Mongodb php get id of new document?

Question

Creating a document:

$db->collection->insert($content);
// $newDocID = ???

I\'m trying to get the new document\'s id. How? Thanks.

Answer 1

 $newDocument = $db->collection->findAndModify ( $row, $row, null, array('new'=>true,'upsert' => true));
 $strId = $newDocument['_id']->{'$id'};

http://php.net/manual/en/mongocollection.findandmodify.php