public function addTpl() {
    global $zip;

    if(!isset($_GET['url']) || empty($_GET['url'])) {
        $_GET['url'] = 'index';
    }

    $front = '_zip/_templates/_front/'. $zip['Template']['Front'];
    $back  = '_zip/_templates/_back/'. $zip['Template']['Back'];

    if(strpos($_GET['url'], 'backend') !== false) {
       if(file_exists($back . '/')) {
            if(file_exists($back . '/index.php')) {
                ob_start();
                include($back . '/index.php');
                $this->tpl .= ob_get_contents();
                ob_end_clean();
            } else {
                if($zip['Template']['Front'] == 'Refresh/multi-page') {
                    ob_start();
                    include($back . '/404.php');
                    $this->tpl .= ob_get_contents();
                    ob_end_clean();
                } else {
                    die(zipError('File Not Found', 'The file <b>' . secure($_GET['url']) . '</b> could not be found. Please re-check the URL; If you were directed here using a link, please report that link <b><a href="mailto:IntactDev@gmail.com">here<a/>.</b>'));
                }
            }
        } else {
            die(zipError('Template Not Found', 'The template <b>' . $zip['Template']['Front'] . '</b> could not be found. Please check your configuration file for a mistake.'));
        }
    } else {
        if(file_exists($front. '/')) {
            if(file_exists($front. '/' . secure($_GET['url']) . '.php')) {
                ob_start();
                include($front. '/' . secure($_GET['url']) . '.php');
                $this->tpl .= ob_get_contents();
                ob_end_clean();
            } else {
                if($zip['Template']['Front'] == 'Refresh/multi-page') {
                    ob_start();
                    include($front. '/404.php');
                    $this->tpl .= ob_get_contents();
                    ob_end_clean();
                } else {
                    die(zipError('File Not Found', 'The file <b>' . secure($_GET['url']) . '</b> could not be found. Please re-check the URL; If you were directed here using a link, please report that link <b><a href="mailto:IntactDev@gmail.com">here<a/>.</b>'));
                }
            }
        } else {
            die(zipError('Template Not Found', 'The template <b>' . $zip['Template']['Front'] . '</b> could not be found. Please check your configuration file for a mistake.'));
        }
    }
}