vendor/topthink/framework/src/think/Filesystem.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2019 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think;

use InvalidArgumentException;
use think\filesystem\Driver;
use think\filesystem\driver\Local;
use think\helper\Arr;

/**
 * Class Filesystem
 * @package think
 * @mixin Driver
 * @mixin Local
 */
class Filesystem extends Manager
{
    protected $namespace = '\\think\\filesystem\\driver\\';

    /**
     * @param null|string $name
     * @return Driver
     */
    public function disk(string $name = null): Driver
    {
        return $this->driver($name);
    }

    protected function resolveType(string $name)
    {
        return $this->getDiskConfig($name, 'type', 'local');
    }

    protected function resolveConfig(string $name)
    {
        return $this->getDiskConfig($name);
    }

    /**
     * 获取缓存配置
     * @access public
     * @param null|string $name    名称
     * @param mixed       $default 默认值
     * @return mixed
     */
    public function getConfig(string $name = null, $default = null)
    {
        if (!is_null($name)) {
            return $this->app->config->get('filesystem.' . $name, $default);
        }