如何才能使此Php WP_Query返回类别仅一次?

时间:2019-01-28 15:00:54

标签: php wordpress

此循环返回每个帖子的类别,并多次显示。相反,我只想显示一次类别,这是按类别过滤的功能。

<div id="filter-box" class="filter-box">

        <?php 
            $args = array (
                'post_type'     => "post",
                'post_status'   => "publish",
                'order'     => 'ASC',
                'orderby'   => 'title' ,
                'posts_per_page'    => -1);

        $all_query = new WP_Query($args);

            if ($all_query->have_posts()): 
               while ($all_query->have_posts()): 
                  $all_query->the_post(); 
          ?>
            <a href="#" class="filter-btn" data-cat="<?php get_cat($post->ID); ?>"><?php get_cat($post->ID); ?></a> 
            <?php  
                 endwhile;  
                       endif;
                         wp_reset_postdata();
        ?>

</div>

这是来自functions.php的功能

 function get_cat($post_id) {
    $category_detail=get_the_category($post_id);
    foreach($category_detail as $cd) {
      echo $cd->cat_name;
    }
  }

每个类别只显示一次类别。

1 个答案:

答案 0 :(得分:0)

请将您的代码修改为:

 <?php 
            $args = array (
                'post_type'     => "post",
                'post_status'   => "publish",
                'order'     => 'ASC',
                'orderby'   => 'title' ,
                'posts_per_page'    => -1);

        $all_query = new WP_Query($args);
         $tempArr = array();
            if ($all_query->have_posts()): 
               while ($all_query->have_posts()): 
                  $all_query->the_post();
                  if(!in_array($post->ID , $tempArr)){ // check if array has ID not display
                  array_push($tempArr, $post->ID); //push postID in array
          ?>
            <a href="#" class="filter-btn" data-cat="<?php get_cat($post->ID); ?>"><?php get_cat($post->ID); ?></a> 
            <?php  
                 }
                 endwhile;  
                       endif;
                         wp_reset_postdata();
        ?>

说明::请将数组声明为$tempArr = array();,然后检查$temArr数组是否具有该postID(如果没有),然后显示类别并将其推入数组。