unset() from two dimensional array

[DizzyDevil]

Is this possible the way I'm doing it? If so, does anyone know the proper syntax?

if (isset($_GET['remove'])) {  
     $remove = $_GET['remove'];   //value to be removed
    }
  
if (in_array($remove, $_SESSION ['cart'])) {  //check to see if value is in array
    
unset($_SESSION['cart'][$remove]); // Remove item from $_SESSION['cart'] array
  
} 

[HardCoded]

Looks fine to me. Why? Is there a problem?

[DizzyDevil]

unset isn't working. $_SESSION['cart'] still holds the same value after.

[HardCoded]

Are you sure $_GET['remove'] holds a cart key and not a value? Can you show more code?

[HardCoded]

Oh, I see it. I think you need array_key_exists() instead of in_array().

[DizzyDevil]

Well I guess that's part of my problem. $remove is a value, not a key. So I guess my next question is obvious. How do I obtain the key?

[DizzyDevil]

array_search maybe? Would a search for the value return the key?

[HardCoded]

Simple way would be to pass the key. If not, you can do:

if (isset($_GET['remove'])) {  
     $remove = $_GET['remove'];   //value to be removed
    }
  
foreach($_SESSION ['cart'] as $k=>$v) {  //check to see if value is in array
    if(isset($remove) && $v == $remove) {
        unset($_SESSION['cart'][$k]); // Remove item from $_SESSION['cart'] array
    }
} 

[DizzyDevil]

Thanks HardCoded, that worked nicely. I think I'll work on your suggestion of passing the key though