phpCAS::getUser PHP Method

    public static function getUser()
    {
        phpCAS::_validateClientExists();
        try {
            return self::$_PHPCAS_CLIENT->getUser();
        } catch (Exception $e) {
            phpCAS::error(get_class($e) . ': ' . $e->getMessage());
        }
    }

 public function execute($filterChain)
 {
     $user = $this->getContext()->getUser();
     // We put an LDAP object in the context in order to reuse it later
     $this->getContext()->set('ldap', new uapvLdap());
     // Filters can be called several times (because of internal forwards)
     // Authentication is only done the first time
     if ($this->isFirstCall() && (sfConfig::get('app_cas_server_force_authentication', false) || !$user->isAuthenticated())) {
         // phpCAS is not php5-compliant, we remove php warnings and strict errors
         $errorReporting = ini_get('error_reporting');
         error_reporting($errorReporting & ~E_STRICT & ~E_NOTICE);
         if (sfConfig::get('app_cas_server_debug', false)) {
             phpCAS::setDebug();
         }
         // see /tmp/phpCAS.log
         phpCAS::client(sfConfig::get('app_cas_server_version', CAS_VERSION_2_0), sfConfig::get('app_cas_server_host', 'localhost'), sfConfig::get('app_cas_server_port', 443), sfConfig::get('app_cas_server_path', ''), false);
         // Don't call session_start again,
         // symfony already did it
         //phpCAS::handleLogoutRequests ();
         phpCAS::setNoCasServerValidation();
         phpCAS::forceAuthentication();
         // if necessary the user will be
         // redirected to the cas server
         // At this point the user is authenticated, we log him in
         $user->signIn(phpCAS::getUser());
         // Previous settings can now be restored
         error_reporting($errorReporting);
     }
     // "credential" verification
     parent::execute($filterChain);
 }