SimpleSAML_Utilities::validateXMLDocument PHP Method

    public static function validateXMLDocument($message, $type)
    {
        \SimpleSAML\Utils\XML::checkSAMLMessage($message, $type);
    }

function convert_metadata($xmldata)
{
    $config = SimpleSAML_Configuration::getInstance();
    if ($xmldata) {
        $xmldata = htmlspecialchars_decode($xmldata);
        SimpleSAML_Utilities::validateXMLDocument($xmldata, 'saml-meta');
        $entities = SimpleSAML_Metadata_SAMLParser::parseDescriptorsString($xmldata);
        foreach ($entities as &$entity) {
            $entity = array('shib13-sp-remote' => $entity->getMetadata1xSP(), 'shib13-idp-remote' => $entity->getMetadata1xIdP(), 'saml20-sp-remote' => $entity->getMetadata20SP(), 'saml20-idp-remote' => $entity->getMetadata20IdP());
        }
        $output = array($entity['saml20-sp-remote']['entityid'] => $entity['saml20-sp-remote']);
    } else {
        $xmldata = '';
        $output = array();
    }
    return $output;
}