看起来您的换行符已被删除。正因为如此,从第 17 行开始的注释// don't output children opening tag
实际上会继续贯穿代码的其余部分。您需要添加适当的换行符。
<?php
// Activate menu function
add_action('init', 'my_custom_menus');
function my_custom_menus()
{
register_nav_menus(array(
'main-menu' => 'Main Menu',
'footer-menu' => 'Footer Menu',
'top_menu' => 'Top Menu',
'resp_menu' => 'Responsive Menu'
));
}
// Main walker menu
class Walker_Responsive_Menu extends Walker_Nav_Menu {
function start_lvl(&$output, $depth){
$indent = str_repeat("\t", $depth);
// don't output children opening tag (`<ul>`)
} function end_lvl(&$output, $depth){
$indent = str_repeat("\t", $depth);
// don't output children closing tag
}
function start_el(&$output, $item, $depth, $args) {
global $wp_query;
$item_output = $attributes = $prepend ='';
// Create a visual indent in the list if we have a child item.
$visual_indent = ( $depth ) ? str_repeat(' ', $depth) : '';
// Load the item URL
$attributes .= ! empty( $item->url ) ? ' value="' . esc_attr( $item->url ) .'"' : '';
// If we have hierarchy for the item, add the indent, if not, leave it out.
// Loop through and output each menu item as this.
if($depth != 0)
{
$item_output .= '<option ' . $attributes .'>'. $visual_indent . $item->title. '</option>';
}
else
{
$item_output .= '<option ' . $attributes .'>'.$prepend.$item->title.'</option>';
}
// Make the output happen.
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); }}
class description_walker extends Walker_Nav_Menu{
function start_el(&$output, $item, $depth, $args)
{
global $wp_query;
$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
$class_names = $value = '';
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) ); $class_names = ' class="'. esc_attr( $class_names ) . '"';
$output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>';
$attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : '';
$attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : '';
$attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : '';
$attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : '';
$prepend = '<strong>';
$append = '</strong>';
$description = ! empty( $item->description ) ? '<span>'.esc_attr( $item->description ).'</span>' : '';
if($depth != 0)
{
$description = $append = $prepend = "";
}
$item_output = $args->before;
$item_output .= '<a'. $attributes .'>';
$item_output .= $args->link_before .$prepend.apply_filters( 'the_title', $item->title, $item->ID ).$append;
$item_output .= $description.$args->link_after;
$item_output .= '</a>';
$item_output .= $args->after;
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
}
}
?>