WordPress MU permalink structure.php

<?php
include('wp-config.php');

mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
mysql_select_db(DB_NAME);

$results = array();

$n = 0;

for($i=1; $i < 500; $i++)
{
	$q = mysql_query("SELECT `option_value` FROM wp_".$i."_options WHERE option_name = 'permalink_structure'");
	
	if($q)
	{
		$r = mysql_fetch_array($q);
		if(!isset($results[$r[0]])){ $results[$r[0]] = 0; }
		$results[$r[0]] = $results[$r[0]] + 1;
		$n++;
	}
}

header('Content-type: text/plain');
print_r($results);
echo "\nTotal number of blogs = {$n}";

?>