The reflection information agrees with the current documentation in [MongoCollection::remove()](http://us2.php.net/manual/en/mongocollection.remove.php):

```
$ php --rf MongoCollection::remove
Method [ <internal:mongo> public method remove ] {

  - Parameters [2] {
    Parameter #0 [ <optional> $array_of_fields_OR_object ]
    Parameter #1 [ <optional> array $options ]
  }
}
```