Codeigniter upload error - codeigniter

Question

Please help me! I want to upload a file with codeigniter, but this return to error. This is the uploader:
class Uploader extends CI_Model
{
function __construct()
{
parent::__construct();
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png|exe|xls|doc|docx|xlsx|rar|zip';
$config['max_size'] = '8192'; // kbytes
$config['encrypt_name'] = TRUE;
$this->load->library( 'upload', $config );
$this->response = '';
$this->success = TRUE;
}
/**
* Triggers upload
* returns the file's details on success or false
*/
function upload( $field_name )
{
if ( !$this->upload->do_upload( $field_name ) )
{
$this->success = FALSE;
$this->response = $this->upload->display_errors();
return false;
}
else
{
$this->success = TRUE;
$this->response = $this->upload->data();
return $this->response['file_name'];
}
}
}
And this is the error message:
A PHP Error was encountered
Severity: Notice
Message: Undefined property: Downloads::$required_empty
Filename: core/Model.php
Line Number: 51
The autoload database config is on. Please help me.

Answer 1

try this
if($this->input->post())
{
$file_element_name = 'image'; //this is the name of your input file. for example "image"
if ($_FILES['image']['name']!= "")
{
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png|exe|xls|doc|docx|xlsx|rar|zip';
$config['max_size'] = '8192';
$config['remove_spaces']=TRUE; //it will remove all spaces
$config['encrypt_name']=TRUE; //it wil encrypte the original file name
$this->load->library('upload', $config);
if (!$this->upload->do_upload($file_element_name))
{
$error = array('error' => $this->upload->display_errors());
$this->session->set_flashdata('error',$error['error']);
redirect('controller_name/function_name','refresh');
}
else
{
$data = $this->upload->data();
return $data['file_name'];
}
$this->session->set_flashdata('msg','success message');
redirect('controller_name/function_name','refresh');
}
else
{
//if no file uploaded the do stuff here
}
}
please let me know if you face any problem.

Answer 2

have you tried something like this
<?php
class Upload extends CI_Controller {
function __construct()
{
parent::__construct();
$this->load->helper(array('form', 'url'));
}
function index()
{
$this->load->view('upload_form', array('error' => ' ' ));
}
function do_upload()
{
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '100';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload())
{
$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);
}
}
}
?>
you can get more here http://ellislab.com/codeigniter/user-guide/libraries/file_uploading.html
The Upload Folder
You'll need a destination folder for your uploaded images. Create a
folder at the root of your CodeIgniter installation called uploads and
set its file permissions to 777.