代码实现WordPress主题添加相关产品推荐

<?php

 //get the taxonomy terms of custom post type

 $customTaxonomyTerms = wp_get_object_terms( $post->ID, 'product_category', array('fields' => 'ids') );

 //query arguments

 $args = array(

     'post_type' => 'products',

     'post_status' => 'publish',

     'posts_per_page' => 4,

     'orderby' => 'rand',

     'tax_query' => array(

         array(

            'taxonomy' => 'product_category',

             'field' => 'id',

             'terms' => $customTaxonomyTerms

         )

     ),

     'post__not_in' => array ($post->ID),

 );

 //the query

 $relatedPosts = new WP_Query( $args );

 //loop through query

 if($relatedPosts->have_posts()){

 echo '<div class="related-products">';

 echo '<h3>' . __('Related Products') . '</h3>';

     echo '<ul>';

     while($relatedPosts->have_posts()){ 

         $relatedPosts->the_post();

 ?>

     <li>

      <a href="<?php the_permalink(); ?>"><?php the_post_thumbnail('product_thumb'); ?></a>

      <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>

     </li>

 <?php

     }

     echo '</ul></div>';

 }else{

     //no posts found

 }

 //restore original post data

 wp_reset_postdata();

 ?>