PHP | DOMDocument createElementNS() Function

The DOMDocument::createElementNS() function is an inbuilt function in PHP which is used to create a new element node with an associated namespace.

Syntax:

DOMElement DOMDocument::createElementNS( string $namespaceURI, 
                             string $qualifiedName, string $value )

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

• $namespaceURI: This parameter holds the URI of the namespace.
• $qualifiedName: This parameter holds the qualified name of the element, as prefix:tagname.
• $value: This parameter holds the value of the element. The default value of this parameter is empty or none, means an empty element created.

Return Value: This function returns the new DOMElement on success or FALSE on failure.

Below programs illustrate the DOMDocument::createElementNS() function in PHP:

Program 1:

<?php

// Create a new DOMDocument
$dom = new DOMDocument('1.0', 'utf-8');

// Use createElementNS() function to create new
// element node with an associated namespace
$element = $dom->createElementNS('https://www.geeksforgeeks.org/php',
        'php:function', 'Welcome to GeeksforGeeks');

// Append the child element
$dom->appendChild($element);

// Create XML document and diplsy it
echo $dom->saveXML();

?>

Output:

<?xml version="1.0" encoding="utf-8"?>
<php:function xmlns:php="https://www.geeksforgeeks.org/php">
    Welcome to GeeksforGeeks
</php:function>

Program 2:

<?php

// Create a new DOMDocument
$dom = new DOMDocument('1.0', 'utf-8');

// Use createElementNS() function to create new
// element node with an associated namespace
$element1 = $dom->createElementNS('https://www.geeksforgeeks.org/php',
        'organization:GeeksforGeeks', 'A computer science portal');

$element2 = $dom->createElementNS('https://www.geeks.org/html',
        'php:link', 'Welcome to GeeksforGeeks');

$element3 = $dom->createElementNS('https://www.geeksforgeeks.org/algo',
        'algo:link', 'Best coding platform');

// Append the child element
$dom->appendChild($element1);
$dom->appendChild($element2);
$dom->appendChild($element3);

// Create XML document and diplsy it
echo $dom->saveXML();

?>

Output:

<?xml version="1.0" encoding="utf-8"?>
<organization:GeeksforGeeks xmlns:organization
        ="https://www.geeksforgeeks.org/php">
    A computer science portal
</organization:GeeksforGeeks>

<php:link xmlns:php="https://www.geeks.org/html">
    Welcome to GeeksforGeeks
</php:link>

<algo:link xmlns:algo="https://www.geeksforgeeks.org/algo">
    Best coding platform
</algo:link>

Reference: https://www.php.net/manual/en/domdocument.createelementns.php