php - 删除空类

Question

删除空类

如何删除 wp 菜单中的空类？助行器菜单

我有以下代码:

add_filter('nav_menu_css_class', 'discard_menu_classes', 10, 2);

function discard_menu_classes($classes, $item) {
  $classes = array_filter(
    $classes,
    create_function('$class',
      'return in_array( $class, 
      array("current-menu-item", "current-menu-parent"));
    ' )
  );
  return array_merge(
      $classes,
      (array) get_post_meta($item - > ID, '_menu_item_classes', true)

<ul class="dropdown-menu">
  <li id="menu-item-2338" class=""><a href="#">Text</a></li>
  <li id="menu-item-2058" class=""><a href="#">Text</a></li>
  <li id="menu-item-18781" class=""><a href="#">Text</a></li>
</ul>

已解决:

我设法解决了它

代码如下

add_filter('wp_nav_menu', 'strip_empty_classes');

function strip_empty_classes($menu) {
  $menu = preg_replace('/ class=""/', '', $menu);
  return $menu;
}

<ul class="dropdown-menu">
  <li id="menu-item-2338" class=""><a href="#">Text</a></li>
  <li id="menu-item-2058" class=""><a href="#">Text</a></li>
  <li id="menu-item-18781" class=""><a href="#">Text</a></li>
</ul>

Answer 1

已解决:

add_filter ('wp_nav_menu','strip_empty_classes');
function strip_empty_classes($menu) {
    $menu = preg_replace('/ class=""/','',$menu);
    return $menu;
}