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The SimpleXMLElement class




(PHP 5 >= 5.0.1)

SimpleXMLElement::__construct Creates a new SimpleXMLElement object


public SimpleXMLElement::__construct() ( string $data [, int $options = 0 [, bool $data_is_url = false [, string $ns = "" [, bool $is_prefix = false ]]]] )

Creates a new SimpleXMLElement object.



A well-formed XML string or the path or URL to an XML document if data_is_url is TRUE.


Optionally used to specify additional Libxml parameters.


By default, data_is_url is FALSE. Use TRUE to specify that data is a path or URL to an XML document instead of string data.




Returns a SimpleXMLElement object representing data.


Produces an E_WARNING error message for each error found in the XML data and throws an exception if errors were detected.


Use libxml_use_internal_errors() to suppress all XML errors, and libxml_get_errors() to iterate over them afterwards.



Listed examples may include example.php, which refers to the XML string found in the first example of the basic usage guide.

Beispiel #1 Create a SimpleXMLElement object


include 'example.php';

$sxe = new SimpleXMLElement($xmlstr);


Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

PHP: Behind the Parser

Beispiel #2 Create a SimpleXMLElement object from a URL


= new SimpleXMLElement(''NULLTRUE);


Siehe auch

4 BenutzerBeiträge:
- Beiträge aktualisieren...
zwilson at gulosolutions dot com
19.11.2009 19:16
SimpleXML does not correctly parse SOAP XML results if the result comes back with colons ‘:’ in a tag, like <soap:Envelope>. Why? Because SimpleXML treats the colon character ‘:’ as an XML namespace, and places the entire contents of the SOAP XML result inside a namespace within the SimpleXML object. There is no real way to correct this using SimpleXML, but we can alter the raw XML result a little before we send it to SimpleXML to parse.

All we have to do is use the preg_replace function to get rid of the colons in the SOAP response tags BEFORE you hand it off to SimpleXML, like so:

// SimpleXML seems to have problems with the colon ":" in the <xxx:yyy> response tags, so take them out
$xmlString = preg_replace("/(<\/?)(\w+):([^>]*>)/", "$1$2$3", $response);
uramihsayibok, gmail, com
17.08.2009 3:52
As I was filling out a bug report, I realized why (speculation here) the constructor is final: so that functions like simplexml_load_file and simplexml_load_string can work. I imagine the PHP-ized code looks something like


function simplexml_load_file($filename, $class_name = "SimpleXMLElement", $options = 0, $ns = "", $is_prefix = false) {
    return new
$class_name($filename, $options, true, $ns, $is_prefix);


If we were to use a different $class_name and change the constructor's definition these functions wouldn't work.

There's no easy, sensible solution that keeps simplexml_load_file and simplexml_load_string.
alvaro at demogracia dot com
30.09.2008 10:42
A note about the undocumented parameters:

$ns (string): namespace prefix or URI
$is_prefix (bool): TRUE if $ns is a prefix, FALSE if it's a URI; defaults to FALSE


= '<xml xmlns:foo='uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882'>

$a = new SimpleXMLElement($xml_string, NULL, FALSE, 'foo', TRUE);
$b = new SimpleXMLElement($xml_string, NULL, FALSE, 'uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882', FALSE);

However, I don't know exactly what these parameters are used for. They don't seem to be of much help when dealing with namespaces :-?
tudor at culise dot net
20.11.2007 12:35
This class is extendable, but it's too bad that its constructor cannot be overriden (PHP says it's a final method). Thus the class should be wrapped using the delegation principle rather that extended.

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