Php codeigniter上载类的问题

我在我的上传控制器中的do_upload函数中加载上传库：

public function do_upload() {
    $upload_path_url = base_url() . 'uploads/';
    $config['upload_path'] = FCPATH . 'uploads/';
    $config['allowed_types'] = 'jpg|jpeg|png|gif';
    $config['max_size'] = '30000';

    // Here i loaded the library
    $this->load->library('upload', $config);

        // Here is the undefined $upload variable
        if (!$this->upload->do_upload()) {
        // code
        }
    // code
    }

我得到这个错误：

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Upload::$upload

Filename: controllers/Upload.php

Line Number: 24

Backtrace:

File: /var/www/application/controllers/Upload.php
Line: 24
Function: _exception_handler

File: /var/www/index.php
Line: 274
Function: require_once

---

如何解决此问题？

请提及您上传文件的输入名称，如下所示：

// Here is the undefined $upload variable
        if (!$this->upload->do_upload('input_name')) { // here you have to mention input name
        // code
        }

---

我认为这应该适合你。

更改$config['upload\u path']=$upload\u path\u url和$this->upload->do\u upload'image'；不起作用：我不明白问题所在：/no它不起作用，因为upload变量在第24行不存在$此->上传->不上传；我通过带有blueim jquery插件的ayax请求此函数。蓝色imp jquery wiki中有一个代码示例：