# The DOMNodeList class

(PHP 5, PHP 7, PHP 8)

## 简介

Represents a live list of nodes.

## 类摘要

class DOMNodeList implements IteratorAggregate, Countable {
/* 属性 */
public readonly int $length;
/* 方法 */
public count(): int
public getIterator(): Iterator
public item(int `$index`): DOMElement|DOMNode|DOMNameSpaceNode|null
}

## 属性

length

  The number of nodes in the list. The range of valid child node indices is 0 to `length - 1` inclusive.

## 更新日志

版本 | 说明
--- | ---
8.0.0 | DOMNodeList implements IteratorAggregate now. Previously, Traversable was implemented instead.
7.2.0 | The Countable interface is implemented and returns the value of the length property.

## 注释

> 注意: Nodes in the list can be accessed by array syntax.

## 参见

- » W3C specification of NodeList

## 目录

- DOMNodeList::count — Get number of nodes in the list
- DOMNodeList::getIterator — Retrieve an external iterator
- DOMNodeList::item — Retrieves a node specified by index

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