how to Rectify "random" list

Hi can you help me to rectify the code plz I want to rectify random list ,what is wrong in this code

                 <option value="title" <?php if ( ! empty( $_GET['filter-sort-by'] ) && 'rand' == $_GET['filter-sort-by'] ) : ?>selected="selected"<?php endif; ?>><?php echo __( 'rand', 'realia' ); ?></option> 

                                         <option value="published" <?php if ( ! empty( $_GET['filter-sort-by'] ) && 'rand' == $_GET['filter-sort-by'] ) : ?>selected="selected"<?php endif; ?>><?php echo __( 'rand', 'realia' ); ?></option>                          

                                        </select> </div><!-- /.filter-sort-by-wrapper -->