Start</br>array(4) {
  ["e1"]=>
  string(4) "ieio"
  ["e2"]=>
  string(3) "one"
  ["z"]=>
  string(3) "two"
  ["x"]=>
  string(4) "zero"
}
</br>array(4) {
  [0]=>
  string(2) "e1"
  [1]=>
  string(2) "e2"
  [2]=>
  string(1) "z"
  [3]=>
  string(1) "x"
}
</br> ****</br>Array
(
    [0] => e1
    [1] => e2
)
</br>Stop