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. 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.

范例

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