yii\web\ErrorHandler::getTypeUrl PHP Method

    protected function getTypeUrl($class, $method)
    {
        if (strpos($class, 'yii\\') !== 0) {
            return null;
        }
        $page = $this->htmlEncode(strtolower(str_replace('\\', '-', $class)));
        $url = "http://www.yiiframework.com/doc-2.0/{$page}.html";
        if ($method) {
            $url .= "#{$method}()-detail";
        }
        return $url;
    }