SimpleXMLElement::asXML
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>");
}
?>
SimpleXMLElement::attributes
(PHP 5 >= 5.0.1)
SimpleXMLElement::attributes — 要素の属性を定義する
説明
SimpleXMLElement SimpleXMLElement::attributes
([ string $ns
[, bool $is_prefix
]] )
この関数は、XMLタグの中で定義された属性とその値を取得します。
注意: SimpleXML では、ほとんどのメソッドに反復処理を追加するための手順が定義されています。 これらは、var_dump() やオブジェクトを評価する他の手段で 見ることはできません。
パラメータ
- ns
-
オプションで指定する、取得した属性の名前空間。
- is_prefix
-
デフォルトは FALSE。
返り値
例
例1 XML文字列を解釈する
<?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";
}
?>
上の例の出力は以下となります。
name="one" game="lonely"
add a note
User Contributed NotesSimpleXMLElement::attributes
alan at performantsystems dot com
24-May-2010 05:26
24-May-2010 05:26
Xeoncross
11-Apr-2010 02:46
11-Apr-2010 02:46
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"
?>
gillllberg at gmail dot com
04-Nov-2009 10:21
04-Nov-2009 10:21
To get an attribute in the node, use node->attributes()->attributeName
skerr at mojavi dot org
10-Dec-2004 06:55
10-Dec-2004 06:55
You can also access the node as an array to get attributes:
<?php
$xml = simplexml_load_file('file.xml');
echo 'Attribute: ' . $xml['attribute'];
?>
inge at elektronaut dot no
26-May-2004 05:53
26-May-2004 05:53
here's a simple function to get an attribute by name, based on the example
<?php
function findAttribute($object, $attribute) {
foreach($object->attributes() as $a => $b) {
if ($a == $attribute) {
$return = $b;
}
}
if($return) {
return $return;
}
}
?>