Wordpress 文章多分类筛选

效果：实现商店类似的分类筛选效果 如图

functions.php 中方法 引入一个.class 文件 require_once(TEMPLATEPATH . '/extend/verify.php');

主要是这个方法做一下验证 $encryption->isArticle($value->ID,$class_id);

    add_action('wp_ajax_nopriv_goodsList', 'goodsList');
    add_action('wp_ajax_goodsList', 'goodsList');
    function goodsList(){
        if(!isset($_POST['class_id'])){
            echo jsonArray(400,'','缺少分类id');
            exit;
        }
        $class_id = $_POST['class_id
        $page = isset($_POST['page']) ? $_POST['page'] : 1;
        $size = isset($_POST['size'])    ?  $_POST['size'] : 8;
        $res = [];
        $offset =$size*($page-1
        $args1 = array(
            'category' => $class_id,
            'post_status'=>'publish',
            'numberposts'=>-1
        );
        $args = array(
            'category' => $class_id,
            'post_status'=>'publish',
            'order'    => 'DESC',
            'numberposts'=>$size,
            'offset'=>$offset,
        );
        $all_count= get_posts($args1);
            $posts = get_posts($args);
        $encryption = new SymmetricEncryption();
        if($posts){
            foreach ($posts as $key => $value) {
                $res_post = $encryption->isArticle($value->ID,$class_id);
                if($res_post){
                    $images_list = get_field('product_gallery',$value->ID);
                    $res[$key]['image'] = $images_list ?  $images_list[0]['url'] : '';
                    $res[$key]['id'] = $value->ID;
                    $res[$key]['post_date'] = $value->post_date;
                    $res[$key]['post_title'] = $value->post_title;
                    $res[$key]['post_name'] = $encryption->getClassName($value->ID);
                }
            }
        }
        $data['data'] = $res;
        $data['pages'] = ceil(count($all_count) / $size);
        echo jsonArray(200,$data,'Success');
        exit;
    }

verify.php 文件 实现逻辑:获取到当前文章的当前分类和分类的父级分类，和前端传的分类做一个差集校验。

<?php
/**
 * 2023-09-01
 * xitianci
 * 当前为接口扩展方法文件
 */
class SymmetricEncryption {
  
    /**
     * 筛选文章是否符合分类
     * post_id=文章id
     */
    public function isArticle($post_id,$class_str=''){
        //获取文章所有分类id
        $class_array = get_the_category($post_id);
        if(!$class_array){
            return false;
        }
        $class_ids = [];
        foreach($class_array as $val){
            $class_ids[] = $val->term_id;
            $class_ids[] = $val->parent;
        }
        //判断传输的分类是否全部符合当前文章。
        $now_class = explode(',',$class_str);

        $diff = array_diff($now_class, $class_ids);
        if (empty($diff)) {
          return true;
        } else {
           return false;
        }
    }
}
?>