不要为此使用设置api。

Register a custom post type, \'笑话“看register_post_type docs

add_action( \'init\', function () {
  $labels = array(
    \'name\'  => \'Jokes\',
    \'singular_name\' => \'Joke\',
    \'add_new\' => \'Add New\',
    \'add_new_item\' => \'Add New Joke\',
    \'new_item\' => \'New Joke\',
    \'edit_item\' => \'Edit Joke\',
    \'view_item\' => \'View Joke\',
    \'all_items\' => \'All Jokea\',
    \'search_items\' => \'Search Jokes\',
    \'not_found\' => \'No jokes found.\',
    \'not_found_in_trash\' => \'No jokes found in Trash.\',
  );
  $args = array(
    \'labels\' => $labels,
    \'public\' => true,
    \'publicly_queryable\' => false,
    \'show_ui\' => true,
    \'show_in_menu\' => true,
    \'show_in_nav_menus\' => false,
    \'query_var\' => false,
    \'rewrite\' => false,
    \'capability_type\' => \'post\',
    \'has_archive\' => false,
    \'hierarchical\' => false,
    \'supports\' => array( \'title\', \'editor\')
  );
  register_post_type( \'joke\', $args );
});

对于每个参数，请参阅documentation.

WordPress将为您添加管理菜单。

现在，您的网站用户可以创建自己的笑话。

此时，您可以编写一个函数，随机取笑并返回标记，我将使用get_posts 对于范围：

function get_random_joke() {
  $args = array(
    \'post_type\' => \'joke\', // be sure this is exactly 1st arg of register_post_type
    \'posts_per_page\' => 1, // one joke is enough
    \'orderby\' => \'rand\' // randomly
  );
  $jokes = get_posts( $args );
  if ( empty( $jokes ) ) return; // no jokes, nothing to do
  $joke = array_pop( $jokes ); // get posts always returns an array
  $out = \'<div id="joke">\';
  $out .= sprintf( \'<h3>%s</h3>\', apply_filters(\'the_title\', $joke->post_title) );
  $out .= sprintf( \'<p>%s</p>\', apply_filters(\'the_content\', $joke->post_content) );
  $out .= \'<div>\';
  return $out;
}

并可以从短代码调用此函数：

add_shortcode( \'joke\' , \'get_random_joke\' );

现在，您可以在您的帖子/页面中插入isert[joke] 并且会随机播放一个笑话（如果有……）

然而，如果您正在开发一个插件，那么在主题中404.php 文件不包含任何帖子或页面，所以您将把那个短代码放在哪里？

也许您可以编写自己的404模板，并使用它来代替主题模板，只需在\'template_include\':

add_filter( \'template_include\', function( $template ) {
  if ( is_404() ) $template = plugin_dir_path( __FILE__  ) . \'404.php\';
  return $template;
} );

使用此代码，当有一个请求变成404时，WordPress将需要404。php在插件文件夹中，而不是在主题中。

在此模板中，您可以使用get_random_joke() 输出笑话的函数，只是一个示例（高度派生自2013主题）：

<?php get_header(); ?>
<div id="primary" class="content-area">
  <div id="content" class="site-content" role="main">
    <header class="page-header">
      <h1 class="page-title">Not found</h1>
    </header>
    <div class="page-wrapper">
      <div class="page-content">
        <h2>This is somewhat embarrassing, isn&rsquo;t it?</h2>
        <p>It looks like nothing was found at this location. Maybe try a search?</p>
        <?php get_search_form(); ?>

        <?php echo get_random_joke(); ?>

      </div>
    </div>
  </div>
</div>
<?php get_footer(); ?>