Pointers?

$a = new tArray(["The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"]);
$b = new tArraySegment($a, 2, 5); //"brown", "fox", "jumps", "over", "the"

$a[3] = 'LION';

// expected
var_dump($a); // "The", "quick", "brown", "LION", "jumps", "over", "the", "lazy", "dog"
var_dump($b); //"brown", "LION", "jumps", "over", "the"


object(ILLI\System\Collection\TArraySegment)#3 (5) {
  ["__reference":"ILLI\System\Collection\TArraySegment":private]=>
  &object(ILLI\System\Collection\TArray)#2 (4) {
    ["__itMode":"ILLI\System\Collection\TArray":private]=>
    int(0)
    ["__index":"ILLI\System\Collection\TArray":private]=>
    int(0)
    ["__array":"ILLI\System\ProtoArray":private]=>
    array(9) {
      [0]=>
      string(3) "The"
      [1]=>
      string(5) "quick"
      [2]=>
      string(5) "brown"
      [3]=>
      string(4) "LION"
      [4]=>
      string(5) "jumps"
      [5]=>
      string(4) "over"
      [6]=>
      string(3) "the"
      [7]=>
      string(4) "lazy"
      [8]=>
      string(3) "dog"
    }
    ["__protMode":"ILLI\System\ProtoArray":private]=>
    int(0)
  }
  ["__itMode":"ILLI\System\Collection\TArray":private]=>
  int(0)
  ["__index":"ILLI\System\Collection\TArray":private]=>
  int(0)
  ["__array":"ILLI\System\ProtoArray":private]=>
  array(5) {
    [2]=>
    string(5) "brown"
    [3]=>
    string(3) "fox"
    [4]=>
    string(5) "jumps"
    [5]=>
    string(4) "over"
    [6]=>
    string(3) "the"
  }
  ["__protMode":"ILLI\System\ProtoArray":private]=>
  int(0)
}