PHP | DOMNamedNodeMap count() Function
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
$dom = new DOMDocument();
$dom ->loadXML("<?xml version=\"1.0\"?>
<root>
<html>
<h1 id=\"first\"
class =\"first\"
style=\"color: blue\">
Geeksforgeeks
</h1>
</html>
</root>");
$node = $dom ->getElementsByTagName( 'h1' )[0];
$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
$dom = new DOMDocument();
$dom ->loadXML("<?xml version=\"1.0\"?>
<root>
<html>
<h1 id=\"first\"
class =\"first\">
Geeksforgeeks
</h1>
<h2> Second heading </h2>
</html>
</root>");
$node = $dom ->getElementsByTagName( 'h1' )[0];
echo "Before the addition of attributes: <br>" ;
$attributeCount = $node ->attributes-> count ();
echo 'No of attributes => ' . $attributeCount ;
$node ->setAttribute( 'new' , 'value' );
echo "<br>After the addition of attributes: <br>" ;
$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
Last Updated :
26 Feb, 2020
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