(PHP 5 >= 5.1.2)
XMLReader::isValid — Indicates if the parsed document is valid
Returns a boolean indicating if the document being parsed is currently valid.
Returns TRUE on success or FALSE on failure.
Example #1 Validating XML
<?php$xml = XMLReader::open('test.xml');// You must to use it$xml->setParserProperty(XMLReader::VALIDATE, true);var_dump($xml->isValid());?>