Array unsetting keys

Question

Straight to the point...

I have an array ($is_anonymous_ary) that looks like this:

array (
  [80] => 1
  [57] => 1
  [66] =>
  [60] => 
  [90] => 1
)

And another array ($user_id_ary) like this one:

array (
  [0] => 80
  [1] => 30
  [2] => 57
  [3] => 89
  [4] => 66
  [5] => 60
  [6] => 90
)

I need to unset values on the $user_id_ary based on the first array. So, if the value from $is_anonymous_ary is 1 (true), then take the key from that array, check against $user_id_ary, and unset the keys from $user_id_ary which had the value from the keys from $is_anonymous_ary.

I complicated the description a bit, here is how I need my final result:

user_id_ary = array(
  [0] => 30
  [1] => 89
  [2] => 66
  [3] => 60
)

As you see all keys from the $is_anonymous_ary that had a TRUE value, are gone in the second array. which had the keys from the first array as values in the second array.

Hope I made myself clear.

Answer 1

Try array_filter:

$user_id_ary = array_filter($user_id_ary, function($var) use ($is_anonymous_ary) {
  return !(isset($is_anonymous_ary[$var]) && $is_anonymous_ary[$var] === 1);
});