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1. wpstudent
   Member
   Posted 1 year ago #
   

   I want to display a list of related post titles as links at the bottom of a post.
   I am storing a comma delimited list of post id's under a custom field called related - example: 78,167
   At the bottom of single.php, under the main content output, I would like the list of related post titles.
   Here are the 2 things I have tried:
   

   <!-- Option 1 -->
   <? if (get_post_meta($post->ID, 'related', true)) { ?>
   <? $posts=get_post_meta($post->ID, 'related', true);  ?>
   <ul><?php wp_list_pages('include='.$posts.'&title_li='); ?></ul>
   <? } ?>
   <!-- Option 2 -->
   <? if (get_post_meta($post->ID, 'related', true)) { ?>
   <ul>
   <? $myposts=get_post_meta($post->ID, 'related', true);  ?>
   <? foreach( $myposts as $post ) : setup_postdata($post); ?>
   	<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
   <?php endforeach; ?>
   </ul>
   <? } ?>

   Can someone point me in the right direction?

2. alchymyth
   The Sweeper & Moderator
   Posted 1 year ago #
   

   http://codex.wordpress.org/Template_Tags/get_posts

   example:

   <?php if ( $myposts = get_post_meta($post->ID, 'related', true) ) {
   $myposts = get_posts( array('post__in' => explode(',',$myposts)) );
   if( $myposts ) { ?>
   <ul>
   <?php foreach( $myposts as $post ) : setup_postdata($post); ?>
   	<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
   <?php endforeach; ?>
   </ul>
   <?php wp_reset_postdata(); }
   } ?>

   (the post list will be sorted by date, not by the sequence in your custom field)

3. wpstudent
   Member
   Posted 1 year ago #
   

   That worked perfectly!

   I really appreciate that. I had spent a lot of time looking at the get_posts & wp_list_pages functions but just got stuck. I am not exactly sure how the array('post__in' => explode(',',$myposts)) works but that was the key to making this work. I will definitely do some more research on that part of the code.

   Thanks again!

4. alchymyth
   The Sweeper & Moderator
   Posted 1 year ago #
   

   how the array('post__in' => explode(',',$myposts)) works

   the explode() php function transforms a string into an array by breaking the string at the given substrings;
   the substring works as a kind of dynamite stick, i.e. telling the function to break the string at those positions (and loosing them n the process)
   http://php.net/manual/en/function.explode.php

   'post__in' is one of the post parameters of WP_Query:
   http://codex.wordpress.org/Class_Reference/WP_Query#Post_.26_Page_Parameters

   tip:
   anytime I am not sure about any function I see in a code, I web-search for 'functionname() php' or 'function_name() wordpress' or 'html-tag html' etc.

   this usually comes up with a link to one of those general resources are:
   http://www.php.net/
   http://codex.wordpress.org/
   http://www.w3schools.com/

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