Codeigniter thumbnail track path cannot be saved in MySql

Question

I am trying to create a simple program with Codeigniter, where I need to save the path to the thumbnails in the MySql database. Images along with thumbnail versions are loaded correctly in the upload folder, and I can save the image path in my database during upload, but I cannot save the thumbnail path in the database. I tried this in the controller:

$thumbnail= $this->resize($data['upload_data']['full_path'], $data['upload_data']  ['file_name']);
$thumbnail_path = './uploads/'. $thumbnail;
$newRow = array(
                    "title" => $this->input->post('title'),
                    "img_path" => $imgpath,
                    "thumbnail_path" => $thumbnail_path,
                    "post_body" => $this->input->post('post_body')
                    )

But it stores "./uploads/" in the thumbnail_path column in my table, not the actual thumbnail path. Where I expect it to save something like "./uploads/Lighthouse_thumb.jpg". I cannot figure out how to get the path to the thumbnails in order to save them in the database. Here is my complete download controller:      

  class Upload extends CI_Controller
  {

function __construct()
{
    parent::__construct();
    $this->load->helper('form');    
}
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'] = '1000';
    $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 {
        $image_data = $this->upload->data();
        $imgpath = './uploads/' . $image_data['file_name'];
        $data = array('upload_data'=>$this->upload->data());
        $thumbnail= $this->resize($data['upload_data']['full_path'], $data['upload_data']['file_name']);
        $thumbnail_path = './uploads/'. $thumbnail;
        $newRow = array(
                    "title" => $this->input->post('title'),
                    "img_path" => $imgpath,
                    "thumbnail_path" => $thumbnail_path,
                    "post_body" => $this->input->post('post_body')
                    );
            $this->load->model('postimage_path');
            $this->postimage_path->insert($newRow);
            $this->load->view('upload_success', $data);
    }

    }
function resize($path, $file) {
        $config['image_library'] = 'gd2';
        $config['source_image'] =  $path;
        $config['create_thumb'] = TRUE;
        $config['maintian_ratio'] = TRUE;
        $config['width'] = 100;
        $config['height'] = 100;
        $config['new_image'] = './uploads/' . $file;

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

    }

}

Answer 1

$thumbnail_path = './uploads/'. $thumbnail;

So thumbnail_path "./uploads/": , $thumbnail ( ..), , - , .

function resize($path, $file) {
    $config['image_library'] = 'gd2';
    $config['source_image'] =  $path;
    $config['create_thumb'] = TRUE;
    $config['maintian_ratio'] = TRUE;
    $config['width'] = 100;
    $config['height'] = 100;
    $config['new_image'] = './uploads/' . $file;

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

}

resize ! $thumbnail_path. .

, CodeIgniter. ( ):

image_resize, mypic.jpg, source_image, , 75 50 , GD2 image_library. maintain_ratio , , . mypic_thumb.jpg

, ! $data['upload_data']['file_name'], $data['upload_data']['file_name'] . "_thumb". , .

, , :

 $pathinfo = pathinfo($data['upload_data']['file_name']);
 $thumbnail_path = './uploads/'. $data['upload_data']['file_name'] . "_thumb" . $pathinfo['extension'];