Horde_Form::onSubmit PHP Method

    function onSubmit(&$vars)
    {
        /* Loop through all vars and check if there's anything to do on
         * submit. */
        $variables = $this->getVariables();
        foreach ($variables as $var) {
            $var->type->onSubmit($var, $vars);
            /* If changes to var being tracked don't register the form as
             * submitted if old value and new value differ. */
            if ($var->getOption('trackchange')) {
                $varname = $var->getVarName();
                if (!is_null($vars->get('formname')) && $vars->get($varname) != $vars->get('__old_' . $varname)) {
                    $this->_submitted = false;
                }
            }
        }
    }