The DOMNamedNodeMap::getNamedItemNS() function is an inbuilt function in PHP which is used to retrieve a node with a specific local name and namespace URI. This function can be used to get the value of a attribute from a specific namespace.
Syntax:
DOMNode DOMNamedNodeMap::getNamedItemNS ( string $namespaceURl, string $localName )
Parameters: This function accepts two parameters as mentioned above and described below:
- $namespaceURl: It specifies the namespace URI.
- $localName: It specifies the local name.
Return Value: This function returns a node with given local name and namespace URI.
Below given programs illustrate the DOMNamedNodeMap::getNamedItemNS() function in PHP:
Program 1: In this example, we will get the attribute value of a element with two different namespaces.
<?php // Create a new DOMDocument $dom = new DOMDocument(); Â Â // Create an element with namespace $node = $dom->createElementNS( Â Â Â "my_namespace", "x:p", 'Hello, this is my paragraph.'); Â Â // Add the node to the dom $newnode = $dom->appendChild($node); Â Â // Set the attribute with a namespace $newnode->setAttributeNS("my_namespace", "style", "color:blue"); Â Â echo "<b>Attributes with my_namespace as namespace:</b> <br>"; Â Â // Get the attribute value $attribute =Â Â Â Â $node->attributes->getNamedItemNS('my_namespace', 'style')->nodeValue; echo $attribute; Â Â echo "<br><b>Attributes with other_namespace as namespace:</b> <br>"; Â Â // Get the attribute value $attribute =Â Â Â Â $node->attributes->getNamedItemNS('other_namespace', 'style')->nodeValue; echo $attribute; ?> |
Output:
Attributes with my_namespace as namespace: color:blue Attributes with other_namespace as namespace: // Empty string means no attributes found.
Program 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();   // Create an element $node = $dom->createElementNS("my_namespace", "x:p", 'neveropen');   // Add the node to the dom $newnode = $dom->appendChild($node);   // Set the attribute with a namespace $newnode->setAttributeNS("my_namespace", "style", "color:blue");   echo "<b>Before:</b> <br>";   // Get the attribute value $attribute =     $node->attributes->getNamedItemNS('my_namespace', 'style')->nodeValue; echo $attribute;   // Change the attribute value $newnode->setAttributeNS("my_namespace", "style", "color:red");   echo "<br><b>After:</b> <br>";   // Get the attribute value $attribute =     $node->attributes->getNamedItemNS('my_namespace', 'style')->nodeValue; echo $attribute; ?> |
Output:
Before: color:blue After: color:red
Reference: https://www.php.net/manual/en/domnamednodemap.getnameditemns.php
