2.3/reorder_8php_source.html

 <?php
 $ordering = get_input('fieldorder');

 elgg_save_config('profile_custom_fields', $ordering);
elgg_save_config
elgg_save_config($name, $value, $site_guid=0)
Save a configuration setting.
Definition: configuration.php:133

get_input
get_input($variable, $default=null, $filter_result=true)
Get some input from variables passed submitted through GET or POST.
Definition: input.php:27

$ordering
$ordering
Elgg profile plugin reorder fields.
Definition: reorder.php:7