如何在wp_nav_menu中添加要链接的类? [英] How to add class to link in wp_nav_menu?

问题描述

我正在尝试不使用ul和li的wp菜单，并向该元素添加了一个类.

I am trying to out a wp menu without ul and li and have a class added to the element.

我尝试将其添加到我的function.php中

I have tried adding this in my function.php

function add_menuclass($ulclass) {
  return preg_replace('/<a /', '<a class="list-group-item"', $ulclass, 1);
}
add_filter('wp_nav_menu','add_menuclass');

在我的模板中，我有:

<?php
 $menuParameters = array(
   'menu'  => 'Videos',
   'container'       => false,
   'echo'            => false,
   'items_wrap'      => '%3$s',
   'depth'           => 0,
);

  echo strip_tags(wp_nav_menu( $menuParameters ), '<a>' );
?>

但是输出仅将类应用于第一项，而不是所有的<a>都符合预期.

But the output only applies the class to the first item and not all of the <a>s as expected.

<div class="list-group">
   <a class="list-group-item" href="#">First item</a>
   <a href="#">Second item</a>
</div>

我正在尝试实现这一目标，基本上是将该类应用于我的所有项目(不确定为什么将其仅应用于一个项目)-请不要使用jQuery.

I am trying to achieve this, basically to apply that class to ALL my item (not sure why it applies it to only one) - No jQuery please.

<div class="list-group">
   <a class="list-group-item" href="#">First item</a>
   <a class="list-group-item" href="#">Second item</a>
</div>

推荐答案

感谢 Sergiu Paraschiv 评论该问题是关于限制为1.

Thanks to Sergiu Paraschiv comment the issue was in regards of limiting to 1.

因此它应该在function.php中:

Therefore it should be in function.php:

function add_menuclass($ulclass) {
   return preg_replace('/<a /', '<a class="list-group-item"', $ulclass);
}
add_filter('wp_nav_menu','add_menuclass');

更新

实际上有一种更好的方法可以给我们更多的控制权，而这段代码是Jeff Starr在

There is a better way actually which gives us much more control and the piece of code is provided by Jeff Starr on this post

注意:这不是在添加当前的课程

NOTE: this isn't adding the current class tho

在wp上创建菜单，然后记住单击菜单编辑器中的位置，然后在函数中执行以下操作:

Create your menu on wp, then remember to click the location in the menu editor then in your function you'd do:

// custom menu example @ https://digwp.com/2011/11/html-formatting-custom-menus/
function clean_custom_menus() {
    $menu_name = 'nav-primary'; // specify custom menu name
    if (($locations = get_nav_menu_locations()) && isset($locations[$menu_name])) {
        $menu = wp_get_nav_menu_object($locations[$menu_name]);
        $menu_items = wp_get_nav_menu_items($menu->term_id);

        $menu_list = '<nav>' ."\n";
        $menu_list .= "\t\t\t\t". '<ul>' ."\n";
        foreach ((array) $menu_items as $key => $menu_item) {
            $title = $menu_item->title;
            $url = $menu_item->url;
            $menu_list .= "\t\t\t\t\t". '<li><a href="'. $url .'">'. $title .'</a></li>' ."\n";
        }
        $menu_list .= "\t\t\t\t". '</ul>' ."\n";
        $menu_list .= "\t\t\t". '</nav>' ."\n";
    } else {
        // $menu_list = '<!-- no list defined -->';
    }
    echo $menu_list;
}

最后我们可以调用菜单:

Finally we can call our menu:

<?php if (function_exists(clean_custom_menus())) clean_custom_menus(); ?>

上面的代码取自上面链接的帖子，我认为应该包含这个答案，因为这个问题似乎访问了很多人.

The code above is taken from the post linked above, I thought to include this answer as it appears this question has many visits.

更新2

另一种解决方案可能是(也许是最好的):

Another solution would be (maybe the best):

header.php:

header.php:

    <?php
      wp_nav_menu( array(
        'theme_location'  => 'topnav',
        'menu'            =>'topnav',
        'container'       => 'div', 
        'container_class' => 'collapse navbar-collapse', 
        'container_id'    => 'navbarCollapse',
        'menu_class'      => 'menu', 
        'echo'            => true,
        'fallback_cb'     => 'wp_page_menu',
        'items_wrap'      => '<ul class="nav justify-content-end w-100 %2$s">%3$s</ul>',
        'depth'           => 0
      ) );
    ?>

function.php:

function.php:

 // register the nav
 function register_my_menu() {
  register_nav_menu('topnav',__( 'topnav' ));
 }
 add_action( 'init', 'register_my_menu' );

// let's add "*active*" as a class to the li

add_filter('nav_menu_css_class' , 'special_nav_class' , 10 , 2);
function special_nav_class($classes, $item){
     if( in_array('current-menu-item', $classes) ){
             $classes[] = 'active ';
     }
     return $classes;
}

// let's add our custom class to the actual link tag    

function atg_menu_classes($classes, $item, $args) {
  if($args->theme_location == 'topnav') {
    $classes[] = 'nav-link';
  }
  return $classes;
}
add_filter('nav_menu_css_class', 'atg_menu_classes', 1, 3);

function add_menuclass($ulclass) {
   return preg_replace('/<a /', '<a class="nav-link"', $ulclass);
}
add_filter('wp_nav_menu','add_menuclass');

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