Last updated: Fri, 13 Nov 2009

DOMDocument::load

(PHP 5)

DOMDocument::load — Load XML from a file

Descrição

mixed DOMDocument::load ( string $filename [, int $options = 0 ] )

Loads an XML document from a file.

Aviso

Unix style paths with forward slashes can cause significant performance degradation on Windows systems; be sure to call realpath() in such a case.

Parâmetros

filename: The path to the XML document.
options: Bitwise OR of the libxml option constants.

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em falhas. If called statically, returns a DOMDocument and issues E_STRICT warning.

Erros

If an empty string is passed as the filename or an empty file is named, a warning will be generated. This warning is not generated by libxml and cannot be handled using libxml's error handling functions.

Exemplos

Exemplo #1 Creating a Document


<?php
$doc = new DOMDocument();
$doc->load('book.xml');
echo $doc->saveXML();
?>

Veja Também

DOMDocument::loadXML - Load XML from a string
DOMDocument::save - Dumps the internal XML tree back into a file
DOMDocument::saveXML - Dumps the internal XML tree back into a string

DOMDocument::loadHTML

DOMDocument::importNode

Last updated: Fri, 13 Nov 2009

add a note User Contributed Notes
DOMDocument::load

zachatwork at gmail dot com
01-Jul-2009 04:28


You can easily avoid the warning about &nbsp; references by using the LIBXML_DTDLOAD option. 



<?php



$html = <<<EOF

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

  <head>

  </head>

  <body>

    <p>&nbsp;</p>

  </body>

</html>

EOF;



// This one works perfectly.

$dom = new DOMDocument();

$dom->loadXML($html, LIBXML_DTDLOAD);

print $dom->saveXML();



// This one produces a warning.

$dom = new DOMDocument();

$dom->loadXML($html);

print $dom->saveXML();



?>



See also: http://www.php.net/manual/en/libxml.constants.php



Note that libxml will detect that your DTD is locally available via /etc/xml/catalog. So there is no worry about this causing your DOM loads to make external network requests.

Jonas Due Vesterheden
09-Jun-2009 01:18


I had a problem with loading documents over HTTP. I would get errors looking like this:



Warning: DOMDocument::load(http://external/document.xml): failed to open stream: HTTP request failed! HTTP/1.1 500 Internal Server Error



The document would load fine in browsers and using wget. The problem is that DOMDocument::load() on my systems (both OS X and Linux) didn't send any User-Agent header which for some weird reason made Microsoft-IIS/6.0 respond with the 500 error.



The solution is found on http://php.net/manual/en/function.libxml-set-streams-context.php : 



<?php

$opts = array(

    'http' => array(

        'user_agent' => 'PHP libxml agent',

    )

);



$context = stream_context_create($opts);

libxml_set_streams_context($context);



// request a file through HTTP

$doc = DOMDocument::load('http://www.example.com/file.xml');

?>

syntaxiko
05-Apr-2009 04:16


Function will not work if using XML DOM PECL module

darren at viamedia dot co dot za
05-Aug-2008 12:17


If you are loading xml with the intention of validating it against an internal dtd and you have experienced issues with the validation it could be related to missing LIBXML constants.



I found this post by "aidan at php dot net" in root level dom docs and thought it might be more useful here:

As of PHP 5.1, libxml options may be set using constants rather than the use of proprietary DomDocument properties.



DomDocument->resolveExternals is equivilant to setting

LIBXML_DTDLOAD

LIBXML_DTDATTR



DomDocument->validateOnParse is equivilant to setting

LIBXML_DTDLOAD

LIBXML_DTDVALID



PHP 5.1 users are encouraged to use the new constants.



Example:

<?php

$dom = new DOMDocument;

// Resolve externals

$dom->load($file, LIBXML_DTDLOAD|LIBXML_DTDATTR);

// OR 

// Validate against DTD

$dom->load($file, LIBXML_DTDLOAD|LIBXML_DTDVALID);

$dom->validate();

?>

the_N_Channel
15-Jul-2008 09:53


NOTE, will not load successfully if there is a comment at the beginning of the file before the <?xml version="1.0" ?> declaration!

hh dot lohmann at yahoo dot de
30-Aug-2007 08:48


BadGuy´s note may be confusing since what he depicts is no special property of the relevant method. PHP works always in and on a local file system which means that if you want to use resources from other systems or - what is, indeed, BadGuy´s problem - need resources that have been dealt with by other programs or processes, you have to state and manage that explicitly in your code. PHP is just a quite normal program in that.



BadGuy´s solution is using the "http wrapper" to get output from another process (see "wrappers" in the PHP manual). Doing this, the appropriate syntax for http calls has to be respected.

admin at tijnema dot tijnema dot info
02-Jun-2007 09:39


In reply to BadGuy [at] BadGuy [dot] nl



When the news.php file is located on the same server, like you said in the first example then http://my.beautiful-website.com/xmlsource/news.php wouldn't work, but you should use http://localhost/xmlsource/news.php or http://127.0.0.1/xmlsource/news.php

BadGuy [at] BadGuy [dot] nl
18-Jan-2007 02:50


Note that this method uses the local file system before doing anything remote. The 'disadvantage' would be that if you would do the following:

<?php

$xml = new DOMDocument;

$xml->load("xmlsource/news.php");

?>



This would not make the method read the actual output of the news.php file --presumably valid xml data--, but the file contents --obviously this would be php code. So this will return an error saying news.php is missing the xml declaration and maybe the xml start-tag



What would work is the following:



<?php

$xml = new DOMDocument;

$xml->load("http://my.beautiful-website.com/xmlsource/news.php");

?>



This will force a http request to be used to get this file instead of just locally reading it and the file just returning code

daevid at daevid dot com
18-Oct-2005 10:08


Suppose you wanted to dynamically load an array from an .XSD file. This method is your guy. just remember to use the actual xs: portion in xpaths and such.





All the other "load" methods will error out.





<?php


$attributes = array();


$xsdstring = "/htdocs/api/xsd/common.xsd";


$XSDDOC = new DOMDocument();


$XSDDOC->preserveWhiteSpace = false;


if ($XSDDOC->load($xsdstring))


{


    $xsdpath = new DOMXPath($XSDDOC);


    $attributeNodes = 


              $xsdpath->


              query('//xs:simpleType[@name="attributeType"]')


              ->item(0);


    foreach ($attributeNodes->childNodes as $attr) 


    {


        $attributes[ $attr->getAttribute('value') ] = $attr->getAttribute('name');


    }


    unset($xsdpath);


}


print_r($attributes);


?>

add a note

DOMDocument::loadHTML

DOMDocument::importNode

Last updated: Fri, 13 Nov 2009