SimpleXMLElement::addAttribute

(PHP 5 >= 5.1.3, PHP 7)

SimpleXMLElement::addAttribute Adds an attribute to the SimpleXML element

Descrierea

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

Adds an attribute to the SimpleXML element.

Parametri

name

The name of the attribute to add.

value

The value of the attribute.

namespace

If specified, the namespace to which the attribute belongs.

Valorile întoarse

Nu este întoarsă nici o valoare.

Exemple

Notă:

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

Example #1 Add attributes and children to a SimpleXML element

<?php

include 'example.php';
 
$sxe = new SimpleXMLElement($xmlstr);
$sxe->addAttribute('type''documentary');

$movie $sxe->addChild('movie');
$movie->addChild('title''PHP2: More Parser Stories');
$movie->addChild('plot''This is all about the people who make it work.');

$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();

?>

Exemplul de mai sus va afișa ceva similar cu:

<?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>

A se vedea și

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User Contributed Notes 4 notes

up
2
Patanjali
7 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
13 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
12 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
12 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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