IteratorAggregate extends Traversable {  abstract public Traversable getIterator ( void )}

<?php/** * 利用聚合式迭代器，并返回一個(gè)實(shí)現(xiàn)了Iterator接口的類的實(shí)例 * * @author 瘋狂老司機(jī) */class myData implements IteratorAggregate {  public $one = "Public property one";  public $two = "Public property two";  public $three = "Public property three";  public function __construct() {    $this->last = "last property";  }  public function getIterator() {    return new ArrayIterator($this);  }}$obj = new myData;foreach($obj as $key => $value) {  var_dump($key, $value);  echo '<br>';// Linux：echo "/n";}?>

string 'one' (length=3)string 'Public property one' (length=19)string 'two' (length=3)string 'Public property two' (length=19)string 'three' (length=5)string 'Public property three' (length=21)string 'last' (length=4)string 'last property' (length=13)