PHP | DOMNode lookupNamespaceUri() Function

PHP | XMLReader lookupNamespace() Function

Last Updated : 26 Mar, 2020

The XMLReader::lookupNamespace() function is an inbuilt function in PHP which is used to lookup in scope namespace for a given prefix. Syntax:

string XMLReader::lookupNamespace( string $prefix )

Parameters: This function accepts a single parameter $prefix which holds the string containing the prefix. Return Value: This function returns TRUE on success or FALSE on failure. Below given programs illustrate the XMLReader::lookupNamespace() function in PHP: Program 1: Filename: data.xml

html

<?xml version="1.0" encoding="utf-8"?>
<div xmlns:z="my_namespace">
    <z:h1 z:attrib="value"> Foo Bar </z:h1>
</div>

Filename: index.php

php

<?php

// Create a new XMLReader instance
$XMLReader = new XMLReader();

// Open the XML file
$XMLReader->open('data.xml');

// Read the node
$XMLReader->read();

// Get the namespace with prefix y
$NS = $XMLReader->lookupNamespace("y");

// Show the namespace to browser
echo $NS;
?>

Output:

// Empty string because there is no namespace with prefix y.

Program 2: Filename: data.xml

html

<?xml version="1.0" encoding="utf-8"?>
<div xmlns:x="geeksforgeeks">
    <x:h1 x:attrib="value"> Namespaced Text </x:h1>
</div>

Filename: index.php

php

<?php

// Create a new XMLReader instance
$XMLReader = new XMLReader();

// Open the XML file
$XMLReader->open('data.xml');

// Read the node
$XMLReader->read();

// Get the namespace with prefix x
$NS = $XMLReader->lookupNamespace("x");

// Show the namespace to browser
echo $NS;
?>

Output:

geeksforgeeks

Reference: https://www.php.net/manual/en/xmlreader.lookupnamespace.php

PHP | DOMNode lookupNamespaceUri() Function

gurrrung

Improve

Article Tags :

Similar Reads

PHP | XMLReader next() Function

The XMLReader::next() function is an inbuilt function in PHP which is used to move cursor to next node skipping all subtrees. Another usage of this function is it accepts the name of the node to directly move to the element.Syntax:Â Â bool XMLReader::next( string $localname ) Parameters: This functio

PHP | XMLReader isValid() Function

The XMLReader::isValid() function is an inbuilt function in PHP which is used to check if the document being parsed is valid or not. An XML is valid if it is written by following a DTD (Document Type Definition) which defines all the allowed elements and the structure of elements. Syntax: bool XMLRe

PHP | DOMNode lookupNamespaceUri() Function

The DOMNode::lookupNamespaceUri() function is an inbuilt function in PHP which is used to get the namespace URI of the node based on the prefix. Syntax: string DOMNode::lookupNamespaceUri( string $prefix ) Parameters: This function accepts a single parameter $prefix which holds the prefix. Return Va

PHP | XMLReader moveToElement() Function

The XMLReader::moveToElement() function is an inbuilt function in PHP which is used to move cursor to the parent element of current attribute. This function can be used to get the element having certain attributes by combining this with XMLReader::moveToAttribute() function. Syntax: bool XMLReader::

PHP | XMLReader moveToAttributeNs() Function

The XMLReader::moveToAttributeNs() function is an inbuilt function in PHP which is used to move cursor on the named attribute in specified namespace. This method is useful when we want to get the attribute value of a specific attribute in a specific namespace and ignore all other namespaces. Syntax:

PHP | XMLReader moveToAttribute() Function

The XMLReader::moveToAttribute() function is an inbuilt function in PHP which is used to move cursor to a named attribute. Syntax: bool XMLReader::moveToAttribute( string $name ) Parameters: This function accepts a single parameter $name which holds the name of the attribute. Return Value: This func

PHP | xml_parse() Function

The xml_parse() function is an inbuilt function in PHP which is used to parse XML document. Syntax:Â int xml_parse( resource $xml_parser, string $xml_data, bool $is_final ) Parameter: This function accepts three parameters as mentioned above and described below:Â Â $xml_parser: It is required paramet

PHP | SimpleXMLElement getDocNamespaces() Function

Pre-requisite: Read XML Basics The SimpleXMLElement::getDocNamespaces() function is an inbuilt function in PHP which is used to retrieve the namespaces declared in XML document. Syntax: array SimpleXMLElement::getDocNamespaces( $recursive, $from_root ) Parameters: This function accepts two parameter

PHP | SimpleXMLElement getNamespaces() Function

Pre-requisite: Read XML basics The SimpleXMLElement::getNamespaces() function is an inbuilt function in PHP which is used to retrieve the namespaces declared in XML document. Syntax: array SimpleXMLElement::getNamespaces( $recursive ) Parameter: This function accepts single parameter $recursive whic

PHP | XMLReader moveToAttributeNo() Function

The XMLReader::moveToAttributeNo() function is an inbuilt function in PHP which is used to move cursor to an attribute by index. This function is useful when a node is having multiple attributes but we want only specific attributes only. Syntax: bool XMLReader::moveToAttributeNo( int $index ) Parame