DOMDocument::saveXML

(PHP 5, PHP 7)

Dumps the internal XML tree back into a string

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

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.

Parameters:

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.

Returns:

Returns the XML, or FALSE if an error occurred.

Exception:

Raised if node is from another document.

Changelog:

5.1.0

Added the options parameter

Examples:

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);

?>

The above example will output:

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>