
什么是TTL及应如何选择正确的值
wp_nav_menu_remove_menu_item_has_children_class ( $classes, $menu_item, $args = false, $depth = false )
wp_nav_menu_remove_menu_item_has_children_class: 这是一个过滤钩子,允许在菜单项有子项的情况下修改添加到菜单项的HTML输出的CSS类。默认情况下,WordPress将menu-item-has-children类添加到菜单项的li元素中。这个钩子可以用来删除或修改这个类。
从底层菜单项中移除`menu-item-has-children`类。
这在{@see ‘nav_menu_css_class’}过滤器上运行。$args和$depth参数是在WordPress 3.0.0中最初引入过滤器后添加的,所以这需要允许在没有它们的情况下调用过滤器。
function wp_nav_menu_remove_menu_item_has_children_class( $classes, $menu_item, $args = false, $depth = false ) { /* * Account for the filter being called without the $args or $depth parameters. * * This occurs when a theme uses a custom walker calling the `nav_menu_css_class` * filter using the legacy formats prior to the introduction of the $args and * $depth parameters. * * As both of these parameters are required for this function to determine * both the current and maximum depth of the menu tree, the function does not * attempt to remove the `menu-item-has-children` class if these parameters * are not set. */ if ( false === $depth || false === $args ) { return $classes; } // Max-depth is 1-based. $max_depth = isset( $args->depth ) ? (int) $args->depth : 0; // Depth is 0-based so needs to be increased by one. $depth = $depth + 1; // Complete menu tree is displayed. if ( 0 === $max_depth ) { return $classes; } /* * Remove the `menu-item-has-children` class from bottom level menu items. * -1 is used to display all menu items in one level so the class should * be removed from all menu items. */ if ( -1 === $max_depth || $depth >= $max_depth ) { $classes = array_diff( $classes, array( 'menu-item-has-children' ) ); } return $classes; }