Remove elements from array PHP

Question

i have an array that the middle part change according to quantity products

Array ( [name] => Alberto [email] => [email protected] [code_1] => tshirt [description_1] => Tshirt color red [price_1] => 453.0 [quantity_1] => 1 [subtotal_1] => 453.0 [code_2] => sweater [description_2] => Sweater with long sleeves [price_2] => 23.43 [quantity_2] => 2 [subtotal_2] => 46.86 [employee] => 1 [total] => 499.86 )

And i want to remove the first 2 elements and the last 2 elements, just leave

Array ( [code_1] => tshirt [description_1] => Tshirt color red [price_1] => 453.0 [quantity_1] => 1 [subtotal_1] => 453.0 [code_2] => sweater [description_2] => Sweater with long sleeves [price_2] => 23.43 [quantity_2] => 2 [subtotal_2] => 46.86 )

I try with

array_splice($_POST, 2, -2);

but this just keep the first 2 and last 2, I need the elements between them.

Thanks for your help :)

Answer 1

Slice using array_slice() from the 3rd item (offset 2) to the end minus the last 2:

$result = array_slice($_POST, 2, -2);

Note: If your array is 4 items or less obviously, you won't get anything.

To do it with array_splice(), remove the first 2 and then the last 2:

array_splice($_POST, 0, 2);
array_splice($_POST, -2);

Since this is an associative array it may be better to get only the keys that you want regardless of order:

$wanted = array('price_1', 'quantity_1'); // etc...
$result = array_intersect_key($_POST, array_flip($wanted));

Answer 2

Since your data structure is a HASH MAP you SHOULD NOT remove the elements with numeric indexes (key position).

It is a HASH MAP and you MUST NOT relay on indexes (key position), RELAY only on keys.

Remove any element from an array (hash map) using unset instruction.

unset($arr['name'], $arr('email'));