PHP | DOMElement setIdAttributeNode() Function

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The DOMElement::setIdAttributeNode() function is an inbuilt function in PHP which is used to declare the attribute specified by DOMAttr instance to be of type ID.

Syntax:

void DOMElement::setIdAttributeNode( DOMAttr $attr, bool $isId )

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

$attr: It specifies the attribute as a DOMAttr instance.
$isId: It specifies whether if you want name to be of type ID.

Return Value: This function returns nothing.

Exceptions: This function throws DOM_NO_MODIFICATION_ALLOWED_ERR, if the node is readonly or DOM_NOT_FOUND, if name is not an attribute of this element.

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

Example 1:

<?php 
  
// Create a new DOM Document 
$dom = new DOMDocument('1.0', 'iso-8859-1'); 
   
// Enable validate on parse 
$dom->validateOnParse = true; 
   
// Create a div element 
$element = $dom->appendChild(new DOMElement 
                  ('div', 'GEEKSFORGEEKS')); 
  
// Create the id element  
$id = new DOMAttr('id', 'zambiatek'); 
  
// Create a id attribute to div 
$attr = $element->setAttributeNode($id); 
  
// Set that attribute as id 
$element->setIDAttributeNode($id, true); 
  
echo $dom->saveXML(); 
?> 

Output:

Example 2:

<?php 
  
// Create a new DOM Document 
$dom = new DOMDocument('1.0', 'iso-8859-1'); 
   
// Enable validate on parse 
$dom->validateOnParse = true; 
   
// Create a div element 
$element = $dom->appendChild(new DOMElement 
                 ('div', 'Hey ! This is my content.')); 
  
// Create the id element  
$id = new DOMAttr('id', 'zambiatek'); 
  
// Create a id attribute to div 
$attr = $element->setAttributeNode($id); 
  
// Set that attribute as id 
$element->setIDAttributeNode($id, true); 
  
// Get the text of element with id='zambiatek' 
// just to see if it works 
$value = $dom->getElementById('zambiatek')->textContent; 
    
echo $value; 
?> 