CI's upload class isnt working?

Question

Of course by that I mean I'm doing something wrong with it. I posted a question before similar to this one and got some answers. Well based on those answers (I wasn't using CI's class now I am) I'm having a new problem. Any help would be appreciated.

PHP

 public function do_upload () {

    $scopeId = $this->input->get('id');

    $config['upload_path'] = './uploads/';
    $config['allowed_types'] = 'gif|jpg|pdf';
    $config['max_size'] = '1000';
    $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());
        echo 'error';                         <----- This is what is showing up
        // uploading failed. $error will holds the errors.
    } else {
        $data = array('upload_data' => $this->upload->data()); 
        // uploading successfull, now do your further actions

        redirect(site_url('discovery/scopeDetails?scID='.$scopeId.''));
    }

    echo $error;
}

HTML Form

 <div id="upload">
    <?=form_open_multipart('discovery/do_upload');?>
 <input name="userfile" size="40" type="file" />
 <input type="submit" value="Upload" />
</div>

With the form i usually would just use straight HTML but I tried doing EXACTLY what http://codeigniter.com/user_guide/libraries/file_uploading.html told me to do.

Answer 1

Most likely the problem is your upload folder. Make sure it exists and set it's permissions to 777.

If that's not the problem then use print_r($error) to see what's wrong.