Ошибка при добавлении

Warning: Missing argument 1 for html_time(), called in /home/umarov/kavkaz.ws/system/controllers/messages/frontend.php on line 194 and defined in /home/umarov/kavkaz.ws/system/libs/html.helper.php on line 322
 
Warning: Cannot modify header information - headers already sent by (output started at /home/umarov/kavkaz.ws/system/libs/html.helper.php:322) in /home/umarov/kavkaz.ws/system/core/controller.php on line 559
 
Warning: Cannot modify header information - headers already sent by (output started at /home/umarov/kavkaz.ws/system/libs/html.helper.php:322) in /home/umarov/kavkaz.ws/system/core/controller.php on line 561

 
function html_time($date){
    $timestamp = strtotime($date);
    return date('H:i', $timestamp);
}
 

 
    /**
     * Редирект на указанный адрес
     * @param str $url
     */
    public function redirect($url, $code=303){
        if ($code == 301){
            header('HTTP/1.1 301 Moved Permanently');
        } else {
           header('HTTP/1.1 303 See Other');
        }
       header('Location: '.$url);
        $this->halt();
    }
 

function html_time($date=false){
    $timestamp = $date ? strtotime($date) : time();
    return date('H:i', $timestamp);
}