whmcsZimbraSingle/hooks.php.bak

<?php
if (!defined("WHMCS"))
    die("This file cannot be accessed directly");
require_once dirname(__FILE__) . '/zimbraSingle.inc';

add_hook("ShoppingCartValidateProductUpdate", 1, "validate_emailaddress_zimbraSingle");

function validate_emailaddress_zimbraSingle($vars)
{
    $keys = array('givenname', 'sn', 'mailname', 'domain', 'password');
    $userdata = array_combine($keys, $vars["customfield"]);
    $response = zimbraSingleDoesEMailExist($userdata['mailname'], $userdata['domain']);
    if ($response == true) {
        return 'Mailbox ' . $userdata['mailname'] . '@' . $userdata['domain'] . ' already exists, choose another. ';
    } else {
        return zimbraSingleCheckPassword($userdata['password']);
    }
}