULT '0000-00-00 00:00:00' NOT NULL,
scheduled_for datetime DEFAULT '0000-00-00 00:00:00' NOT NULL,
started_at datetime,
completed_at datetime,
failed_at datetime,
PRIMARY KEY (id),
KEY status (status),
KEY priority (priority),
KEY scheduled_for (scheduled_for),
KEY post_id_status (post_id, status)
) $charset_collate;";
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);
}
}五、智能分发策略与算法
5.1 基于内容分析的智能分发
/**
* 智能分发策略引擎
*/
class IntelligentDistributionEngine {
/**
* 分析内容并推荐分发平台
*/
public function analyze_and_recommend($post_id) {
$post = get_post($post_id);
$content = $post->post_content;
$title = $post->post_title;
// 内容特征分析
$features = $this->analyze_content_features($content);
// 平台匹配度计算
$platform_scores = $this->calculate_platform_scores($features);
// 历史表现调整
$platform_scores = $this->adjust_by_history($post_id, $platform_scores);
// 返回推荐平台
return $this->get_recommended_platforms($platform_scores);
}
/**
* 分析内容特征
*/
private function analyze_content_features($content) {
$features = array(
'length' => mb_strlen(strip_tags($content), 'UTF-8'),
'has_images' => preg_match('/<img[^>]+>/i', $content) ? 1 : 0,
'image_count' => preg_match_all('/<img[^>]+>/i', $content, $matches),
'has_videos' => preg_match('/(youtube|vimeo|bilibili)/i', $content) ? 1 : 0,
'paragraph_count' => substr_count($content, '</p>'),
'link_count' => preg_match_all('/<a[^>]+>/i', $content, $matches),
'readability_score' => $this->calculate_readability($content),
'keyword_density' => $this->analyze_keywords($content)
);
return $features;
}
/**
* 计算平台匹配度
*/
private function calculate_platform_scores($features) {
// 平台特征权重配置
$platform_weights = array(
'weibo' => array(
'length' => array('optimal' => 140, 'weight' => 0.3),
'has_images' => array('optimal' => 1, 'weight' => 0.4),
'readability_score' => array('optimal' => 70, 'weight' => 0.3)
),
'wechat_mp' => array(
'length' => array('optimal' => 1500, 'weight' => 0.2),
'has_images' => array('optimal' => 1, 'weight' => 0.3),
'image_count' => array('optimal' => 3, 'weight' => 0.2),
'readability_score' => array('optimal' => 75, 'weight' => 0.3)
),
'zhihu' => array(
'length' => array('optimal' => 2000, 'weight' => 0.25),
'paragraph_count' => array('optimal' => 10, 'weight' => 0.25),
'readability_score' => array('optimal' => 80, 'weight' => 0.5)
),
'toutiao' => array(
'length' => array('optimal' => 800, 'weight' => 0.2),
'has_images' => array('optimal' => 1, 'weight' => 0.4),
'keyword_density' => array('optimal' => 0.03, 'weight' => 0.4)
)
);
$scores = array();
foreach ($platform_weights as $platform => $weights) {
$score = 0;
$total_weight = 0;
foreach ($weights as $feature => $config) {
if (isset($features[$feature])) {
$feature_value = $features[$feature];
$optimal_value = $config['optimal'];
$weight = $config['weight'];
// 计算特征匹配度（0-1之间）
if ($feature == 'has_images' || $feature == 'has_videos') {
$feature_score = ($feature_value == $optimal_value) ? 1 : 0;
} else {
$feature_score = 1 - min(abs($feature_value - $optimal_value) / $optimal_value, 1);
}
$score += $feature_score * $weight;
$total_weight += $weight;
}
}
if ($total_weight > 0) {
$scores[$platform] = $score / $total_weight;
}
}
return $scores;
}
/**
* 根据历史表现调整分数
*/
private function adjust_by_history($post_id, $platform_scores) {
global $wpdb;
// 获取相似文章的历史表现
$categories = wp_get_post_categories($post_id, array('fields' => 'ids'));
if (empty($categories)) {
return $platform_scores;
}
$category_list = implode(',', array_map('intval', $categories));
$query = "
SELECT platform,
AVG(CASE WHEN status = 'success' THEN 1 ELSE 0 END) as success_rate,
AVG(engagement_score) as avg_engagement
FROM {$wpdb->prefix}distribution_performance
WHERE category_id IN ({$category_list})
AND date >= DATE_SUB(NOW(), INTERVAL 30 DAY)
GROUP BY platform
";
$history_data = $wpdb->get_results($query);
// 根据历史表现调整分数
foreach ($history_data as $data) {
if (isset($platform_scores[$data->platform])) {
$adjustment_factor = ($data->success_rate * 0.6) + ($data->avg_engagement * 0.4);
$platform_scores[$data->platform] *= $adjustment_factor;
}
}
return $platform_scores;
}
}5.2 A/B测试与优化
/**
* A/B测试管理器
*/
class ABTestManager {
/**
* 创建A/B测试
*/
public function create_ab_test($post_id, $variations) {
$test_id = wp_generate_uuid4();
$test_data = array(
'test_id' => $test_id,
'post_id' => $post_id,
'variations' => $variations,
'status' => 'running',
'created_at' => current_time('mysql'),
'traffic_allocation' => array_fill_keys(array_keys($variations), 1/count($variations))
);
update_post_meta($post_id, '_ab_test_' . $test_id, $test_data);
return $test_id;
}
/**
* 获取测试变体
*/
public function get_variation_for_user($test_id, $user_id = null) {
if (!$user_id) {
$user_id = get_current_user_id();
}
$test_data = $this->get_test_data($test_id);
if (!$test_data || $test_data['status'] != 'running') {
return 'control'; // 默认返回控制组
}
// 使用一致性哈希确保用户始终看到同一变体
$hash = crc32($user_id . $test_id);
$slot = $hash % 100;
$cumulative = 0;
foreach ($test_data['traffic_allocation'] as $variation => $allocation) {