This seems to me unnessarcy.

This code should improve it.
if ( $currentUser->isLoggedIn()

{header( 'Etag: ' . $currentUser->attribute( 'contentobject_id' ) ); } if ( $currentUser->isLoggedIn() and !isset( $_COOKIE['is_logged_in'] ) ) { setcookie( 'is_logged_in', 'true', 0, $cookiePath ); }

else if ( !$currentUser->isLoggedIn() and isset( $_COOKIE['is_logged_in'] ) )
{
setcookie( 'is_logged_in', false, 0, $cookiePath );
}