Form Data and File Upload

[eluser]wowdezign[/eluser]
Okay. I got a solution. There are probably other solutions, but I can explain why it was failing for me.

The upload field gets put into $_FILES even if it is empty and the error and size are set to 4 and 0 respectively Here is the do_upload function from CI:

Code:

function do_upload($field = 'userfile'){
    // Is $_FILES[$field] set? If not, no reason to continue.
    if ( ! isset($_FILES[$field])){
        $this->set_error('upload_no_file_selected');
        return FALSE;
    }
    // Is the upload path valid?
    if ( ! $this->validate_upload_path()){
        // errors will already be set by validate_upload_path() so just return FALSE
        return FALSE;
    }
    // Was the file able to be uploaded? If not, determine the reason why.
    if ( ! is_uploaded_file($_FILES[$field]['tmp_name'])){
        $error = ( ! isset($_FILES[$field]['error'])) ? 4 : $_FILES[$field]['error'];
        switch($error){
            case 1:    // UPLOAD_ERR_INI_SIZE
                $this->set_error('upload_file_exceeds_limit');
                break;
            case 2: // UPLOAD_ERR_FORM_SIZE
                $this->set_error('upload_file_exceeds_form_limit');
                break;
            case 3: // UPLOAD_ERR_PARTIAL
               $this->set_error('upload_file_partial');
                break;
            case 4: // UPLOAD_ERR_NO_FILE
               $this->set_error('upload_no_file_selected');
                break;
            case 6: // UPLOAD_ERR_NO_TMP_DIR
                $this->set_error('upload_no_temp_directory');
                break;
            case 7: // UPLOAD_ERR_CANT_WRITE
                $this->set_error('upload_unable_to_write_file');
                break;
            case 8: // UPLOAD_ERR_EXTENSION
                $this->set_error('upload_stopped_by_extension');
                break;
            default :   $this->set_error('upload_no_file_selected');
                break;
        }
        return FALSE;
    }

When I submitted my form with an empty upload field I got the following for $_FILES:

Code:

Array
(
    [userfile] => Array
        (
            [name] =>
            [type] =>
            [tmp_name] =>
            [error] => 4
            [size] => 0
        )
)

So the solution for me was to do:

Code:

if($_FILES['userfile']['error'] != 4){
  // Do upload here
}

Like I said before. There are probably better ways to do this, but My form is working now. Hopefully I won't find something I overlooked later and get :red:.