The DOMNamedNodeMap::count() function is an inbuilt function in PHP which is used to get the number of nodes in the map. It can be used to count attributes of a element.
Syntax:
int DOMNamedNodeMap::count( void )
Parameters: This function doesn’t accepts any parameter.
Return Value: This function returns and integer value containing the number of nodes in the map.
Below examples illustrate the DOMNamedNodeMap::count() function in PHP:
Example 1: In this example we will count the attributes of a element.
<?php // Create a new DOMDocument $dom = new DOMDocument(); // Load the XML $dom->loadXML("<?xml version=\"1.0\"?> <root> <html> <h1 id=\"first\" class=\"first\" style=\"color: blue\"> Geeksforneveropen </h1> </html> </root>"); // Get the elements $node = $dom->getElementsByTagName('h1')[0]; // Get the attribute count $attributeCount = $node->attributes->count(); echo 'No of attributes => ' . $attributeCount; ?> |
Output:
No of attributes => 3
Example 2: In this example we will check if count function fetches the latest no of attributes or not by altering the number of attributes.
<?php // Create a new DOMDocument $dom = new DOMDocument(); // Load the XML $dom->loadXML("<?xml version=\"1.0\"?> <root> <html> <h1 id=\"first\" class=\"first\"> Geeksforneveropen </h1> <h2> Second heading </h2> </html> </root>"); // Get the elements $node = $dom->getElementsByTagName('h1')[0]; echo "Before the addition of attributes: <br>"; // Get the attribute count $attributeCount = $node->attributes->count(); echo 'No of attributes => ' . $attributeCount; // Set the id attribute $node->setAttribute('new', 'value'); echo "<br>After the addition of attributes: <br>"; // Get the attribute count $attributeCount = $node->attributes->count(); echo 'No of attributes => ' . $attributeCount; ?> |
Output:
Before the addition of attributes: No of attributes => 2 After the addition of attributes: No of attributes => 3
Reference: https://www.php.net/manual/en/domnamednodemap.count.php
