array(5) {
  [0]=>
  int(1)
  [1]=>
  int(8)
  [2]=>
  int(27)
  [3]=>
  int(64)
  [4]=>
  int(125)
}
array(5) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
  [3]=>
  int(4)
  [4]=>
  int(5)
}
array(2) {
  ["x"]=>
  int(6)
  [0]=>
  int(7)
}
array(2) {
  [0]=>
  array(2) {
    [0]=>
    int(6)
    [1]=>
    array(2) {
      [0]=>
      string(1) "a"
      [1]=>
      string(1) "b"
    }
  }
  [1]=>
  array(2) {
    [0]=>
    int(7)
    [1]=>
    bool(true)
  }
}