SimpleXMLElement::attributes

(PHP 5 >= 5.0.1)

SimpleXMLElement::attributesIdentifie les attributs d'un élément

Description

public SimpleXMLElement SimpleXMLElement::attributes ([ string $ns = NULL [, bool $is_prefix = false ]] )

Fournit les attributs et les valeurs définies dans une balise XML.

Note: SimpleXML ajoute des propriétés itératives pour presque toutes ses méthodes. Celles-ci ne peuvent être vues en utilisant var_dump() ou tout autre fonction qui examine les objets.

Liste de paramètres

ns

Un espace de noms optionnel pour les attributs récupérés

is_prefix

Par défaut, vaut FALSE

Valeurs de retour

Retourne un objet SimpleXMLElement qui permettant de retrouver tous les attributs d'une balise.

Retourne NULL si appelé sur un objet SimpleXMLElement qui représente déjà un attribut et non une balise.

Exemples

Exemple #1 Interprétation d'une chaîne XML

<?php
$string 
= <<<XML
<a>
 <foo name="one" game="lonely">1</foo>
</a>
XML;

$xml simplexml_load_string($string);
foreach(
$xml->foo[0]->attributes() as $a => $b) {
    echo 
$a,'="',$b,"\"\n";
}
?>

L'exemple ci-dessus va afficher :

name="one"
game="lonely"

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User Contributed Notes 13 notes

up
5
webfelipemaia at gmail dot com
7 months ago
Use attributes to display when it meets certain condition defined attribute / value in xml tags.

Use atributos para exibir quando atende determinada condição definida atributo / valor em tags XML.

Consider the following example:
Considere o seguinte exemplo:

(file.xml)

<?xml version="1.0" encoding="UTF-8"?>

<list>
    <item type="Language">
        <name>PHP</name>
        <link>www.php.net</link>
    </item>
    <item type="Database">
        <name>Java</name>
        <link>www.oracle.com/br/technologies/java/‎</link>
    </item>
</list>

Checks if the attribute value equals "Language", if equal prints everything that is related to "Language".

Verifica se o valor do atributo é igual a "Language", se for, imprime tudo o que for relativo ao mesmo.

<?php

$xml
= simplexml_load_file("file.xml");

foreach(
$xml->children() as $child) {
   
       
$role = $child->attributes();

        foreach(
$child as $key => $value) {
           
            if(
$role == "Language")
            echo(
"[".$key ."] ".$value . "<br />");
           
        }
}
?>

output:
saída:

[name] PHP
[link] www.php.net
up
6
chris at chlab dot ch
2 years ago
Note that you must provide the namespace if you want to access an attribute of a non-default namespace:

Consider the following example:

<?php
$xml
= <<<XML
<?xml version="1.0"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">
 <Table Foo="Bar" ss:ExpandedColumnCount="7">
 </Table>
</Workbook>
XML;

$sxml = new SimpleXMLElement($xml);

/**
 * Access attribute of default namespace
 */
var_dump((string) $sxml->Table[0]['Foo']);
// outputs: 'Bar'

/**
 * Access attribute of non-default namespace
 */
var_dump((int) $sxml->Table[0]['ExpandedColumnCount']);
// outputs: 0

var_dump((int) $sxml->Table[0]->attributes('ss', TRUE)->ExpandedColumnCount);
// outputs: '7'
?>
up
5
totalwipeout at gmail dot com
1 year ago
Tip to get a real array of all attributes of a node (not SimpleXML's object acting like an array)

<?php
//- $node is a SimpleXMLElement object

$atts_object = $node->attributes(); //- get all attributes, this is not a real array
$atts_array = (array) $atts_object; //- typecast to an array

//- grab the value of '@attributes' key, which contains the array your after
$atts_array = $atts_array['@attributes'];

var_dump($atts_object); //- outputs object(SimpleXMLElement)[19]
                        //-             public '@attributes' => ...

var_dump($atts_array); //- outputs array (size=11) ...

?>
Hope this helps!
up
6
Xeoncross
4 years ago
It is really simple to access attributes using array form. However, you must convert them to strings or ints if you plan on passing the values to functions.

