PHP | DOMElement getAttributeNS() Function

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The DOMElement::getAttributeNS() function is an inbuilt function in PHP which is used to get the value of the attribute in a specific namespace with local name for the current node.

Syntax:

string DOMElement::getAttributeNS( string $namespaceURI, 
string $localName )

Parameters: This function accepts two parameters as mentioned above and described below:

$namespaceURI: It specifies the namespace URI.
$localName: It specifies the local name.

Return Value: This function returns a string value containing the value of attribute, or an empty string if no attribute with the given localName and namespaceURI is found.

Below examples illustrate the DOMElement::getAttributeNS() function in PHP:

Example 1:

<?php 
  
// Create a new DOMDocument 
$dom = new DOMDocument(); 
  
// Load the XML 
$dom->loadXML("<?xml version=\"1.0\"?> 
<body xmlns:x=\"my_namespace\"> 
    <x:div x:attr=\"value\" > DIV 1 </x:div> 
</body>"); 
  
// Get the elements by tagname 
$elements = $dom->getElementsByTagName('div'); 
  
// Get the attribute node value 
$nodeValue = $elements[0]->getAttributeNS('my_namespace', 'attr'); 
  
echo $nodeValue; 
?> 

Output:

value

Example 2:

<?php 
  
// Create a new DOMDocument 
$dom = new DOMDocument(); 
  
// Load the XML 
$dom->loadXML("<?xml version=\"1.0\"?> 
<root> 
<body xmlns:x=\"my_namespace1\"> 
    <x:div x:id=\"my_id1\" > DIV 1 </x:div> 
    <x:div x:id=\"my_id2\" > DIV 1 </x:div> 
</body> 
<body xmlns:xi=\"my_namespace2\"> 
    <xi:div xi:id=\"new\" > DIV 1 </xi:div> 
</body> 
</root>"); 
  
// Get the elements by tagname 
$elements = $dom->getElementsByTagName('div'); 
  
foreach ($elements as $element) { 
  
    // Get node value only from my_namespace1 
    $nodeValue = $element->getAttributeNS('my_namespace1', 'id'); 
  
    if ($nodeValue) { 
       echo $nodeValue . '<br>'; 
    } 
} 
?> 