将值添加到WordPress菜单<li>项中的新属性

我的函数中有此代码。php添加新属性data-content="" 给我所有的<li> wordpress菜单中的项目。每个的值data-content 必须不同：我希望每个值都对应于<a> 标签

function add_attribute( $items, $args ) {
    $dom = new DOMDocument();
    $dom->loadHTML($items);
    $find = $dom->getElementsByTagName(\'li\');

    foreach ($find as $item ) :
        $item->setAttribute(\'data-content\',\'\');

    endforeach;

    return $dom->saveHTML();

}
add_filter(\'wp_nav_menu_items\', \'add_attribute\', 10, 2);

以下是最终结果（html）的格式：

<ul>
  <li class="menu-item" data-content="about">
    <a href="#">About</a>
  </li>

  <li class="menu-item" data-content="my-services">
    <a href="#">My services</a>
  </li>

  <li class="menu-item" data-content="contact-me">
    <a href="#">Contact me</a>
  </li>
</ul>

目前，PHP代码只创建属性，但不在其中添加任何值data-content. 我正在努力寻找如何做到这一点。。。非常感谢您的帮助，谢谢！

Upadate：我尝试了PHP函数nav_menu_link_attributes. 不幸的是，它不工作<li> 元素。函数在每个<a> 菜单的元素。

add_filter( \'nav_menu_link_attributes\', \'cfw_add_data_atts_to_nav\', 10, 4 );
function cfw_add_data_atts_to_nav( $atts, $item, $args )
{
    $atts[\'data-content\'] = sanitize_title($item->title);
    return $atts;
}

class themeslug_walker_nav_menu extends Walker_Nav_Menu { // add classes to ul sub-menus function start_lvl(&$output, $depth) { // depth dependent classes $indent = ( $depth > 0 ? str_repeat("\\t", $depth) : \'\' ); // code indent $display_depth = ( $depth + 1); // because it counts the first submenu as 0 $classes = array( \'sub-menu\', ( $display_depth % 2 ? \'menu-odd\' : \'menu-even\' ), ( $display_depth >= 2 ? \'sub-sub-menu\' : \'\' ), \'menu-depth-\' . $display_depth ); $class_names = implode(\' \', $classes); // build html $output .= "\\n" . $indent . \'<ul class="\' . $class_names . \'">\' . "\\n"; } // add main/sub classes to li\'s and links function start_el(&$output, $item, $depth, $args) { global $wp_query; $indent = ( $depth > 0 ? str_repeat("\\t", $depth) : \'\' ); // code indent // depth dependent classes $depth_classes = array( ( $depth == 0 ? \'main-menu-item\' : \'sub-menu-item\' ), ( $depth >= 2 ? \'sub-sub-menu-item\' : \'\' ), ( $depth % 2 ? \'menu-item-odd\' : \'menu-item-even\' ), \'menu-item-depth-\' . $depth ); $depth_class_names = esc_attr(implode(\' \', $depth_classes)); // passed classes $classes = empty($item->classes) ? array() : (array) $item->classes; $class_names = esc_attr(implode(\' \', apply_filters(\'nav_menu_css_class\', array_filter($classes), $item))); // build html $output .= $indent . \'<li data-content="\'.$item->title.\'" id="nav-menu-item-\' . $item->ID . \'" class="\' . $depth_class_names . \' \' . $class_names . \'">\'; // link attributes $attributes = !empty($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) . \'"\' : \'\'; $attributes .= \' class="menu-link \' . ( $depth > 0 ? \'sub-menu-link\' : \'main-menu-link\' ) . \'"\'; $item_output = sprintf(\'%1$s<a%2$s>%3$s%4$s%5$s</a>%6$s\', $args->before, $attributes, $args->link_before, apply_filters(\'the_title\', $item->title, $item->ID), $args->link_after, $args->after ); // build html $output .= apply_filters(\'walker_nav_menu_start_el\', $item_output, $item, $depth, $args); } }

wp_nav_menu( array( \'theme_location\' => \'menu-1\', \'container\' => \'div\', \'container_id\' => \'top-navigation-primary\', \'conatiner_class\' => \'top-navigation\', \'menu_class\' => \'menu main-menu menu-depth-0 menu-even\', \'echo\' => true, \'items_wrap\' => \'<ul id="%1$s" class="%2$s">%3$s</ul>\', \'depth\' => 10, \'walker\' => new themeslug_walker_nav_menu ) ); // thanks nick

小码农CODE

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