Question

This is my code:

foreach ($all_orders as $order){//the $all_orders array contains a number of arrays, so it's a multidimensional array

$order["Order Rank"]=$order[0];
unset($order[0]);
}

after renaming the key with the new key and when i print the array:

print_r($all_orders);

i got the old key name (which is 0):

Array
(
    [0] => Array
        (
            [0] => 1
            )

why it’s not :

Array
    (
        [0] => Array
            (
                ["Order Rank"] => 1
                )

am i missing something? thanx in advance.

Answer 1

You’re modifying a copy of the element.

Use references:

foreach ($all_orders as &$order) {
    //...
}