Php/docs/domnodelist.item

• PHP Manual
• DOMNodeList
• Retrieves a node specified by index

DOMNodeList::item

(PHP 5, PHP 7)

DOMNodeList::item — Retrieves a node specified by index

说明

DOMNodeList::item ( int $index ) : DOMNode

Retrieves a node specified by index within the DOMNodeList object.

Tip If you need to know the number of nodes in the collection, use the length property of the DOMNodeList object.

参数

index

Index of the node into the collection.

返回值

The node at the indexth position in the DOMNodeList, or null if that is not a valid index.

范例

Example #1 Traversing all the entries of the table

<?php$doc = new DOMDocument;$doc->load('book.xml');$items = $doc->getElementsByTagName('entry');for ($i = 0; $i < $items->length; $i++) {    echo $items->item($i)->nodeValue . "\n";}?>

Alternatively, you can use foreach, which is a much more convenient way:

<?phpforeach ($items as $item) {    echo $item->nodeValue . "\n";}?>

以上例程会输出：

Title
Author
Language
ISBN
The Grapes of Wrath
John Steinbeck
en
0140186409
The Pearl
John Steinbeck
en
014017737X
Samarcande
Amine Maalouf
fr
2253051209