[mongodb-user] convert some code from .net to php

I am trying to move a project to the open source world (PHP).
Before I saw the light I was using mongodb with microsoft.net.
BTW: I just finished the mongodb DBA course. I greatly recommend it.

I have a small piece of code that I wrote in .net and want to see if i can
reproduce it in php.

string jsonresult = "";
string connectionString;
MongoDB.Driver.MongoDatabase db;
MongoClient client;
MongoDB.Driver.MongoServer server;
var connectionString = "mongodb://localhost";
var client = new MongoClient(connectionString);
var server = client.GetServer();
var db = server.GetDatabase("mydb"); // WriteConcern defaulted to
Acknowledged

var rp = "listcustomer";
// now from here down, i don't know the equivalents in php

MongoDB.Driver.MongoCollection<BsonDocument> collection =
db.GetCollection<BsonDocument>("customers");

// parms is a bson document, but you can assume that in php, it is
an associative array

switch (rp)
{
case "listcustomers":
{
var query = new QueryDocument();
string [] fields = {"_id", "name"};
var cursor =
collection.FindAs<BsonDocument>(query).SetFields(fields);
jsonresult = cursor.ToJson();
break;
}
case "getcustomer":
{
var oid =
MongoDB.Bson.ObjectId.Parse(parms["_id"].ToString());
var query = new QueryDocument("_id", oid);
var cursor = collection.FindOne(query);
jsonresult = cursor.ToJson();
break;
}

case "setcustomer":
{
string _id = parms["_id"].ToString();
if (_id == "")
{
var oid = ObjectId.GenerateNewId();
parms["_id"] = oid;
collection.Save(parms);
}
else
{
var oid =
MongoDB.Bson.ObjectId.Parse(parms["_id"].ToString());
parms["_id"] = oid;
collection.Save(parms);
}
jsonresult = "{\"_id\" : \"" + parms["_id"].ToString()
+ "\"}";
break;
}
case "deletecustomer":
{
var oid =
MongoDB.Bson.ObjectId.Parse(parms["_id"].ToString());
var query = new QueryDocument("_id", oid);
collection.Remove(query);
jsonresult = "{\"_id\" : \"" + parms["_id"].ToString()
+ "\"}";
break;
}
}
Response.Write(jsonresult);

Help is greatly appreciated