1The hooks system allows you to extend WHMCS functionality by placing files in the /includes/hooks directory.
  2WHMCS has a variety of hook points that run when specific events occur (for example, generating an invoice).
  3To use this system, write your own code and register it with a hook point. WHMCS will execute that code when the hook runs.
  4For a list of available hook points, see https://developers.whmcs.com/hooks/hook-index/.
  5
  6To use the example hook code below, copy the code, beginning with '<?php', and paste it into a file in the /includes/hooks directory.
  7The filename must use the '.php' extension (for example, create_forum_account.php).
  8Filenames beginning with an underscore '_' will not be loaded.
  9
 10<?php
 11
 12if (!defined('WHMCS'))
 13    die('You cannot access this file directly.');
 14
 15function create_forum_account($vars) {
 16
 17    $firstname = $vars['firstname'];
 18    $lastname = $vars['lastname'];
 19    $email = $vars['email'];
 20
 21    // Add the code to create a remote forum account here.
 22
 23}
 24
 25add_hook('ClientAdd', 1, 'create_forum_account');
 26