Session array unset and delete row

Question

I get the id of a product and try to delete from my session array.I use unset and everything goes well but when i try to display the data in a loop the session still have the deleted row so i get the error Undefined offset: 0. I use a second session that just has the count of the first so when i delete one row it works fine.However when i try the same to the multidimensional session ($_SESSION['cart'] = $_SESSION['cart'] -1;) it doesnt work and i get the error Unsupported operand types..

So to sum up i need to delete a specific data from the session array and when i use unset it does delete it but the array still has all the indexes if i have 3 products i delete the second one and when i display them the array still have index 0,1,2..

Here is my code

$cart = $_SESSION['cart'];
$c=$_SESSION['c'];

$id=$_GET['id'];


unset($_SESSION['c'][$id]);
unset($_SESSION['cart'][$id]);


$_SESSION['c'] = $_SESSION['c'] -1;
$_SESSION['cart'] = $_SESSION['cart'] -1;

By the looks of things you're trying to subtract from an array a int. It doesn't make sense. As $_SESSION['c'] is in fact, an array and not an int(or float, or whatever). — Andrei
– Andrei, Commented Jun 9, 2015 at 11:05
i know i try actually to decrease the index of the array but dont know how. — akerman
– akerman, Commented Jun 9, 2015 at 11:08
Ah, well that's a whole different matter. Just do $_SESSION['c'] = $_SESSION[VALUE YOU WANT GOES HERE]. So basically rewrite the index c of the $_SESSION. — Andrei
– Andrei, Commented Jun 9, 2015 at 11:09
well $_SESSION['c'] = $_SESSION['c'] -1; this line works i m having issue with this line $_SESSION['cart'] = $_SESSION['cart'] -1; the session array had 3 products and when i delete one of them the array still have 3 products but the one i unseted is empty so the array has 1 empty cell that i dont wont to be empty i just want to delete it so the 2 products will go 'up' and have the indexes 0 and 1.. does that make sense? sorry .. — akerman
– akerman, Commented Jun 9, 2015 at 11:15
So you want to change the array keys and sort them basically? — Andrei
– Andrei, Commented Jun 9, 2015 at 11:30

joy d · Accepted Answer · 2015-06-09 12:13:27Z

1

Replace

$_SESSION['c'] = $_SESSION['c'] -1;

by

$_SESSION['c'] = array_values($_SESSION['c']);

"-1" will throw error since you are trying to subtract numeric value from a N-dimensional array. array_values will return you updated $_SESSION['c'] after unset/delete operation is done.

P.S. Update your code accordingly for $_SESSION['cart'] as well.

answered Jun 9, 2015 at 12:13

joy d

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1 Comment

enLighter Programmer Over a year ago

$_SESSION['c'] = array_values($_SESSION['c']); solved the problem of mine, thank you so much

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