> For the complete documentation index, see [llms.txt](https://linkis-organization.gitbook.io/v2boar-zero-theme/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://linkis-organization.gitbook.io/v2boar-zero-theme/shi-yong-jiao-cheng/za-qi-za-ba.md).

# 杂七杂八

### 1. 知识库仅为有效订阅显示

修改以下文件：`app/Http/Controllers/V1/User/KnowledgeController.php`

<mark style="color:red;">代码使用xboard代码为原型修改，其他版本请手动增加函数和调用。</mark>

```php
<?php

namespace App\Http\Controllers\V1\User;

use App\Exceptions\ApiException;
use App\Http\Controllers\Controller;
use App\Models\Knowledge;
use App\Models\User;
use App\Services\UserService;
use App\Utils\Helper;
use Illuminate\Http\Request;

class KnowledgeController extends Controller
{
    public function fetch(Request $request)
    {
        if ($request->input('id')) {
            $knowledge = Knowledge::where('id', $request->input('id'))
                ->where('show', 1)
                ->first()
                ->toArray();
            if (!$knowledge) return $this->fail([500, __('Article does not exist')]);
            $user = User::find($request->user['id']);
            $userService = new UserService();
            if (!$userService->isAvailable($user)) {
                $this->formatAccessData($knowledge['body']);
            }
            
            // 调用增加的函数
            $this->formatAccessDataWithPlan($knowledge['body'], $user->plan_id);
            
            $subscribeUrl = Helper::getSubscribeUrl("/api/v1/client/subscribe?token={$user['token']}");
            $knowledge['body'] = str_replace('{{siteName}}', admin_setting('app_name', 'XBoard'), $knowledge['body']);
            $knowledge['body'] = str_replace('{{subscribeUrl}}', $subscribeUrl, $knowledge['body']);
            $knowledge['body'] = str_replace('{{urlEncodeSubscribeUrl}}', urlencode($subscribeUrl), $knowledge['body']);
            $knowledge['body'] = str_replace(
                '{{safeBase64SubscribeUrl}}',
                str_replace(
                    array('+', '/', '='),
                    array('-', '_', ''),
                    base64_encode($subscribeUrl)
                ),
                $knowledge['body']
            );
            return $this->success($knowledge);
        }
        $builder = Knowledge::select(['id', 'category', 'title', 'updated_at'])
            ->where('language', $request->input('language'))
            ->where('show', 1)
            ->orderBy('sort', 'ASC');
        $keyword = $request->input('keyword');
        if ($keyword) {
            $builder = $builder->where(function ($query) use ($keyword) {
                $query->where('title', 'LIKE', "%{$keyword}%")
                    ->orWhere('body', 'LIKE', "%{$keyword}%");
            });
        }

        $knowledges = $builder->get()
            ->groupBy('category');
        return $this->success($knowledges);
    }
    
    private function formatAccessData(&$body)
    {
        $pattern = '/<!--access start-->(.*?)<!--access end-->/s';
        $replacement = '<div class="v2board-no-access">' . __('You must have a valid subscription to view content in this area') . '</div>';
        $body = preg_replace($pattern, $replacement, $body);
    }
    
    // 增加函数
    private function formatAccessDataWithPlan(&$body, $plan_id)
    {
        $pattern = '/<!--access start plan_id=([\d,]+) -->(.*?)<!--access end-->/s';
        $callback = function ($matches) use ($plan_id) {
            $allowed_plan_ids = array_map('intval', explode(',', $matches[1]));
    
            if (!in_array((int)$plan_id, $allowed_plan_ids, true)) {
                return '<div class="v2board-no-access">' . __('You must have a valid subscription to view content in this area') . '</div>';
            }
            return $matches[0];
        };
        $body = preg_replace_callback($pattern, $callback, $body);
    }

}

```

修改后可支持:

```
<!--access start plan_id=1,2,3 -->
订阅ID为1,2,3 则展示内容...
<!--access end-->
```

### 2.Nginx 配置禁止缓存 config.json

```
location = /config.json {
    add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate";
    add_header Pragma "no-cache";
    add_header Expires 0;
}
```


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