SAML2\AuthnRequest::parseScoping PHP Method

    protected function parseScoping(\DOMElement $xml)
    {
        $scoping = Utils::xpQuery($xml, './saml_protocol:Scoping');
        if (empty($scoping)) {
            return;
        }
        $scoping = $scoping[0];
        if ($scoping->hasAttribute('ProxyCount')) {
            $this->ProxyCount = (int) $scoping->getAttribute('ProxyCount');
        }
        $idpEntries = Utils::xpQuery($scoping, './saml_protocol:IDPList/saml_protocol:IDPEntry');
        foreach ($idpEntries as $idpEntry) {
            if (!$idpEntry->hasAttribute('ProviderID')) {
                throw new \Exception("Could not get ProviderID from Scoping/IDPEntry element in AuthnRequest object");
            }
            $this->IDPList[] = $idpEntry->getAttribute('ProviderID');
        }
        $requesterIDs = Utils::xpQuery($scoping, './saml_protocol:RequesterID');
        foreach ($requesterIDs as $requesterID) {
            $this->RequesterID[] = trim($requesterID->textContent);
        }
    }