在几个主题模板中，我有代码来检索当前帖子或类别页面的类别名称和slug。它在环路之外。以下是重复代码：

global $post;
$categories = get_the_category($post->ID);
if ( $categories ) {
foreach ($categories as $category) {
    $dw_category_slug = $category->slug;
    $dw_category_name = $category->name;
}  
}else {
    $dw_category_slug = \'utopia\';
} 

我希望能够将其包含在函数文件中，而不是在多个地方编写它。这是我在函数文件中尝试的内容：

  add_action(\'wp_head\', \'dw_get_category\');
  function dw_get_category() {
    global $post;
    $categories = get_the_category($post->ID);
           if ( $categories ) {
               foreach ($categories as $category) {
               $dw_category_slug = $category->slug;
               $dw_category_name = $category->name;
        }
        } else {
            $dw_category_slug = \'utopia\';
        }         
    $dw_category[] = array(\'name\' => $dw_category_name, \'slug\' =>    $dw_category_slug);
    return $dw_category;     
    }                                                   

我希望能够写出$dw_category[\'name\'] 在模板文件中调用类别名称。我知道这样做是错误的。我是否需要将其分为2个函数，以便该函数只返回一个值？还是有其他方法可以做到这一点？以类的形式编写？

如果感兴趣，url为http://lenoremalenblog.com

谢谢你的时间。

  function dw_get_category() {
    global $post;
    $categories = get_the_category($post->ID);
        if ( $categories ) {
           foreach ($categories as $category) {
               $dw_category_slug = $category->slug;
               $dw_category_name = $category->name;
           }
        } else {
            $dw_category_slug = \'utopia\';
        }         
    $dw_category = array(\'name\' => $dw_category_name, \'slug\' =>    $dw_category_slug);
    return $dw_category;     
    } 

$the_post_cats = dw_get_category();
echo \'Category: \'.$the_post_cats[\'name\'];
echo \'Slug: \'.$the_post_cats[\'slug\'];