ติดปัญหาเวลาขึ้น host จริงครับ เวลาเพิ่มรูปภาพบน localhost ไม้เป็นอะไรครับ แต่พอขึ้น Host แล้ว เพิ่มรูปภาพ จะ Error ครับ

public function add_travel_complete_img()
 {
  if($this->session->userdata('email') != '')
  {
      $id_places        = $this->input->post('id_places');

      if ($this->input->post('file_submit') && !empty($_FILES['file_upload']['name']))
      {
       $number_of_files = sizeof($_FILES['file_upload']['tmp_name']);
       $files = $_FILES['file_upload'];

       for($i = 0; $i < $number_of_files; $i++)
       {
        if ($_FILES['file_upload']['error'][$i] != 0)
        {
         $this->form_validation->set_message('file_upload', '<div class="alert alert-danger" role="alert"><i class="fa fa-exclamation-triangle"></i> Error upload files!!</div>');
         return false;
        }
        
       }

       $this->load->library('upload');
       $config['upload_path']    = FCPATH.'/uploads/products';
       $config['allowed_types']  = 'gif|jpg|png|jpeg';
       $config['max_size']       = '40480';
       $config['max_width']    = '8000';
       $config['max_height']    = '8000';
       $config['encrypt_name']   = true;



       for ($i = 0; $i < $number_of_files; $i++)
       {
        $_FILES['file_upload']['name']    = $files['name'][$i];
        $_FILES['file_upload']['type']    = $files['type'][$i];
        $_FILES['file_upload']['tmp_name']   = $files['tmp_name'][$i];
        $_FILES['file_upload']['error']   = $files['error'][$i];
        $_FILES['file_upload']['size']    = $files['name'][$i];

        $this->upload->initialize($config);
        if ($this->upload->do_upload('file_upload'))
        {
         $data = $this->upload->data();
         chmod($data['full_path'], 0777);
         //insert to database

         $insert[$i]['file_name']   = $data['file_name'];
         $insert[$i]['ID_PLACE']     = $id_places;
         // $data_id = array('id_product' =>  $teacher_id_list);
        }

       }

         $succeed = $this->db->insert_batch('picture',$insert);
         if($succeed > 0)
          {
            $this->session->set_flashdata('response','Save travel Successfully.');
          }
          else
          {
            $this->session->set_flashdata('msg','Failled to Save travel!!');
          }
          redirect('travel_mng');

      }else{
         $this->session->set_flashdata('msg','Failled to save file!!');
     }

     }else{
          $this->session->set_flashdata('msg','Failled to save!!');
     
   }
 }