<?php
SimpleXMLElement Object
(
    [@
attributes] => Array
        (
            [
id] => 55555
       
)

    [
text] => "hello world"
)
?>

Then using a function

<?php
function xml_attribute($object, $attribute)
{
    if(isset(
$object[$attribute]))
        return (string)
$object[$attribute];
}
?>

I can get the "id" like this

<?php
print xml_attribute($xml, 'id'); //prints "55555"
?>
up
6
sarlak
2 years ago
<?php
$att
= 'attribueName';

// You can access an element's attribute just like this :
$attribute = $element->attributes()->$att;

// This will save the value of the attribute, and not the objet
$attribute = (string)$element->attributes()->$att;

// You also can edit it this way :
$element->attributes()->$att = 'New value of the attribute';
?>
up
2
leap
3 years ago
If you want to save the value of an attribute into an array, typecast it to a string.

<?php
// stores an xml-element-object
$dataStore['value'] = $attributes->myValue

// stores the value of the attribute
$dataStore['value'] = (string)$attributes->myValue
?>
up
1
alan at performantsystems dot com
3 years ago
So lets say you have database type data in an XML string called $xmlstring with the key or item ID as an XML Attribute and all content data as regular XML Elements, as above. SimpleXML processes the Attributes as an array, so we can play along and push the Attributes into an array. Then we can get the value of any specific Attribute we want by addressing it by name, such as "ID".

Considering this data:

<?xml version="1.0" encoding="utf-8"?>
<data>
   <item ID="30001">
      <Company>Navarro Corp.</Company>
   </item>
   <item ID="30002">
      <Company>Performant Systems</Company>
   </item>
   <item ID="30003">
      <Company>Digital Showcase</Company>
   </item>
</data>

Example of listing both the ID Attribute and Company Element values:
 
<?php
$xmlObject
= new SimpleXMLElement($xmlstring);
foreach (
$xmlObject->children() as $node) {
       
$arr = $node->attributes();   // returns an array
       
print ("ID=".$arr["ID"]);     // get the value of this attribute
       
print ("  Company=".$node->Company);
        print (
"<p><hr>");
}
?>
up
1
adrian at foeder dot de
10 months ago
in order to get a possibly present xml:space attribute, use the following construct:

<?php
$simpleXmlElement
->element->attributes('http://www.w3.org/XML/1998/namespace')->space;
?>

This will, for example, return 'preserve' if set.

Just passing by 'xml' as namespace argument of the attribute() method didn't work out for me. Passing by the complete namespace URI works also if it is not explicitly defined in the underlying XML document.

Also, $simpleXmlElement->getNamespaces() does not return anything of use.
up
1
skerr at mojavi dot org
9 years ago
You can also access the node as an array to get attributes:

<?php

$xml
= simplexml_load_file('file.xml');

echo
'Attribute: ' . $xml['attribute'];

?>
up
0
Andrei
2 years ago
Reading the attributes of the root element with name space prefixes as in an Atom feed

<feed xmlns="http://www.w3.org/2005/Atom" xmlns:openSearch="http://a9.com/-/spec/opensearch/1.1/" xmlns:gd="http://schemas.google.com/g/2005" gd:etag="W/&quot;Ck4EQXYzeCp7ImA9WhZWFE4.&quot;">

<?php
$xml
=  @simplexml_load_file($feed);
$att_gd = $xml->attributes("gd",1);
$Etag = $att_gd["etag"];
?>
up
0
inge at elektronaut dot no
9 years ago
here's a simple function to get an attribute by name, based on the example

<?php
function findAttribute($object, $attribute) {
  foreach(
$object->attributes() as $a => $b) {
    if (
$a == $attribute) {
     
$return = $b;
    }
  }
  if(
$return) {
    return
$return;
  }
}
?>
up
-1
asifworking38 at gmail dot com
7 months ago
How I will use this for an External XML file..?

<?php
$xml
= <<<XML
<?xml version="1.0"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">
 <Table Foo="AsifMushtaq" ss:ExpandedColumnCount="7">
 </Table>
</Workbook>
XML;

$sxml = new SimpleXMLElement($xml);

/**
 * Access attribute of default namespace
 */
var_dump((string) $sxml->Table[0]['Foo']);
// outputs: 'Bar'

/**
 * Access attribute of non-default namespace
 */
var_dump((int) $sxml->Table[0]['ExpandedColumnCount']);
// outputs: 0

var_dump((int) $sxml->Table[0]->attributes('ss', TRUE)->ExpandedColumnCount);
// outputs: '7'
?>
up
-1
gillllberg at gmail dot com
4 years ago
To get an attribute in the node, use node->attributes()->attributeName
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