How to sort posts automatically by a Last Name included in title
Automated sorting is always a fast way to maintain ordering without any admin intervention Automatic Order.
In this particular scenario, the post titles include a person full name, we need to use the last name to create an automatic ordering.
Once we set-up a sort, we switch to Automatic Order and use the Custom Function Callback functionality.
In this example the callback function name is called “custom_sorting_function_sort_by_last_name”, this should be placed in above field. The function should be included within theme functions.php or a custom plugin:
function custom_sorting_function_sort_by_last_name( $posts_list, $sort_view_id, $orderBy, $query)
{
$list_map = array();
foreach($posts_list as $object_id)
{
$object = get_post($object_id);
$name = explode(" ", $object->post_title);
//remove empty spaces
$name = array_filter($name);
if ( count ($name) > 0 )
{
end($name);
$list_map[$object_id] = current($name);
}
}
//sort the dates ascending
asort($list_map);
$post_list = array_keys($list_map);
return $post_list;
}