Core_Config::reload

public function reload($from_db=true, $type = '')
{
    $tmpfile = $this->get_config_cache_file(Core::$project, $type);

    if ($this->is_use_cache && !$from_db && is_file($tmpfile))
    {
        # 在data目录中直接读取
        $this->config[$type] = @unserialize(file_get_contents($tmpfile));
        if (!is_array($this->config[$type]))
        {
            $this->config[$type] = array();
        }
    }
    else
    {
        # 没有缓存数据，则直接在数据库里获取
        $db = new Database($this->database);
        $config = $db->from($this->tablename)->where('type', $type)->get(false, true)->as_array();

        if ($config)
        {
            $this->config = array();
            foreach ($config as $item)
            {
                $this->config[$item['type']][$item['key_name']] = $this->data_unformat($item['value']);
            }
        }
        else
        {
            $this->config = array
            (
                $type => array(),
            );
        }

        if ($this->is_use_cache)
        {
            // 普通模式下写缓存
            $rs = File::create_file($tmpfile, serialize($this->config));

            if (IS_DEBUG)Core::debug()->log('save extends config cache ' . ($rs?'success':'fail').'.');
        }
    }
}