How to Display Upload Errors

[eluser]RMinor[/eluser]
I am having a difficult time figuring out how to display the upload errors on my view. I figured putting them into an array and then passing that to the view would enable it work how I have it coded. However, when I try to upload a file that is too large I just get an undefined index "upload_error". My controller and view are below.

Controller...

Code:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Upload extends CI_Controller {

    protected $_page = 'upload';

    public function __construct()
    {
        parent::__construct();
    }

    public function index()
    {
        $this->load->model('Upload_model');
        $data['page'] = $this->Global_model->pageInformation($this->_page);
        $data['testimonials'] = $this->Upload_model->getTestimonials();
        $this->load->helper('form');  
        $this->load->library('form_validation');
        $this->form_validation->set_error_delimiters('<div class="error">', '</div>');
        $this->form_validation->set_rules('name', 'Name', 'trim|required');
        $this->form_validation->set_rules('email', 'Email Address', 'trim|required|valid_email');
        $this->form_validation->set_rules('birth_month', 'Birth Month', 'trim|required|integer|exact_length[2]');
        $this->form_validation->set_rules('birth_day', 'Birth Day', 'trim|required|integer|exact_length[2]');
        $this->form_validation->set_rules('birth_year', 'Birth Year', 'trim|required|integer|exact_length[4]');
        $this->form_validation->set_rules('ip', 'IP Adress', 'trim|required|valid_ip');
        if($this->form_validation->run() == FALSE) {} else {
            if ($this->process_upload()) {
                redirect('upload_success');
            } else {
                $data['errors'] = $data['upload_error']; // the $data['upload_errror'] is coming back undefined
            }
        }
        $this->load->view('upload_view', $data);
    }

    /**
     * Method to upload two images and create thumbnails of them.
     */
    public function process_upload()
    {
        $this->load->library('upload');
        $this->load->library('image_lib');
        $config['upload_path'] = './models/';
        $config['allowed_types'] = 'gif|jpg|jpeg|png';
        $config['max_size'] = '2048';
        $config_thumb['create_thumb'] = TRUE;
        $config_thumb['maintain_ratio'] = TRUE;
        $config_thumb['width'] = 150;
        $config_thumb['height'] = 150;
        if (!empty($_FILES['photo_one']['name'])) {
            $this->upload->initialize($config);
            if (!$this->upload->do_upload('photo_one')) {
                $data['upload_error'][] = $this->upload->display_errors();    
                return FALSE;              
            } else {
                $photo_info = $this->upload->data();
                $config_thumb['source_image'] = $photo_info['full_path'];
                $db_info['photo_one'] = $photo_info['file_name'];
                $this->image_lib->initialize($config_thumb);
                $this->image_lib->resize();
                $db_info['thumb_one'] = $photo_info['raw_name'] . '_thumb' . $photo_info['file_ext'];
                $this->image_lib->clear();
            }
        }
        if (!empty($_FILES['photo_two']['name'])) {
            $this->upload->initialize($config);
            if (!$this->upload->do_upload('photo_two')) {
                $data['upload_error'][] = $this->upload->display_errors();
                return FALSE;              
            } else {
                $photo_info = $this->upload->data();
                $config_thumb['source_image'] = $photo_info['full_path'];
                $db_info['photo_two'] = $photo_info['file_name'];
                $this->image_lib->initialize($config_thumb);
                $this->image_lib->resize();
                $this->image_lib->clear();
                $db_info['thumb_two'] = $photo_info['raw_name'] . '_thumb' . $photo_info['file_ext'];
            }
        }
        $this->Upload_model->addModel($db_info);
        return TRUE;
    }

}

View (This is only the code to display the errors)...

Code:

<?php if (isset($errors)) {
foreach ($errors as $error) {?>
    <div class="error">&lt;?php echo $error; ?&gt;</div>
&lt;?php }
} ?&gt;