WordPress Widget - Find Restaurant

    // http://www.wpbeginner.com/wp-tutorials/how-to-use-shortcodes-in-your-wordpress-sidebar-widgets/
    add_filter('widget_text','do_shortcode');


    add_shortcode('shortcode_find_restaurant', 'shortcode_find_restaurant');
    function shortcode_find_restaurant() {

        $terms = get_terms( array(
            'taxonomy' => 'towns-restaurant',
            'hide_empty' => false,
        ) );
        
        if ( $terms && ! is_wp_error( $terms ) ) : 
        
            $output = "<select name=\"towns-restaurant\" class=\"taxonomy\" onchange=\"if (this.options[selectedIndex].value != '') location.href=this.options[selectedIndex].value\">";

                $output .= "<option value=''>Select a town</option>";

                $draught_links = array();

                foreach ( $terms as $term ) {

                    if( $term->count > 0 ) {

                        $term_link          = get_term_link( $term );
                        $draught_links[]    = $term->name;

                        $output             .= "<option value='".$term_link."'>".$term->name."</option>";

                    }

                }

                $on_draught = join( " ", $draught_links );

            $output .= "</select>";

            // search
            $output .= '
                        <form class="search clear" method="get" action="'.home_url().'" role="search">
                            <div class="left">
                                <input class="search-input" type="search" name="s" placeholder="Search Restaurants">
                            </div>
                            <div class="right">
                                <button class="search-submit transition" type="submit" role="button">GO</button>
                            </div>
                        </form>
                        ';

            return $output;

        endif;

    }