<xmp>UNKNOWN
    //**************************************
    // Name: Get current logged user user_id in Social Engine 4
    // Description:How to get current logged user user_id in Social Engine 4
    As you know that Social engine used Zend framework.
    In any page if you need current logged in user's user_id then you can find it via this
    one piece of line code:
    // By: Amit Kumar Gaur
    //
    //
    // Inputs:None
    //
    // Returns:None
    //
    //Assumes:None
    //
    //Side Effects:None
    //This code is copyrighted and has limited warranties.
    //Please see http://www.Planet-Source-Code.com/xq/ASP/txtCodeId.3017/lngWId.8/qx/vb/scripts/ShowCode.htm
    //for details.
    //**************************************
    
    Find here other code:
    http://amitkgaur.blogspot.in/2012/01/get-current-logged-user-userid-in.html
    $currentUserID=Engine_Api::_()->user()->getViewer()->getIdentity();
    echo $currentUserID;
    now current logged in user's id stored in the variable $currentUserID,
    you can use it in your code as you want.
		</xmp>