authentication.php
protected function findRealmFromUrl($url)
    {
        if (! isset($this->realms[$url->getHost()])) {
            return false;
        }
        foreach ($this->realms[$url->getHost()] as $name => $realm) {
            if ($realm->isWithin($url)) {
                return $realm;
            }
        }

        return false;
    }
protected function findRealmFromUrl($url)
    {
        if (! isset($this->realms[$url->getHost()])) {
            return false;
        }
        foreach ($this->realms[$url->getHost()] as $name => $realm) {
            if ($realm->isWithin($url)) {
                return $realm;
            }
        }

        return false;
    }
Finds the name of the realm by comparing URLs.

@param SimpleUrl $url        URL to test.

@return SimpleRealm          Name of realm.