Custom Column Sorting Example Wordpress Admin

custom-column-wp-admin.php

<?php
// *
// Show Alternate ID column in admin
// *

add_filter('manage_posts_columns', 'add_alternate_id_columns', 10, 2);
function add_alternate_id_columns($posts_columns, $post_type)
{
  if( $post_type == 'offer-download' ) {
    $posts_columns['offer_download_id'] = 'Internal ID';
  }
  return $posts_columns;
}

add_action('manage_posts_custom_column', 'display_alternate_id_columns', 10, 2);
function display_alternate_id_columns($column_name, $post_id)
{
  if ('offer_download_id' == $column_name) {
    echo get_field('offer_download_id', $post_id);
  }
}

function alternate_id_sortable( $columns ) {
  $columns['offer_download_id'] = 'alternate_id';

  return $columns;
}
add_filter( 'manage_edit-offer-download_sortable_columns', 'alternate_id_sortable' );

function alternate_id_orderby( $vars ) {
  if ( isset( $vars['orderby'] ) && 'alternate_id' == $vars['orderby'] ) {
    $vars = array_merge( $vars, array(
      'meta_key' => 'offer_download_id',
      'orderby' => 'meta_value_num'
    ) );
  }
  return $vars;
}
add_filter( 'request', 'alternate_id_orderby' );