PHP | XMLReader lookupNamespace() Function Last Updated : 26 Mar, 2020 Summarize Comments Improve Suggest changes Share Like Article Like Report 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 Comment More infoAdvertise with us Next Article PHP | XMLReader moveToAttributeNs() Function G gurrrung Follow Improve Article Tags : Web Technologies PHP PHP-function PHP-XML 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 2 min read 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 2 min read 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 1 min read 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:: 2 min read 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: 2 min read 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 2 min read Like