SimpleXML Functions
simplexml doesn't appear to like long attributes. I have tried passing it a valid xhtml document but the url in the anchor tag was causing simplexml to generate an error.
simplexml_load_string
(PHP 5)
simplexml_load_string — Interpreta una cadena XML en un objeto
Descripción
object simplexml_load_string
( string $data
[, string $class_name
[, int $options
]] )
Esta función tomará una cadena xml válida data y devolverá un object de clase SimpleXMLElement con propiedades conteniendo la información del documento xml. Si ocurre cualquier error, se devolverá FALSE.
También puedes usar el parámetro opcional class_name de forma que simplexml_load_string() devolverá un objeto de la clase especificada. Esa clase debe extender la clase SimpleXMLElement.
Desde PHP 5.1.0 y Libxml 2.6.0, también puedes usar el parámetro options para especificar parámetros de Libxml adicionales.
Example #1 Interpreta una cadena XML
<?php
$string = <<<XML
<?xml version='1.0'?>
<document>
<title>Forty What?</title>
<from>Joe</from>
<to>Jane</to>
<body>
I know that's the answer -- but what's the question?
</body>
</document>
XML;
$xml = simplexml_load_string($string);
var_dump($xml);
?>
This script will display:
SimpleXMLElement Object ( [title] => Forty What? [from] => Joe [to] => Jane [body] => I know that's the answer -- but what's the question? )
A partir de aquí, puedes puedes acceder al nodo body mediante $xml->body y a cualquier otro elemento.
Vea también: simplexml_load_file().
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User Contributed Notessimplexml_load_string
nospam at qool dot com
05-Jun-2008 11:45
05-Jun-2008 11:45
hattori at hanso dot com
15-Oct-2007 03:19
15-Oct-2007 03:19
Theres a problem with the below workaround when serializing fields containing html CDATA. For any other content type then HTML try to modfiy function parseCDATA.
Just add these lines before serializing.
This is also a workaround for this bug http://bugs.php.net/bug.php?id=42001
<?PHP
if(strpos($content, '<![CDATA[')) {
function parseCDATA($data) {
return htmlentities($data[1]);
}
$content = preg_replace_callback(
'#<!\[CDATA\[(.*)\]\]>#',
'parseCDATA',
str_replace("\n", " ", $content)
);
}
?>
hattori at hanso dot com
17-Sep-2007 02:15
17-Sep-2007 02:15
If you want to serialize and unserialize SimpleXMLElement objects for caching, you need to transform the SimpleXMLElement object into a standard class object before unserializing.
This is only if you want to cache converted data, the functionallity of the SimpleXMLElement will not be held.
$content = '<SomeXML....'
$serialized = str_replace(
array('O:16:"SimpleXMLElement":0:{}', 'O:16:"SimpleXMLElement":'),
array('s:0:"";', 'O:8:"stdClass":'),
serialize(simplexml_load_string($content))
);
$unserialized = unserialize($serialized);
nbijnens at servs dot eu
10-Sep-2007 05:17
10-Sep-2007 05:17
Please note that not all LIBXML options are supported with the options argument.
For instance LIBXML_XINCLUDE does not work. But there is however a work around:
<?php
$xml = new DOMDocument();
$xml->loadXML ($XMLString);
$xml->xinclude();
$xml = simplexml_import_dom($xml);
?>
Pedro
06-Jul-2007 01:28
06-Jul-2007 01:28
Attention:
simplexml_load_string has a problem with entities other than (<, >, &, " and ').
Use numeric character references instead!
youx_free_fr
23-May-2007 09:52
23-May-2007 09:52
While needing to add an xml subtree to an existing simplexml object, I noticed that simplexml_load_string fails with strings like
<emptynode></emptynode>
I needed to use dom instead of simplexml to bypass this problem and work with any kind of xml strings.
David Somerset
08-May-2007 11:39
08-May-2007 11:39
Another option for having simplexml convert CDATA into plain text is to simply type cast the result to string. Here's an example:
$xmlRoot = simplexml_load_string('<?xml version="1.0"?>
<tvshows>
<show>
<name>The Simpsons</name>
</show>
<show>
<name><![CDATA[Lois & Clark]]></name>
</show>
</tvshows>');
$show = array();
foreach($xmlRoot as $val){
$show[] = (string) $val->name;
}
php at teamhirsch dot com
24-Apr-2007 02:46
24-Apr-2007 02:46
It's worth noting that in the example above, $xml->body will actually return an object of type SimpleXMLElement, not a string, e.g.
SimpleXMLElement Object (
[0] => this is the text in the body tag
)
If you want to get a string out of it you must explicitly cast it using (string) or double quotes, or pass $xml->body (or whatever attribute you want to access) to any function that returns a string, such as urldecode() or trim().
m dot ament at mailcity dot com
06-Mar-2007 06:51
06-Mar-2007 06:51
Warning:
The parsing of XML-data will stop when reaching character 0.
Please avoid this character in your XML-data.
mindpower
30-Jan-2007 03:03
30-Jan-2007 03:03
A simple extension that adds a method for retrieving a specific attribute:
<?php
class simple_xml_extended extends SimpleXMLElement
{
public function Attribute($name)
{
foreach($this->Attributes() as $key=>$val)
{
if($key == $name)
return (string)$val;
}
}
}
$xml = simplexml_load_string('
<xml>
<dog type="poodle" owner="Mrs Smith">Rover</dog>
</xml>', 'simple_xml_extended');
echo $xml->dog->Attribute('type');
?>
outputs 'poodle'
I prefer to use this technique rather than typecasting attributes.
h
15-Nov-2006 10:44
15-Nov-2006 10:44
seems like simplexml has a line-length restriction - fails if a largeish XML doc with no linebreaks is passed as a string or file.
h
paul at santasoft dot com
25-Jul-2006 08:22
25-Jul-2006 08:22
If you have PHP > 5.1 and LibXML > 2.6, use this function call to have simplexml convert CDATA into plain text.
simplexml_load_string($xmlstring, 'SimpleXMLElement', LIBXML_NOCDATA);
Too bad, so sad with PHP < 5.1.