SimpleXMLElement::addAttribute

(PHP 5 >= 5.1.3, PHP 7)

SimpleXMLElement::addAttributeFügt einem SimpleXML-Element ein Attribut hinzu

Beschreibung

public SimpleXMLElement::addAttribute ( string $name [, string $value [, string $namespace ]] ) : void

Fügt einem SimpleXML-Element ein Attribut hinzu.

Parameter-Liste

name

Der Name des hinzuzufügenden Attributs.

value

Der Wert des Attributs.

namespace

Wenn angegeben, der Namespace, zu dem das Attribut gehört.

Rückgabewerte

Es wird kein Wert zurückgegeben.

Beispiele

Hinweis:

Die aufgeführten Beispiele binden möglicherweise example.php ein, das die XML-Zeichenkette enthält, die im ersten Beispiel über die grundlegende Verwendung zu finden ist.

Beispiel #1 Hinzufügen von Attributen und Kindern zu einem SimpleXML-Element

<?php

include 'example.php';

$sxe = new SimpleXMLElement($xmlstr);
$sxe->addAttribute('type''documentary');

$movie $sxe->addChild('movie');
$movie->addChild('title''PHP2: Noch mehr Parser-Geschichten');
$movie->addChild('plot''Alles ueber die Leute, die das Kind am Leben erhalten.');

$characters $movie->addChild('characters');
$character  $characters->addChild('character');
$character->addChild('name''Mr. Parser');
$character->addChild('actor''John Doe');

$rating $movie->addChild('rating''5');
$rating->addAttribute('type''stars');

echo 
$sxe->asXML();

?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

<?xml version="1.0" standalone="yes"?>
<movies type="documentary">
 <movie>
  <title>PHP: Behind the Parser</title>
  <characters>
   <character>
    <name>Ms. Coder</name>
    <actor>Onlivia Actora</actor>
   </character>
   <character>
    <name>Mr. Coder</name>
    <actor>El Act&#xD3;r</actor>
   </character>
  </characters>
  <plot>
   So, this language. It's like, a programming language. Or is it a
   scripting language? All is revealed in this thrilling horror spoof
   of a documentary.
  </plot>
  <great-lines>
   <line>PHP solves all my web problems</line>
  </great-lines>
  <rating type="thumbs">7</rating>
  <rating type="stars">5</rating>
 </movie>
 <movie>
  <title>PHP2: More Parser Stories</title>
  <plot>This is all about the people who make it work.</plot>
  <characters>
   <character>
    <name>Mr. Parser</name>
    <actor>John Doe</actor>
   </character>
  </characters>
  <rating type="stars">5</rating>
 </movie>
</movies>

Siehe auch

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User Contributed Notes 4 notes

up
2
Patanjali
3 years ago
You cannot use this to update an existing attribute's value.

Instead, get a DOM version of the SimpleXMLElement and use setAttribute, as per:

$XML = '<element a="aa">Text</element>';
$snode = new simple_xml_element($XML);

$dnode = dom_import_simplexml($snode);
$dnode->setAttribute('a', 'bb');

Resulting XML for the node is:
<element a="bb">Text</element>
up
3
booleer at yahoo dot it
8 years ago
If the attribute already exists, addAttribute does nothing.

example:
<?php
$xml_string
= <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<root>
   <item id="foo">
<root>
XML;

$xml = simplexml_load_string($xml_string);
$xml->item->addAttribute('id', 'bar');
echo
$xml->asXML();
?>

The above examples will output:
<?xml version="1.0" encoding="UTF-8"?>
<root>
   <item id="foo">
<root>
up
1
p.servus
8 years ago
If you need an Namespace, you must write a Prefix of the Namespace + the Name of the Attribute ("prefix:name") as the first parameter AND the uri as the third one. (I don't know why?!)

Example code:
<?php
$xml
= new SimpleXMLElement("<packagedElement></packagedElement>");
$xml->addAttribute("xmi:type", "uml:Class", "http://schema.omg.org/spec/XMI/2.1");
echo
$xml->asXml();
?>

Output:
<packagedElement xmlns:xmi="http://schema.omg.org/spec/XMI/2.1" xmi:type="uml:Class"></packagedElement>
up
0
sarlak
8 years ago
You can access a node child with his name this way :

<?php
$root
= new SimpleXMLElement($filePath);
echo
$root->nodeName->attributes;

// It works recursivly so this will work too
echo $root->nodeName->subNodeName->attributes();
?>

But if you want to ADD an attribute to a children you MUST use the children() method to access and modfiy it or it will modify the parent's attributes.

<?php
// Add a subnode
$element->nodeName->addChild('subNodeName', "whatever you want");
               
// Get the pos in the childrens of the parent node
$lastNodePos = $element->nodeName->count()-1;

// Get the parents node childrens
$nodeChildrens = $element->nodeName->children();

// Add an attribute to the last created
$nodeChildrens[$lastNodePos]->addAttribute('attributeName', "The attribute value);
?>
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