Mongodb replacing values 2 arrays deep in PHP - php

Question

I have an Mongo Collection that looks like this
{
"_id": ObjectId("0000000000000123"),
"user_id": NumberLong(000010),
"location": {
"addresses": [{
"number": NumberLong(4410),
"street": "Test Drive",
"county": "New York County",
"city": "New York",
"state": "NY",
"zip": "00001",
"links": [{
"image": "http://www.google.com/test",
"datetime": " 11/24/1952"
}, {
"image": "http://www.google.com/test2",
"datetime": " 11/24/1990"
}
]
}
]
}
}
I need to be able to search for the links array for documents with www.google.com and be able to change it to www.yahoo.com
I tried a few versions of mongo's update but no success
$search_string = new MongoRegex("/www.google.com/i");
$collection->update(
array('location.addresses.links.image' => $search_string),
array('$set' => array('location.addresses.$.links.$.image' => '')),
array("multiple" => true)
);

Answer 1

So after more digging I found that the update position operator ($) can only be used one level deep.
So I decided to use foreach statements by reference to get what i needed done
$collection = new MongoCollection($this->db, 'users');
$search_string = new MongoRegex("/www.google.com/i");
$cursor = $collection->find(array('location.addresses.links.image' => $search_string));
foreach ($cursor as $doc)
{
foreach ($doc['location']['addresses'] as &$address)
{
foreach($address['links'] as &$link)
{
$link['image'] = str_replace('www.google.com', 'www.yahoo.com', $offender['image']);
}
}
$collection->update(array("_id" => $doc['_id']), $doc);
}