DOMDocument::saveXML

(PHP 5, PHP 7, PHP 8)

DOMDocument::saveXML — Dumps the internal XML tree back into a string

说明

public DOMDocument::saveXML(?DOMNode $node = null, int $options = 0): string|false

Creates an XML document from the DOM representation. This function is usually called after building a new dom document from scratch as in the example below.

参数

node

Use this parameter to output only a specific node without XML declaration rather than the entire document.

options

Additional Options. The LIBXML_NOEMPTYTAG and LIBXML_NOXMLDECL options are supported. Prior to PHP 8.3.0, only the LIBXML_NOEMPTYTAG option is supported.

返回值

Returns the XML, or false if an error occurred.

错误／异常

DOM_WRONG_DOCUMENT_ERR

Raised if node is from another document.

更新日志

版本 说明
8.3.0 LIBXML_NOXMLDECL is now supported.

示例

示例 #1 Saving a DOM tree into a string

<?php

$doc = new DOMDocument('1.0');
// we want a nice output
$doc->formatOutput = true;

$root = $doc->createElement('book');
$root = $doc->appendChild($root);

$title = $doc->createElement('title');
$title = $root->appendChild($title);

$text = $doc->createTextNode('This is the title');
$text = $title->appendChild($text);

echo "Saving all the document:\n";
echo $doc->saveXML() . "\n";

echo "Saving only the title part:\n";
echo $doc->saveXML($title);

?>

以上示例会输出：

Saving all the document:
<?xml version="1.0"?>
<book>
  <title>This is the title</title>
</book>

Saving only the title part:
<title>This is the title</title>

参见