sspmod_adfs_IdP_ADFS::receiveLogoutMessage PHP Method

    public static function receiveLogoutMessage(SimpleSAML_IdP $idp)
    {
        // if a redirect is to occur based on wreply, we will redirect to url as
        // this implies an override to normal sp notification
        if (isset($_GET['wreply']) && !empty($_GET['wreply'])) {
            $idp->doLogoutRedirect(\SimpleSAML\Utils\HTTP::checkURLAllowed($_GET['wreply']));
            assert(FALSE);
        }
        $state = array('Responder' => array('sspmod_adfs_IdP_ADFS', 'sendLogoutResponse'));
        $assocId = NULL;
        // TODO: verify that this is really no problem for:
        //       a) SSP, because there's no caller SP.
        //       b) ADFS SP because caller will be called back..
        $idp->handleLogoutRequest($state, $assocId);
    }

<?php

/**
 * ADFS PRP IDP protocol support for simpleSAMLphp.
 *
 * @author Hans Zandbelt, SURFnet bv, <*****@*****.**>
 * @package simpleSAMLphp
 */
SimpleSAML_Logger::info('ADFS - IdP.prp: Accessing ADFS IdP endpoint prp');
$metadata = SimpleSAML_Metadata_MetaDataStorageHandler::getMetadataHandler();
$idpEntityId = $metadata->getMetaDataCurrentEntityID('adfs-idp-hosted');
$idp = SimpleSAML_IdP::getById('adfs:' . $idpEntityId);
if (isset($_GET['wa'])) {
    if ($_GET['wa'] === 'wsignout1.0') {
        sspmod_adfs_IdP_ADFS::receiveLogoutMessage($idp);
    } else {
        if ($_GET['wa'] === 'wsignin1.0') {
            sspmod_adfs_IdP_ADFS::receiveAuthnRequest($idp);
        }
    }
    assert('FALSE');
} elseif (isset($_GET['assocId'])) {
    // logout response from ADFS SP
    $assocId = $_GET['assocId'];
    /* Association ID of the SP that sent the logout response. */
    $relayState = $_GET['relayState'];
    /* Data that was sent in the logout request to the SP. Can be null. */
    $logoutError = NULL;
    /* NULL on success, or an instance of a SimpleSAML_Error_Exception on failure. */
    $idp->handleLogoutResponse($assocId, $relayState, $logoutError);
}