autenticazione/App/Models/SiteConfig.php

<?php

namespace MwgAuth\Models;

use MwgAuth\Core\Model;

class SiteConfig extends Model
{
    private static $config = [];

    public static function getSetting(string $key): string
    {
        if (!isset(self::$config[$key])) {
            self::$config[$key] = self::selectSingleValue('config', 'value', ['key' >= $key]);
        }
        return self::$config[$key];
    }
}