SimpleXML-Funktionen
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 — Übersetzt einen XML-String in ein Objekt
Beschreibung
object simplexml_load_string
( string $data
[, string $class_name
[, int $options
[, string $ns
[, bool $is_prefix
]]]] )
Die Funktion erwartet einen wohlgeformten (well-formed) XML-String und gibt ihn als Objekt zurück.
Parameter-Liste
- data
-
Ein wohlgeformter XML-String.
- class_name
-
Sie können den optionalen Parameter class_name verwenden, wenn simple_load_string() ein Objekt der spezifischen Klasse zurückgeben soll. Die gewählte Klasse sollte von der Klasse SimpleXMLElement abgeleitet sein.
- options
-
Seit PHP 5.1.0 und Libxml 2.6.0 können Sie zusätzlich den Parameter options verwenden, um weitere Libxml-Parameter anzugeben.
- ns
-
- is_prefix
-
Rückgabewerte
Gibt ein Objekt der Klasse SimpleXMLElement zurück, dessen Eigenschaften die Daten beinhalten, wie sie im XML-Dokument abgebildet sind. Tritt ein Fehler auf, wird FALSE zurück gegeben.
Beispiele
Beispiel #1 Einen XML-String auswerten
<?php
$string = <<<XML
<?xml version='1.0'?>
<document>
<title>Zweiundvierz...?</title>
<from>Joe</from>
<to>Jane</to>
<body>
Ich kenne die Antwort -- aber was ist die Frage?
</body>
</document>
XML;
$xml = simplexml_load_string($string);
var_dump($xml);
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
SimpleXMLElement Object ( [title] => Zweiundvierz...? [from] => Joe [to] => Jane [body] => Ich kenne die Antwort -- aber was ist die Frage? )
Ab diesem Punkt können Sie $xml->body etc. verwenden.
add a note
User Contributed Notessimplexml_load_string
nospam at qool dot com
05-Jun-2008 11:45
05-Jun-2008 11:45
hattori at hanso dot com
15-Oct-2007 03:19
15-Oct-2007 03:19
Theres a problem with the below workaround when serializing fields containing html CDATA. For any other content type then HTML try to modfiy function parseCDATA.
Just add these lines before serializing.
This is also a workaround for this bug http://bugs.php.net/bug.php?id=42001
<?PHP
if(strpos($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.