TestIterator.php

<?php

class TestIterator implements Iterator {
  protected $array;
  protected $position;
  public function __construct($array = array()) {
    $this->array = $array;
  }
  public function rewind() {
    $this->position = 0;
  }
  public function valid() {
    return $this->position < count($this->array);
  }
  public function key() {
    return $this->position;
  }
  public function current() {
    return $this->array[$this->position];
  }
  public function next() {
    $this->position++;
  }

}