vendor/topthink/framework/src/think/file/UploadedFile.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: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think\file;

use think\exception\FileException;
use think\File;

class UploadedFile extends File
{

    private $test = false;
    private $originalName;
    private $mimeType;
    private $error;

    public function __construct(string $path, string $originalName, string $mimeType = null, int $error = null, bool $test = false)
    {
        $this->originalName = $originalName;
        $this->mimeType     = $mimeType ?: 'application/octet-stream';
        $this->test         = $test;
        $this->error        = $error ?: UPLOAD_ERR_OK;

        parent::__construct($path, UPLOAD_ERR_OK === $this->error);
    }

    public function isValid(): bool
    {
        $isOk = UPLOAD_ERR_OK === $this->error;

        return $this->test ? $isOk : $isOk && is_uploaded_file($this->getPathname());
    }

    /**
     * 上传文件
     * @access public
     * @param string      $directory 保存路径
     * @param string|null $name      保存的文件名
     * @return File
     */
    public function move(string $directory, string $name = null): File
    {
        if ($this->isValid()) {
            if ($this->test) {
                return parent::move($directory, $name);
            }

            $target = $this->getTargetFile($directory, $name);

            set_error_handler(function ($type, $msg) use (&$error) {
                $error = $msg;