DOMDocument::save
(PHP 5)
DOMDocument::save — Dumps the internal XML tree back into a file
Description
public int DOMDocument::save
( string
$filename
[, 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
-
filename -
The path to the saved XML document.
-
options -
Additional Options. Currently only LIBXML_NOEMPTYTAG is supported.
Return Values
Returns the number of bytes written or FALSE if an error occurred.
Changelog
| Version | Description |
|---|---|
| 5.1.0 |
Added the options parameter
|
Examples
Example #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
?>
See Also
- DOMDocument::saveXML() - Dumps the internal XML tree back into a string
- DOMDocument::load() - Load XML from a file
- DOMDocument::loadXML() - Load XML from a string
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Обработка XML
- Document Object Model
- Функция DOMDocument::__construct() - Создание нового DOMDocument объекта
- Функция DOMDocument::createAttribute() - Создает новый атрибут
- Функция DOMDocument::createAttributeNS() - Создает новый узел-атрибут с соответствующим ему пространством имен
- Функция DOMDocument::createCDATASection() - Создает новый cdata узел
- Функция DOMDocument::createComment() - Создает новый узел-комментарий
- Функция DOMDocument::createDocumentFragment() - Создание фрагмента докуента
- Функция DOMDocument::createElement() - Создает новый узел-элемент
- Функция DOMDocument::createElementNS() - Создание нового узла-элемента с соответствующим пространством имен
- Функция DOMDocument::createEntityReference() - Создание нового узла-ссылки на сущность
- Функция DOMDocument::createProcessingInstruction() - Создает новый PI-узел
- Функция DOMDocument::createTextNode() - Создает новый текстовый узел
- Функция DOMDocument::getElementById() - Ищет элемент с заданным id
- Функция DOMDocument::getElementsByTagName() - Ищет все элементы с заданным локальным именем
- Функция DOMDocument::getElementsByTagNameNS() - Ищет элементы с заданным именем в определенном пространстве имен
- Функция DOMDocument::importNode() - Импорт узла в текущий документ
- Функция DOMDocument::load() - Загрузка XML из файла
- Функция DOMDocument::loadHTML() - Загрузка HTML из строки
- Функция DOMDocument::loadHTMLFile() - Загрузка HTML из файла
- Функция DOMDocument::loadXML() - Загрузка XML из строки
- Функция DOMDocument::normalizeDocument() - Нормализует документ
- Функция DOMDocument::registerNodeClass() - Регистрация расширенного класса, используемого для создания базового типа узлов
- Функция DOMDocument::relaxNGValidate() - Производит проверку документа на правильность построения посредством relaxNG
- Функция DOMDocument::relaxNGValidateSource() - Проверяет документ посредством relaxNG
- Функция DOMDocument::save() - Сохраняет XML дерево из внутреннего представления в файл
- DOMDocument::saveHTML
- DOMDocument::saveHTMLFile
- Функция DOMDocument::saveXML() - Сохраняет XML дерево из внутреннего представления в виде строки
- Функция DOMDocument::schemaValidate() - Проверяет действительности документа, основываясь на заданной схеме
- Функция DOMDocument::schemaValidateSource() - Проверяет действительность документа, основываясь на схеме
- Функция DOMDocument::validate() - Проверяет документ на соответствие его DTD
- Функция DOMDocument::xinclude() - Проводит вставку XInclude разделов в объектах DOMDocument
Коментарии
The XML parser converts the text of an XML document into UTF-8, even if you have set the character encoding of the XML, for example as a second parameter of the DOMDocument constructor. After parsing the XML with the load() command all its texts have been converted to UTF-8.
