php - Codeigniter 3 upload not saving thumb to directory -

i trying save thumbnail image directory, not working. able save original image , save info database, reason thumbnail not saving thumbs directory create. directory has read/write access. note using dropzone.js.

here partial code:

 if ( ! $this->upload->do_upload('file'))  {      //upload failed, echo negative response dropzone.js     }    else     {             //upload success, upload file(s)             $image_data = $this->upload->data();              $img_config['source_image']   = '/uploads/videos/'.$image_data['file_name'];             $img_config['new_image']      = '/uploads/videos/thumbs/'.$image_data['file_name'];             $img_config['create_thumb']   = true;             $img_config['maintain_ratio'] = true;             $img_config['width'] = 251;             $img_config['height'] = 180;              $this->load->library('image_lib', $img_config);              $this->image_lib->resize();              $file = array(               'user_id'     =>  $this->my_auth->logged_in(),               'img_name'    =>  $image_data['raw_name'],               'thumb_name'  =>  $image_data['raw_name'].'_thumb',               'ext'         =>  $image_data['file_ext'],               'upload_date' =>  time()             );               $this->upload_model->add_image($file);                            $data['img_success'] = '<div class="alert alert-success" id="imgsuccess">your image <strong>' . $image_data['file_name'] . '</strong> uploaded!</div>';                $this->load->view('templates/frontend/front_header', $data);             $this->load->view('templates/frontend/front_navbar');             $this->load->view('frontend/upload_images', $data);             $this->load->view('templates/frontend/front_footer', $data);                                  }     

i able save original image, not thumbnail. can see wrong here?

i added __construct:

$this->original_path = realpath(apppath.'../uploads/images'); $this->thumbs_path = realpath(apppath.'../uploads/images/thumbs'); 

and changed source_image , new_image configs:

$img_config['source_image']   = $image_data['full_path']; $img_config['new_image']      = $this->thumbs_path; 

this seems have fixed it.