retrieve mongo attachment data, iterate through and retrieve each file

getMongoAttachment.php

<?php
$mongoDB = new Mongo();
$database = $mongoDB->selectDB("BVS");
$collection = $database->createCollection('fs.files');
//to get the attachments metadata back
$query = array("metadata.formdata.claimid" => "SUS14052012-001");
// $items is a cursor of mongodata
$items = $collection->find($query);
//iterate through the collection and retrieve the named file
$grid = $database->getGridFS();
foreach ($items as $item => $value) {
    $fileName =$value["metadata"]["uploaddata"]["filename"];
// md5 represents a unique key for a file so is a good one to use
	$md5 = $value["md5"];
	$file = $grid->findOne(array("md5" => $md5));
	$target = './' . $fileName;
	$file->write($target);
}?>