Undefined Offset Array

Question

when I run this code I get Notice: Undefined offset: 3 On line 12 and 18. 12 and 18 with in front.

$_SESSION['basket'][3];

if(isset($_GET['action']) && $_GET['action'] == "add")
{
    if(isset($_GET['product_id']))
    {
        **$_SESSION['basket'][3] += 4;**
    }
    else
    {
        $_SESSION['basket'][3] += 1;

    }
}

The line `$_SESSION['basket'][3];` does not in fact do *anything* at all. — deceze, Aug 25 '14 at 09:14
Its only when I run the page first time, when I run it after the first time the error is gone. — kristian, Aug 25 '14 at 09:15

score 1 · Answer 1 · answered Aug 25 '14 at 09:13

1

Try to initialize value at 3rd index.

$_SESSION['basket'][3] = 0;

Or the better solution is

$_SESSION['basket'][3] = isset($_SESSION['basket'][3]) ? $_SESSION['basket'][3] : 0;

Instead of only

$_SESSION['basket'][3];

answered Aug 25 '14 at 09:13

Manwal

23,450
12
63
93

score -1 · Answer 2 · answered Aug 25 '14 at 09:17

-1

Thing is that you are not initialising the session

Try initialise it like this

$_SESSION['baslet'][3] = 0;

now for

$_SESSION['basket'][3] += 4;

try it like this

$_SESSION['basket'][3] = intval($_SESSION['basket'][3]) + 4;

better always convert data into integer type or float type before mathematical opearations

answered Aug 25 '14 at 09:17

Smruti Singh

565
1
4
14

Stop downvoting my answers @manwal – Smruti Singh Aug 25 '14 at 10:42

Undefined Offset Array

2 Answers2