Trouble with a google script

[nichemtktg]

I'm trying to use this script from: https://developers.g...cles/phpsqlajax

Google calls this script: phpsqlajax_genxml.php

I've checked the php_domxml extension and restarted my wampserver. I'm running php 5.2.9-2.

I've defined $username, $password, and $database per instructions in a script called phpsqlajax_dbinfo.php.

It's causing errors. Do you know what's causing these problems?

Warning: domnode::append_child() expects parameter 1 to be object, null given in E:\wamp\www\phpsqlajax_genxml.php on line 7

Notice: Use of undefined constant localhost - assumed 'localhost' in E:\wamp\www\phpsqlajax_genxml.php on line 10

Notice: Undefined variable: username in E:\wamp\www\phpsqlajax_genxml.php on line 10

Notice: Undefined variable: password in E:\wamp\www\phpsqlajax_genxml.php on line 10

Warning: mysql_connect() [function.mysql-connect]: Access denied for user 'ODBC'@'localhost' (using password: NO) in E:\wamp\www\phpsqlajax_genxml.php on line 10 Not connected : Access denied for user 'ODBC'@'localhost' (using password: NO)

<?php
require("phpsqlajax_dbinfo.php");
         
// Start XML file, create parent node
$doc = domxml_new_doc("1.0");
$node = $doc->create_element("markers");
$parnode = $doc->append_child($node);

// Opens a connection to a mySQL server
$connection=mysql_connect ("localhost", $username, $password);
if (!$connection) {
  die('Not connected : ' . mysql_error());
}

// Set the active mySQL database
$db_selected = mysql_select_db($database, $connection);
if (!$db_selected) {
  die ('Can\'t use db : ' . mysql_error());
}

// Select all the rows in the markers table
$query = "SELECT * FROM markers WHERE 1";
$result = mysql_query($query);
if (!$result) {
  die('Invalid query: ' . mysql_error());
}

header("Content-type: text/xml");

// Iterate through the rows, adding XML nodes for each
while ($row = @mysql_fetch_assoc($result)){
  // ADD TO XML DOCUMENT NODE
  $node = $doc->create_element("marker");
  $newnode = $parnode->append_child($node);

  $newnode->set_attribute("name", $row['name']);
  $newnode->set_attribute("address", $row['address']);
  $newnode->set_attribute("lat", $row['lat']);
  $newnode->set_attribute("lng", $row['lng']);
  $newnode->set_attribute("type", $row['type']);
}

$xmlfile = $doc->dump_mem();
echo $xmlfile;

?>