Validation file input and text input

[eluser]cyberjunkie[/eluser]
Ok I finally got it to work, here is the full code. I'm also re-sizing the uploaded file. Note: I changed the name of my file input to entry_image so I had to add that in the function argument

Code:

$this->upload->do_upload('entry_upload')

Code:

function create()
{
  $this->form_validation->set_rules('content', 'Entry', 'trim|required|xss_clean');    
  $this->form_validation->set_rules('entry_upload', 'Image', 'callback__file_validation');
  
  if ($this->form_validation->run() == FALSE)
  {
   //Load View
  }
  else
  {
   $entry_image = NULL; //leave NULL if no file uploaded
  
   if ($_FILES['entry_upload']['error'] == 0) //There is no error, the file uploaded with success.
   {
    $entry_image = $this->upload->file_name; //set to file name
   }
      
  
   $data = array (
    'user_id' => $this->tank_auth->get_user_id(),
    'content' => $this->input->post('content'),
    'entry_image' => $entry_image
   );
  
   $this->Entries_model->create_entry($data);
  
   $this->session->set_flashdata('success', 'Entry added!');
   //redirect
  }  
  
}

Callback. First I'm checking to see if a file was selected before validating. This is handy of you don;t want file uploads to be required.

Code:

function _file_validation()
{
  if ($_FILES['entry_upload']['error'] !== 4) //if file selected
  {
   $user_id = $this->tank_auth->get_user_id();
  
   $config['upload_path'] = "./uploads/entries/{$user_id}";
   $config['allowed_types'] = 'jpg|png';
   $config['encrypt_name'] = TRUE;
   $config['overwrite'] = FALSE;
   $config['max_size'] = '800'; //in KB
  
   $this->load->library('upload', $config);
  
   if (! $this->upload->do_upload('entry_upload'))
   {
    //set file errors
    $this->form_validation->set_message('_file_validation', $this->upload->display_errors('', ''));
    return FALSE;
   }
   else
   {
    //Resize Image
    $config['image_library'] = 'gd2';
    $config['source_image'] = $this->upload->upload_path.$this->upload->file_name;
    $config['create_thumb'] = TRUE;
    $config['maintain_ratio'] = TRUE;
    $config['width'] = 120;
    $config['height'] = 120;
    
    $this->load->library('image_lib', $config);
    
    if (! $this->image_lib->resize())
    {
     //set file errors
     $this->form_validation->set_message('_file_validation', $this->image_lib->display_errors('', ''));
     return FALSE;
    }
  
    return TRUE;
   }
  }
  
  return TRUE;
}