PHP Built-in Method to Get Array Values Given a List of Keys

Question

I have an \'dictionary\' array such as this:

  $arr[\'a\']=5;
  $arr[\'b\']=9;
  $arr[\'as\']=56;
  $arr[\'gbsdfg\']=89;

And I need a metho

Answer 1

array_intersect_key

Answer 2

If you have an array of keys as values you can use array_intersect_key combined with array_flip. For example:

$values = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4];
$keys   = ['a', 'c'];

array_intersect_key($values, array_flip($keys));
// ['a' => 1, 'c' => 3]