PHP | DOMNodeList count() Function

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', 'GeeksforGeeks');

// Create another h1 elements
$text2 = new DOMElement('h1', 'Another GeeksforGeeks');

// 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:

2

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', 'GeeksforGeeks');

// Create another h1 elements
$text2 = new DOMElement('h1', 'Another GeeksforGeeks');

// 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();
?>

Output:

Before removing: 2
After removing: 1

Reference: https://www.php.net/manual/en/domnodelist.count.php