Edit File: serializeWithDtd.php
<?PHP /** * This example shows how to add a DocType Declaration to the XML document * * @author Stephan Schmidt <schst@php.net> */ error_reporting(E_ALL); require_once 'XML/Serializer.php'; $options = array( 'indent' => ' ', 'linebreak' => "\n", 'addDecl' => true, 'addDoctype' => true, 'doctype' => array( 'uri' => 'http://pear.php.net/dtd/package-1.0', 'id' => '-//PHP//PEAR/DTD PACKAGE 0.1' ) ); $serializer = new XML_Serializer($options); $foo = PEAR::raiseError('Just a test', 1234); $result = $serializer->serialize($foo); if( $result === true ) { echo '<pre>'; echo htmlentities($serializer->getSerializedData()); echo '</pre>'; } ?>