$config['upload_path'] = './include/upload/';
     $config['allowed_types'] = 'gif|jpg|png';
     $config['max_size'] = '2048';
     $config['max_width']  = '1024';
     $config['max_height']  = '1024';

     $this->load->library('upload', $config);
     $file_chk = $this->upload->do_upload();
     $file_error = $this->upload->display_errors();
     $daf =$this->upload->data();

     $config['image_library'] = 'gd2';
     $config['source_image'] = "/include/upload/".$daf[file_name];
     $config['width'] = 100;
     $config['height'] = 120;
   
     $this->load->library('image_lib', $config);

     $this->image_lib->resize();

     다시질문드립니다.
     upload하자마자 원본을 resize()하려고하는데 100x120 으로 줄이고 싶습니다
     근데 세로값이 게속 120이안나오는데여?