In page one,

$add_id2=implode(',',$add_id);
//result is 1,4

$item_type2=implode(',',$item_type_2);
//result is 8,16

$final_total2=implode(',',$final);
//result is 150,430

I pass these values via URL to the page two and store them in session.

$_SESSION['cart'][$car]=
    array ('car'=>$car,
           'loc_1'=>$location,
           array (
                  'addon_id'=>$a_id,
                  'item_type'=>$item_type2,
                  'final_total'=>$final_t
                  )
           );

I call them like this,

foreach($_SESSION['cart'] as $cart=>$things)
    {
        //display main array value like car id and location id
        echo $cart;

        foreach($things as $thing_1=>$thing_2)
            {
                foreach($thing_2['addon_id'] as $thi_2=>$thi_4)
                    {
                        //to display addons item for the car id
                        //this is the id for each addon under the above car 
                        //echo $thi_2;
                        //this is to echo addon id
                        $thi_4;
                    }
            }
    }

The above loop works . the addon items array loops through inside main array which is car. If there were two addon items chosen then the addon array will loop twice. Now al I need to do is, How to make $item_type2 and $final_total2 display the value according to the addon id? PS: Same addon items can be chosen multiple times. They are identified uniquely by id(//echo $thi_2;). Thanks.