Error In Session : Undefined Index

[Interista]

Hello ,

I got error that said , I got this error only in the first set session , after that the error disappear .

So as example i send ( cart.php?add=302 ) in URL , And this is what I got :

Undefined index: cart_302 in C:\wamp\www\cart.php on line [i]9[/i]

 

 

I'm using session for store my cart info , this is my session create code :

 

 

if (isset($_GET['add'])){
$_SESSION['cart_'.$_GET['add']]+='1';
}

[Interista]

I think I fixed it

 

like this way :

 

if (isset($_GET['add'])){
if (!isset($_SESSION['cart_'.$_GET['add']])){
$_SESSION['cart_'.$_GET['add']]='1';
}else{
$_SESSION['cart_'.$_GET['add']]+='1';
}
}

[Jessica]

Make $_SESSION['cart'] an array.