PHP getting value from a multi dimensional array

Question

I have a multi dimensional array that I am able to loop through with a FOR loop and return the values to enter into the database. The problem comes in when the user deletes an item which I then take out of the $_SESSION[cart] array using unset. Specifically if it was line 2 in the cart I would use

unset($_SESSION[cart][2]);

Now I can no longer use the FOR loop because the values I use in the FOR loop have gaps in them.

The original array would be:

$_SESSION['cart'][1] $_SESSION['cart'][2] $_SESSION['cart'][3]

AFTER deleting line 2 from the cart(it can be any line this is an example):

$_SESSION['cart'][1] $_SESSION['cart'][3]

This is how the array is structured:

$_SESSION['cart'][$lineId] = array('stockNumber' => $stockNumber, 'description' => $description, 'masterPrice' => $masterPrice);

$lineId is the line item in the cart

I currently retrieve the data from the cart using this loop:

for ($i = 1, $howMany = count($_SESSION['cart']); $i < $howMany+1; ) {
$stk_code = $_SESSION['cart'][$i]["stockNumber"];
$description = $_SESSION['cart'][$i]["description"]; 
$unitPrice = $_SESSION['cart'][$i]["masterPrice"];}

I need help in understanding this and a way to loop through the array regardless of line item number. I have no way of knowing how many items will be in the cart or how many they take out. Any help would be appreciated.

Answer 1

You can use foreach instead of for loop

$_SESSION['cart'][1] = array('stockNumber' => 1, 'description' => 'test', 'masterPrice' => 115);

    foreach ($_SESSION['cart'] as $value) {
      $stk_code = $value["stockNumber"];
      $description = $value["description"]; 
      $unitPrice = $value["masterPrice"];
    }