Something

#!/usr/bin/php
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);

$dirtyHtml = "TEST STRING";

$tidyConfig = array('output-xhtml' => true);

#unset($tidy);

echo("<p>BEFORE TIDY</p>");
$tidy = new tidy;
echo("<p>AFTER TIDY</p>");

$tidy->parseString($dirtyHtml, $tidyConfig, 'utf8');

$tidy->cleanRepair();

var_dump($tidy);

?>