Converts the stack to an array.
Note:
Casting to an array is not supported yet.
This function has no parameters.
An array containing all the values in the same order as the stack.
Example #1 Ds\Stack::toArray() example
<?php
$stack = new \Ds\Stack([1, 2, 3]);
var_dump($stack->toArray());
?>
The above example will output something similar to:
array(3) {
  [0]=>
  int(3)
  [1]=>
  int(2)
  [2]=>
  int(1)
}