hooks.php

<?php
/**
 * WHMCS SDK Sample Addon Module Hooks File
 *
 * Hooks allow you to tie into events that occur within the WHMCS application.
 *
 * This allows you to execute your own code in addition to, or sometimes even
 * instead of that which WHMCS executes by default.
 *
 * @see https://developers.whmcs.com/hooks/
 *
 * @copyright Copyright (c) WHMCS Limited 2017
 * @license http://www.whmcs.com/license/ WHMCS Eula
 */

// Require any libraries needed for the module to function.
// require_once __DIR__ . '/path/to/library/loader.php';
//
// Also, perform any initialization required by the service's library.

/**
 * Register a hook with WHMCS.
 *
 * This sample demonstrates triggering a service call when a change is made to
 * a client profile within WHMCS.
 *
 * For more information, please refer to https://developers.whmcs.com/hooks/
 *
 * add_hook(string $hookPointName, int $priority, string|array|Closure $function)
 */
add_hook('ClientEdit', 1, function(array $params) {
    try {
        // Call the service's function, using the values provided by WHMCS in
        // `$params`.
    } catch (Exception $e) {
        // Consider logging or reporting the error.
    }
});