Trying to get file_name from codeigniter after uploading - php

Question

What I am trying to do is after uploading the file parse the cvs file to the screen with print_r so I can do some things with it. I cannot seem to figure out how you access the file name with the $data. I have tried several things like $file_name, $data['file_name], and $this->data->$file_name. The relevant part is on line 37.
Not sure what I am doing wrong. I have looked at the code igniter documentation for the uploader library but it doesn't be sufficient to answer my question. Thanks for any help!
<?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'] = 'csv';
$config['max_size'] = '100';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->load->library('upload', $config);
$this->load->library('getcsv');
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', $data);
echo 'The file name is: '.$file_name;
}
}
}
?>

Answer 1

The filename can be anything you want. This is clearly in the documentation, you might've been reading the wrong page or something:
http://ellislab.com/codeigniter%20/user-guide/libraries/file_uploading.html
file_name: If set CodeIgniter will rename the uploaded file to this name. The extension provided in the file name must also be an allowed file type.
OR:
You can get it from $this->upload->data(), which is an array.
$this->upload->data()
This is a helper function that returns an array containing all of the data related to the file you uploaded. Here is the array prototype:
Array
(
[file_name] => mypic.jpg
[file_type] => image/jpeg
[file_path] => /path/to/your/upload/
[full_path] => /path/to/your/upload/jpg.jpg
[raw_name] => mypic
[orig_name] => mypic.jpg
[client_name] => mypic.jpg
[file_ext] => .jpg
[file_size] => 22.2
[is_image] => 1
[image_width] => 800
[image_height] => 600
[image_type] => jpeg
[image_size_str] => width="800" height="200"
)

Answer 2

Use the following code :
if($this->upload->do_upload($file)){
//Get uploaded file data here
$allData=$this->upload->data();
$myFile = $allData['file_name'];
}