Codeigniter File uplaod - php

Question

Hi I am trying to use the codigniter do_upload function below:
But get this error: "You did not select a file to upload." I do select a file and when i pass the name i can see the name but still can not upload...thanks in advance for the help.
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())
{
$data = array('error' => $this->upload->display_errors());
print_r($data);
exit;
//$this->load->view('clients_page', $error);
}
else
{
$data = array('upload_data' => $this->upload->data());
print_r($data);
exit;
}
}

Answer 1

I assume you're not naming your <input type="file" /> the default userfile. It would be nice to see your upload view also.
change this
$this->upload->do_upload()
to this
$this->upload->do_upload('audioRef')

Answer 2

I do select a file and when i pass the name i can see the name but still can not upload
This is often because you've omitted to set your form to submit as multipart/form-data. Forms default to application/x-www-form-urlencoded, which can't contain file uploads; in this case you just get the filename instead.
<form method="post" action="..." enctype="multipart/form-data">
Incidentally,
$config['allowed_types'] = 'gif|jpg|png';
if you must use filename extension to check file type (and it's inadvisable, but that's what CodeIgniter offers, unfortunately), please also allow jpeg and any other likely extensions.
$config['upload_path'] = './uploads/';
If that uploads folder is within the webroot (you'll be serving files directly out of it), that's potentially a cross-site-scripting vulnerability. Unfortunately it is possible to upload files that look like images but in fact contain HTML, including <script>.
Doing user-uploaded-content in a safe way is hard. See eg this question for background.