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# DOMDocument->save()

(no version information, might be only in CVS)

DOMDocument->save() -- Dumps the internal XML tree back into a file

## 说明

class DOMDocument {
mixed save ( string filename [, integer 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.

## 参数

filename

  The path to the saved XML document.

options

  Additional Options. Currently only LIBXML_NOEMPTYTAG is supported.

## 返回值

Returns the number of bytes written or `FALSE` if an error occurred.

## 更新日志

版本 | 说明
--- | ---
5.1.0 | Added the options parameter

## 范例

例子 1. Saving a DOM tree into a file

`<?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 'Wrote: ' . $doc->save("/tmp/test.xml") . ' bytes'; // Wrote: 72 bytes
?>`

## 参见

DOMDocument->saveXML()
DOMDocument->load()
DOMDocument->loadXML()

后退 | 起点 | 前进
DOMDocument->relaxNGValidateSource() | 上一级 | DOMDocument->saveHTML()