The DOMNamedNodeMap::getNamedItem() function is an inbuilt function in PHP which is used to retrieve a node specified by name. This is used to get the attribute items and further get information about the attribute.
Syntax:
DOMNode DOMNamedNodeMap::getNamedItem( string $name )
Parameters: This function accepts a single parameter $name which holds the nodeName of the node to retrieve.
Return Value: This function returns DOMNode with the specified name on success.
Below examples illustrate the DOMNamedNodeMap::getNamedItem() function in PHP:
Example 1: In this example we will get the attribute value 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 value $attribute = $node->attributes->     getNamedItem('style')->nodeValue; echo $attribute; ?> |
Output:
color: blue
Example 2: In this example we will check if the function fetches the latest attribute values or not by altering the value of attribute.
<?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: <br>";      // Get the attribute value $attribute = $node->attributes->      getNamedItem('class')->nodeValue; echo $attribute;       // Change the value of attribute $node->setAttribute('class', 'changed');       echo "<br>After: <br>";    // Get the attribute value $attribute = $node->attributes->     getNamedItem('class')->nodeValue; echo $attribute; ?> |
Output:
Before: first After: changed
Reference: https://www.php.net/manual/en/domnamednodemap.getnameditem.php
