PHP: DOMDocument->loadXML()

DOMDocument->loadXML()

(no version information, might be only in CVS)

DOMDocument->loadXML() -- Load XML from a string

Описание

class DOMDocument {

bool loadXML ( string source [, int options] )

}

Loads an XML document from a string.

This method may also be called statically to load and create a DOMDocument object. The static invocation may be used when no DOMDocument properties need to be set prior to loading.

Список параметров

source: The string containing the XML.

Возвращаемые значения

Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.

Примеры

Пример 1. Creating a Document

<?php $doc = DOMDocument::loadXML('<root><node/></root>'); echo $doc->saveXML(); $doc = new DOMDocument(); $doc->loadXML('<root><node/></root>'); echo $doc->saveXML(); ?>

DOMDocument->loadXML()

earth at anonymous dot com
12-Apr-2006 02:28


Note that loadXML crops off beginning and trailing whitespace and linebreaks.



When using loadXML and appendChild to add a chunk of XML to an existing document, you may want to force a linebreak between the end of the XML chunk and the next line (usually a close tag) in the output file:



$childDocument = new DOMDocument;

$childDocument>preserveWhiteSpace = true;

$childDocument->loadXML(..XML-Chunk..);

$mNewNode = $mainDOcument->importNode($childDocument->documentElement, true);

$ParentNode->appendChild($mNewNode);

$ParentNode->appendChild($mainDocument->createTextNode("\\n  ");



Although it is said that DOM should not be used to make 'pretty' XML output, it is something I struggled with to get something that was readable for testing.  Another solution is to use the createDocumentFragment()->appendXML(..XML-Chunk..) instead, which seems not to trim off linebreaks like DOMDocument->loadXML() does.

georg at howen dot de
06-Mar-2006 04:04


Just in case you try to do the same as I did and thought you found a bug:



loadXML() is not a true static function. It is just allowed to be called statically. When called statically within a method of an instantiated DOMDocument object it acts as if the method had been called directly from the object itself rather than statically.



This means that if you call DOMDocument::loadXML() from within an instantiated DOMDocument object, it will not return a new DOMDocument but true/false.



Georg

primaryspace at hotmail dot com
09-Aug-2005 01:42


This method replaces any existing document tree already in the object with the document tree contained in the source argument.

blaine at blainegarrett dot com
25-May-2005 09:04


It seems this method does not throw a DOMException if it fails, but rather a regular warning. Thus it makes it hard to fine tune strings to try to get them to be valid XML.



Ideally, there would be a way to figure out why loadXML failed (by way of the exception), but rather only an warning is displayed.  This is a heads up for anyone trying to write their own string_to_xml() functions. 



$string = '$$$"$$"&&&&�lesund';



try {

    $dom = DOMDocument::loadXML($test_string);

}

catch(DOMException $e) { 

 echo '<pre>';

 print_r($e);

 echo '</pre>';

}



Blaine 

http://blainegarrett.com

DOMDocument->loadXML()

Описание

Список параметров

Возвращаемые значения

Примеры

Смотрите также