PHP基礎之預定義接口3——IteratorAggregate接口

創建外部迭代器的接口。

IteratorAggregate extends Traversable { /* 方法 */ abstract public Traversable getIterator ( void )}

Example #1 基本用法

<?php class myData implements IteratorAggregate {public $property1 = 'Public property one';public $property2 = 'Public property two';public $property3 = 'Public property three';public function __construct() { $this->property4 = 'last property';}public function getIterator() { return new ArrayIterator($this);} } $obj = new myData; foreach($obj as $key => $value) {var_dump($key, $value);echo 'n'; }?>

以上例程的輸出類似于：

string(9) 'property1'string(19) 'Public property one'string(9) 'property2'string(19) 'Public property two'string(9) 'property3'string(21) 'Public property three'string(9) 'property4'string(13) 'last property'?方法列表IteratorAggregate::getIterator?— 獲取一個外部迭代器