(PHP 5 >= 5.0.1, PHP 7) Return a well-formed XML string based on SimpleXML element

(PHP 5 >= 5.2.0, PHP 7) Runs XPath query on XML data

(PHP 5 >= 5.0.1, PHP 7) Finds children of given node

(PHP 5 >= 5.3.0, PHP 7) Counts the children of an element

(PHP 5 >= 5.0.1, PHP 7) Creates a new SimpleXMLElement object

(PHP 5 >= 5.2.0, PHP 7) Alias of

(PHP 5 >= 5.2.0, PHP 7) Creates a prefix/ns context for the next XPath query

(PHP 5 >= 5.1.3, PHP 7) Gets the name of the XML element

(PHP 5 >= 5.1.3, PHP 7) Adds a child element to the XML node

(PHP 5 >= 5.1.2, PHP 7) Returns namespaces declared in document