升级上传文件操作

文档 

已更改内容 

文件上传的功能已经发生了很大变化。现在，您可以检查文件是否已成功上传，而移动/存储文件也变得更加简单。

升级指南 

在 CI4 中，您可以使用 $file = $this->request->getFile('userfile') 访问上传的文件。您可以使用 $file->isValid() 验证文件是否已成功上传。要存储文件，您可以使用 $path = $this->request->getFile('userfile')->store('head_img/', 'user_name.jpg');。这会将文件存储在 writable/uploads/head_img/user_name.jpg 中。

您必须更改文件上传代码以匹配新方法。

代码示例
CodeIgniter 版本 3.x<?php

class Upload extends CI_Controller {

    public function __construct()
    {
        parent::__construct();
        $this->load->helper(array('form', 'url'));
    }

    public function index()
    {
        $this->load->view('upload_form', array('error' => ' ' ));
    }

    public function do_upload()
    {
        $config['upload_path']   = './uploads/';
        $config['allowed_types'] = 'png|jpg|gif';
        $config['max_size']      = 100;
        $config['max_width']     = 1024;
        $config['max_height']    = 768;

        $this->load->library('upload', $config);

        if (! $this->upload->do_upload('userfile')) {
            $error = array('error' => $this->upload->display_errors());

            $this->load->view('upload_form', $error);
        } else {
            $data = array('upload_data' => $this->upload->data());

            $this->load->view('upload_success', $data);
        }
    }
}

CodeIgniter 版本 4.x<?php

namespace App\Controllers;

class Upload extends BaseController
{
    public function index()
    {
        return view('upload_form', ['error' => ' ']);
    }

    public function do_upload()
    {
        $this->validate([
            'userfile' => [
                'uploaded[userfile]',
                'max_size[userfile,100]',
                'mime_in[userfile,image/png,image/jpg,image/gif]',
                'ext_in[userfile,png,jpg,gif]',
                'max_dims[userfile,1024,768]',
            ],
        ]);

        $file = $this->request->getFile('userfile');

        if (! $path = $file->store()) {
            return view('upload_form', ['error' => 'upload failed']);
        }
        $data = ['upload_file_path' => $path];

        return view('upload_success', $data);
    }
}