(PHP 5 >= 5.1.0, PHP 7, PHP 8)
XMLReader::isValid — Indicates if the parsed document is valid
Returns a boolean indicating if the document being parsed is currently valid according to the DTD, or an XML or RelaxNG schema. If there there is no schema, and the DTD validation option is not provided, this method will return false.
This function has no parameters.
Example #1 Validating XML
<?php
$xml = XMLReader::open('test.xml');
// The validate parser option must be enabled for
// this method to work properly
$xml->setParserProperty(XMLReader::VALIDATE, true);
var_dump($xml->isValid());
?>Note: This checks the current node, not the entire document.