how to store simply multi array in session laravel 5.6 - php

Question

i store one array in to session('cart') last click [add to cart] , when i add another array in session('cart'), but it store one array then session can not save both.
help me !
public function addtocart(Request $req,$id){
$product = _prod::find($id)->toArray();
$item = [
'name' => $product['pName'],
'description' => $product['pDesc'],
'price' => $product['pPrice'],
];
$cart = [
'qtyTotal' => 0,
'priceTotal' => 0,
'item' => [$item]
];
$req->session()->put('cart',$cart);
$a = session()->get('cart');
}

Answer 1

change this
$req->session()->put('cart',$cart);
$a = session()->get('cart');
dd($a);
to this:
$cartvalues[] = $cart;
$req->session()->put('cart',$cartvalues);
$a = session('cart');
dd($a);
because you keep overwriting the previous value inside the session cart

Answer 2

Here you are overwriting cart variable in session every time you add a new item. So store cart items as an array and add item to array. Code should be:
public function addtocart(Request $req, $id) {
$product = _prod::find($id)->toArray();
$item = [
'name' => $product['pName'],
'description' => $product['pDesc'],
'price' => $product['pPrice'],
];
$cart = [
'qtyTotal' => 0,
'priceTotal' => 0,
'item' => [$item]
];
$cartItems = session()->get('cart');
if (empty($cartItems)) {
$cartItems = [];
}
$cartItems[] = $cart;
$req->session()->put('cart', $cartItems);
return view($cartItems);
}

Answer 3

Here is the simple example to update your cart in your case
`
public function addtocart(Request $req,$id){
//return redirect('Resouce/product');
$product = _prod::find($id)->toArray();
$item = [
'name' => $product['pName'],
'description' => $product['pDesc'],
'price' => $product['pPrice'],
];
if($req->session()->has('cart')){
$oldCart = $req->session()->get('cart');
$newCart = [
'qtyTotal' => 0,
'priceTotal' => 0,
'item' => array_merge($item,$oldCart['item'])
];
$req->session()->put('cart',$newCart);
}
$cart = [
'qtyTotal' => 0,
'priceTotal' => 0,
'item' => [$item]
];
$req->session()->put('cart',$cart);
$a = session()->get('cart');
dd($a);
}`