Codeigniter Rename file on upload

Question

I'm trying to add time as the prefix of the image name along with the original name when uploading, But I couldn't figure it out. Please help me with the following code to add a prefix to my original file name when uploading.

<?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'] = 'Public/uploads/';         $config['allowed_types'] = 'gif|jpg|png';         $config['max_size'] = '1024';         $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);         }     } } ?> 

Answer 1

You can encrypt file name with use of CI native option:

$config['encrypt_name'] = TRUE; 

OR

You can do it with your own code:

$new_name = time().$_FILES["userfiles"]['name']; $config['file_name'] = $new_name; 

Answer 2

For some reasons, consecutive calls to the do_upload function doesn't work. It sticks to the first filename set by the first function call

$small_photo_url  = $this->upload_photo('picture_small',  $this->next_id.'_small '); $medium_photo_url = $this->upload_photo('picture_medium', $this->next_id.'_medium'); $large_photo_url  = $this->upload_photo('picture_large',  $this->next_id.'_large '); 

The filenames will all be "00001_small", "00001_small1", "00001_small2" given the following configurations

function upload_photo($field_name, $filename) {     $config['upload_path'] = 'Public/uploads/';     $config['allowed_types'] = 'gif|jpg|png';     $config['max_size'] = '1024';     $config['max_width']  = '1024';     $config['max_height']  = '768';     $config['file_name'] = $filename;      $this->load->library('upload', $config);      if ( ! $this->upload->do_upload())... 

I think it's because this line doesn't work the second time you call it. It does not set the configurations again

$this->load->library('upload', $config); 

========================================================================== Solution to the problem faced during consecutive do_upload function calls:

// re-initialize upload library $this->upload->initialize($config);