我在函数中制作了一个小部件。php，如下所示：

class Categories_Widget extends WP_Widget
{
  function __construct() {
        parent::__construct(
            \'categories_widget\', // Base ID
          (\'Categoriën tonen\'), // Name
            array( \'description\' => ( \'Toon categoriën\' ), ) // Args
        );
    }
  function widget($args, $instance)
  {
    extract($args, EXTR_SKIP);

    echo $before_widget;
    //echo "<h1>This is my new widget!</h1>";
    include \'inc/categories.php\';
    echo $after_widget;
  }
}
add_action( \'widgets_init\', create_function(\'\', \'return register_widget("Categories_Widget");\') );

这完全有效。在这个小部件中，我包括categories.php 文件，如下所示：

<?php

    $categories = get_categories();

    foreach ( $categories as $category ) {
      ?>
      <div class="categories-block category-<?php echo $category->name ?>">
        <h4><?php echo $category->name ?></h4>
        <ul>
        <?php
        $catId = $category->term_id;
        global $post;
        $args = array( \'category\' => $catId );
        $posts = get_posts( $args );
        foreach ( $posts as $post ) {
          setup_postdata($post);
          ?>
          <li><a href="<?php the_permalink() ?>"><?php the_title() ?></a></li>
          <?php
        }
        wp_reset_postdata();
        ?>
        </ul>
      </div>
      <?php
    }

出于某种原因，它显示类别名称，但不显示我要创建的查询。