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

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2021 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think;

use ArrayAccess;
use think\facade\Lang;
use think\file\UploadedFile;
use think\route\Rule;

/**
 * 请求管理类
 * @package think
 */
class Request implements ArrayAccess
{
    /**
     * 兼容PATH_INFO获取
     * @var array
     */
    protected $pathinfoFetch = ['ORIG_PATH_INFO', 'REDIRECT_PATH_INFO', 'REDIRECT_URL'];

    /**
     * PATHINFO变量名 用于兼容模式
     * @var string
     */
    protected $varPathinfo = 's';

    /**
     * 请求类型
     * @var string
     */
    protected $varMethod = '_method';

    /**
     * 表单ajax伪装变量
     * @var string
     */
    protected $varAjax = '_ajax';

    /**
     * 表单pjax伪装变量
     * @var string
     */
    protected $varPjax = '_pjax';

    /**
     * 域名根
     * @var string
     */
    protected $rootDomain = '';