PHP Manual: Validates the document based on its DTD

public bool DOMDocument::validate ( void )

Validates the document based on its DTD.

You can also use the validateOnParse property of DOMDocument to make a DTD validation.

Returns TRUE on success or FALSE on failure. If the document have no DTD attached, this method will return FALSE.

Example #1 Example of DTD validation


<?php
$dom = new DOMDocument;
$dom->load('book.xml');
if ($dom->validate()) {
    echo "This document is valid!\n";
}
?>

You can also validate your XML file while loading it:


<?php
$dom = new DOMDocument;
$dom->validateOnParse = true;
$dom->load('book.xml');
?>

DOMDocument::validate