(PHP 5, PHP 7)
DOMDocument::getElementsByTagName — Searches for all elements with given local tag name
This function returns a new instance of class DOMNodeList containing all the elements with a given local tag name.
nameThe local name (without namespace) of the tag to match on. The special value * matches all tags.
A new DOMNodeList object containing all the matched elements.
Example #1 Basic Usage Example
<?php
$xml = <<< XML
<?xml version="1.0" encoding="utf-8"?>
<books>
<book>Patterns of Enterprise Application Architecture</book>
<book>Design Patterns: Elements of Reusable Software Design</book>
<book>Clean Code</book>
</books>
XML;
$dom = new DOMDocument;
$dom->loadXML($xml);
$books = $dom->getElementsByTagName('book');
foreach ($books as $book) {
echo $book->nodeValue, PHP_EOL;
}
?>
以上例程会输出：
Patterns of Enterprise Application Architecture Design Patterns: Elements of Reusable Software Design Clean Code