Introduction : XML document is a well-organized collection of components and associated markup. An XML document can hold a wide range of information.  For instance, a database having numbers or a mathematical equation etc....

XML stands for Extensible Markup Language. It is a dynamic markup language. It is used to transform data from one form to another form....

The XMLReader::XML() function is an inbuilt function in PHP which is used to set the data containing the XML to parse. XML() function serves the same purpose as open function but the only difference is former accepts XML as string while later accepts it as a separate .xml file....

The XMLReader::getAttribute() function is an inbuilt function in PHP which is used to get the value of a named attribute....

The XMLWriter::openUri() function is an inbuilt function in PHP which is used to create a new XMLWriter using source URI for output. In simple words, this function decides how to output the XML to user, it can be through a browser or directly to a file....

The XMLWriter::setIndent() function is an inbuilt function in PHP which is used to toggle indentation on/off in the XML document which is off by default....

The XMLReader::setSchema() function is an inbuilt function in PHP which is used to validate the document using a XSD schema. This XSD schema is nothing but a file that defines the rule for the XML structure and should be in the form of .xsd file....

The xml_parser_create() function is an inbuilt function in PHP which is used to create an XML parser....

The XMLReader::readInnerXml() function is an inbuilt function in PHP which is used to read the contents of the current node, including child nodes and markup....

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:...

The xml_parse_into_struct() function is an inbuilt function in PHP which is used to parse XML data into an array structure. The XML data are parsed into two parallel array structures, first one is index array that contains pointers to the location of the values in the value array and second one is value array that contains the data from the parsed XML....

The XMLReader::expand() function is an inbuilt function in PHP which is used to copy the current node and returns the appropriate DOM object....