How do I get user id and pass to view ?

Before I got a problem, I used $_COOKIE['ck_login_id_20'] to get user id.

I don't know why $_COOKIE['ck_login_id_20'] is gone.

I have my custom layout and view, in view I put <iframe> that call page.php to show something.

In my idea, I want to get user id, then pass into my-view and put in my iframe like this <iframe src="page.php?id={{ user_id }}" class="myiFrame" frameborder="0">

I found SugarCRM 7 - Passing Data to Views It may be good way.

Do you have any idea?

SugarCRM Professional, Version 7.5.2.0

Thanks,

M