PHP | SimpleXMLElement addAttribute() Function

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The SimpleXMLElement::addAttribute() function is an inbuilt function in PHP which add an attribute in a SimpleXML object.

Syntax:

void SimpleXMLElement::addAttribute($name, $value, $namespace)

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

$name: It is required parameter. It specifies the name of the attribute to be added.
$value: It is optional parameter. It specifies the value of the attribute to be added.
$namespace: It is optional parameter. It specifies namespace for the attribute.

Return Value: This function does not accepts any parameters.

Note: This function is available for PHP 5.1.3 and newer version.

Example:

<?php 
  
// Loading XML document to $user 
$user = <<<XML 
<user> 
<username> user123 </username> 
<name> firstname lastname </name> 
<phone> +91-9876543210 </phone> 
<detail> I am John Doe. Live in Kolkata, India. </detail> 
</user> 
XML; 
  
// Creating new SimpleXMLElement 
// object from $user 
$xml = new SimpleXMLElement($user); 
  
// Adding child named "institution"  
// and valued "zambiatek" 
$xml->addChild("institution", "zambiatek"); 
  
// Adding attribute named "type" and value 
// "educational" in institution element. 
$xml->institution->addAttribute("type", "educational"); 
  
// Printing as XML 
echo $xml->asXML(); 
echo $xml->asXML('savexmltofile.xml'); 
  
?> 

Output:

user123 firstname lastname +91-9876543210 I am John Doe.
Live in Kolkata, India. zambiatek 1

Source code in browser:

<?xml version="1.0"?> 
<user> 
<username> user123 </username> 
<name> firstname lastname </name> 
<phone> +91-9876543210 </phone> 
<detail> I am John Doe. Live in Kolkata, India. </detail> 
<institution type="educational">zambiatek</institution></user> 
<br>1 