PHP Manual
DOMDocument
Dumps the internal XML tree back into a string

DOMDocument::saveXML

(PHP 5, PHP 7)

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

说明

public DOMDocument::saveXML ([ DOMNode $node [, int $options = 0 ]] ) : string

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. Currently only LIBXML_NOEMPTYTAG 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
5.1.0	Added the `options` parameter

范例

Example #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);

?>

以上例程会输出：

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

DOMDocument::save() - Dumps the internal XML tree back into a file
DOMDocument::load() - Load XML from a file
DOMDocument::loadXML() - Load XML from a string