Codeigniter - form validation doesn't work for files - codeigniter

Question

i need to set a input file as required into my Codeigniter Controller.
This is my form_validation:
$this->form_validation->set_rules('copertina','Foto principale','required|xss_clean');
and this is the form:
<?php echo form_open_multipart('admin/canile/nuovo'); ?>
<li class="even">
<label for="copertina">Foto principale <span>*</span></label>
<div class="input"><input type="file" name="copertina" value="<?php echo set_value('copertina'); ?>" id="copertina" /></div>
</li>
<?php echo form_close(); ?>
But after the submit the form say that the file is not set, so the required clausole fails...how can i fix it?

Answer 1

File upload data is not stored in the $_POST array, so cannot be validated using CodeIgniter's form_validation library. File uploads are available to PHP using the $_FILES array.
It maybe possible to directly manipulate the $_POST array using data from the $_FILES array, before running form validation, but I haven't tested this. It's probably best to just check the upload library process for errors.
In addition, it is not possible, for security reasons, to (re-)set the value on page reload.

Answer 2

To make validation to work for files you have to check whether is it empty.
like,
if (empty($_FILES['photo']['name']))
{
$this->form_validation->set_rules('userfile', 'Document', 'required');
}

Answer 3

you can solve it by overriding the Run function of CI_Form_Validation
copy this function in a class which extends CI_Form_Validation .
This function will override the parent class function . Here i added only a extra check which can handle file also
/**
* Run the Validator
*
* This function does all the work.
*
* #access public
* #return bool
*/
function run($group = '') {
// Do we even have any data to process? Mm?
if (count($_POST) == 0) {
return FALSE;
}
// Does the _field_data array containing the validation rules exist?
// If not, we look to see if they were assigned via a config file
if (count($this->_field_data) == 0) {
// No validation rules? We're done...
if (count($this->_config_rules) == 0) {
return FALSE;
}
// Is there a validation rule for the particular URI being accessed?
$uri = ($group == '') ? trim($this->CI->uri->ruri_string(), '/') : $group;
if ($uri != '' AND isset($this->_config_rules[$uri])) {
$this->set_rules($this->_config_rules[$uri]);
} else {
$this->set_rules($this->_config_rules);
}
// We're we able to set the rules correctly?
if (count($this->_field_data) == 0) {
log_message('debug', "Unable to find validation rules");
return FALSE;
}
}
// Load the language file containing error messages
$this->CI->lang->load('form_validation');
// Cycle through the rules for each field, match the
// corresponding $_POST or $_FILES item and test for errors
foreach ($this->_field_data as $field => $row) {
// Fetch the data from the corresponding $_POST or $_FILES array and cache it in the _field_data array.
// Depending on whether the field name is an array or a string will determine where we get it from.
if ($row['is_array'] == TRUE) {
if (isset($_FILES[$field])) {
$this->_field_data[$field]['postdata'] = $this->_reduce_array($_FILES, $row['keys']);
} else {
$this->_field_data[$field]['postdata'] = $this->_reduce_array($_POST, $row['keys']);
}
} else {
if (isset($_POST[$field]) AND $_POST[$field] != "") {
$this->_field_data[$field]['postdata'] = $_POST[$field];
} else if (isset($_FILES[$field]) AND $_FILES[$field] != "") {
$this->_field_data[$field]['postdata'] = $_FILES[$field];
}
}
$this->_execute($row, explode('|', $row['rules']), $this->_field_data[$field]['postdata']);
}
// Did we end up with any errors?
$total_errors = count($this->_error_array);
if ($total_errors > 0) {
$this->_safe_form_data = TRUE;
}
// Now we need to re-set the POST data with the new, processed data
$this->_reset_post_array();
// No errors, validation passes!
if ($total_errors == 0) {
return TRUE;
}
// Validation fails
return FALSE;
}

Answer 4

Have you looked at this ->
http://codeigniter.com/user_guide/libraries/file_uploading.html
<?php
class Upload extends CI_Controller {
function __construct()
{
parent::__construct();
$this->load->helper(array('form', 'url'));
}
function index()
{
$this->load->view('upload_form', array('error' => ' ' ));
}
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())
{
$error = array('error' => $this->upload->display_errors());
$this->load->view('upload_form', $error);
}
else
{
$data = array('upload_data' => $this->upload->data());
$this->load->view('upload_success', $data);
}
}
}
?>
Update as per comment:
You can check using plain php if you like ...
$errors_file = array(
0=>'Success!',
1=>'The uploaded file exceeds the upload_max_filesize directive in php.ini',
2=>'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form',
3=>'The uploaded file was only partially uploaded',
4=>'No file was uploaded',
6=>'Missing a temporary folder',
7=>'Cannot write file to disk'
);
if($_FILES['form_input_file_name']['error'] == 4) {
echo 'No file uploaded';
}
if($_FILES['form_input_file_name']['error'] == 0) {
echo 'File uploaded... no errors';
}