本文实例讲述了PHP聚合式迭代器接口IteratorAggregate用法。分享给大家供大家参考,具体如下:
PHP IteratorAggregate又叫聚合式迭代器,它提供了创建外部迭代器的接口,接口摘要如下:
IteratorAggregate extends Traversable { abstract public Traversable getIterator ( void ) }
实现getIterator方法时必须返回一个实现了Iterator接口的类的实例。
例子说明:
last = "last property"; } public function getIterator() { return new ArrayIterator($this); } } $obj = new myData; foreach($obj as $key => $value) { var_dump($key, $value); echo '
';// Linux:echo "n"; } ?>
以上例子输出:
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)