yii\filters\HostControl::beforeAction PHP Метод

    public function beforeAction($action)
    {
        $allowedHosts = $this->allowedHosts;
        if ($allowedHosts instanceof \Closure) {
            $allowedHosts = call_user_func($allowedHosts, $action);
        }
        if ($allowedHosts === null) {
            return true;
        }
        if (!is_array($allowedHosts) && !$allowedHosts instanceof \Traversable) {
            $allowedHosts = (array) $allowedHosts;
        }
        $currentHost = Yii::$app->getRequest()->getHostName();
        foreach ($allowedHosts as $allowedHost) {
            if (fnmatch($allowedHost, $currentHost)) {
                return true;
            }
        }
        if ($this->denyCallback !== null) {
            call_user_func($this->denyCallback, $action);
        } else {
            $this->denyAccess($action);
        }
        return false;
    }