Grav\Plugin\Admin\AdminBaseController::redirect PHP Метод

    public function redirect()
    {
        if (!$this->redirect) {
            return;
        }
        $base = $this->admin->base;
        $this->redirect = '/' . ltrim($this->redirect, '/');
        $multilang = $this->isMultilang();
        $redirect = '';
        if ($multilang) {
            // if base path does not already contain the lang code, add it
            $langPrefix = '/' . $this->grav['session']->admin_lang;
            if (!Utils::startsWith($base, $langPrefix . '/')) {
                $base = $langPrefix . $base;
            }
            // now the first 4 chars of base contain the lang code.
            // if redirect path already contains the lang code, and is != than the base lang code, then use redirect path as-is
            if (Utils::pathPrefixedByLangCode($base) && Utils::pathPrefixedByLangCode($this->redirect) && substr($base, 0, 4) != substr($this->redirect, 0, 4)) {
                $redirect = $this->redirect;
            } else {
                if (!Utils::startsWith($this->redirect, $base)) {
                    $this->redirect = $base . $this->redirect;
                }
            }
        } else {
            if (!Utils::startsWith($this->redirect, $base)) {
                $this->redirect = $base . $this->redirect;
            }
        }
        if (!$redirect) {
            $redirect = $this->redirect;
        }
        $this->grav->redirect($redirect, $this->redirectCode);
    }