PHP Manual
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(no version information, might be only in CVS)
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');?>