PHP | DOMNodeList count() Function

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The DOMNodeList::count() function is an inbuilt function in PHP which is used to get the number of nodes in the list.

Syntax:

int DOMNodeList::count( void )

Parameters: This function doesn’t accept any parameter.

Return Value: This function returns the number of nodes in the list.

Below examples illustrate the DOMNodeList::count() function in PHP:

Example 1:

<?php 
  
// Create a new DOMDocument instance 
$document = new DOMDocument(); 
  
// Create a div element 
$element = $document->appendChild(new DOMElement('div')); 
  
// Create a h1 element 
$text1 = new DOMElement('h1', 'zambiatek'); 
  
// Create another h1 elements 
$text2 = new DOMElement('h1', 'Another zambiatek'); 
  
// Append the nodes 
$element->appendChild($text1); 
$element->appendChild($text2); 
  
// Get all elements with tag name 'h1' 
$elements = $document->getElementsByTagName('h1'); 
  
// Count the elements 
echo $elements->count(); 
?> 

Output:

Example 2:

<?php 
  
// Create a new DOMDocument instance 
$document = new DOMDocument(); 
  
// Create a div element 
$element = $document->appendChild(new DOMElement('div')); 
  
// Create a h1 element 
$text1 = new DOMElement('h1', 'zambiatek'); 
  
// Create another h1 elements 
$text2 = new DOMElement('h1', 'Another zambiatek'); 
  
// Append the nodes 
$element->appendChild($text1); 
$element->appendChild($text2); 
  
// Get all elements with tag name 'h1' 
$elements = $document->getElementsByTagName('h1'); 
   
// Count the elements 
echo 'Before removing: '; 
echo $elements->count() . "<br>"; 
  
// Remove  a child 
$element->removeChild($text2); 
  
// Get all elements with tag name 'h1' 
$elements = $document->getElementsByTagName('h1'); 
   
// Count the elements 
echo 'After removing: '; 
echo $elements->count(); 
?> 