DOMNodeList::item
(PHP 5, PHP 7)
DOMNodeList::item — Retrieves a node specified by index
说明
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:
<?php
foreach ($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