kernel/core/Router.php
public function runHttpErrorPage(int $iError)
    {
        if (isset($_SERVER) && isset($_SERVER['HTTP_HOST'])) {

            foreach (Config::get('route') as $sHost => $oHost) {

                if ((!strstr($sHost, '/') && $sHost == $_SERVER['HTTP_HOST'])
                    || (strstr($sHost, '/') && strstr($_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'], $sHost))) {

                    $this->_oRoutes = $oHost->routes;

                    if (strstr($sHost, '/') && strstr($_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'], $sHost)) {

                        $this->_sBaseUri = preg_replace('#^[^/]+#', '', $sHost);
                    }

                    $sHttpErrorPageName = '_getPage'.iError;
                    $this->$sHttpErrorPageName();
                }
            }
        }
    }
public function runHttpErrorPage(int $iError)
    {
        if (isset($_SERVER) && isset($_SERVER['HTTP_HOST'])) {

            foreach (Config::get('route') as $sHost => $oHost) {

                if ((!strstr($sHost, '/') && $sHost == $_SERVER['HTTP_HOST'])
                    || (strstr($sHost, '/') && strstr($_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'], $sHost))) {

                    $this->_oRoutes = $oHost->routes;

                    if (strstr($sHost, '/') && strstr($_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'], $sHost)) {

                        $this->_sBaseUri = preg_replace('#^[^/]+#', '', $sHost);
                    }

                    $sHttpErrorPageName = '_getPage'.iError;
                    $this->$sHttpErrorPageName();
                }
            }
        }
    }
run the error http page

@access public
@param  int iError http error
@return void