Neos\Flow\Mvc\Routing\IdentityRoutePart::findValueToMatch PHP Метод

    protected function findValueToMatch($routePath)
    {
        if (!isset($routePath) || $routePath === '' || $routePath[0] === '/') {
            return '';
        }
        if ($this->getUriPattern() === '') {
            return parent::findValueToMatch($routePath);
        }
        $regexPattern = preg_quote($this->getUriPattern(), '/');
        $regexPattern = preg_replace('/\\\\{[^}]+\\\\}/', '[^\\/]+', $regexPattern);
        if ($this->splitString !== '') {
            $regexPattern .= '(?=' . preg_quote($this->splitString, '/') . ')';
        }
        $matches = [];
        preg_match('/^' . $regexPattern . '/', trim($routePath, '/'), $matches);
        return isset($matches[0]) ? $matches[0] : '';
    }