Since its introduction in 1998, XML has become an indispensable technology for exchanging data and operating across heterogeneous systems. Whether you're sharing calendar events, importing syndication feeds, or querying an external API, XML is usually one of the formats available for consumption. Early versions of PHP provided extensions for working with XML, but it wasn't until the introduction of SimpleXML, DOM, XMLReader, and XMLWriter in PHP 5 that working with XML was streamlined. XML Parsing with PHP, edited and produced by php architect], provides a comprehensive survey of the classes...