PHP | XMLWriter startAttributeNs() Function

The XMLWriter::startAttributeNs() function is an inbuilt function in PHP which is used to start namespaced attribute. This attribute can be later closed with XMLWriter::endAttribute() function. Usually styling web pages doesn't works in a namespace attribute. Syntax:

bool XMLWriter::startAttributeNs( string $prefix, 
string $name, string $uri )

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

$prefix: It specifies the prefix for the namespace.
$name: It specifies the name for the namespace.
$uri: It specifies the value for the namespace.

Return Value: This function returns TRUE on success or FALSE on failure. Below examples illustrate the XMLWriter::startAttributeNs() function in PHP: Example 1:

php

<?php

// Create a new XMLWriter instance
$writer = new XMLWriter();
 
// Create the output stream as PHP
$writer->openURI('php://output');
 
// Start the document
$writer->startDocument('1.0', 'UTF-8');
 
// Start a element
$writer->startElement('div');
 
// Start the namespaced attribute
$writer->startAttributeNs('pre', 'attrib', 'value');
 
// Add value to the attribute
$writer->text('value');
 
// End the attribute
$writer->endAttribute();
 
// End the element
$writer->endElement();
 
// End the document
$writer->endDocument();
?>

Output:

<?xml version="1.0" encoding="UTF-8"?>
<div pre:attrib="value" xmlns:pre="value"/>

Example 2:

php

<?php

// Create a new XMLWriter instance
$writer = new XMLWriter();
 
// Create the output stream as PHP
$writer->openURI('php://output');
 
// Start the document
$writer->startDocument('1.0', 'UTF-8');
 
// Start a element
$writer->startElement('div');
 
// Start the namespaced attribute with style attribute
// This will not work because it is namespaced
$writer->startAttributeNs('style', 'attrib', 'value');
 
// Add value to the attribute
$writer->text('color:blue');
 
// End the attribute
$writer->endAttribute();

// Add value to the element
$writer->text('Namespaced GeeksforGeeks');
 
// End the element
$writer->endElement();

// Start a h1 element
$writer->startElement('h1');
 
// Start the style attribute
$writer->startAttribute('style');
 
// Add value to the attribute
$writer->text('color:green');
 
// End the attribute
$writer->endAttribute();
 
// Add value to the element
$writer->text('Normal GeeksforGeeks');
 
// End the element
$writer->endElement();
 
// End the document
$writer->endDocument();
?>

Output:

PHP | XMLWriter startAttributeNs() Function

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