Xboard/app/Helpers/Functions.php

<?php
use App\Support\Setting;
use Illuminate\Support\Facades\App;

if (! function_exists('admin_setting')) {
    /**
     * 获取或保存配置参数.
     *
     * @param  string|array  $key
     * @param  mixed  $default
     * @return App\Support\Setting|mixed
     */
    function admin_setting($key = null, $default = null)
    {
        $setting = Setting::getInstance();
        
        if ($key === null) {
            return $setting->toArray();
        }

        if (is_array($key)) {
            $setting->save($key);
            return '';
        }
        
        $default = config('v2board.'. $key) ?? $default;
        return $setting->get($key) ?? $default;
    }
}

if (! function_exists('admin_settings_batch')) {
    /**
     * 批量获取配置参数，性能优化版本
     *
     * @param array $keys 配置键名数组
     * @return array 返回键值对数组
     */
    function admin_settings_batch(array $keys): array
    {
        return Setting::getInstance()->getBatch($keys);
    }
}