Codeigniter upload file name - php

Question

Usually we can get the form data in Codeigniter by using $this->input->get('field_name') or $this->input->post('field_name') and that's fine.
In raw PHP we use $_FILES["fileToUpload"]["name"] to get the file name that the user trying to upload.
My question is: Is there any Codeigniter way to get the name of the file that needs to be uploaded?
I am trying to say that i need to get the file name that the user is trying to upload before trying to save it in my server using Codeigniter library instead of using raw PHP global $_FILES variable.
<?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'] = 'gif|jpg|png';
$config['max_size'] = 100;
$config['max_width'] = 1024;
$config['max_height'] = 768;
$this->load->library('upload', $config);
// get the user submitted file name here
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);
}
}
}
?>

Answer 1

$upload_data = $this->upload->data();
$file_name = $upload_data['file_name'];
Here is the 2 version doc is for 2 and for 3
if you want to get the file name in backend:
$this->upload->file_name It will work based on system/library/upload.php
this function.
public function data()
{
return array (
'file_name' => $this->file_name,
'file_type' => $this->file_type,
...
);
}
If you need to get file name...
Before saving to server... you have work in javascript
<?php echo "<input type='file' name='userfile' size='20' onchange='changeEventHandler(event);' />"; ?>
onchange event in javascript:
<script>
function changeEventHandler(event){
alert(event.target.value);
}
</script>

Answer 2

$data = array('upload_data' => $this->upload->data());
// use file_name within the data() the final code will be
$data = array('upload_data' => $this->upload->data('file_name'));