DOMNodeList::item
(PHP 5, PHP 7, PHP 8)
DOMNodeList::item — Retrieves a node specified by index
说明
Retrieves a node specified by index within the
DOMNodeList object.
小技巧
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.
示例
示例 #1 Traversing all the entries of the table
<?php
$doc = new DOMDocument;
$doc->load('examples/book-docbook.xml');
$items = $doc->getElementsByTagName('entry');
for ($i = 0; $i < $items->length; $i++) {
echo $items->item($i)->nodeValue . "\n";
}
?>示例 #2 Accessing item with array syntax
<?php
$doc = new DOMDocument;
$doc->load('examples/book-docbook.xml');
$items = $doc->getElementsByTagName('entry');
for ($i = 0; $i < $items->length; $i++) {
echo $items[$i]->nodeValue . "\n";
}
?>示例 #3 Traversing items with foreach
<?php
$doc = new DOMDocument;
$doc->load('examples/book-docbook.xml');
$items = $doc->getElementsByTagName('entry');
foreach ($items as $item) {
echo $item->nodeValue . "\n";
}
?>以上示例会输出：
Title Author Language ISBN The Grapes of Wrath John Steinbeck en 0140186409 The Pearl John Steinbeck en 014017737X Samarcande Amine Maalouf fr 2253051209