创建类别过滤器

Question

一个Woocommerce产品的小部件，我想创建一个WooCommerce产品小部件，如标准WooCommerce产品小部件，但与选项的类别进行筛选。我知道显示某个类别的产品有一个简码，但我不喜欢标准的缩略图视图，但喜欢在WooCom产品小部件中有一个列表。

在GitHub上，我发现下面的代码，允许添加WooCom产品小部件产品ID过滤器：

<?php 
/* 
Plugin Name: Woocommerce Custom Widget Product 
Description: This plugin help display a list of customs products on your website 
Author: Binh Nguyen 
Version: 1.0 
Author URI: http://vietcomic.net/ 
*/ 


if (! defined('ABSPATH')) exit; // Exit if accessed directly 

class Bi_Widget_Product extends WP_Widget 
{ 

    function __construct() 
    { 
     parent::__construct(
       'woocommerce_ndbProducts', 
       __('WP Customs Products', 'ndb'), 
       array('description' => __('This plugin help display a list of customs products on your website.', 'ndb')) 
       ); 
    } 

    public function widget($args, $instance) { 

     extract($args); 
     $title = apply_filters('widget_title', $instance['title']); 
     $ids = $instance['ids']; 
     $arr_id = explode(',',$ids); 
     $query_args = array(
      'post_status' => 'publish', 
      'post_type'  => 'product', 
      'no_found_rows' => 1, 
      'post__in'  => $arr_id 
     ); 

     $r = new WP_Query($query_args); 
     if ($r->have_posts()) { 

      echo $before_widget; 

      if ($title) 
       echo $before_title . $title . $after_title; 

      echo '<ul class="product_list_widget">'; 

      while ($r->have_posts()) { 
       $r->the_post(); 
       global $product; 
       ?> 
        <li> 
         <a href="<?php echo esc_url(get_permalink($product->id)); ?>" title="<?php echo esc_attr($product->get_title()); ?>"> 
          <?php echo $product->get_image(); ?> 
          <?php echo $product->get_title(); ?> 
         </a> 
         <?php if (! empty($show_rating)) echo $product->get_rating_html(); ?> 
         <?php echo $product->get_price_html(); ?> 
        </li> 
       <?php 
      } 

      echo '</ul>'; 

      echo $after_widget; 
     } 

     wp_reset_postdata(); 

     echo $content; 

    } 
    // Widget Backend 

    public function form($instance){ 
     $title = (isset($instance['title'])) ? $instance['title'] : __('Products', 'ndb'); 
     $ids = $instance['ids']; 
     ?> 
     <p> 
      <label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title :'); ?></label> 
      <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo esc_attr($title); ?>" /> 
     </p> 
     <p> 
      <label for="<?php echo $this->get_field_id('ids'); ?>"><?php _e('IDs :'); ?></label> 
      <input class="widefat" id="<?php echo $this->get_field_id('ids'); ?>" name="<?php echo $this->get_field_name('ids'); ?>" type="text" value="<?php echo esc_attr($ids); ?>" /> 
     </p> 
     <?php 

    } 

    public function update($new_instance, $old_instance) { 
     $instance = array(); 
     $instance['title'] = (! empty($new_instance['title'])) ? strip_tags($new_instance['title']) : ''; 
     $instance['ids'] = (! empty($new_instance['ids'])) ? strip_tags($new_instance['ids']) : ''; 
     return $instance; 
    } 


} 



add_action('widgets_init', function(){ 
    register_widget('Bi_Widget_Product'); 
}); 

可以在任何你的WordPress大师的帮助我适应这个，所以我可以过滤在类别而不是产品ID？我会自己做一个尝试，但绝对可以使用你的帮助。

Answer 1

如果您正在寻找的类别都需要使用get_terms()查询如

<?php 
    $terms = get_terms(array ('taxonomy' => 'product_cat', 'hide_empty' => false, 'parent' => 0, 'orderby' => 'description', 'order' => 'ASC')); 

    foreach ($terms as $term) { 
     echo $name = $term->name; 
    } 
?> 

解决方案2：

<?php 

//loop the names of the slugs for the country_categories 
$terms = get_terms(array ('taxonomy' => 'country_categories', 'hide_empty' => false, 'parent' => 0, 'orderby' => 'date', 'order' => 'DESC')); 
foreach ($terms as $term) { 
    //get category slug variables to use in your loop args 
    $slug = $term->slug; 

    $posts_args = array(
    'post_type'   => 'product', 
    'posts_per_page' => -1, 
    'tax_query'   => array(
     'relation' => 'AND', 
     array (
      'taxonomy' => 'product_cat', 
      'field' => 'slug', 
      'terms' => $slug, 
    ) 
    ), 
); 

    $posts_query = new WP_Query($posts_args); 
    if($posts_query->have_posts()): 

    //Each div will have the particular category and its posts. The id and class will also have the slug name 
    echo '<div id="' . $slug . '" class="' . $slug . '"> 
      <h1 class="text-center">' . $term->name . '</h1> 
      while($posts_query->have_posts()): $posts_query->the_post(); 
       get_template_part('template-parts/content', get_post_format()); 
      endwhile; 
    echo '</div>'; 
    endif; 
    } 
    ?> 

Answer 2

我已经生成的小部件，你可以找到我的GitHub代码： https://github.com/Petasos/WC_ProductsByCategory