在codeigniter图像上传中未定义索引PIC - undefined index pic in codeigniter image upload

undefined index pic in codeigniter image upload

嘿，伙计，我正试图在codeingniter中上传图像，但它一直给我这样的错误

A PHP Error was encountered
Severity: Notice
Message: Undefined index: pic
Filename: controllers/dou.php
Line Number: 7

My Upload view

<!DOCTYPE html>
<html>
<head>
    <title>Upload form</title>
</head>
<body>
<?php echo form_open('dou/upload');?>
<?php echo form_upload('pic'); ?>
    <?php echo form_submit('submit','Save');?>
<?php echo form_close();?>
</body>
</html>

我的控制器

<?php 
    class DoU extends XM_Controller {
        public function index(){
            $this->load->view('upload_view1',array('error' => ''));
        }
        public function upload(){
            if(is_uploaded_file($_FILES['pic']['tem_nam'])) {
                move_uploaded_file($_FILES['pic']['tem_nam'], './assets'.$_FILES['pic']['name']);
            }
        }
    }

任何帮助都将是感激的。

我已经尝试打印数组"$_FILES"，但它完全是空的我做错了什么?

你应该使用:

form_open_multipart()

函数，因为你有文件上传。

From documents: https://ellislab.com/codeigniter/user-guide/helpers/form_helper.html(在CI3中也是实际的)