Xml validating in dom parser

The use of text/xml has been criticized RFC 7303 also recommends that XML-based languages be given media types ending in xml; for example image/svg xml for SVG.Further guidelines for the use of XML in a networked context appear in RFC 3470, also known as IETF BCP 70, a document covering many aspects of designing and deploying an XML-based language.Hopefully it'll save someone else the trouble of reinventing this wheel.Note that these DOM functions expect (and presumably return) all their data in UTF-8 character encoding, regardless of what PHP's current encoding is.The material in this section is based on the XML Specification.

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As of release 2.4.16, libxml2 passed all 1800 tests from the OASIS XML Tests Suite.

Event-based parsers do not need to load the entire file into memory to begin parsing.

In computing, Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.

While this SAX event based parser is better for memory management than the tree based parsers of Simple XML and DOM, the pull-based parser XMLReader is much easier to use than the xml_parser_* functions, and still doesn't require loading the file into memory.

An event-based parser such XML Parser is preferable for large files, because tree-based parsers must fully load the file into memory in order to parse the XML.