saml2-logout.php

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<?php

$cookie_path = dirname(str_replace($_SERVER['PATH_INFO'], '', $_SERVER['PHP_SELF']));

$_GET['client_id'] = substr(rtrim($_SERVER['PATH_INFO'], '/'), strrpos($_SERVER['PATH_INFO'], '/') + 1);
$_SERVER['PATH_INFO'] = substr($_SERVER['PATH_INFO'], 0, strrpos(rtrim($_SERVER['PATH_INFO'], '/'), '/'));

chdir(__DIR__);

$ilias_main_directory = './';

$i = 0;
while (!is_file($ilias_main_directory . 'ilias.ini.php') && $i < 20) {
    $ilias_main_directory .= '../';
    ++$i;

    $cookie_path = dirname($cookie_path);
}
chdir($ilias_main_directory);

if (!is_file(getcwd() . '/ilias.ini.php')) {
    die('Please ensure ILIAS is installed!');
}

$cookie_path .= (!preg_match("/[\/|\\\\]$/", $cookie_path)) ? "/" : "";

if (isset($_GET["client_id"])) {
    if ($cookie_path === "\\") {
        $cookie_path = '/';
    }

    setcookie('ilClientId', $_GET['client_id'], 0, $cookie_path, '');
    $_COOKIE['ilClientId'] = $_GET['client_id'];
}
define('IL_COOKIE_PATH', $cookie_path);

require_once 'Services/Context/classes/class.ilContext.php';
ilContext::init(ilContext::CONTEXT_SAML);

require_once 'Services/Init/classes/class.ilInitialisation.php';
ilInitialisation::initILIAS();

$factory = new ilSamlAuthFactory();
$auth = $factory->auth();

ilSession::setClosingContext(ilSession::SESSION_CLOSE_USER);
$GLOBALS['DIC']['ilAuthSession']->logout();

$GLOBALS['ilAppEventHandler']->raise(
    'Services/Authentication',
    'afterLogout',
    [
        'username' => $GLOBALS['DIC']->user()->getLogin(),
    ]
);

require_once 'libs/composer/vendor/simplesamlphp/simplesamlphp/modules/saml/www/sp/saml2-logout.php';