Кажется, вы пропустили установку имени входа как "myimage".Вот полный код загрузки изображения codeigniter (как упомянуто в их документации).
<html>
<head>
<title>Upload Form</title>
</head>
<body>
<?php echo $error;?>
<?php echo form_open_multipart('upload/do_upload');?>
<input type="file" name="userfile" size="20" />
<br /><br />
<input type="submit" value="upload" />
</form>
</body>
</html>
Код контроллера:
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);
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());
$uploadData= array(
'title' => TITLE,
'date' => date("Y-m-d H:i:s"),
'slug' => SLUG,
'text' => TEXT,
'myimage' => FILE_NAME,
'user_id' => USER_ID,
);
$this->db->insert('mytable', $uploadData);
$this->load->view('upload_success', $data);
}
}
}