WordPress Get unique custom field values in a list

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I have a whole list of directors but would like to display only their unique names not duplicates. Something that looks like

director A, Director B, Director C,…

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NOT

director A, Director A, Director B, Director C, Director C,…

I try to do this with array_unique but it doesn’t seem to put any data in the arrays.

I see that the foreach loop displays all the names of the directors but somehow the array $alldirectors stays empty.

Here is the code I’m using. 

<?php
$resume = get_posts(array(
          'post_type' =>'resume', 
          'numberposts'=>-1, 
          'meta_key' => 'director', 
          'meta_value' => '' 
));

$alldirectors = array();
foreach( $resume as $post ) {
      $director = get_post_meta( $post->ID, 'director', true );
 }

 $directors = array_unique($alldirectors);
 foreach ($directors as $director) {
  echo $directors;
 }
 ?>

It’s probably something simple that I’m missing but I’m new to php and wordpress Thanks for all your help.

Post Views: 1

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3 comments

  1. Try to use standard query like this

    global $wpdb; (this is required when are you inside the function)

$values = $wpdb->get_results("SELECT DISTINCT meta_value FROM $wpdb->postmeta pm, $wpdb->post p WHERE meta_key  = 'director' and pm.post_id=p.ID  and p.post_type='resume' ",ARRAY_A);

print_r($values);

  2. You are not storing the directors name in $alldirectors therefore it is empty try this one 

    $alldirectors = array();
foreach( $resume as $post ) {
    $alldirectors[]=   get_post_meta( $post->ID, 'director', true );
 }

    And then use your loop

     $directors = array_unique($alldirectors);
 foreach ($directors as $director) {
  echo $directors;
 }

  3. array_unique will do what you want it to. However looking at your code you have not assigned any data to the $alldirectors array. Try this line:

    $alldirectors = get_post_meta(blah blah);

    instead of 

    $director = get_post_meta(blah blah);