Why is the same item added to the cart again and again?

Question

Yii

public function actionTocart($id, $name, $price, $count = 1){
        $session = Yii::$app->session;
        $session->open();
        $_SESSION['cart'][$id]['name'] = $name;
        $_SESSION['cart'][$id]['price'] = $price;
        $_SESSION['cart'][$id]['count'] = $count;
        $this->redirect("/cart");
    }

has the following code. why when adding a new product to the cart will replace the old one. and actually always 1 product (last)

Answer 1

code picture is so convenient!
ps Why climb directly into the session?