In case you append text nodes with special characters (e. g. Umlaut) to your XML document you should therefore use utf8_encode() with your text to convert it into UTF-8 before you append the text to the document. Otherwise you will get an error message like "output conversion failed due to conv error" at the save() command. See example below:
<?php
// Text to insert into XML below
$txt = "a text with special characters like 'ä', 'ß', 'Ü' etc.";
// Create Instance of DOMDocument
$dom = new DOMDocument;
// Load XML file
// Was created before with DOMDocument('1.0', 'iso-8859-1')
$dom = $dom->load("file.xml");
// Find the parent node
$parent = $dom->documentElement;
// Create Instance of DomXPath
$xpath = new DomXPath($dom);
// new node will be inserted before this node
$next = $xpath->query("//parentnode/childnode");
// Create the new element
$new_elem = $dom->createElement('new_elem');
// Insert the new element
$parent->insertBefore($new_elem, $next->item(0));
// DOMXML = utf-8! (will be converted to iso-8859-1 only at 'save()')
// prevents error message "output conversion failed due to conv error" at 'save()'
$txt = utf8_encode($txt);
// Create new text node with utf-8 encoded string
$nodetext = $dom->createTextNode("$txt");
// Append text node to new element
$nodetext = $new_elem->appendChild($nodetext);
// save
$dom->save("file.xml");
?>
Hope this helps someone.
siegparr
It took me forever to discover that
DOMDocument->formatOutput = true
will only have an effect on documents that are loaded from disk if one also sets
DOMDocument->preserveWhiteSpace = false ....
Hope this saves somebody a headache.
I had been hitting my head against the wall when I couldn't get an edited XML file to save due to file permissions, even though I knew that it was OK.
Eventually I realised that for some odd reason, when I went to save the XML file, it would try to write the file to the root directory.
As such, use realpath() to keep the complete system path to the XML file when you load it:
<?php
$myfile = 'myxml.xml';
$myfile = realpath($myfile);
$doc = new DOMDocument('1.0');
$doc->load($myfile);
// Let's just add a couple of elements for good measure
$root = $doc->documentElement;
$title = $doc->createElement('title');
$title = $root->appendChild($title);
$text = $doc->createTextNode('This is a title');
$text = $title->appendChild($text);
$doc->save($myfile);
?>
When creating a DOMDocument from scratch and saving it, the encoding will be utf-8, although it's declared as iso-8859-1.
When loading an XML-file declared and saved as iso-8859-1, php will keep the correct encoding when it's saved after changes are made.
Php converts files declared as iso-8859-1 to utf-8 internally. To add text containing special characters, the text must be encoded as utf-8. When the document is saved, special characters are converted to iso-8859-1.
To save an xml created from scratch, use fopen/fwrite and utf8_decode:
$doc = new DOMDocument('1.0', 'iso-8859-1');
//Add som nodes and text with apropriate methods
$f = fopen('xmlfile.xml', 'w+');
fwrite($f, utf8_decode($doc->saveXML()));
fclose($f);
I just intend to bring my little contribution to the use of DOMDocument::save() function along with PHP serialize() function.
Sometimes you could have to serialize a PHP object before you put it into a XML structure (or other..). And then I suppose you could have to save this XML structure in a file. Of course, you will further need to read this file and unserialize it before to use its content.
The problem appears when there are some properties described as Protected in the object to be serialized.
As it’s written in the PHP documentation, serialize function add for those protected properties an asterisk before the name of the property along with a NULL character on each side of the asterisk.
In this case, the DOMDocument::save function will stop the save operation just before the first NULL character met in the string to be saved, because PHP consider it as a potential risk.
So, after that, the unserialize operation of the file become impossible.
To solve that, here is a first solution to apply :
For the serialize , before the DOMDocument::save() ::
$data_serial = explode("\x00\x2A\x00", serialize($object)); //take off the 'NULL * NULL' string
$data_serial = implode("\x5C\x30\x2A\x5C\x30", $data_serial); //and replace with '\0*\0' string
Before the unserialize :
$data_serial = explode("\x5C\x30\x2A\x5C\x30", $serialized_object); // take off the '\0*\0' string
$serial_object = implode("\x00\x2A\x00", $data_serial); // and replace with 'NULL * NULL' string as included by the previous serialize
And a second solution :
For the serialize, before the DOMDocument::save() :
$serialized_object = addslashes(serialize($object)) ;
Before re-using the object in your application :
$object = unserialize(stripslashes($serialized_object)) ;
Hope this will help some.