php - Add another dimension into array cart -

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i have shopping cart, works fine, store type of goods (for example color, size, etc.).

here function gets items shopping cart

public static function getcart() {         if((isset($_session['cart'])) && count($_session['cart'])>0) {             $ids = "";             foreach($_session['cart'] $id => $quantity) {                 $ids = $ids . $id . ",";             }              $ids = rtrim($ids, ',');              $dotaz = dibi::fetchall("select * eshop_products idproduct in ({$ids})");             return $dotaz;         } else {             //do nothing         }     }

and function adds items shopping cart

public static function addtocart($data) {          $id = $data['id'];          $quantity = $data['qty'];          $varianta = $data['varianty']; //this need add session array           if(!isset($_session['cart'])) {             $_session['cart'] = array();         }           if(isset($_session['cart'][$id])) {             $_session['cart'][$id] += $quantity;         } else {             $_session['cart'][$id] = $quantity;         }        }

is there easy way that? googled tutorials, still no success.

thank you.

maybe hint you:

$id = $data['id'];  $quantity = $data['qty'];  $varianta = $data['varianty']; //this need add session array  $cart = array();  array_push($cart, array(   'id' => $id,   'quantity' => $quantity,   'varianta' => $varianta ));

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