Add Custom Columns to Admin Tabe of Custom Posts

Hi guys!
I used CPT UI and ACF to create a CPT with a few custom fields. I now would love to add those columns to my admin post page for that custom post.

I wrote adjusted the following code:

// Tabellenkopf und -fuß um Felder erweitern
add_filter('manage_edit-juschu_imp_kundnrs','kb_edit_admin_kundnrs') ;
function kb_edit_admin_kundnrs($kundnrs) {
  $kundnrs = array(
    'cb' => '<input type="checkbox" />',
    'title' => __('Title'),
    'kundnr' => Kundennummer,
    'author' => __('Author'),
    'comments' => '<span class="vers comment-grey-bubble" title="' . __( 'Comments' ) . '"><span class="screen-reader-text">' . __( 'Comments' ) . '</span></span>',
    'date' => __('Date')
  );
  return $kundnrs;
}

// Inhalte aus benutzerdefinierten Feldern auslesen und den Spalten hinzufügen
add_action ('manage_juschu_imp_posts_custom_kundnr','kb_post_custom_kundnrs');
function kb_post_custom_kundnrs($kundnr) {
  global $post;
  $custom = get_post_custom();
  switch ($kundnr) {
    case "kundnr":
      $kb_field = get_post_meta($post->ID, 'knr', true );
      echo $kb_field;
    break;
  }
}

// Hinzugefügte Spalten sortierbar machen
add_filter( 'manage_edit-juschu_imp_sortable_kundnrs', 'kb_post_sortierbare_kundnrs' );
function kb_post_sortierbare_kundnrs( $kundnrs ) {
  $kundnrs['kundnr'] = 'knr';
  return $kundnrs;
}

Which i got here: https://blog.kulturbanause.de/2016/11/wordpress-admin-columns-um-custom-fields-erweitern/

But I can’t get it to work. I am working on my localhost, so i cant provide you with a link. Can you please tell me where to post that code? functions.php didn_t work.

Thank you.

• This topic was modified 7 years ago by fabienneRedUmb.