PHP聚合式迭代器接口IteratorAggregate用法分析

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

<?php
/
  利用聚合式迭代器，并返回一个实现了Iterator接口的类的实例
 
  @author 疯狂老司机
 /
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>';// Linuxecho "\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)